Merge pull request #22232 from markdroth/service_config_parsing_update

update service config parsing as per recent spec change

src/core/ext/filters/client_channel/client_channel.cc

@@ -1630,8 +1630,8 @@ void ChannelData::ProcessLbPolicy(
   // If not, try the setting from channel args.
   const char* policy_name = nullptr;
   if (parsed_service_config != nullptr &&
-      parsed_service_config->parsed_deprecated_lb_policy() != nullptr) {
-    policy_name = parsed_service_config->parsed_deprecated_lb_policy();
+      !parsed_service_config->parsed_deprecated_lb_policy().empty()) {
+    policy_name = parsed_service_config->parsed_deprecated_lb_policy().c_str();
   } else {
     const grpc_arg* channel_arg =
         grpc_channel_args_find(resolver_result.args, GRPC_ARG_LB_POLICY_NAME);

src/core/ext/filters/client_channel/resolver_result_parsing.cc

@@ -317,7 +317,7 @@ ClientChannelServiceConfigParser::ParseGlobalParams(const Json& json,
   GPR_DEBUG_ASSERT(error != nullptr && *error == GRPC_ERROR_NONE);
   std::vector<grpc_error*> error_list;
   RefCountedPtr<LoadBalancingPolicy::Config> parsed_lb_config;
-  grpc_core::UniquePtr<char> lb_policy_name;
+  std::string lb_policy_name;
   Optional<ClientChannelGlobalParsedConfig::RetryThrottling> retry_throttling;
   const char* health_check_service_name = nullptr;
   // Parse LB config.
@@ -340,16 +340,13 @@ ClientChannelServiceConfigParser::ParseGlobalParams(const Json& json,
       error_list.push_back(GRPC_ERROR_CREATE_FROM_STATIC_STRING(
           "field:loadBalancingPolicy error:type should be string"));
     } else {
-      lb_policy_name.reset(gpr_strdup(it->second.string_value().c_str()));
-      char* lb_policy = lb_policy_name.get();
-      if (lb_policy != nullptr) {
-        for (size_t i = 0; i < strlen(lb_policy); ++i) {
-          lb_policy[i] = tolower(lb_policy[i]);
-        }
+      lb_policy_name = it->second.string_value();
+      for (size_t i = 0; i < lb_policy_name.size(); ++i) {
+        lb_policy_name[i] = tolower(lb_policy_name[i]);
       }
       bool requires_config = false;
       if (!LoadBalancingPolicyRegistry::LoadBalancingPolicyExists(
-              lb_policy, &requires_config)) {
+              lb_policy_name.c_str(), &requires_config)) {
         error_list.push_back(GRPC_ERROR_CREATE_FROM_STATIC_STRING(
             "field:loadBalancingPolicy error:Unknown lb policy"));
       } else if (requires_config) {
@@ -357,7 +354,7 @@ ClientChannelServiceConfigParser::ParseGlobalParams(const Json& json,
         gpr_asprintf(&error_msg,
                      "field:loadBalancingPolicy error:%s requires a config. "
                      "Please use loadBalancingConfig instead.",
-                     lb_policy);
+                     lb_policy_name.c_str());
         error_list.push_back(GRPC_ERROR_CREATE_FROM_COPIED_STRING(error_msg));
         gpr_free(error_msg);
       }

src/core/ext/filters/client_channel/resolver_result_parsing.h

@@ -46,7 +46,7 @@ class ClientChannelGlobalParsedConfig : public ServiceConfig::ParsedConfig {
 
   ClientChannelGlobalParsedConfig(
       RefCountedPtr<LoadBalancingPolicy::Config> parsed_lb_config,
-      grpc_core::UniquePtr<char> parsed_deprecated_lb_policy,
+      std::string parsed_deprecated_lb_policy,
       const Optional<RetryThrottling>& retry_throttling,
       const char* health_check_service_name)
       : parsed_lb_config_(std::move(parsed_lb_config)),
@@ -62,8 +62,8 @@ class ClientChannelGlobalParsedConfig : public ServiceConfig::ParsedConfig {
     return parsed_lb_config_;
   }
 
-  const char* parsed_deprecated_lb_policy() const {
-    return parsed_deprecated_lb_policy_.get();
+  const std::string& parsed_deprecated_lb_policy() const {
+    return parsed_deprecated_lb_policy_;
   }
 
   const char* health_check_service_name() const {
@@ -72,7 +72,7 @@ class ClientChannelGlobalParsedConfig : public ServiceConfig::ParsedConfig {
 
  private:
   RefCountedPtr<LoadBalancingPolicy::Config> parsed_lb_config_;
-  grpc_core::UniquePtr<char> parsed_deprecated_lb_policy_;
+  std::string parsed_deprecated_lb_policy_;
   Optional<RetryThrottling> retry_throttling_;
   const char* health_check_service_name_;
 };

src/core/ext/filters/client_channel/service_config.cc

@@ -20,6 +20,8 @@
 
 #include <string.h>
 
+#include "absl/strings/str_cat.h"
+
 #include <grpc/impl/codegen/grpc_types.h>
 #include <grpc/support/alloc.h>
 #include <grpc/support/log.h>
@@ -27,9 +29,7 @@
 
 #include "src/core/lib/gpr/string.h"
 #include "src/core/lib/json/json.h"
-#include "src/core/lib/slice/slice_hash_table.h"
 #include "src/core/lib/slice/slice_internal.h"
-#include "src/core/lib/slice/slice_string_helpers.h"
 
 namespace grpc_core {
 
@@ -77,6 +77,12 @@ ServiceConfig::ServiceConfig(std::string json_string, Json json,
   }
 }
 
+ServiceConfig::~ServiceConfig() {
+  for (auto& p : parsed_method_configs_map_) {
+    grpc_slice_unref_internal(p.first);
+  }
+}
+
 grpc_error* ServiceConfig::ParseGlobalParams() {
   std::vector<grpc_error*> error_list;
   for (size_t i = 0; i < g_registered_parsers->size(); i++) {
@@ -91,10 +97,8 @@ grpc_error* ServiceConfig::ParseGlobalParams() {
   return GRPC_ERROR_CREATE_FROM_VECTOR("Global Params", &error_list);
 }
 
-grpc_error* ServiceConfig::ParseJsonMethodConfigToServiceConfigVectorTable(
-    const Json& json,
-    InlinedVector<SliceHashTable<const ParsedConfigVector*>::Entry, 10>*
-        entries) {
+grpc_error* ServiceConfig::ParseJsonMethodConfig(const Json& json) {
+  // Parse method config with each registered parser.
   auto objs_vector = absl::make_unique<ParsedConfigVector>();
   InlinedVector<grpc_error*, 4> error_list;
   for (size_t i = 0; i < g_registered_parsers->size(); i++) {
@@ -108,8 +112,8 @@ grpc_error* ServiceConfig::ParseJsonMethodConfigToServiceConfigVectorTable(
   }
   parsed_method_config_vectors_storage_.push_back(std::move(objs_vector));
   const auto* vector_ptr = parsed_method_config_vectors_storage_.back().get();
-  // Construct list of paths.
-  InlinedVector<UniquePtr<char>, 10> paths;
+  // Add an entry for each path.
+  bool found_name = false;
   auto it = json.object_value().find("name");
   if (it != json.object_value().end()) {
     if (it->second.type() != Json::Type::ARRAY) {
@@ -120,29 +124,42 @@ grpc_error* ServiceConfig::ParseJsonMethodConfigToServiceConfigVectorTable(
     const Json::Array& name_array = it->second.array_value();
     for (const Json& name : name_array) {
       grpc_error* parse_error = GRPC_ERROR_NONE;
-      UniquePtr<char> path = ParseJsonMethodName(name, &parse_error);
-      if (path == nullptr) {
+      std::string path = ParseJsonMethodName(name, &parse_error);
+      if (parse_error != GRPC_ERROR_NONE) {
         error_list.push_back(parse_error);
       } else {
-        GPR_DEBUG_ASSERT(parse_error == GRPC_ERROR_NONE);
-        paths.push_back(std::move(path));
+        found_name = true;
+        if (path.empty()) {
+          if (default_method_config_vector_ != nullptr) {
+            error_list.push_back(GRPC_ERROR_CREATE_FROM_STATIC_STRING(
+                "field:name error:multiple default method configs"));
+          }
+          default_method_config_vector_ = vector_ptr;
+        } else {
+          grpc_slice key = grpc_slice_from_copied_string(path.c_str());
+          // If the key is not already present in the map, this will
+          // store a ref to the key in the map.
+          auto& value = parsed_method_configs_map_[key];
+          if (value != nullptr) {
+            error_list.push_back(GRPC_ERROR_CREATE_FROM_STATIC_STRING(
+                "field:name error:multiple method configs with same name"));
+            // The map entry already existed, so we need to unref the
+            // key we just created.
+            grpc_slice_unref_internal(key);
+          } else {
+            value = vector_ptr;
+          }
+        }
       }
     }
   }
-  if (paths.size() == 0) {
-    error_list.push_back(
-        GRPC_ERROR_CREATE_FROM_STATIC_STRING("No names specified"));
-  }
-  // Add entry for each path.
-  for (size_t i = 0; i < paths.size(); ++i) {
-    entries->push_back(
-        {grpc_slice_from_copied_string(paths[i].get()), vector_ptr});
+  if (!found_name) {
+    parsed_method_config_vectors_storage_.pop_back();
   }
   return GRPC_ERROR_CREATE_FROM_VECTOR("methodConfig", &error_list);
 }
 
 grpc_error* ServiceConfig::ParsePerMethodParams() {
-  InlinedVector<SliceHashTable<const ParsedConfigVector*>::Entry, 10> entries;
   std::vector<grpc_error*> error_list;
   auto it = json_.object_value().find("methodConfig");
   if (it != json_.object_value().end()) {
@@ -156,91 +173,80 @@ grpc_error* ServiceConfig::ParsePerMethodParams() {
             "field:methodConfig error:not of type Object"));
         continue;
       }
-      grpc_error* error = ParseJsonMethodConfigToServiceConfigVectorTable(
-          method_config, &entries);
+      grpc_error* error = ParseJsonMethodConfig(method_config);
       if (error != GRPC_ERROR_NONE) {
         error_list.push_back(error);
       }
     }
   }
-  if (!entries.empty()) {
-    parsed_method_configs_table_ =
-        SliceHashTable<const ParsedConfigVector*>::Create(
-            entries.size(), entries.data(), nullptr);
-  }
   return GRPC_ERROR_CREATE_FROM_VECTOR("Method Params", &error_list);
 }
 
-UniquePtr<char> ServiceConfig::ParseJsonMethodName(const Json& json,
-                                                   grpc_error** error) {
+std::string ServiceConfig::ParseJsonMethodName(const Json& json,
+                                               grpc_error** error) {
   if (json.type() != Json::Type::OBJECT) {
     *error = GRPC_ERROR_CREATE_FROM_STATIC_STRING(
         "field:name error:type is not object");
-    return nullptr;
+    return "";
   }
   // Find service name.
+  const std::string* service_name = nullptr;
   auto it = json.object_value().find("service");
-  if (it == json.object_value().end()) {
-    *error = GRPC_ERROR_CREATE_FROM_STATIC_STRING(
-        "field:name error: field:service error:not found");
-    return nullptr;  // Required field.
-  }
-  if (it->second.type() != Json::Type::STRING) {
-    *error = GRPC_ERROR_CREATE_FROM_STATIC_STRING(
-        "field:name error: field:service error:not of type string");
-    return nullptr;
-  }
-  if (it->second.string_value().empty()) {
-    *error = GRPC_ERROR_CREATE_FROM_STATIC_STRING(
-        "field:name error: field:service error:empty value");
-    return nullptr;
+  if (it != json.object_value().end() &&
+      it->second.type() != Json::Type::JSON_NULL) {
+    if (it->second.type() != Json::Type::STRING) {
+      *error = GRPC_ERROR_CREATE_FROM_STATIC_STRING(
+          "field:name error: field:service error:not of type string");
+      return "";
+    }
+    if (!it->second.string_value().empty()) {
+      service_name = &it->second.string_value();
+    }
   }
-  const char* service_name = it->second.string_value().c_str();
-  const char* method_name = nullptr;
+  const std::string* method_name = nullptr;
   // Find method name.
   it = json.object_value().find("method");
-  if (it != json.object_value().end()) {
+  if (it != json.object_value().end() &&
+      it->second.type() != Json::Type::JSON_NULL) {
     if (it->second.type() != Json::Type::STRING) {
       *error = GRPC_ERROR_CREATE_FROM_STATIC_STRING(
           "field:name error: field:method error:not of type string");
-      return nullptr;
+      return "";
+    }
+    if (!it->second.string_value().empty()) {
+      method_name = &it->second.string_value();
     }
-    if (it->second.string_value().empty()) {
+  }
+  // If neither service nor method are specified, it's the default.
+  // Method name may not be specified without service name.
+  if (service_name == nullptr) {
+    if (method_name != nullptr) {
       *error = GRPC_ERROR_CREATE_FROM_STATIC_STRING(
-          "field:name error: field:method error:empty value");
-      return nullptr;
+          "field:name error:method name populated without service name");
     }
-    method_name = it->second.string_value().c_str();
+    return "";
   }
-  char* path;
-  gpr_asprintf(&path, "/%s/%s", service_name,
-               method_name == nullptr ? "" : method_name);
-  return grpc_core::UniquePtr<char>(path);
+  // Construct path.
+  return absl::StrCat("/", *service_name, "/",
+                      method_name == nullptr ? "" : *method_name);
 }
 
 const ServiceConfig::ParsedConfigVector*
-ServiceConfig::GetMethodParsedConfigVector(const grpc_slice& path) {
-  if (parsed_method_configs_table_.get() == nullptr) {
-    return nullptr;
-  }
-  const auto* value = parsed_method_configs_table_->Get(path);
+ServiceConfig::GetMethodParsedConfigVector(const grpc_slice& path) const {
+  // Try looking up the full path in the map.
+  auto it = parsed_method_configs_map_.find(path);
+  if (it != parsed_method_configs_map_.end()) return it->second;
   // If we didn't find a match for the path, try looking for a wildcard
   // entry (i.e., change "/service/method" to "/service/").
-  if (value == nullptr) {
-    char* path_str = grpc_slice_to_c_string(path);
-    const char* sep = strrchr(path_str, '/') + 1;
-    const size_t len = (size_t)(sep - path_str);
-    char* buf = (char*)gpr_malloc(len + 1);  // trailing NUL
-    memcpy(buf, path_str, len);
-    buf[len] = '\0';
-    grpc_slice wildcard_path = grpc_slice_from_copied_string(buf);
-    gpr_free(buf);
-    value = parsed_method_configs_table_->Get(wildcard_path);
-    grpc_slice_unref_internal(wildcard_path);
-    gpr_free(path_str);
-    if (value == nullptr) return nullptr;
-  }
-  return *value;
+  UniquePtr<char> path_str(grpc_slice_to_c_string(path));
+  char* sep = strrchr(path_str.get(), '/') + 1;
+  if (sep == nullptr) return nullptr;  // Shouldn't ever happen.
+  *sep = '\0';
+  grpc_slice wildcard_path = grpc_slice_from_static_string(path_str.get());
+  it = parsed_method_configs_map_.find(wildcard_path);
+  if (it != parsed_method_configs_map_.end()) return it->second;
+  // Try default method config, if set.
+  return default_method_config_vector_;
 }
 
 size_t ServiceConfig::RegisterParser(std::unique_ptr<Parser> parser) {

src/core/ext/filters/client_channel/service_config.h

@@ -19,6 +19,8 @@
 
 #include <grpc/support/port_platform.h>
 
+#include <unordered_map>
+
 #include <grpc/impl/codegen/grpc_types.h>
 #include <grpc/support/string_util.h>
 
@@ -27,7 +29,7 @@
 #include "src/core/lib/gprpp/ref_counted_ptr.h"
 #include "src/core/lib/iomgr/error.h"
 #include "src/core/lib/json/json.h"
-#include "src/core/lib/slice/slice_hash_table.h"
+#include "src/core/lib/slice/slice_internal.h"
 
 // The main purpose of the code here is to parse the service config in
 // JSON form, which will look like this:
@@ -129,6 +131,7 @@ class ServiceConfig : public RefCounted<ServiceConfig> {
                                              grpc_error** error);
 
   ServiceConfig(std::string json_string, Json json, grpc_error** error);
+  ~ServiceConfig();
 
   const std::string& json_string() const { return json_string_; }
 
@@ -143,7 +146,8 @@ class ServiceConfig : public RefCounted<ServiceConfig> {
   /// Retrieves the vector of parsed configs for the method identified
   /// by \a path.  The lifetime of the returned vector and contained objects
   /// is tied to the lifetime of the ServiceConfig object.
-  const ParsedConfigVector* GetMethodParsedConfigVector(const grpc_slice& path);
+  const ParsedConfigVector* GetMethodParsedConfigVector(
+      const grpc_slice& path) const;
 
   /// Globally register a service config parser. On successful registration, it
   /// returns the index at which the parser was registered. On failure, -1 is
@@ -162,15 +166,11 @@ class ServiceConfig : public RefCounted<ServiceConfig> {
   grpc_error* ParseGlobalParams();
   grpc_error* ParsePerMethodParams();
 
-  // Returns a path string for the JSON name object specified by \a json.
-  // Returns null on error, and stores error in \a error.
-  static UniquePtr<char> ParseJsonMethodName(const Json& json,
-                                             grpc_error** error);
+  // Returns a path string for the JSON name object specified by json.
+  // Sets *error on error.
+  static std::string ParseJsonMethodName(const Json& json, grpc_error** error);
 
-  grpc_error* ParseJsonMethodConfigToServiceConfigVectorTable(
-      const Json& json,
-      InlinedVector<SliceHashTable<const ParsedConfigVector*>::Entry, 10>*
-          entries);
+  grpc_error* ParseJsonMethodConfig(const Json& json);
 
   std::string json_string_;
   Json json_;
@@ -180,8 +180,10 @@ class ServiceConfig : public RefCounted<ServiceConfig> {
   // A map from the method name to the parsed config vector. Note that we are
   // using a raw pointer and not a unique pointer so that we can use the same
   // vector for multiple names.
-  RefCountedPtr<SliceHashTable<const ParsedConfigVector*>>
-      parsed_method_configs_table_;
+  std::unordered_map<grpc_slice, const ParsedConfigVector*, SliceHash>
+      parsed_method_configs_map_;
+  // Default method config.
+  const ParsedConfigVector* default_method_config_vector_ = nullptr;
   // Storage for all the vectors that are being used in
   // parsed_method_configs_table_.
   InlinedVector<std::unique_ptr<ParsedConfigVector>, 32>

src/core/lib/slice/slice_internal.h

@@ -347,4 +347,18 @@ size_t grpc_slice_memory_usage(grpc_slice s);
 grpc_core::UnmanagedMemorySlice grpc_slice_sub_no_ref(
     const grpc_core::UnmanagedMemorySlice& source, size_t begin, size_t end);
 
+namespace grpc_core {
+
+struct SliceHash {
+  std::size_t operator()(const grpc_slice& slice) const {
+    return grpc_slice_hash_internal(slice);
+  }
+};
+
+}  // namespace grpc_core
+
+inline bool operator==(const grpc_slice& s1, const grpc_slice& s2) {
+  return grpc_slice_eq(s1, s2);
+}
+
 #endif /* GRPC_CORE_LIB_SLICE_SLICE_INTERNAL_H */

test/core/client_channel/service_config_test.cc

@@ -18,6 +18,8 @@
 
 #include <regex>
 
+#include "absl/strings/str_cat.h"
+
 #include <gtest/gtest.h>
 
 #include <grpc/grpc.h>
@@ -127,10 +129,10 @@ class ErrorParser : public ServiceConfig::Parser {
   static const char* GlobalError() { return "ErrorParser : globalError"; }
 };
 
-void VerifyRegexMatch(grpc_error* error, const std::regex& e) {
+void VerifyRegexMatch(grpc_error* error, const std::regex& regex) {
   std::smatch match;
-  std::string s(grpc_error_string(error));
-  EXPECT_TRUE(std::regex_search(s, match, e));
+  std::string error_str = grpc_error_string(error);
+  EXPECT_TRUE(std::regex_search(error_str, match, regex)) << error_str;
   GRPC_ERROR_UNREF(error);
 }
 
@@ -139,10 +141,10 @@ class ServiceConfigTest : public ::testing::Test {
   void SetUp() override {
     ServiceConfig::Shutdown();
     ServiceConfig::Init();
-    EXPECT_TRUE(
-        ServiceConfig::RegisterParser(absl::make_unique<TestParser1>()) == 0);
-    EXPECT_TRUE(
-        ServiceConfig::RegisterParser(absl::make_unique<TestParser2>()) == 1);
+    EXPECT_EQ(ServiceConfig::RegisterParser(absl::make_unique<TestParser1>()),
+              0);
+    EXPECT_EQ(ServiceConfig::RegisterParser(absl::make_unique<TestParser2>()),
+              1);
   }
 };
 
@@ -150,46 +152,128 @@ TEST_F(ServiceConfigTest, ErrorCheck1) {
   const char* test_json = "";
   grpc_error* error = GRPC_ERROR_NONE;
   auto svc_cfg = ServiceConfig::Create(test_json, &error);
-  gpr_log(GPR_ERROR, "%s", grpc_error_string(error));
-  ASSERT_TRUE(error != GRPC_ERROR_NONE);
-  std::regex e(std::string("JSON parse error"));
-  VerifyRegexMatch(error, e);
+  std::regex regex(std::string("JSON parse error"));
+  VerifyRegexMatch(error, regex);
 }
 
 TEST_F(ServiceConfigTest, BasicTest1) {
   const char* test_json = "{}";
   grpc_error* error = GRPC_ERROR_NONE;
   auto svc_cfg = ServiceConfig::Create(test_json, &error);
-  EXPECT_TRUE(error == GRPC_ERROR_NONE);
+  EXPECT_EQ(error, GRPC_ERROR_NONE) << grpc_error_string(error);
+}
+
+TEST_F(ServiceConfigTest, SkipMethodConfigWithNoNameOrEmptyName) {
+  const char* test_json =
+      "{\"methodConfig\": ["
+      "  {\"method_param\":1},"
+      "  {\"name\":[], \"method_param\":1},"
+      "  {\"name\":[{\"service\":\"TestServ\"}], \"method_param\":2}"
+      "]}";
+  grpc_error* error = GRPC_ERROR_NONE;
+  auto svc_cfg = ServiceConfig::Create(test_json, &error);
+  ASSERT_EQ(error, GRPC_ERROR_NONE) << grpc_error_string(error);
+  const auto* vector_ptr = svc_cfg->GetMethodParsedConfigVector(
+      grpc_slice_from_static_string("/TestServ/TestMethod"));
+  ASSERT_NE(vector_ptr, nullptr);
+  auto parsed_config = ((*vector_ptr)[1]).get();
+  EXPECT_EQ(static_cast<TestParsedConfig1*>(parsed_config)->value(), 2);
+}
+
+TEST_F(ServiceConfigTest, ErrorDuplicateMethodConfigNames) {
+  const char* test_json =
+      "{\"methodConfig\": ["
+      "  {\"name\":[{\"service\":\"TestServ\"}]},"
+      "  {\"name\":[{\"service\":\"TestServ\"}]}"
+      "]}";
+  grpc_error* error = GRPC_ERROR_NONE;
+  auto svc_cfg = ServiceConfig::Create(test_json, &error);
+  std::regex regex(
+      std::string("Service config parsing error.*referenced_errors"
+                  ".*Method Params.*referenced_errors"
+                  ".*methodConfig.*referenced_errors"
+                  ".*multiple method configs with same name"));
+  VerifyRegexMatch(error, regex);
 }
 
-TEST_F(ServiceConfigTest, ErrorNoNames) {
-  const char* test_json = "{\"methodConfig\": [{\"blah\":1}]}";
+TEST_F(ServiceConfigTest, ErrorDuplicateMethodConfigNamesWithNullMethod) {
+  const char* test_json =
+      "{\"methodConfig\": ["
+      "  {\"name\":[{\"service\":\"TestServ\",\"method\":null}]},"
+      "  {\"name\":[{\"service\":\"TestServ\"}]}"
+      "]}";
   grpc_error* error = GRPC_ERROR_NONE;
   auto svc_cfg = ServiceConfig::Create(test_json, &error);
-  gpr_log(GPR_ERROR, "%s", grpc_error_string(error));
-  ASSERT_TRUE(error != GRPC_ERROR_NONE);
-  std::regex e(
-      std::string("(Service config parsing error)(.*)(referenced_errors)"
-                  "(.*)(Method Params)(.*)(referenced_errors)"
-                  "(.*)(methodConfig)(.*)(referenced_errors)"
-                  "(.*)(No names specified)"));
-  VerifyRegexMatch(error, e);
+  std::regex regex(
+      std::string("Service config parsing error.*referenced_errors"
+                  ".*Method Params.*referenced_errors"
+                  ".*methodConfig.*referenced_errors"
+                  ".*multiple method configs with same name"));
+  VerifyRegexMatch(error, regex);
 }
 
-TEST_F(ServiceConfigTest, ErrorNoNamesWithMultipleMethodConfigs) {
+TEST_F(ServiceConfigTest, ErrorDuplicateMethodConfigNamesWithEmptyMethod) {
   const char* test_json =
-      "{\"methodConfig\": [{}, {\"name\":[{\"service\":\"TestServ\"}]}]}";
+      "{\"methodConfig\": ["
+      "  {\"name\":[{\"service\":\"TestServ\",\"method\":\"\"}]},"
+      "  {\"name\":[{\"service\":\"TestServ\"}]}"
+      "]}";
   grpc_error* error = GRPC_ERROR_NONE;
   auto svc_cfg = ServiceConfig::Create(test_json, &error);
-  gpr_log(GPR_ERROR, "%s", grpc_error_string(error));
-  ASSERT_TRUE(error != GRPC_ERROR_NONE);
-  std::regex e(
-      std::string("(Service config parsing error)(.*)(referenced_errors)"
-                  "(.*)(Method Params)(.*)(referenced_errors)"
-                  "(.*)(methodConfig)(.*)(referenced_errors)"
-                  "(.*)(No names specified)"));
-  VerifyRegexMatch(error, e);
+  std::regex regex(
+      std::string("Service config parsing error.*referenced_errors"
+                  ".*Method Params.*referenced_errors"
+                  ".*methodConfig.*referenced_errors"
+                  ".*multiple method configs with same name"));
+  VerifyRegexMatch(error, regex);
+}
+
+TEST_F(ServiceConfigTest, ErrorDuplicateDefaultMethodConfigs) {
+  const char* test_json =
+      "{\"methodConfig\": ["
+      "  {\"name\":[{}]},"
+      "  {\"name\":[{}]}"
+      "]}";
+  grpc_error* error = GRPC_ERROR_NONE;
+  auto svc_cfg = ServiceConfig::Create(test_json, &error);
+  std::regex regex(
+      std::string("Service config parsing error.*referenced_errors"
+                  ".*Method Params.*referenced_errors"
+                  ".*methodConfig.*referenced_errors"
+                  ".*multiple default method configs"));
+  VerifyRegexMatch(error, regex);
+}
+
+TEST_F(ServiceConfigTest, ErrorDuplicateDefaultMethodConfigsWithNullService) {
+  const char* test_json =
+      "{\"methodConfig\": ["
+      "  {\"name\":[{\"service\":null}]},"
+      "  {\"name\":[{}]}"
+      "]}";
+  grpc_error* error = GRPC_ERROR_NONE;
+  auto svc_cfg = ServiceConfig::Create(test_json, &error);
+  std::regex regex(
+      std::string("Service config parsing error.*referenced_errors"
+                  ".*Method Params.*referenced_errors"
+                  ".*methodConfig.*referenced_errors"
+                  ".*multiple default method configs"));
+  VerifyRegexMatch(error, regex);
+}
+
+TEST_F(ServiceConfigTest, ErrorDuplicateDefaultMethodConfigsWithEmptyService) {
+  const char* test_json =
+      "{\"methodConfig\": ["
+      "  {\"name\":[{\"service\":\"\"}]},"
+      "  {\"name\":[{}]}"
+      "]}";
+  grpc_error* error = GRPC_ERROR_NONE;
+  auto svc_cfg = ServiceConfig::Create(test_json, &error);
+  std::regex regex(
+      std::string("Service config parsing error.*referenced_errors"
+                  ".*Method Params.*referenced_errors"
+                  ".*methodConfig.*referenced_errors"
+                  ".*multiple default method configs"));
+  VerifyRegexMatch(error, regex);
 }
 
 TEST_F(ServiceConfigTest, ValidMethodConfig) {
@@ -197,56 +281,52 @@ TEST_F(ServiceConfigTest, ValidMethodConfig) {
       "{\"methodConfig\": [{\"name\":[{\"service\":\"TestServ\"}]}]}";
   grpc_error* error = GRPC_ERROR_NONE;
   auto svc_cfg = ServiceConfig::Create(test_json, &error);
-  EXPECT_TRUE(error == GRPC_ERROR_NONE);
+  EXPECT_EQ(error, GRPC_ERROR_NONE) << grpc_error_string(error);
 }
 
 TEST_F(ServiceConfigTest, Parser1BasicTest1) {
   const char* test_json = "{\"global_param\":5}";
   grpc_error* error = GRPC_ERROR_NONE;
   auto svc_cfg = ServiceConfig::Create(test_json, &error);
-  ASSERT_TRUE(error == GRPC_ERROR_NONE);
-  EXPECT_TRUE(
-      (static_cast<TestParsedConfig1*>(svc_cfg->GetGlobalParsedConfig(0)))
-          ->value() == 5);
-  EXPECT_TRUE(svc_cfg->GetMethodParsedConfigVector(
-                  grpc_slice_from_static_string("/TestServ/TestMethod")) ==
-              nullptr);
+  ASSERT_EQ(error, GRPC_ERROR_NONE) << grpc_error_string(error);
+  EXPECT_EQ((static_cast<TestParsedConfig1*>(svc_cfg->GetGlobalParsedConfig(0)))
+                ->value(),
+            5);
+  EXPECT_EQ(svc_cfg->GetMethodParsedConfigVector(
+                grpc_slice_from_static_string("/TestServ/TestMethod")),
+            nullptr);
 }
 
 TEST_F(ServiceConfigTest, Parser1BasicTest2) {
   const char* test_json = "{\"global_param\":1000}";
   grpc_error* error = GRPC_ERROR_NONE;
   auto svc_cfg = ServiceConfig::Create(test_json, &error);
-  ASSERT_TRUE(error == GRPC_ERROR_NONE);
-  EXPECT_TRUE(
-      (static_cast<TestParsedConfig1*>(svc_cfg->GetGlobalParsedConfig(0)))
-          ->value() == 1000);
+  ASSERT_EQ(error, GRPC_ERROR_NONE) << grpc_error_string(error);
+  EXPECT_EQ((static_cast<TestParsedConfig1*>(svc_cfg->GetGlobalParsedConfig(0)))
+                ->value(),
+            1000);
 }
 
 TEST_F(ServiceConfigTest, Parser1ErrorInvalidType) {
   const char* test_json = "{\"global_param\":\"5\"}";
   grpc_error* error = GRPC_ERROR_NONE;
   auto svc_cfg = ServiceConfig::Create(test_json, &error);
-  gpr_log(GPR_ERROR, "%s", grpc_error_string(error));
-  ASSERT_TRUE(error != GRPC_ERROR_NONE);
-  std::regex e(std::string("(Service config parsing "
-                           "error)(.*)(referenced_errors)(.*)(Global "
-                           "Params)(.*)(referenced_errors)(.*)") +
-               TestParser1::InvalidTypeErrorMessage());
-  VerifyRegexMatch(error, e);
+  std::regex regex(
+      absl::StrCat("Service config parsing error.*referenced_errors.*"
+                   "Global Params.*referenced_errors.*",
+                   TestParser1::InvalidTypeErrorMessage()));
+  VerifyRegexMatch(error, regex);
 }
 
 TEST_F(ServiceConfigTest, Parser1ErrorInvalidValue) {
   const char* test_json = "{\"global_param\":-5}";
   grpc_error* error = GRPC_ERROR_NONE;
   auto svc_cfg = ServiceConfig::Create(test_json, &error);
-  gpr_log(GPR_ERROR, "%s", grpc_error_string(error));
-  ASSERT_TRUE(error != GRPC_ERROR_NONE);
-  std::regex e(std::string("(Service config parsing "
-                           "error)(.*)(referenced_errors)(.*)(Global "
-                           "Params)(.*)(referenced_errors)(.*)") +
-               TestParser1::InvalidValueErrorMessage());
-  VerifyRegexMatch(error, e);
+  std::regex regex(
+      absl::StrCat("Service config parsing error.*referenced_errors.*"
+                   "Global Params.*referenced_errors.*",
+                   TestParser1::InvalidValueErrorMessage()));
+  VerifyRegexMatch(error, regex);
 }
 
 TEST_F(ServiceConfigTest, Parser2BasicTest) {
@@ -255,12 +335,12 @@ TEST_F(ServiceConfigTest, Parser2BasicTest) {
       "\"method_param\":5}]}";
   grpc_error* error = GRPC_ERROR_NONE;
   auto svc_cfg = ServiceConfig::Create(test_json, &error);
-  ASSERT_TRUE(error == GRPC_ERROR_NONE);
+  ASSERT_EQ(error, GRPC_ERROR_NONE) << grpc_error_string(error);
   const auto* vector_ptr = svc_cfg->GetMethodParsedConfigVector(
       grpc_slice_from_static_string("/TestServ/TestMethod"));
-  EXPECT_TRUE(vector_ptr != nullptr);
+  ASSERT_NE(vector_ptr, nullptr);
   auto parsed_config = ((*vector_ptr)[1]).get();
-  EXPECT_TRUE(static_cast<TestParsedConfig1*>(parsed_config)->value() == 5);
+  EXPECT_EQ(static_cast<TestParsedConfig1*>(parsed_config)->value(), 5);
 }
 
 TEST_F(ServiceConfigTest, Parser2ErrorInvalidType) {
@@ -269,14 +349,12 @@ TEST_F(ServiceConfigTest, Parser2ErrorInvalidType) {
       "\"method_param\":\"5\"}]}";
   grpc_error* error = GRPC_ERROR_NONE;
   auto svc_cfg = ServiceConfig::Create(test_json, &error);
-  ASSERT_TRUE(error != GRPC_ERROR_NONE);
-  gpr_log(GPR_ERROR, "%s", grpc_error_string(error));
-  std::regex e(std::string("(Service config parsing "
-                           "error)(.*)(referenced_errors\":\\[)(.*)(Method "
-                           "Params)(.*)(referenced_errors)(.*)(methodConfig)("
-                           ".*)(referenced_errors)(.*)") +
-               TestParser2::InvalidTypeErrorMessage());
-  VerifyRegexMatch(error, e);
+  std::regex regex(
+      absl::StrCat("Service config parsing error.*referenced_errors\":\\[.*"
+                   "Method Params.*referenced_errors.*methodConfig.*"
+                   "referenced_errors.*",
+                   TestParser2::InvalidTypeErrorMessage()));
+  VerifyRegexMatch(error, regex);
 }
 
 TEST_F(ServiceConfigTest, Parser2ErrorInvalidValue) {
@@ -285,14 +363,12 @@ TEST_F(ServiceConfigTest, Parser2ErrorInvalidValue) {
       "\"method_param\":-5}]}";
   grpc_error* error = GRPC_ERROR_NONE;
   auto svc_cfg = ServiceConfig::Create(test_json, &error);
-  ASSERT_TRUE(error != GRPC_ERROR_NONE);
-  gpr_log(GPR_ERROR, "%s", grpc_error_string(error));
-  std::regex e(std::string("(Service config parsing "
-                           "error)(.*)(referenced_errors\":\\[)(.*)(Method "
-                           "Params)(.*)(referenced_errors)()(.*)(methodConfig)("
-                           ".*)(referenced_errors)(.*)") +
-               TestParser2::InvalidValueErrorMessage());
-  VerifyRegexMatch(error, e);
+  std::regex regex(
+      absl::StrCat("Service config parsing error.*referenced_errors\":\\[.*"
+                   "Method Params.*referenced_errors.*methodConfig.*"
+                   "referenced_errors.*",
+                   TestParser2::InvalidValueErrorMessage()));
+  VerifyRegexMatch(error, regex);
 }
 
 // Test parsing with ErrorParsers which always add errors
@@ -301,10 +377,10 @@ class ErroredParsersScopingTest : public ::testing::Test {
   void SetUp() override {
     ServiceConfig::Shutdown();
     ServiceConfig::Init();
-    EXPECT_TRUE(
-        ServiceConfig::RegisterParser(absl::make_unique<ErrorParser>()) == 0);
-    EXPECT_TRUE(
-        ServiceConfig::RegisterParser(absl::make_unique<ErrorParser>()) == 1);
+    EXPECT_EQ(ServiceConfig::RegisterParser(absl::make_unique<ErrorParser>()),
+              0);
+    EXPECT_EQ(ServiceConfig::RegisterParser(absl::make_unique<ErrorParser>()),
+              1);
   }
 };
 
@@ -312,33 +388,24 @@ TEST_F(ErroredParsersScopingTest, GlobalParams) {
   const char* test_json = "{}";
   grpc_error* error = GRPC_ERROR_NONE;
   auto svc_cfg = ServiceConfig::Create(test_json, &error);
-  ASSERT_TRUE(error != GRPC_ERROR_NONE);
-  gpr_log(GPR_ERROR, "%s", grpc_error_string(error));
-  std::regex e(std::string("(Service config parsing "
-                           "error)(.*)(referenced_errors\":\\[)(.*)(Global "
-                           "Params)(.*)(referenced_errors)()(.*)") +
-               ErrorParser::GlobalError() + std::string("(.*)") +
-               ErrorParser::GlobalError());
-  VerifyRegexMatch(error, e);
+  std::regex regex(absl::StrCat(
+      "Service config parsing error.*referenced_errors\":\\[.*"
+      "Global Params.*referenced_errors.*",
+      ErrorParser::GlobalError(), ".*", ErrorParser::GlobalError()));
+  VerifyRegexMatch(error, regex);
 }
 
 TEST_F(ErroredParsersScopingTest, MethodParams) {
   const char* test_json = "{\"methodConfig\": [{}]}";
   grpc_error* error = GRPC_ERROR_NONE;
   auto svc_cfg = ServiceConfig::Create(test_json, &error);
-  ASSERT_TRUE(error != GRPC_ERROR_NONE);
-  gpr_log(GPR_ERROR, "%s", grpc_error_string(error));
-  std::regex e(std::string("(Service config parsing "
-                           "error)(.*)(referenced_errors\":\\[)(.*)(Global "
-                           "Params)(.*)(referenced_errors)()(.*)") +
-               ErrorParser::GlobalError() + std::string("(.*)") +
-               ErrorParser::GlobalError() +
-               std::string("(.*)(Method Params)(.*)(referenced_errors)"
-                           "(.*)(methodConfig)(.*)(referenced_errors)(.*)") +
-               ErrorParser::MethodError() + std::string("(.*)") +
-               ErrorParser::MethodError() +
-               std::string("(.*)(No names specified)"));
-  VerifyRegexMatch(error, e);
+  std::regex regex(absl::StrCat(
+      "Service config parsing error.*referenced_errors\":\\[.*"
+      "Global Params.*referenced_errors.*",
+      ErrorParser::GlobalError(), ".*", ErrorParser::GlobalError(),
+      ".*Method Params.*referenced_errors.*methodConfig.*referenced_errors.*",
+      ErrorParser::MethodError(), ".*", ErrorParser::MethodError()));
+  VerifyRegexMatch(error, regex);
 }
 
 class ClientChannelParserTest : public ::testing::Test {
@@ -346,9 +413,9 @@ class ClientChannelParserTest : public ::testing::Test {
   void SetUp() override {
     ServiceConfig::Shutdown();
     ServiceConfig::Init();
-    EXPECT_TRUE(
+    EXPECT_EQ(
         ServiceConfig::RegisterParser(
-            absl::make_unique<internal::ClientChannelServiceConfigParser>()) ==
+            absl::make_unique<internal::ClientChannelServiceConfigParser>()),
         0);
   }
 };
@@ -357,12 +424,12 @@ TEST_F(ClientChannelParserTest, ValidLoadBalancingConfigPickFirst) {
   const char* test_json = "{\"loadBalancingConfig\": [{\"pick_first\":{}}]}";
   grpc_error* error = GRPC_ERROR_NONE;
   auto svc_cfg = ServiceConfig::Create(test_json, &error);
-  ASSERT_TRUE(error == GRPC_ERROR_NONE);
+  ASSERT_EQ(error, GRPC_ERROR_NONE) << grpc_error_string(error);
   const auto* parsed_config =
       static_cast<grpc_core::internal::ClientChannelGlobalParsedConfig*>(
           svc_cfg->GetGlobalParsedConfig(0));
   auto lb_config = parsed_config->parsed_lb_config();
-  EXPECT_TRUE(strcmp(lb_config->name(), "pick_first") == 0);
+  EXPECT_STREQ(lb_config->name(), "pick_first");
 }
 
 TEST_F(ClientChannelParserTest, ValidLoadBalancingConfigRoundRobin) {
@@ -370,12 +437,12 @@ TEST_F(ClientChannelParserTest, ValidLoadBalancingConfigRoundRobin) {
       "{\"loadBalancingConfig\": [{\"round_robin\":{}}, {}]}";
   grpc_error* error = GRPC_ERROR_NONE;
   auto svc_cfg = ServiceConfig::Create(test_json, &error);
-  ASSERT_TRUE(error == GRPC_ERROR_NONE);
+  ASSERT_EQ(error, GRPC_ERROR_NONE) << grpc_error_string(error);
   auto parsed_config =
       static_cast<grpc_core::internal::ClientChannelGlobalParsedConfig*>(
           svc_cfg->GetGlobalParsedConfig(0));
   auto lb_config = parsed_config->parsed_lb_config();
-  EXPECT_TRUE(strcmp(lb_config->name(), "round_robin") == 0);
+  EXPECT_STREQ(lb_config->name(), "round_robin");
 }
 
 TEST_F(ClientChannelParserTest, ValidLoadBalancingConfigGrpclb) {
@@ -384,12 +451,12 @@ TEST_F(ClientChannelParserTest, ValidLoadBalancingConfigGrpclb) {
       "[{\"grpclb\":{\"childPolicy\":[{\"pick_first\":{}}]}}]}";
   grpc_error* error = GRPC_ERROR_NONE;
   auto svc_cfg = ServiceConfig::Create(test_json, &error);
-  ASSERT_TRUE(error == GRPC_ERROR_NONE);
+  ASSERT_EQ(error, GRPC_ERROR_NONE) << grpc_error_string(error);
   const auto* parsed_config =
       static_cast<grpc_core::internal::ClientChannelGlobalParsedConfig*>(
           svc_cfg->GetGlobalParsedConfig(0));
   auto lb_config = parsed_config->parsed_lb_config();
-  EXPECT_TRUE(strcmp(lb_config->name(), "grpclb") == 0);
+  EXPECT_STREQ(lb_config->name(), "grpclb");
 }
 
 TEST_F(ClientChannelParserTest, ValidLoadBalancingConfigXds) {
@@ -402,105 +469,91 @@ TEST_F(ClientChannelParserTest, ValidLoadBalancingConfigXds) {
       "}";
   grpc_error* error = GRPC_ERROR_NONE;
   auto svc_cfg = ServiceConfig::Create(test_json, &error);
-  gpr_log(GPR_ERROR, "%s", grpc_error_string(error));
-  ASSERT_TRUE(error == GRPC_ERROR_NONE);
+  ASSERT_EQ(error, GRPC_ERROR_NONE) << grpc_error_string(error);
   const auto* parsed_config =
       static_cast<grpc_core::internal::ClientChannelGlobalParsedConfig*>(
           svc_cfg->GetGlobalParsedConfig(0));
   auto lb_config = parsed_config->parsed_lb_config();
-  EXPECT_TRUE(strcmp(lb_config->name(), "xds_experimental") == 0);
+  EXPECT_STREQ(lb_config->name(), "xds_experimental");
 }
 
 TEST_F(ClientChannelParserTest, UnknownLoadBalancingConfig) {
   const char* test_json = "{\"loadBalancingConfig\": [{\"unknown\":{}}]}";
   grpc_error* error = GRPC_ERROR_NONE;
   auto svc_cfg = ServiceConfig::Create(test_json, &error);
-  gpr_log(GPR_ERROR, "%s", grpc_error_string(error));
-  ASSERT_TRUE(error != GRPC_ERROR_NONE);
-  std::regex e(
-      std::string("(Service config parsing error)(.*)(referenced_errors)"
-                  "(.*)(Global Params)(.*)(referenced_errors)"
-                  "(.*)(Client channel global parser)(.*)(referenced_errors)"
-                  "(.*)(field:loadBalancingConfig)(.*)(referenced_errors)"
-                  "(.*)(No known policy)"));
-  VerifyRegexMatch(error, e);
+  std::regex regex(
+      "Service config parsing error.*referenced_errors.*"
+      "Global Params.*referenced_errors.*"
+      "Client channel global parser.*referenced_errors.*"
+      "field:loadBalancingConfig.*referenced_errors.*"
+      "No known policy");
+  VerifyRegexMatch(error, regex);
 }
 
 TEST_F(ClientChannelParserTest, InvalidGrpclbLoadBalancingConfig) {
   const char* test_json =
-      "{\"loadBalancingConfig\": "
-      "[{\"grpclb\":{\"childPolicy\":[{\"unknown\":{}}]}}]}";
+      "{\"loadBalancingConfig\": ["
+      "  {\"grpclb\":{\"childPolicy\":1}},"
+      "  {\"round_robin\":{}}"
+      "]}";
   grpc_error* error = GRPC_ERROR_NONE;
   auto svc_cfg = ServiceConfig::Create(test_json, &error);
-  gpr_log(GPR_ERROR, "%s", grpc_error_string(error));
-  ASSERT_TRUE(error != GRPC_ERROR_NONE);
-  std::regex e(
-      std::string("(Service config parsing error)(.*)(referenced_errors)"
-                  "(.*)(Global Params)(.*)(referenced_errors)"
-                  "(.*)(Client channel global parser)(.*)(referenced_errors)"
-                  "(.*)(field:loadBalancingConfig)(.*)(referenced_errors)"
-                  "(.*)(GrpcLb Parser)(.*)(referenced_errors)"
-                  "(.*)(field:childPolicy)(.*)(referenced_errors)"
-                  "(.*)(No known policy)"));
-  VerifyRegexMatch(error, e);
+  std::regex regex(
+      "Service config parsing error.*referenced_errors.*"
+      "Global Params.*referenced_errors.*"
+      "Client channel global parser.*referenced_errors.*"
+      "field:loadBalancingConfig.*referenced_errors.*"
+      "GrpcLb Parser.*referenced_errors.*"
+      "field:childPolicy.*referenced_errors.*"
+      "type should be array");
+  VerifyRegexMatch(error, regex);
 }
 
 TEST_F(ClientChannelParserTest, ValidLoadBalancingPolicy) {
   const char* test_json = "{\"loadBalancingPolicy\":\"pick_first\"}";
   grpc_error* error = GRPC_ERROR_NONE;
   auto svc_cfg = ServiceConfig::Create(test_json, &error);
-  ASSERT_TRUE(error == GRPC_ERROR_NONE);
+  ASSERT_EQ(error, GRPC_ERROR_NONE) << grpc_error_string(error);
   const auto* parsed_config =
       static_cast<grpc_core::internal::ClientChannelGlobalParsedConfig*>(
           svc_cfg->GetGlobalParsedConfig(0));
-  const auto* lb_policy = parsed_config->parsed_deprecated_lb_policy();
-  ASSERT_TRUE(lb_policy != nullptr);
-  EXPECT_TRUE(strcmp(lb_policy, "pick_first") == 0);
+  EXPECT_EQ(parsed_config->parsed_deprecated_lb_policy(), "pick_first");
 }
 
 TEST_F(ClientChannelParserTest, ValidLoadBalancingPolicyAllCaps) {
   const char* test_json = "{\"loadBalancingPolicy\":\"PICK_FIRST\"}";
   grpc_error* error = GRPC_ERROR_NONE;
   auto svc_cfg = ServiceConfig::Create(test_json, &error);
-  gpr_log(GPR_ERROR, "%s", grpc_error_string(error));
-  ASSERT_TRUE(error == GRPC_ERROR_NONE);
+  ASSERT_EQ(error, GRPC_ERROR_NONE) << grpc_error_string(error);
   const auto* parsed_config =
       static_cast<grpc_core::internal::ClientChannelGlobalParsedConfig*>(
           svc_cfg->GetGlobalParsedConfig(0));
-  const auto* lb_policy = parsed_config->parsed_deprecated_lb_policy();
-  ASSERT_TRUE(lb_policy != nullptr);
-  EXPECT_TRUE(strcmp(lb_policy, "pick_first") == 0);
+  EXPECT_EQ(parsed_config->parsed_deprecated_lb_policy(), "pick_first");
 }
 
 TEST_F(ClientChannelParserTest, UnknownLoadBalancingPolicy) {
   const char* test_json = "{\"loadBalancingPolicy\":\"unknown\"}";
   grpc_error* error = GRPC_ERROR_NONE;
   auto svc_cfg = ServiceConfig::Create(test_json, &error);
-  gpr_log(GPR_ERROR, "%s", grpc_error_string(error));
-  ASSERT_TRUE(error != GRPC_ERROR_NONE);
-  std::regex e(
-      std::string("(Service config parsing "
-                  "error)(.*)(referenced_errors)(.*)(Global "
-                  "Params)(.*)(referenced_errors)(.*)(Client channel global "
-                  "parser)(.*)(referenced_errors)(.*)(field:"
-                  "loadBalancingPolicy error:Unknown lb policy)"));
-  VerifyRegexMatch(error, e);
+  std::regex regex(
+      "Service config parsing error.*referenced_errors.*"
+      "Global Params.*referenced_errors.*"
+      "Client channel global parser.*referenced_errors.*"
+      "field:loadBalancingPolicy error:Unknown lb policy");
+  VerifyRegexMatch(error, regex);
 }
 
 TEST_F(ClientChannelParserTest, LoadBalancingPolicyXdsNotAllowed) {
   const char* test_json = "{\"loadBalancingPolicy\":\"xds_experimental\"}";
   grpc_error* error = GRPC_ERROR_NONE;
   auto svc_cfg = ServiceConfig::Create(test_json, &error);
-  gpr_log(GPR_ERROR, "%s", grpc_error_string(error));
-  ASSERT_TRUE(error != GRPC_ERROR_NONE);
-  std::regex e(
-      std::string("(Service config parsing "
-                  "error)(.*)(referenced_errors)(.*)(Global "
-                  "Params)(.*)(referenced_errors)(.*)(Client channel global "
-                  "parser)(.*)(referenced_errors)(.*)(field:"
-                  "loadBalancingPolicy error:xds_experimental requires a "
-                  "config. Please use loadBalancingConfig instead.)"));
-  VerifyRegexMatch(error, e);
+  std::regex regex(
+      "Service config parsing error.*referenced_errors.*"
+      "Global Params.*referenced_errors.*"
+      "Client channel global parser.*referenced_errors.*"
+      "field:loadBalancingPolicy error:xds_experimental requires "
+      "a config. Please use loadBalancingConfig instead.");
+  VerifyRegexMatch(error, regex);
 }
 
 TEST_F(ClientChannelParserTest, ValidRetryThrottling) {
@@ -513,8 +566,7 @@ TEST_F(ClientChannelParserTest, ValidRetryThrottling) {
       "}";
   grpc_error* error = GRPC_ERROR_NONE;
   auto svc_cfg = ServiceConfig::Create(test_json, &error);
-  gpr_log(GPR_ERROR, "%s", grpc_error_string(error));
-  ASSERT_TRUE(error == GRPC_ERROR_NONE);
+  ASSERT_EQ(error, GRPC_ERROR_NONE) << grpc_error_string(error);
   const auto* parsed_config =
       static_cast<grpc_core::internal::ClientChannelGlobalParsedConfig*>(
           svc_cfg->GetGlobalParsedConfig(0));
@@ -532,16 +584,13 @@ TEST_F(ClientChannelParserTest, RetryThrottlingMissingFields) {
       "}";
   grpc_error* error = GRPC_ERROR_NONE;
   auto svc_cfg = ServiceConfig::Create(test_json, &error);
-  gpr_log(GPR_ERROR, "%s", grpc_error_string(error));
-  ASSERT_TRUE(error != GRPC_ERROR_NONE);
-  std::regex e(
-      std::string("(Service config parsing "
-                  "error)(.*)(referenced_errors)(.*)(Global "
-                  "Params)(.*)(referenced_errors)(.*)(Client channel global "
-                  "parser)(.*)(referenced_errors)(.*)(field:retryThrottling "
-                  "field:maxTokens error:Not found)(.*)(field:retryThrottling "
-                  "field:tokenRatio error:Not found)"));
-  VerifyRegexMatch(error, e);
+  std::regex regex(
+      "Service config parsing error.*referenced_errors.*"
+      "Global Params.*referenced_errors.*"
+      "Client channel global parser.*referenced_errors.*"
+      "field:retryThrottling field:maxTokens error:Not found.*"
+      "field:retryThrottling field:tokenRatio error:Not found");
+  VerifyRegexMatch(error, regex);
 }
 
 TEST_F(ClientChannelParserTest, InvalidRetryThrottlingNegativeMaxTokens) {
@@ -554,15 +603,13 @@ TEST_F(ClientChannelParserTest, InvalidRetryThrottlingNegativeMaxTokens) {
       "}";
   grpc_error* error = GRPC_ERROR_NONE;
   auto svc_cfg = ServiceConfig::Create(test_json, &error);
-  gpr_log(GPR_ERROR, "%s", grpc_error_string(error));
-  ASSERT_TRUE(error != GRPC_ERROR_NONE);
-  std::regex e(
-      std::string("(Service config parsing "
-                  "error)(.*)(referenced_errors)(.*)(Global "
-                  "Params)(.*)(referenced_errors)(.*)(Client channel global "
-                  "parser)(.*)(referenced_errors)(.*)(field:retryThrottling "
-                  "field:maxTokens error:should be greater than zero)"));
-  VerifyRegexMatch(error, e);
+  std::regex regex(
+      "Service config parsing error.*referenced_errors.*"
+      "Global Params.*referenced_errors.*"
+      "Client channel global parser.*referenced_errors.*"
+      "field:retryThrottling field:maxTokens error:should "
+      "be greater than zero");
+  VerifyRegexMatch(error, regex);
 }
 
 TEST_F(ClientChannelParserTest, InvalidRetryThrottlingInvalidTokenRatio) {
@@ -575,15 +622,13 @@ TEST_F(ClientChannelParserTest, InvalidRetryThrottlingInvalidTokenRatio) {
       "}";
   grpc_error* error = GRPC_ERROR_NONE;
   auto svc_cfg = ServiceConfig::Create(test_json, &error);
-  gpr_log(GPR_ERROR, "%s", grpc_error_string(error));
-  ASSERT_TRUE(error != GRPC_ERROR_NONE);
-  std::regex e(
-      std::string("(Service config parsing "
-                  "error)(.*)(referenced_errors)(.*)(Global "
-                  "Params)(.*)(referenced_errors)(.*)(Client channel global "
-                  "parser)(.*)(referenced_errors)(.*)(field:retryThrottling "
-                  "field:tokenRatio error:Failed parsing)"));
-  VerifyRegexMatch(error, e);
+  std::regex regex(
+      "Service config parsing error.*referenced_errors.*"
+      "Global Params.*referenced_errors.*"
+      "Client channel global parser.*referenced_errors.*"
+      "field:retryThrottling field:tokenRatio "
+      "error:Failed parsing");
+  VerifyRegexMatch(error, regex);
 }
 
 TEST_F(ClientChannelParserTest, ValidTimeout) {
@@ -598,10 +643,10 @@ TEST_F(ClientChannelParserTest, ValidTimeout) {
       "}";
   grpc_error* error = GRPC_ERROR_NONE;
   auto svc_cfg = ServiceConfig::Create(test_json, &error);
-  ASSERT_TRUE(error == GRPC_ERROR_NONE);
+  ASSERT_EQ(error, GRPC_ERROR_NONE) << grpc_error_string(error);
   const auto* vector_ptr = svc_cfg->GetMethodParsedConfigVector(
       grpc_slice_from_static_string("/TestServ/TestMethod"));
-  EXPECT_TRUE(vector_ptr != nullptr);
+  ASSERT_NE(vector_ptr, nullptr);
   auto parsed_config = ((*vector_ptr)[0]).get();
   EXPECT_EQ((static_cast<grpc_core::internal::ClientChannelMethodParsedConfig*>(
                  parsed_config))
@@ -621,16 +666,13 @@ TEST_F(ClientChannelParserTest, InvalidTimeout) {
       "}";
   grpc_error* error = GRPC_ERROR_NONE;
   auto svc_cfg = ServiceConfig::Create(test_json, &error);
-  gpr_log(GPR_ERROR, "%s", grpc_error_string(error));
-  ASSERT_TRUE(error != GRPC_ERROR_NONE);
-  std::regex e(
-      std::string("(Service config parsing "
-                  "error)(.*)(referenced_errors)(.*)(Method "
-                  "Params)(.*)(referenced_errors)(.*)(methodConfig)(.*)("
-                  "referenced_errors)(.*)(Client channel "
-                  "parser)(.*)(referenced_errors)(.*)(field:timeout "
-                  "error:Failed parsing)"));
-  VerifyRegexMatch(error, e);
+  std::regex regex(
+      "Service config parsing error.*referenced_errors.*"
+      "Method Params.*referenced_errors.*"
+      "methodConfig.*referenced_errors.*"
+      "Client channel parser.*referenced_errors.*"
+      "field:timeout error:Failed parsing");
+  VerifyRegexMatch(error, regex);
 }
 
 TEST_F(ClientChannelParserTest, ValidWaitForReady) {
@@ -645,12 +687,12 @@ TEST_F(ClientChannelParserTest, ValidWaitForReady) {
       "}";
   grpc_error* error = GRPC_ERROR_NONE;
   auto svc_cfg = ServiceConfig::Create(test_json, &error);
-  ASSERT_TRUE(error == GRPC_ERROR_NONE);
+  ASSERT_EQ(error, GRPC_ERROR_NONE) << grpc_error_string(error);
   const auto* vector_ptr = svc_cfg->GetMethodParsedConfigVector(
       grpc_slice_from_static_string("/TestServ/TestMethod"));
-  EXPECT_TRUE(vector_ptr != nullptr);
+  ASSERT_NE(vector_ptr, nullptr);
   auto parsed_config = ((*vector_ptr)[0]).get();
-  EXPECT_TRUE(
+  ASSERT_TRUE(
       (static_cast<grpc_core::internal::ClientChannelMethodParsedConfig*>(
            parsed_config))
           ->wait_for_ready()
@@ -674,16 +716,13 @@ TEST_F(ClientChannelParserTest, InvalidWaitForReady) {
       "}";
   grpc_error* error = GRPC_ERROR_NONE;
   auto svc_cfg = ServiceConfig::Create(test_json, &error);
-  gpr_log(GPR_ERROR, "%s", grpc_error_string(error));
-  ASSERT_TRUE(error != GRPC_ERROR_NONE);
-  std::regex e(
-      std::string("(Service config parsing "
-                  "error)(.*)(referenced_errors)(.*)(Method "
-                  "Params)(.*)(referenced_errors)(.*)(methodConfig)(.*)("
-                  "referenced_errors)(.*)(Client channel "
-                  "parser)(.*)(referenced_errors)(.*)(field:waitForReady "
-                  "error:Type should be true/false)"));
-  VerifyRegexMatch(error, e);
+  std::regex regex(
+      "Service config parsing error.*referenced_errors.*"
+      "Method Params.*referenced_errors.*"
+      "methodConfig.*referenced_errors.*"
+      "Client channel parser.*referenced_errors.*"
+      "field:waitForReady error:Type should be true/false");
+  VerifyRegexMatch(error, regex);
 }
 
 TEST_F(ClientChannelParserTest, ValidRetryPolicy) {
@@ -704,15 +743,14 @@ TEST_F(ClientChannelParserTest, ValidRetryPolicy) {
       "}";
   grpc_error* error = GRPC_ERROR_NONE;
   auto svc_cfg = ServiceConfig::Create(test_json, &error);
-  gpr_log(GPR_ERROR, "%s", grpc_error_string(error));
-  ASSERT_TRUE(error == GRPC_ERROR_NONE);
+  ASSERT_EQ(error, GRPC_ERROR_NONE) << grpc_error_string(error);
   const auto* vector_ptr = svc_cfg->GetMethodParsedConfigVector(
       grpc_slice_from_static_string("/TestServ/TestMethod"));
-  EXPECT_TRUE(vector_ptr != nullptr);
+  ASSERT_NE(vector_ptr, nullptr);
   const auto* parsed_config =
       static_cast<grpc_core::internal::ClientChannelMethodParsedConfig*>(
           ((*vector_ptr)[0]).get());
-  EXPECT_TRUE(parsed_config->retry_policy() != nullptr);
+  ASSERT_NE(parsed_config->retry_policy(), nullptr);
   EXPECT_EQ(parsed_config->retry_policy()->max_attempts, 3);
   EXPECT_EQ(parsed_config->retry_policy()->initial_backoff, 1000);
   EXPECT_EQ(parsed_config->retry_policy()->max_backoff, 120000);
@@ -739,16 +777,14 @@ TEST_F(ClientChannelParserTest, InvalidRetryPolicyMaxAttempts) {
       "}";
   grpc_error* error = GRPC_ERROR_NONE;
   auto svc_cfg = ServiceConfig::Create(test_json, &error);
-  gpr_log(GPR_ERROR, "%s", grpc_error_string(error));
-  ASSERT_TRUE(error != GRPC_ERROR_NONE);
-  std::regex e(std::string(
-      "(Service config parsing "
-      "error)(.*)(referenced_errors)(.*)(Method "
-      "Params)(.*)(referenced_errors)(.*)(methodConfig)(.*)(referenced_errors)("
-      ".*)(Client channel "
-      "parser)(.*)(referenced_errors)(.*)(retryPolicy)(.*)(referenced_errors)(."
-      "*)(field:maxAttempts error:should be at least 2)"));
-  VerifyRegexMatch(error, e);
+  std::regex regex(
+      "Service config parsing error.*referenced_errors.*"
+      "Method Params.*referenced_errors.*"
+      "methodConfig.*referenced_errors.*"
+      "Client channel parser.*referenced_errors.*"
+      "retryPolicy.*referenced_errors.*"
+      "field:maxAttempts error:should be at least 2");
+  VerifyRegexMatch(error, regex);
 }
 
 TEST_F(ClientChannelParserTest, InvalidRetryPolicyInitialBackoff) {
@@ -769,16 +805,14 @@ TEST_F(ClientChannelParserTest, InvalidRetryPolicyInitialBackoff) {
       "}";
   grpc_error* error = GRPC_ERROR_NONE;
   auto svc_cfg = ServiceConfig::Create(test_json, &error);
-  gpr_log(GPR_ERROR, "%s", grpc_error_string(error));
-  ASSERT_TRUE(error != GRPC_ERROR_NONE);
-  std::regex e(std::string(
-      "(Service config parsing "
-      "error)(.*)(referenced_errors)(.*)(Method "
-      "Params)(.*)(referenced_errors)(.*)(methodConfig)(.*)(referenced_errors)("
-      ".*)(Client channel "
-      "parser)(.*)(referenced_errors)(.*)(retryPolicy)(.*)(referenced_errors)(."
-      "*)(field:initialBackoff error:Failed to parse)"));
-  VerifyRegexMatch(error, e);
+  std::regex regex(
+      "Service config parsing error.*referenced_errors.*"
+      "Method Params.*referenced_errors.*"
+      "methodConfig.*referenced_errors.*"
+      "Client channel parser.*referenced_errors.*"
+      "retryPolicy.*referenced_errors.*"
+      "field:initialBackoff error:Failed to parse");
+  VerifyRegexMatch(error, regex);
 }
 
 TEST_F(ClientChannelParserTest, InvalidRetryPolicyMaxBackoff) {
@@ -799,16 +833,14 @@ TEST_F(ClientChannelParserTest, InvalidRetryPolicyMaxBackoff) {
       "}";
   grpc_error* error = GRPC_ERROR_NONE;
   auto svc_cfg = ServiceConfig::Create(test_json, &error);
-  gpr_log(GPR_ERROR, "%s", grpc_error_string(error));
-  ASSERT_TRUE(error != GRPC_ERROR_NONE);
-  std::regex e(std::string(
-      "(Service config parsing "
-      "error)(.*)(referenced_errors)(.*)(Method "
-      "Params)(.*)(referenced_errors)(.*)(methodConfig)(.*)(referenced_errors)("
-      ".*)(Client channel "
-      "parser)(.*)(referenced_errors)(.*)(retryPolicy)(.*)(referenced_errors)(."
-      "*)(field:maxBackoff error:failed to parse)"));
-  VerifyRegexMatch(error, e);
+  std::regex regex(
+      "Service config parsing error.*referenced_errors.*"
+      "Method Params.*referenced_errors.*"
+      "methodConfig.*referenced_errors.*"
+      "Client channel parser.*referenced_errors.*"
+      "retryPolicy.*referenced_errors.*"
+      "field:maxBackoff error:failed to parse");
+  VerifyRegexMatch(error, regex);
 }
 
 TEST_F(ClientChannelParserTest, InvalidRetryPolicyBackoffMultiplier) {
@@ -829,16 +861,14 @@ TEST_F(ClientChannelParserTest, InvalidRetryPolicyBackoffMultiplier) {
       "}";
   grpc_error* error = GRPC_ERROR_NONE;
   auto svc_cfg = ServiceConfig::Create(test_json, &error);
-  gpr_log(GPR_ERROR, "%s", grpc_error_string(error));
-  ASSERT_TRUE(error != GRPC_ERROR_NONE);
-  std::regex e(std::string(
-      "(Service config parsing "
-      "error)(.*)(referenced_errors)(.*)(Method "
-      "Params)(.*)(referenced_errors)(.*)(methodConfig)(.*)(referenced_errors)("
-      ".*)(Client channel "
-      "parser)(.*)(referenced_errors)(.*)(retryPolicy)(.*)(referenced_errors)(."
-      "*)(field:backoffMultiplier error:should be of type number)"));
-  VerifyRegexMatch(error, e);
+  std::regex regex(
+      "Service config parsing error.*referenced_errors.*"
+      "Method Params.*referenced_errors.*"
+      "methodConfig.*referenced_errors.*"
+      "Client channel parser.*referenced_errors.*"
+      "retryPolicy.*referenced_errors.*"
+      "field:backoffMultiplier error:should be of type number");
+  VerifyRegexMatch(error, regex);
 }
 
 TEST_F(ClientChannelParserTest, InvalidRetryPolicyRetryableStatusCodes) {
@@ -859,16 +889,14 @@ TEST_F(ClientChannelParserTest, InvalidRetryPolicyRetryableStatusCodes) {
       "}";
   grpc_error* error = GRPC_ERROR_NONE;
   auto svc_cfg = ServiceConfig::Create(test_json, &error);
-  gpr_log(GPR_ERROR, "%s", grpc_error_string(error));
-  ASSERT_TRUE(error != GRPC_ERROR_NONE);
-  std::regex e(std::string(
-      "(Service config parsing "
-      "error)(.*)(referenced_errors)(.*)(Method "
-      "Params)(.*)(referenced_errors)(.*)(methodConfig)(.*)(referenced_errors)("
-      ".*)(Client channel "
-      "parser)(.*)(referenced_errors)(.*)(retryPolicy)(.*)(referenced_errors)(."
-      "*)(field:retryableStatusCodes error:should be non-empty)"));
-  VerifyRegexMatch(error, e);
+  std::regex regex(
+      "Service config parsing error.*referenced_errors.*"
+      "Method Params.*referenced_errors.*"
+      "methodConfig.*referenced_errors.*"
+      "Client channel parser.*referenced_errors.*"
+      "retryPolicy.*referenced_errors.*"
+      "field:retryableStatusCodes error:should be non-empty");
+  VerifyRegexMatch(error, regex);
 }
 
 TEST_F(ClientChannelParserTest, ValidHealthCheck) {
@@ -880,14 +908,13 @@ TEST_F(ClientChannelParserTest, ValidHealthCheck) {
       "}";
   grpc_error* error = GRPC_ERROR_NONE;
   auto svc_cfg = ServiceConfig::Create(test_json, &error);
-  ASSERT_TRUE(error == GRPC_ERROR_NONE);
+  ASSERT_EQ(error, GRPC_ERROR_NONE) << grpc_error_string(error);
   const auto* parsed_config =
       static_cast<grpc_core::internal::ClientChannelGlobalParsedConfig*>(
           svc_cfg->GetGlobalParsedConfig(0));
-  ASSERT_TRUE(parsed_config != nullptr);
-  EXPECT_EQ(strcmp(parsed_config->health_check_service_name(),
-                   "health_check_service_name"),
-            0);
+  ASSERT_NE(parsed_config, nullptr);
+  EXPECT_STREQ(parsed_config->health_check_service_name(),
+               "health_check_service_name");
 }
 
 TEST_F(ClientChannelParserTest, InvalidHealthCheckMultipleEntries) {
@@ -902,12 +929,10 @@ TEST_F(ClientChannelParserTest, InvalidHealthCheckMultipleEntries) {
       "}";
   grpc_error* error = GRPC_ERROR_NONE;
   auto svc_cfg = ServiceConfig::Create(test_json, &error);
-  gpr_log(GPR_ERROR, "%s", grpc_error_string(error));
-  ASSERT_TRUE(error != GRPC_ERROR_NONE);
-  std::regex e(
-      std::string("(JSON parsing failed)(.*)(referenced_errors)"
-                  "(.*)(duplicate key \"healthCheckConfig\" at index 104)"));
-  VerifyRegexMatch(error, e);
+  std::regex regex(
+      "JSON parsing failed.*referenced_errors.*"
+      "duplicate key \"healthCheckConfig\" at index 104");
+  VerifyRegexMatch(error, regex);
 }
 
 class MessageSizeParserTest : public ::testing::Test {
@@ -915,8 +940,9 @@ class MessageSizeParserTest : public ::testing::Test {
   void SetUp() override {
     ServiceConfig::Shutdown();
     ServiceConfig::Init();
-    EXPECT_TRUE(ServiceConfig::RegisterParser(
-                    absl::make_unique<MessageSizeParser>()) == 0);
+    EXPECT_EQ(
+        ServiceConfig::RegisterParser(absl::make_unique<MessageSizeParser>()),
+        0);
   }
 };
 
@@ -933,14 +959,13 @@ TEST_F(MessageSizeParserTest, Valid) {
       "}";
   grpc_error* error = GRPC_ERROR_NONE;
   auto svc_cfg = ServiceConfig::Create(test_json, &error);
-  gpr_log(GPR_ERROR, "%s", grpc_error_string(error));
-  ASSERT_TRUE(error == GRPC_ERROR_NONE);
+  ASSERT_EQ(error, GRPC_ERROR_NONE) << grpc_error_string(error);
   const auto* vector_ptr = svc_cfg->GetMethodParsedConfigVector(
       grpc_slice_from_static_string("/TestServ/TestMethod"));
-  EXPECT_TRUE(vector_ptr != nullptr);
+  ASSERT_NE(vector_ptr, nullptr);
   auto parsed_config =
       static_cast<MessageSizeParsedConfig*>(((*vector_ptr)[0]).get());
-  ASSERT_TRUE(parsed_config != nullptr);
+  ASSERT_NE(parsed_config, nullptr);
   EXPECT_EQ(parsed_config->limits().max_send_size, 1024);
   EXPECT_EQ(parsed_config->limits().max_recv_size, 1024);
 }
@@ -957,16 +982,13 @@ TEST_F(MessageSizeParserTest, InvalidMaxRequestMessageBytes) {
       "}";
   grpc_error* error = GRPC_ERROR_NONE;
   auto svc_cfg = ServiceConfig::Create(test_json, &error);
-  gpr_log(GPR_ERROR, "%s", grpc_error_string(error));
-  ASSERT_TRUE(error != GRPC_ERROR_NONE);
-  std::regex e(
-      std::string("(Service config parsing "
-                  "error)(.*)(referenced_errors)(.*)(Method "
-                  "Params)(.*)(referenced_errors)(.*)(methodConfig)(.*)("
-                  "referenced_errors)(.*)(Message size "
-                  "parser)(.*)(referenced_errors)(.*)(field:"
-                  "maxRequestMessageBytes error:should be non-negative)"));
-  VerifyRegexMatch(error, e);
+  std::regex regex(
+      "Service config parsing error.*referenced_errors.*"
+      "Method Params.*referenced_errors.*"
+      "methodConfig.*referenced_errors.*"
+      "Message size parser.*referenced_errors.*"
+      "field:maxRequestMessageBytes error:should be non-negative");
+  VerifyRegexMatch(error, regex);
 }
 
 TEST_F(MessageSizeParserTest, InvalidMaxResponseMessageBytes) {
@@ -981,16 +1003,14 @@ TEST_F(MessageSizeParserTest, InvalidMaxResponseMessageBytes) {
       "}";
   grpc_error* error = GRPC_ERROR_NONE;
   auto svc_cfg = ServiceConfig::Create(test_json, &error);
-  gpr_log(GPR_ERROR, "%s", grpc_error_string(error));
-  ASSERT_TRUE(error != GRPC_ERROR_NONE);
-  std::regex e(
-      std::string("(Service config parsing "
-                  "error)(.*)(referenced_errors)(.*)(Method "
-                  "Params)(.*)(referenced_errors)(.*)(methodConfig)(.*)("
-                  "referenced_errors)(.*)(Message size "
-                  "parser)(.*)(referenced_errors)(.*)(field:"
-                  "maxResponseMessageBytes error:should be of type number)"));
-  VerifyRegexMatch(error, e);
+  std::regex regex(
+      "Service config parsing error.*referenced_errors.*"
+      "Method Params.*referenced_errors.*"
+      "methodConfig.*referenced_errors.*"
+      "Message size parser.*referenced_errors.*"
+      "field:maxResponseMessageBytes error:should be of type "
+      "number");
+  VerifyRegexMatch(error, regex);
 }
 
 }  // namespace testing

test/cpp/naming/resolver_component_tests_runner.py

@@ -331,7 +331,7 @@ current_test_subprocess = subprocess.Popen([
   args.test_bin_path,
   '--target_name', 'ipv4-config-causing-fallback-to-tcp.resolver-tests-version-4.grpctestingexp.',
   '--expected_addrs', '1.2.3.4:443,False',
-  '--expected_chosen_service_config', '{"loadBalancingPolicy":"round_robin","methodConfig":[{"name":[{"method":"Foo","service":"SimpleService"}],"waitForReady":true},{"name":[{"method":"FooTwo","service":"SimpleService"}],"waitForReady":true},{"name":[{"method":"FooThree","service":"SimpleService"}],"waitForReady":true},{"name":[{"method":"FooFour","service":"SimpleService"}],"waitForReady":true},{"name":[{"method":"FooFive","service":"SimpleService"}],"waitForReady":true},{"name":[{"method":"FooSix","service":"SimpleService"}],"waitForReady":true},{"name":[{"method":"FooSeven","service":"SimpleService"}],"waitForReady":true},{"name":[{"method":"FooEight","service":"SimpleService"}],"waitForReady":true},{"name":[{"method":"FooNine","service":"SimpleService"}],"waitForReady":true},{"name":[{"method":"FooTen","service":"SimpleService"}],"waitForReady":true},{"name":[{"method":"FooEleven","service":"SimpleService"}],"waitForReady":true},{"name":[{"method":"FooTwelve","service":"SimpleService"}],"waitForReady":true},{"name":[{"method":"FooTwelve","service":"SimpleService"}],"waitForReady":true},{"name":[{"method":"FooTwelve","service":"SimpleService"}],"waitForReady":true},{"name":[{"method":"FooTwelve","service":"SimpleService"}],"waitForReady":true}]}',
+  '--expected_chosen_service_config', '{"loadBalancingPolicy":"round_robin","methodConfig":[{"name":[{"method":"Foo","service":"SimpleService"}],"waitForReady":true},{"name":[{"method":"FooTwo","service":"SimpleService"}],"waitForReady":true},{"name":[{"method":"FooThree","service":"SimpleService"}],"waitForReady":true},{"name":[{"method":"FooFour","service":"SimpleService"}],"waitForReady":true},{"name":[{"method":"FooFive","service":"SimpleService"}],"waitForReady":true},{"name":[{"method":"FooSix","service":"SimpleService"}],"waitForReady":true},{"name":[{"method":"FooSeven","service":"SimpleService"}],"waitForReady":true},{"name":[{"method":"FooEight","service":"SimpleService"}],"waitForReady":true},{"name":[{"method":"FooNine","service":"SimpleService"}],"waitForReady":true},{"name":[{"method":"FooTen","service":"SimpleService"}],"waitForReady":true},{"name":[{"method":"FooEleven","service":"SimpleService"}],"waitForReady":true},{"name":[{"method":"FooTwelve","service":"SimpleService"}],"waitForReady":true},{"name":[{"method":"FooThirteen","service":"SimpleService"}],"waitForReady":true},{"name":[{"method":"FooFourteen","service":"SimpleService"}],"waitForReady":true},{"name":[{"method":"FooFifteen","service":"SimpleService"}],"waitForReady":true}]}',
   '--expected_service_config_error', '',
   '--expected_lb_policy', '',
   '--enable_srv_queries', 'True',

test/cpp/naming/resolver_test_record_groups.yaml

@@ -205,7 +205,7 @@ resolver_component_tests:
     - {TTL: '2100', data: '2607:f8b0:400a:801::1002', type: AAAA}
 - expected_addrs:
   - {address: '1.2.3.4:443', is_balancer: false}
-  expected_chosen_service_config: '{"loadBalancingPolicy":"round_robin","methodConfig":[{"name":[{"method":"Foo","service":"SimpleService"}],"waitForReady":true},{"name":[{"method":"FooTwo","service":"SimpleService"}],"waitForReady":true},{"name":[{"method":"FooThree","service":"SimpleService"}],"waitForReady":true},{"name":[{"method":"FooFour","service":"SimpleService"}],"waitForReady":true},{"name":[{"method":"FooFive","service":"SimpleService"}],"waitForReady":true},{"name":[{"method":"FooSix","service":"SimpleService"}],"waitForReady":true},{"name":[{"method":"FooSeven","service":"SimpleService"}],"waitForReady":true},{"name":[{"method":"FooEight","service":"SimpleService"}],"waitForReady":true},{"name":[{"method":"FooNine","service":"SimpleService"}],"waitForReady":true},{"name":[{"method":"FooTen","service":"SimpleService"}],"waitForReady":true},{"name":[{"method":"FooEleven","service":"SimpleService"}],"waitForReady":true},{"name":[{"method":"FooTwelve","service":"SimpleService"}],"waitForReady":true},{"name":[{"method":"FooTwelve","service":"SimpleService"}],"waitForReady":true},{"name":[{"method":"FooTwelve","service":"SimpleService"}],"waitForReady":true},{"name":[{"method":"FooTwelve","service":"SimpleService"}],"waitForReady":true}]}'
+  expected_chosen_service_config: '{"loadBalancingPolicy":"round_robin","methodConfig":[{"name":[{"method":"Foo","service":"SimpleService"}],"waitForReady":true},{"name":[{"method":"FooTwo","service":"SimpleService"}],"waitForReady":true},{"name":[{"method":"FooThree","service":"SimpleService"}],"waitForReady":true},{"name":[{"method":"FooFour","service":"SimpleService"}],"waitForReady":true},{"name":[{"method":"FooFive","service":"SimpleService"}],"waitForReady":true},{"name":[{"method":"FooSix","service":"SimpleService"}],"waitForReady":true},{"name":[{"method":"FooSeven","service":"SimpleService"}],"waitForReady":true},{"name":[{"method":"FooEight","service":"SimpleService"}],"waitForReady":true},{"name":[{"method":"FooNine","service":"SimpleService"}],"waitForReady":true},{"name":[{"method":"FooTen","service":"SimpleService"}],"waitForReady":true},{"name":[{"method":"FooEleven","service":"SimpleService"}],"waitForReady":true},{"name":[{"method":"FooTwelve","service":"SimpleService"}],"waitForReady":true},{"name":[{"method":"FooThirteen","service":"SimpleService"}],"waitForReady":true},{"name":[{"method":"FooFourteen","service":"SimpleService"}],"waitForReady":true},{"name":[{"method":"FooFifteen","service":"SimpleService"}],"waitForReady":true}]}'
   expected_service_config_error: null
   expected_lb_policy: null
   enable_srv_queries: true
@@ -216,7 +216,7 @@ resolver_component_tests:
     ipv4-config-causing-fallback-to-tcp:
     - {TTL: '2100', data: 1.2.3.4, type: A}
     _grpc_config.ipv4-config-causing-fallback-to-tcp:
-    - {TTL: '2100', data: 'grpc_config=[{"serviceConfig":{"loadBalancingPolicy":"round_robin","methodConfig":[{"name":[{"method":"Foo","service":"SimpleService"}],"waitForReady":true},{"name":[{"method":"FooTwo","service":"SimpleService"}],"waitForReady":true},{"name":[{"method":"FooThree","service":"SimpleService"}],"waitForReady":true},{"name":[{"method":"FooFour","service":"SimpleService"}],"waitForReady":true},{"name":[{"method":"FooFive","service":"SimpleService"}],"waitForReady":true},{"name":[{"method":"FooSix","service":"SimpleService"}],"waitForReady":true},{"name":[{"method":"FooSeven","service":"SimpleService"}],"waitForReady":true},{"name":[{"method":"FooEight","service":"SimpleService"}],"waitForReady":true},{"name":[{"method":"FooNine","service":"SimpleService"}],"waitForReady":true},{"name":[{"method":"FooTen","service":"SimpleService"}],"waitForReady":true},{"name":[{"method":"FooEleven","service":"SimpleService"}],"waitForReady":true},{"name":[{"method":"FooTwelve","service":"SimpleService"}],"waitForReady":true},{"name":[{"method":"FooTwelve","service":"SimpleService"}],"waitForReady":true},{"name":[{"method":"FooTwelve","service":"SimpleService"}],"waitForReady":true},{"name":[{"method":"FooTwelve","service":"SimpleService"}],"waitForReady":true}]}}]',
+    - {TTL: '2100', data: 'grpc_config=[{"serviceConfig":{"loadBalancingPolicy":"round_robin","methodConfig":[{"name":[{"method":"Foo","service":"SimpleService"}],"waitForReady":true},{"name":[{"method":"FooTwo","service":"SimpleService"}],"waitForReady":true},{"name":[{"method":"FooThree","service":"SimpleService"}],"waitForReady":true},{"name":[{"method":"FooFour","service":"SimpleService"}],"waitForReady":true},{"name":[{"method":"FooFive","service":"SimpleService"}],"waitForReady":true},{"name":[{"method":"FooSix","service":"SimpleService"}],"waitForReady":true},{"name":[{"method":"FooSeven","service":"SimpleService"}],"waitForReady":true},{"name":[{"method":"FooEight","service":"SimpleService"}],"waitForReady":true},{"name":[{"method":"FooNine","service":"SimpleService"}],"waitForReady":true},{"name":[{"method":"FooTen","service":"SimpleService"}],"waitForReady":true},{"name":[{"method":"FooEleven","service":"SimpleService"}],"waitForReady":true},{"name":[{"method":"FooTwelve","service":"SimpleService"}],"waitForReady":true},{"name":[{"method":"FooThirteen","service":"SimpleService"}],"waitForReady":true},{"name":[{"method":"FooFourteen","service":"SimpleService"}],"waitForReady":true},{"name":[{"method":"FooFifteen","service":"SimpleService"}],"waitForReady":true}]}}]',
       type: TXT}
 # Tests for which we don't enable SRV queries
 - expected_addrs: