add tests for the error messages

test/core/surface/invalid_channel_args_test.c

@@ -0,0 +1,183 @@
+/*
+ *
+ * Copyright 2015, Google Inc.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are
+ * met:
+ *
+ *     * Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ *     * Redistributions in binary form must reproduce the above
+ * copyright notice, this list of conditions and the following disclaimer
+ * in the documentation and/or other materials provided with the
+ * distribution.
+ *     * Neither the name of Google Inc. nor the names of its
+ * contributors may be used to endorse or promote products derived from
+ * this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ */
+
+#include <grpc/grpc.h>
+#include <string.h>
+
+#include <grpc/support/alloc.h>
+#include <grpc/support/log.h>
+#include <grpc/support/string_util.h>
+#include "test/core/util/test_config.h"
+
+static char *g_last_log_error_message = NULL;
+static const char *g_file_name = "channel.c";
+
+static int ends_with(const char *src, const char *suffix) {
+  size_t src_len = strlen(src);
+  size_t suffix_len = strlen(suffix);
+  if (src_len < suffix_len) {
+    return 0;
+  }
+  return strcmp(src + src_len - suffix_len, suffix) == 0;
+}
+
+static void log_error_sink(gpr_log_func_args *args) {
+  if (args->severity == GPR_LOG_SEVERITY_ERROR &&
+      ends_with(args->file, g_file_name)) {
+    g_last_log_error_message = gpr_strdup(args->message);
+  }
+}
+
+static void verify_last_error(const char *message) {
+  if (message == NULL) {
+    GPR_ASSERT(g_last_log_error_message == NULL);
+    return;
+  }
+  GPR_ASSERT(strcmp(message, g_last_log_error_message) == 0);
+  gpr_free(g_last_log_error_message);
+  g_last_log_error_message = NULL;
+}
+
+static char *compose_error_string(const char *key, const char *message) {
+  char *ret;
+  gpr_asprintf(&ret, "%s%s", key, message);
+  return ret;
+}
+
+static void one_test(grpc_channel_args *args, char *expected_error_message) {
+  grpc_channel *chan =
+      grpc_insecure_channel_create("nonexistant:54321", args, NULL);
+  verify_last_error(expected_error_message);
+  gpr_free(expected_error_message);
+  grpc_channel_destroy(chan);
+}
+
+static void test_no_error_message() { one_test(NULL, NULL); }
+
+static void test_max_message_length_type() {
+  grpc_arg client_arg;
+  grpc_channel_args client_args;
+  char *expected_error_message;
+
+  client_arg.type = GRPC_ARG_STRING;
+  client_arg.key = GRPC_ARG_MAX_MESSAGE_LENGTH;
+
+  client_args.num_args = 1;
+  client_args.args = &client_arg;
+  expected_error_message = compose_error_string(
+      GRPC_ARG_MAX_MESSAGE_LENGTH, " ignored: it must be an integer");
+  one_test(&client_args, expected_error_message);
+}
+
+static void test_max_message_length_negative() {
+  grpc_arg client_arg;
+  grpc_channel_args client_args;
+  char *expected_error_message;
+
+  client_arg.type = GRPC_ARG_INTEGER;
+  client_arg.key = GRPC_ARG_MAX_MESSAGE_LENGTH;
+  client_arg.value.integer = -1;
+
+  client_args.num_args = 1;
+  client_args.args = &client_arg;
+  expected_error_message = compose_error_string(GRPC_ARG_MAX_MESSAGE_LENGTH,
+                                                " ignored: it must be >= 0");
+  one_test(&client_args, expected_error_message);
+}
+
+static void test_default_authority_type() {
+  grpc_arg client_arg;
+  grpc_channel_args client_args;
+  char *expected_error_message;
+
+  client_arg.type = GRPC_ARG_INTEGER;
+  client_arg.key = GRPC_ARG_DEFAULT_AUTHORITY;
+
+  client_args.num_args = 1;
+  client_args.args = &client_arg;
+  expected_error_message = compose_error_string(
+      GRPC_ARG_DEFAULT_AUTHORITY, " ignored: it must be a string");
+  one_test(&client_args, expected_error_message);
+}
+
+static void test_ssl_name_override_type() {
+  grpc_arg client_arg;
+  grpc_channel_args client_args;
+  char *expected_error_message;
+
+  client_arg.type = GRPC_ARG_INTEGER;
+  client_arg.key = GRPC_SSL_TARGET_NAME_OVERRIDE_ARG;
+
+  client_args.num_args = 1;
+  client_args.args = &client_arg;
+  expected_error_message = compose_error_string(
+      GRPC_SSL_TARGET_NAME_OVERRIDE_ARG, " ignored: it must be a string");
+  one_test(&client_args, expected_error_message);
+}
+
+static void test_ssl_name_override_failed() {
+  grpc_arg client_arg[2];
+  grpc_channel_args client_args;
+  char *expected_error_message;
+
+  client_arg[0].type = GRPC_ARG_STRING;
+  client_arg[0].key = GRPC_ARG_DEFAULT_AUTHORITY;
+  client_arg[0].value.string = "default";
+  client_arg[1].type = GRPC_ARG_STRING;
+  client_arg[1].key = GRPC_SSL_TARGET_NAME_OVERRIDE_ARG;
+  client_arg[1].value.string = "ssl";
+
+  client_args.num_args = 2;
+  client_args.args = client_arg;
+  expected_error_message =
+      compose_error_string(GRPC_SSL_TARGET_NAME_OVERRIDE_ARG,
+                           " ignored: default host already set some other way");
+  one_test(&client_args, expected_error_message);
+}
+
+int main(int argc, char **argv) {
+  grpc_test_init(argc, argv);
+  grpc_init();
+  gpr_set_log_function(log_error_sink);
+
+  test_no_error_message();
+  test_max_message_length_type();
+  test_max_message_length_negative();
+  test_default_authority_type();
+  test_ssl_name_override_type();
+  test_ssl_name_override_failed();
+
+  grpc_shutdown();
+
+  return 0;
+}