Add test for static elements

test/core/transport/BUILD

@@ -82,6 +82,20 @@ grpc_cc_test(
     ],
 )
 
+grpc_cc_test(
+    name = "static_metadata_test",
+    srcs = ["static_metadata_test.cc"],
+    external_deps = [
+        "gtest",
+    ],
+    language = "C++",
+    deps = [
+        "//:gpr",
+        "//:grpc",
+        "//test/core/util:grpc_test_util",
+    ],
+)
+
 grpc_cc_test(
     name = "status_conversion_test",
     srcs = ["status_conversion_test.cc"],

test/core/transport/static_metadata_test.cc

@@ -0,0 +1,51 @@
+/*
+ *
+ * Copyright 2019 gRPC authors.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ *
+ */
+
+#include <gtest/gtest.h>
+
+#include <grpc/grpc.h>
+
+#include "src/core/lib/transport/metadata.h"
+#include "src/core/lib/transport/static_metadata.h"
+#include "test/core/util/test_config.h"
+
+namespace grpc_core {
+namespace {
+
+TEST(StaticMetadataTest, ReadAllStaticElements) {
+  // This makes sure that all static elements are returned when
+  // grpc_mdelem_from_slices is called with key pairs pregenerated.
+  for (int i = 0; i < GRPC_STATIC_MDELEM_COUNT; i++) {
+    const grpc_mdelem mdelem = grpc_static_mdelem_manifested()[i];
+    const grpc_mdelem mdelem2 =
+        grpc_mdelem_from_slices(GRPC_MDKEY(mdelem), GRPC_MDVALUE(mdelem));
+    EXPECT_EQ(mdelem.payload, mdelem2.payload);
+  }
+}
+
+}  // namespace
+}  // namespace grpc_core
+
+int main(int argc, char** argv) {
+  grpc_init();
+  grpc::testing::TestEnvironment env(argc, argv);
+  ::testing::InitGoogleTest(&argc, argv);
+  int retval = RUN_ALL_TESTS();
+  grpc_shutdown();
+  return retval;
+}