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diff --git a/Firestore/core/test/firebase/firestore/util/type_traits_apple_test.mm b/Firestore/core/test/firebase/firestore/util/type_traits_apple_test.mm
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+++ b/Firestore/core/test/firebase/firestore/util/type_traits_apple_test.mm
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+/*
+ * Copyright 2018 Google
+ *
+ * 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 "Firestore/core/src/firebase/firestore/util/type_traits.h"
+
+#import <Foundation/NSArray.h>
+#import <Foundation/NSObject.h>
+#import <Foundation/NSString.h>
+
+#include "gtest/gtest.h"
+
+namespace firebase {
+namespace firestore {
+namespace util {
+
+TEST(TypeTraitsTest, IsObjectiveCPointer) {
+  static_assert(is_objective_c_pointer<NSObject*>{}, "NSObject");
+  static_assert(is_objective_c_pointer<NSString*>{}, "NSString");
+  static_assert(is_objective_c_pointer<NSArray<NSString*>*>{},
+                "NSArray<NSString*>");
+
+  static_assert(is_objective_c_pointer<id>{}, "id");
+  static_assert(is_objective_c_pointer<id<NSCopying>>{}, "id<NSCopying>");
+
+  static_assert(!is_objective_c_pointer<int*>{}, "int*");
+  static_assert(!is_objective_c_pointer<void*>{}, "void*");
+  static_assert(!is_objective_c_pointer<int>{}, "int");
+  static_assert(!is_objective_c_pointer<void>{}, "void");
+
+  struct Foo {};
+  static_assert(!is_objective_c_pointer<Foo>{}, "Foo");
+  static_assert(!is_objective_c_pointer<Foo*>{}, "Foo");
+}
+
+}  // namespace util
+}  // namespace firestore
+}  // namespace firebase