Rename 'gpr++' directories to 'gprpp'.

7 files changed, 716 insertions, 0 deletions

diff --git a/test/core/gprpp/BUILD b/test/core/gprpp/BUILD
new file mode 100644
index 0000000000..1c11e0bdb5
--- /dev/null
+++ b/test/core/gprpp/BUILD
@@ -0,0 +1,96 @@
+# Copyright 2016 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.
+
+load("//bazel:grpc_build_system.bzl", "grpc_cc_library", "grpc_cc_test", "grpc_cc_binary", "grpc_package")
+
+licenses(["notice"])  # Apache v2
+
+grpc_package(name = "test/core/gprpp")
+
+grpc_cc_test(
+    name = "manual_constructor_test",
+    srcs = ["manual_constructor_test.cc"],
+    language = "C++",
+    deps = [
+        "//:gpr",
+        "//:gpr++_base",
+        "//test/core/util:gpr_test_util",
+    ],
+)
+
+grpc_cc_test(
+    name = "memory_test",
+    srcs = ["memory_test.cc"],
+    external_deps = [
+        "gtest",
+    ],
+    language = "C++",
+    deps = [
+        "//:gpr++_base",
+        "//test/core/util:gpr_test_util",
+    ],
+)
+
+grpc_cc_test(
+    name = "inlined_vector_test",
+    srcs = ["inlined_vector_test.cc"],
+    external_deps = [
+        "gtest",
+    ],
+    language = "C++",
+    deps = [
+        "//:inlined_vector",
+        "//test/core/util:gpr_test_util",
+    ],
+)
+
+grpc_cc_test(
+    name = "orphanable_test",
+    srcs = ["orphanable_test.cc"],
+    language = "C++",
+    deps = [
+        "//:orphanable",
+        "//test/core/util:gpr_test_util",
+    ],
+    external_deps = [
+        "gtest",
+    ],
+)
+
+grpc_cc_test(
+    name = "ref_counted_test",
+    srcs = ["ref_counted_test.cc"],
+    language = "C++",
+    deps = [
+        "//:ref_counted",
+        "//test/core/util:gpr_test_util",
+    ],
+    external_deps = [
+        "gtest",
+    ],
+)
+
+grpc_cc_test(
+    name = "ref_counted_ptr_test",
+    srcs = ["ref_counted_ptr_test.cc"],
+    language = "C++",
+    deps = [
+        "//:ref_counted",
+        "//:ref_counted_ptr",
+        "//test/core/util:gpr_test_util",
+    ],
+    external_deps = [
+        "gtest",
+    ],
+)
diff --git a/test/core/gprpp/inlined_vector_test.cc b/test/core/gprpp/inlined_vector_test.cc
new file mode 100644
index 0000000000..0e712dafe4
--- /dev/null
+++ b/test/core/gprpp/inlined_vector_test.cc
@@ -0,0 +1,74 @@
+/*
+ *
+ * Copyright 2017 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 "src/core/lib/gprpp/inlined_vector.h"
+#include <gtest/gtest.h>
+#include "src/core/lib/gprpp/memory.h"
+#include "test/core/util/test_config.h"
+
+namespace grpc_core {
+namespace testing {
+
+TEST(InlinedVectorTest, CreateAndIterate) {
+  const int kNumElements = 9;
+  InlinedVector<int, 2> v;
+  for (int i = 0; i < kNumElements; ++i) {
+    v.push_back(i);
+  }
+  EXPECT_EQ(static_cast<size_t>(kNumElements), v.size());
+  for (int i = 0; i < kNumElements; ++i) {
+    EXPECT_EQ(i, v[i]);
+  }
+}
+
+TEST(InlinedVectorTest, ValuesAreInlined) {
+  const int kNumElements = 5;
+  InlinedVector<int, 10> v;
+  for (int i = 0; i < kNumElements; ++i) {
+    v.push_back(i);
+  }
+  EXPECT_EQ(static_cast<size_t>(kNumElements), v.size());
+  for (int i = 0; i < kNumElements; ++i) {
+    EXPECT_EQ(i, v[i]);
+  }
+}
+
+TEST(InlinedVectorTest, PushBackWithMove) {
+  InlinedVector<UniquePtr<int>, 1> v;
+  UniquePtr<int> i = MakeUnique<int>(3);
+  v.push_back(std::move(i));
+  EXPECT_EQ(nullptr, i.get());
+  EXPECT_EQ(1UL, v.size());
+  EXPECT_EQ(3, *v[0]);
+}
+
+TEST(InlinedVectorTest, EmplaceBack) {
+  InlinedVector<UniquePtr<int>, 1> v;
+  v.emplace_back(New<int>(3));
+  EXPECT_EQ(1UL, v.size());
+  EXPECT_EQ(3, *v[0]);
+}
+
+}  // namespace testing
+}  // namespace grpc_core
+
+int main(int argc, char** argv) {
+  grpc_test_init(argc, argv);
+  ::testing::InitGoogleTest(&argc, argv);
+  return RUN_ALL_TESTS();
+}
diff --git a/test/core/gprpp/manual_constructor_test.cc b/test/core/gprpp/manual_constructor_test.cc
new file mode 100644
index 0000000000..f06c3cab06
--- /dev/null
+++ b/test/core/gprpp/manual_constructor_test.cc
@@ -0,0 +1,99 @@
+/*
+ *
+ * Copyright 2017 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.
+ *
+ */
+
+/* Test of gpr synchronization support. */
+
+#include "src/core/lib/gprpp/manual_constructor.h"
+#include <grpc/support/alloc.h>
+#include <grpc/support/log.h>
+#include <grpc/support/sync.h>
+#include <grpc/support/thd.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <cstring>
+#include "src/core/lib/gprpp/abstract.h"
+#include "test/core/util/test_config.h"
+
+class A {
+ public:
+  A() {}
+  virtual ~A() {}
+  virtual const char* foo() { return "A_foo"; }
+  virtual const char* bar() { return "A_bar"; }
+  GRPC_ABSTRACT_BASE_CLASS
+};
+
+class B : public A {
+ public:
+  B() {}
+  ~B() {}
+  const char* foo() override { return "B_foo"; }
+  char get_junk() { return junk[0]; }
+
+ private:
+  char junk[1000];
+};
+
+class C : public B {
+ public:
+  C() {}
+  ~C() {}
+  virtual const char* bar() { return "C_bar"; }
+  char get_more_junk() { return more_junk[0]; }
+
+ private:
+  char more_junk[1000];
+};
+
+class D : public A {
+ public:
+  virtual const char* bar() { return "D_bar"; }
+};
+
+static void basic_test() {
+  grpc_core::PolymorphicManualConstructor<A, B> poly;
+  poly.Init<B>();
+  GPR_ASSERT(!strcmp(poly->foo(), "B_foo"));
+  GPR_ASSERT(!strcmp(poly->bar(), "A_bar"));
+}
+
+static void complex_test() {
+  grpc_core::PolymorphicManualConstructor<A, B, C, D> polyB;
+  polyB.Init<B>();
+  GPR_ASSERT(!strcmp(polyB->foo(), "B_foo"));
+  GPR_ASSERT(!strcmp(polyB->bar(), "A_bar"));
+
+  grpc_core::PolymorphicManualConstructor<A, B, C, D> polyC;
+  polyC.Init<C>();
+  GPR_ASSERT(!strcmp(polyC->foo(), "B_foo"));
+  GPR_ASSERT(!strcmp(polyC->bar(), "C_bar"));
+
+  grpc_core::PolymorphicManualConstructor<A, B, C, D> polyD;
+  polyD.Init<D>();
+  GPR_ASSERT(!strcmp(polyD->foo(), "A_foo"));
+  GPR_ASSERT(!strcmp(polyD->bar(), "D_bar"));
+}
+
+/* ------------------------------------------------- */
+
+int main(int argc, char* argv[]) {
+  grpc_test_init(argc, argv);
+  basic_test();
+  complex_test();
+  return 0;
+}
diff --git a/test/core/gprpp/memory_test.cc b/test/core/gprpp/memory_test.cc
new file mode 100644
index 0000000000..180c36fad7
--- /dev/null
+++ b/test/core/gprpp/memory_test.cc
@@ -0,0 +1,74 @@
+/*
+ *
+ * Copyright 2017 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 "src/core/lib/gprpp/memory.h"
+#include <gtest/gtest.h>
+#include "test/core/util/test_config.h"
+
+namespace grpc_core {
+namespace testing {
+
+struct Foo {
+  Foo(int p, int q) : a(p), b(q) {}
+  int a;
+  int b;
+};
+
+TEST(MemoryTest, NewDeleteTest) { Delete(New<int>()); }
+
+TEST(MemoryTest, NewDeleteWithArgTest) {
+  int* i = New<int>(42);
+  EXPECT_EQ(42, *i);
+  Delete(i);
+}
+
+TEST(MemoryTest, NewDeleteWithArgsTest) {
+  Foo* p = New<Foo>(1, 2);
+  EXPECT_EQ(1, p->a);
+  EXPECT_EQ(2, p->b);
+  Delete(p);
+}
+
+TEST(MemoryTest, MakeUniqueTest) { MakeUnique<int>(); }
+
+TEST(MemoryTest, MakeUniqueWithArgTest) {
+  auto i = MakeUnique<int>(42);
+  EXPECT_EQ(42, *i);
+}
+
+TEST(MemoryTest, UniquePtrWithCustomDeleter) {
+  int n = 0;
+  class IncrementingDeleter {
+   public:
+    void operator()(int* p) { ++*p; }
+  };
+  {
+    UniquePtr<int, IncrementingDeleter> p(&n);
+    EXPECT_EQ(0, n);
+  }
+  EXPECT_EQ(1, n);
+}
+
+}  // namespace testing
+}  // namespace grpc_core
+
+int main(int argc, char** argv) {
+  grpc_test_init(argc, argv);
+  ::testing::InitGoogleTest(&argc, argv);
+  return RUN_ALL_TESTS();
+}
diff --git a/test/core/gprpp/orphanable_test.cc b/test/core/gprpp/orphanable_test.cc
new file mode 100644
index 0000000000..ff2f6d8bc2
--- /dev/null
+++ b/test/core/gprpp/orphanable_test.cc
@@ -0,0 +1,114 @@
+/*
+ *
+ * Copyright 2017 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 "src/core/lib/gprpp/orphanable.h"
+
+#include <gtest/gtest.h>
+
+#include "src/core/lib/gprpp/memory.h"
+#include "test/core/util/test_config.h"
+
+namespace grpc_core {
+namespace testing {
+namespace {
+
+class Foo : public Orphanable {
+ public:
+  Foo() : Foo(0) {}
+  explicit Foo(int value) : value_(value) {}
+  void Orphan() override { Delete(this); }
+  int value() const { return value_; }
+
+ private:
+  int value_;
+};
+
+TEST(Orphanable, Basic) {
+  Foo* foo = New<Foo>();
+  foo->Orphan();
+}
+
+TEST(OrphanablePtr, Basic) {
+  OrphanablePtr<Foo> foo(New<Foo>());
+  EXPECT_EQ(0, foo->value());
+}
+
+TEST(MakeOrphanable, DefaultConstructor) {
+  auto foo = MakeOrphanable<Foo>();
+  EXPECT_EQ(0, foo->value());
+}
+
+TEST(MakeOrphanable, WithParameters) {
+  auto foo = MakeOrphanable<Foo>(5);
+  EXPECT_EQ(5, foo->value());
+}
+
+class Bar : public InternallyRefCounted {
+ public:
+  Bar() : Bar(0) {}
+  explicit Bar(int value) : value_(value) {}
+  void Orphan() override { Unref(); }
+  int value() const { return value_; }
+
+  void StartWork() { Ref(); }
+  void FinishWork() { Unref(); }
+
+ private:
+  int value_;
+};
+
+TEST(OrphanablePtr, InternallyRefCounted) {
+  auto bar = MakeOrphanable<Bar>();
+  bar->StartWork();
+  bar->FinishWork();
+}
+
+// Note: We use DebugOnlyTraceFlag instead of TraceFlag to ensure that
+// things build properly in both debug and non-debug cases.
+DebugOnlyTraceFlag baz_tracer(true, "baz");
+
+class Baz : public InternallyRefCountedWithTracing {
+ public:
+  Baz() : Baz(0) {}
+  explicit Baz(int value)
+      : InternallyRefCountedWithTracing(&baz_tracer), value_(value) {}
+  void Orphan() override { Unref(); }
+  int value() const { return value_; }
+
+  void StartWork() { Ref(DEBUG_LOCATION, "work"); }
+  void FinishWork() { Unref(DEBUG_LOCATION, "work"); }
+
+ private:
+  int value_;
+};
+
+TEST(OrphanablePtr, InternallyRefCountedWithTracing) {
+  auto baz = MakeOrphanable<Baz>();
+  baz->StartWork();
+  baz->FinishWork();
+}
+
+}  // namespace
+}  // namespace testing
+}  // namespace grpc_core
+
+int main(int argc, char** argv) {
+  grpc_test_init(argc, argv);
+  ::testing::InitGoogleTest(&argc, argv);
+  return RUN_ALL_TESTS();
+}
diff --git a/test/core/gprpp/ref_counted_ptr_test.cc b/test/core/gprpp/ref_counted_ptr_test.cc
new file mode 100644
index 0000000000..f1f13f3183
--- /dev/null
+++ b/test/core/gprpp/ref_counted_ptr_test.cc
@@ -0,0 +1,185 @@
+/*
+ *
+ * Copyright 2017 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 "src/core/lib/gprpp/ref_counted_ptr.h"
+
+#include <gtest/gtest.h>
+
+#include <grpc/support/log.h>
+
+#include "src/core/lib/gprpp/memory.h"
+#include "src/core/lib/gprpp/ref_counted.h"
+#include "test/core/util/test_config.h"
+
+namespace grpc_core {
+namespace testing {
+namespace {
+
+class Foo : public RefCounted {
+ public:
+  Foo() : value_(0) {}
+
+  explicit Foo(int value) : value_(value) {}
+
+  int value() const { return value_; }
+
+ private:
+  int value_;
+};
+
+TEST(RefCountedPtr, DefaultConstructor) { RefCountedPtr<Foo> foo; }
+
+TEST(RefCountedPtr, ExplicitConstructorEmpty) {
+  RefCountedPtr<Foo> foo(nullptr);
+}
+
+TEST(RefCountedPtr, ExplicitConstructor) { RefCountedPtr<Foo> foo(New<Foo>()); }
+
+TEST(RefCountedPtr, MoveConstructor) {
+  RefCountedPtr<Foo> foo(New<Foo>());
+  RefCountedPtr<Foo> foo2(std::move(foo));
+  EXPECT_EQ(nullptr, foo.get());
+  EXPECT_NE(nullptr, foo2.get());
+}
+
+TEST(RefCountedPtr, MoveAssignment) {
+  RefCountedPtr<Foo> foo(New<Foo>());
+  RefCountedPtr<Foo> foo2 = std::move(foo);
+  EXPECT_EQ(nullptr, foo.get());
+  EXPECT_NE(nullptr, foo2.get());
+}
+
+TEST(RefCountedPtr, CopyConstructor) {
+  RefCountedPtr<Foo> foo(New<Foo>());
+  RefCountedPtr<Foo> foo2(foo);
+  EXPECT_NE(nullptr, foo.get());
+  EXPECT_EQ(foo.get(), foo2.get());
+}
+
+TEST(RefCountedPtr, CopyAssignment) {
+  RefCountedPtr<Foo> foo(New<Foo>());
+  RefCountedPtr<Foo> foo2 = foo;
+  EXPECT_NE(nullptr, foo.get());
+  EXPECT_EQ(foo.get(), foo2.get());
+}
+
+TEST(RefCountedPtr, CopyAssignmentWhenEmpty) {
+  RefCountedPtr<Foo> foo;
+  RefCountedPtr<Foo> foo2;
+  foo2 = foo;
+  EXPECT_EQ(nullptr, foo.get());
+  EXPECT_EQ(nullptr, foo2.get());
+}
+
+TEST(RefCountedPtr, CopyAssignmentToSelf) {
+  RefCountedPtr<Foo> foo(New<Foo>());
+  foo = foo;
+}
+
+TEST(RefCountedPtr, EnclosedScope) {
+  RefCountedPtr<Foo> foo(New<Foo>());
+  {
+    RefCountedPtr<Foo> foo2(std::move(foo));
+    EXPECT_EQ(nullptr, foo.get());
+    EXPECT_NE(nullptr, foo2.get());
+  }
+  EXPECT_EQ(nullptr, foo.get());
+}
+
+TEST(RefCountedPtr, ResetFromNullToNonNull) {
+  RefCountedPtr<Foo> foo;
+  EXPECT_EQ(nullptr, foo.get());
+  foo.reset(New<Foo>());
+  EXPECT_NE(nullptr, foo.get());
+}
+
+TEST(RefCountedPtr, ResetFromNonNullToNonNull) {
+  RefCountedPtr<Foo> foo(New<Foo>());
+  EXPECT_NE(nullptr, foo.get());
+  Foo* original = foo.get();
+  foo.reset(New<Foo>());
+  EXPECT_NE(nullptr, foo.get());
+  EXPECT_NE(original, foo.get());
+}
+
+TEST(RefCountedPtr, ResetFromNonNullToNull) {
+  RefCountedPtr<Foo> foo(New<Foo>());
+  EXPECT_NE(nullptr, foo.get());
+  foo.reset();
+  EXPECT_EQ(nullptr, foo.get());
+}
+
+TEST(RefCountedPtr, ResetFromNullToNull) {
+  RefCountedPtr<Foo> foo;
+  EXPECT_EQ(nullptr, foo.get());
+  foo.reset(nullptr);
+  EXPECT_EQ(nullptr, foo.get());
+}
+
+TEST(RefCountedPtr, DerefernceOperators) {
+  RefCountedPtr<Foo> foo(New<Foo>());
+  foo->value();
+  Foo& foo_ref = *foo;
+  foo_ref.value();
+}
+
+TEST(RefCountedPtr, EqualityOperators) {
+  RefCountedPtr<Foo> foo(New<Foo>());
+  RefCountedPtr<Foo> bar = foo;
+  RefCountedPtr<Foo> empty;
+  // Test equality between RefCountedPtrs.
+  EXPECT_EQ(foo, bar);
+  EXPECT_NE(foo, empty);
+  // Test equality with bare pointers.
+  EXPECT_EQ(foo, foo.get());
+  EXPECT_EQ(empty, nullptr);
+  EXPECT_NE(foo, nullptr);
+}
+
+TEST(MakeRefCounted, NoArgs) {
+  RefCountedPtr<Foo> foo = MakeRefCounted<Foo>();
+  EXPECT_EQ(0, foo->value());
+}
+
+TEST(MakeRefCounted, Args) {
+  RefCountedPtr<Foo> foo = MakeRefCounted<Foo>(3);
+  EXPECT_EQ(3, foo->value());
+}
+
+TraceFlag foo_tracer(true, "foo");
+
+class FooWithTracing : public RefCountedWithTracing {
+ public:
+  FooWithTracing() : RefCountedWithTracing(&foo_tracer) {}
+};
+
+TEST(RefCountedPtr, RefCountedWithTracing) {
+  RefCountedPtr<FooWithTracing> foo(New<FooWithTracing>());
+  foo->Ref(DEBUG_LOCATION, "foo");
+  foo->Unref(DEBUG_LOCATION, "foo");
+}
+
+}  // namespace
+}  // namespace testing
+}  // namespace grpc_core
+
+int main(int argc, char** argv) {
+  grpc_test_init(argc, argv);
+  ::testing::InitGoogleTest(&argc, argv);
+  return RUN_ALL_TESTS();
+}
diff --git a/test/core/gprpp/ref_counted_test.cc b/test/core/gprpp/ref_counted_test.cc
new file mode 100644
index 0000000000..b1b0fee5c0
--- /dev/null
+++ b/test/core/gprpp/ref_counted_test.cc
@@ -0,0 +1,74 @@
+/*
+ *
+ * Copyright 2017 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 "src/core/lib/gprpp/ref_counted.h"
+
+#include <gtest/gtest.h>
+
+#include "src/core/lib/gprpp/memory.h"
+#include "test/core/util/test_config.h"
+
+namespace grpc_core {
+namespace testing {
+namespace {
+
+class Foo : public RefCounted {
+ public:
+  Foo() {}
+};
+
+TEST(RefCounted, Basic) {
+  Foo* foo = New<Foo>();
+  foo->Unref();
+}
+
+TEST(RefCounted, ExtraRef) {
+  Foo* foo = New<Foo>();
+  foo->Ref();
+  foo->Unref();
+  foo->Unref();
+}
+
+// Note: We use DebugOnlyTraceFlag instead of TraceFlag to ensure that
+// things build properly in both debug and non-debug cases.
+DebugOnlyTraceFlag foo_tracer(true, "foo");
+
+class FooWithTracing : public RefCountedWithTracing {
+ public:
+  FooWithTracing() : RefCountedWithTracing(&foo_tracer) {}
+};
+
+TEST(RefCountedWithTracing, Basic) {
+  FooWithTracing* foo = New<FooWithTracing>();
+  foo->Ref(DEBUG_LOCATION, "extra_ref");
+  foo->Unref(DEBUG_LOCATION, "extra_ref");
+  // Can use the no-argument methods, too.
+  foo->Ref();
+  foo->Unref();
+  foo->Unref(DEBUG_LOCATION, "original_ref");
+}
+
+}  // namespace
+}  // namespace testing
+}  // namespace grpc_core
+
+int main(int argc, char** argv) {
+  grpc_test_init(argc, argv);
+  ::testing::InitGoogleTest(&argc, argv);
+  return RUN_ALL_TESTS();
+}