Mojo: Move mojo/public/{c,cpp}/tests/FOO to mojo/public/{c,cpp}/FOO/tests.

mojo/public/c/tests/system/macros_unittest.cc

-// Copyright 2014 The Chromium Authors. All rights reserved.
-// Use of this source code is governed by a BSD-style license that can be
-// found in the LICENSE file.
-
-// This file tests the C Mojo system macros and consists of "positive" tests,
-// i.e., those verifying that things work (without compile errors, or even
-// warnings if warnings are treated as errors).
-// TODO(vtl): Fix no-compile tests (which are all disabled; crbug.com/105388)
-// and write some "negative" tests.
-
-#include "mojo/public/c/system/macros.h"
-
-#include <assert.h>
-#include <stdint.h>
-#include <stdlib.h>
-
-#include "testing/gtest/include/gtest/gtest.h"
-
-namespace mojo {
-namespace {
-
-TEST(MacrosTest, AllowUnused) {
-  // Test that no warning/error is issued even though |x| is unused.
-  int x MOJO_ALLOW_UNUSED = 123;
-}
-
-int MustUseReturnedResult() MOJO_WARN_UNUSED_RESULT;
-int MustUseReturnedResult() {
-  return 456;
-}
-
-TEST(MacrosTest, WarnUnusedResult) {
-  if (!MustUseReturnedResult())
-    abort();
-}
-
-// First test |MOJO_COMPILE_ASSERT()| in a global scope.
-MOJO_COMPILE_ASSERT(sizeof(int64_t) == 2 * sizeof(int32_t),
-                    bad_compile_assert_failure_in_global_scope);
-
-TEST(MacrosTest, CompileAssert) {
-  // Then in a local scope.
-  MOJO_COMPILE_ASSERT(sizeof(int32_t) == 2 * sizeof(int16_t),
-                      bad_compile_assert_failure);
-}
-
-}  // namespace
-}  // namespace mojo