blob: 6619e4d984d8b7fbac5ef9d4153eda5a99bfe80d [file] [log] [blame]
// 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;
// and write some "negative" tests.
#include <mojo/macros.h>
#include <assert.h>
#include <stdint.h>
#include <stdlib.h>
#include "gtest/gtest.h"
namespace mojo {
namespace {
TEST(MacrosTest, AllowUnused) {
// Test that no warning/error is issued even though |x| is unused.
int x = 123;
int MustUseReturnedResult() MOJO_WARN_UNUSED_RESULT;
int MustUseReturnedResult() {
return 456;
TEST(MacrosTest, WarnUnusedResult) {
if (!MustUseReturnedResult())
// First test |MOJO_STATIC_ASSERT()| in a global scope.
MOJO_STATIC_ASSERT(sizeof(int64_t) == 2 * sizeof(int32_t),
"Bad static_assert() failure in global scope");
TEST(MacrosTest, CompileAssert) {
// Then in a local scope.
MOJO_STATIC_ASSERT(sizeof(int32_t) == 2 * sizeof(int16_t),
"Bad static_assert() failure");
TEST(MacrosTest, Alignof) {
// Strictly speaking, this isn't a portable test, but I think it'll pass on
// all the platforms we currently support.
// These structs are used in the Alignas test. Define them globally to avoid
// MSVS warnings/errors.
#if defined(_MSC_VER)
#pragma warning(push)
// Disable the warning "structure was padded due to __declspec(align())".
#pragma warning(disable : 4324)
struct MOJO_ALIGNAS(1) StructAlignas1 {
char x;
struct MOJO_ALIGNAS(4) StructAlignas4 {
char x;
struct MOJO_ALIGNAS(8) StructAlignas8 {
char x;
#if defined(_MSC_VER)
#pragma warning(pop)
TEST(MacrosTest, Alignas) {
EXPECT_EQ(1u, MOJO_ALIGNOF(StructAlignas1));
EXPECT_EQ(4u, MOJO_ALIGNOF(StructAlignas4));
EXPECT_EQ(8u, MOJO_ALIGNOF(StructAlignas8));
} // namespace
} // namespace mojo