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Unified Diff: base/lazy_instance_unittest.cc

Issue 1647803004: Move base to DEPS (Closed) Base URL: git@github.com:domokit/mojo.git@master
Patch Set: Created 4 years, 11 months ago
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Index: base/lazy_instance_unittest.cc
diff --git a/base/lazy_instance_unittest.cc b/base/lazy_instance_unittest.cc
deleted file mode 100644
index ec9ef2673207e8734bb900008c1e1cc368d416a5..0000000000000000000000000000000000000000
--- a/base/lazy_instance_unittest.cc
+++ /dev/null
@@ -1,172 +0,0 @@
-// Copyright (c) 2012 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.
-
-#include "base/at_exit.h"
-#include "base/atomic_sequence_num.h"
-#include "base/lazy_instance.h"
-#include "base/memory/aligned_memory.h"
-#include "base/threading/simple_thread.h"
-#include "testing/gtest/include/gtest/gtest.h"
-
-namespace {
-
-base::StaticAtomicSequenceNumber constructed_seq_;
-base::StaticAtomicSequenceNumber destructed_seq_;
-
-class ConstructAndDestructLogger {
- public:
- ConstructAndDestructLogger() {
- constructed_seq_.GetNext();
- }
- ~ConstructAndDestructLogger() {
- destructed_seq_.GetNext();
- }
-};
-
-class SlowConstructor {
- public:
- SlowConstructor() : some_int_(0) {
- // Sleep for 1 second to try to cause a race.
- base::PlatformThread::Sleep(base::TimeDelta::FromSeconds(1));
- ++constructed;
- some_int_ = 12;
- }
- int some_int() const { return some_int_; }
-
- static int constructed;
- private:
- int some_int_;
-};
-
-int SlowConstructor::constructed = 0;
-
-class SlowDelegate : public base::DelegateSimpleThread::Delegate {
- public:
- explicit SlowDelegate(base::LazyInstance<SlowConstructor>* lazy)
- : lazy_(lazy) {}
-
- void Run() override {
- EXPECT_EQ(12, lazy_->Get().some_int());
- EXPECT_EQ(12, lazy_->Pointer()->some_int());
- }
-
- private:
- base::LazyInstance<SlowConstructor>* lazy_;
-};
-
-} // namespace
-
-static base::LazyInstance<ConstructAndDestructLogger> lazy_logger =
- LAZY_INSTANCE_INITIALIZER;
-
-TEST(LazyInstanceTest, Basic) {
- {
- base::ShadowingAtExitManager shadow;
-
- EXPECT_EQ(0, constructed_seq_.GetNext());
- EXPECT_EQ(0, destructed_seq_.GetNext());
-
- lazy_logger.Get();
- EXPECT_EQ(2, constructed_seq_.GetNext());
- EXPECT_EQ(1, destructed_seq_.GetNext());
-
- lazy_logger.Pointer();
- EXPECT_EQ(3, constructed_seq_.GetNext());
- EXPECT_EQ(2, destructed_seq_.GetNext());
- }
- EXPECT_EQ(4, constructed_seq_.GetNext());
- EXPECT_EQ(4, destructed_seq_.GetNext());
-}
-
-static base::LazyInstance<SlowConstructor> lazy_slow =
- LAZY_INSTANCE_INITIALIZER;
-
-TEST(LazyInstanceTest, ConstructorThreadSafety) {
- {
- base::ShadowingAtExitManager shadow;
-
- SlowDelegate delegate(&lazy_slow);
- EXPECT_EQ(0, SlowConstructor::constructed);
-
- base::DelegateSimpleThreadPool pool("lazy_instance_cons", 5);
- pool.AddWork(&delegate, 20);
- EXPECT_EQ(0, SlowConstructor::constructed);
-
- pool.Start();
- pool.JoinAll();
- EXPECT_EQ(1, SlowConstructor::constructed);
- }
-}
-
-namespace {
-
-// DeleteLogger is an object which sets a flag when it's destroyed.
-// It accepts a bool* and sets the bool to true when the dtor runs.
-class DeleteLogger {
- public:
- DeleteLogger() : deleted_(NULL) {}
- ~DeleteLogger() { *deleted_ = true; }
-
- void SetDeletedPtr(bool* deleted) {
- deleted_ = deleted;
- }
-
- private:
- bool* deleted_;
-};
-
-} // anonymous namespace
-
-TEST(LazyInstanceTest, LeakyLazyInstance) {
- // Check that using a plain LazyInstance causes the dtor to run
- // when the AtExitManager finishes.
- bool deleted1 = false;
- {
- base::ShadowingAtExitManager shadow;
- static base::LazyInstance<DeleteLogger> test = LAZY_INSTANCE_INITIALIZER;
- test.Get().SetDeletedPtr(&deleted1);
- }
- EXPECT_TRUE(deleted1);
-
- // Check that using a *leaky* LazyInstance makes the dtor not run
- // when the AtExitManager finishes.
- bool deleted2 = false;
- {
- base::ShadowingAtExitManager shadow;
- static base::LazyInstance<DeleteLogger>::Leaky
- test = LAZY_INSTANCE_INITIALIZER;
- test.Get().SetDeletedPtr(&deleted2);
- }
- EXPECT_FALSE(deleted2);
-}
-
-namespace {
-
-template <size_t alignment>
-class AlignedData {
- public:
- AlignedData() {}
- ~AlignedData() {}
- base::AlignedMemory<alignment, alignment> data_;
-};
-
-} // anonymous namespace
-
-#define EXPECT_ALIGNED(ptr, align) \
- EXPECT_EQ(0u, reinterpret_cast<uintptr_t>(ptr) & (align - 1))
-
-TEST(LazyInstanceTest, Alignment) {
- using base::LazyInstance;
-
- // Create some static instances with increasing sizes and alignment
- // requirements. By ordering this way, the linker will need to do some work to
- // ensure proper alignment of the static data.
- static LazyInstance<AlignedData<4> > align4 = LAZY_INSTANCE_INITIALIZER;
- static LazyInstance<AlignedData<32> > align32 = LAZY_INSTANCE_INITIALIZER;
- static LazyInstance<AlignedData<4096> > align4096 = LAZY_INSTANCE_INITIALIZER;
-
- EXPECT_ALIGNED(align4.Pointer(), 4);
- EXPECT_ALIGNED(align32.Pointer(), 32);
- EXPECT_ALIGNED(align4096.Pointer(), 4096);
-}
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