114 lines
2.9 KiB
C++
114 lines
2.9 KiB
C++
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// Copyright (c) 2011 The Chromium Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style license that can be
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// found in the LICENSE file.
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#include "base/debug/leak_tracker.h"
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#include "base/memory/scoped_ptr.h"
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#include "testing/gtest/include/gtest/gtest.h"
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namespace base {
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namespace debug {
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namespace {
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class ClassA {
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private:
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LeakTracker<ClassA> leak_tracker_;
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};
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class ClassB {
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private:
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LeakTracker<ClassB> leak_tracker_;
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};
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#ifndef ENABLE_LEAK_TRACKER
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// If leak tracking is disabled, we should do nothing.
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TEST(LeakTrackerTest, NotEnabled) {
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EXPECT_EQ(-1, LeakTracker<ClassA>::NumLiveInstances());
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EXPECT_EQ(-1, LeakTracker<ClassB>::NumLiveInstances());
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// Use scoped_ptr so compiler doesn't complain about unused variables.
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scoped_ptr<ClassA> a1(new ClassA);
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scoped_ptr<ClassB> b1(new ClassB);
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scoped_ptr<ClassB> b2(new ClassB);
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EXPECT_EQ(-1, LeakTracker<ClassA>::NumLiveInstances());
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EXPECT_EQ(-1, LeakTracker<ClassB>::NumLiveInstances());
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}
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#else
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TEST(LeakTrackerTest, Basic) {
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{
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ClassA a1;
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EXPECT_EQ(1, LeakTracker<ClassA>::NumLiveInstances());
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EXPECT_EQ(0, LeakTracker<ClassB>::NumLiveInstances());
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ClassB b1;
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ClassB b2;
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EXPECT_EQ(1, LeakTracker<ClassA>::NumLiveInstances());
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EXPECT_EQ(2, LeakTracker<ClassB>::NumLiveInstances());
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scoped_ptr<ClassA> a2(new ClassA);
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EXPECT_EQ(2, LeakTracker<ClassA>::NumLiveInstances());
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EXPECT_EQ(2, LeakTracker<ClassB>::NumLiveInstances());
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a2.reset();
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EXPECT_EQ(1, LeakTracker<ClassA>::NumLiveInstances());
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EXPECT_EQ(2, LeakTracker<ClassB>::NumLiveInstances());
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}
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EXPECT_EQ(0, LeakTracker<ClassA>::NumLiveInstances());
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EXPECT_EQ(0, LeakTracker<ClassB>::NumLiveInstances());
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}
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// Try some orderings of create/remove to hit different cases in the linked-list
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// assembly.
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TEST(LeakTrackerTest, LinkedList) {
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EXPECT_EQ(0, LeakTracker<ClassB>::NumLiveInstances());
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scoped_ptr<ClassA> a1(new ClassA);
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scoped_ptr<ClassA> a2(new ClassA);
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scoped_ptr<ClassA> a3(new ClassA);
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scoped_ptr<ClassA> a4(new ClassA);
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EXPECT_EQ(4, LeakTracker<ClassA>::NumLiveInstances());
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// Remove the head of the list (a1).
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a1.reset();
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EXPECT_EQ(3, LeakTracker<ClassA>::NumLiveInstances());
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// Remove the tail of the list (a4).
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a4.reset();
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EXPECT_EQ(2, LeakTracker<ClassA>::NumLiveInstances());
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// Append to the new tail of the list (a3).
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scoped_ptr<ClassA> a5(new ClassA);
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EXPECT_EQ(3, LeakTracker<ClassA>::NumLiveInstances());
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a2.reset();
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a3.reset();
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EXPECT_EQ(1, LeakTracker<ClassA>::NumLiveInstances());
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a5.reset();
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EXPECT_EQ(0, LeakTracker<ClassA>::NumLiveInstances());
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}
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TEST(LeakTrackerTest, NoOpCheckForLeaks) {
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// There are no live instances of ClassA, so this should do nothing.
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LeakTracker<ClassA>::CheckForLeaks();
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}
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#endif // ENABLE_LEAK_TRACKER
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} // namespace
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} // namespace debug
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} // namespace base
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