湛江专业建站免费咨询,网页编辑岗位职责和任职要求,别墅装修装饰,个人网站建什么类型的GoogleTest单元测试可用实现在每个测试用例结束后监控其内存使用情况#xff0c;
可以通过GoogleTest提供的事件侦听器EmptyTestEventListener 来实现#xff0c;下面通过官方提供的sample例子#xff0c;路径在samples文件夹下的sample10_unittest.cpp
// Copyright 2009…GoogleTest单元测试可用实现在每个测试用例结束后监控其内存使用情况
可以通过GoogleTest提供的事件侦听器EmptyTestEventListener 来实现下面通过官方提供的sample例子路径在samples文件夹下的sample10_unittest.cpp
// Copyright 2009 Google Inc. All Rights Reserved.
//
// Redistribution and use in source and binary forms, with or without
// modification, are permitted provided that the following conditions are
// met:
//
// * Redistributions of source code must retain the above copyright
// notice, this list of conditions and the following disclaimer.
// * Redistributions in binary form must reproduce the above
// copyright notice, this list of conditions and the following disclaimer
// in the documentation and/or other materials provided with the
// distribution.
// * Neither the name of Google Inc. nor the names of its
// contributors may be used to endorse or promote products derived from
// this software without specific prior written permission.
//
// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
// AS IS AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.// This sample shows how to use Google Test listener API to implement
// a primitive leak checker.#include stdio.h
#include stdlib.h#include gtest/gtest.h
using ::testing::EmptyTestEventListener;
using ::testing::InitGoogleTest;
using ::testing::Test;
using ::testing::TestEventListeners;
using ::testing::TestInfo;
using ::testing::TestPartResult;
using ::testing::UnitTest;namespace {
// We will track memory used by this class.
class Water {public:// Normal Water declarations go here.// operator new and operator delete help us control water allocation.void* operator new(size_t allocation_size) {allocated_;return malloc(allocation_size);}void operator delete(void* block, size_t /* allocation_size */) {allocated_--;free(block);}static int allocated() { return allocated_; }private:static int allocated_;
};int Water::allocated_ 0;// This event listener monitors how many Water objects are created and
// destroyed by each test, and reports a failure if a test leaks some Water
// objects. It does this by comparing the number of live Water objects at
// the beginning of a test and at the end of a test.
class LeakChecker : public EmptyTestEventListener {private:// Called before a test starts.void OnTestStart(const TestInfo /* test_info */) override {initially_allocated_ Water::allocated();}// Called after a test ends.void OnTestEnd(const TestInfo /* test_info */) override {int difference Water::allocated() - initially_allocated_;// You can generate a failure in any event handler except// OnTestPartResult. Just use an appropriate Google Test assertion to do// it.EXPECT_LE(difference, 0) Leaked difference unit(s) of Water!;}int initially_allocated_;
};TEST(ListenersTest, DoesNotLeak) {Water* water new Water;delete water;
}// This should fail when the --check_for_leaks command line flag is
// specified.
TEST(ListenersTest, LeaksWater) {Water* water new Water;EXPECT_TRUE(water ! nullptr);
}
} // namespaceint main(int argc, char **argv) {InitGoogleTest(argc, argv);bool check_for_leaks false;if (argc 1 strcmp(argv[1], --check_for_leaks) 0 )check_for_leaks true;elseprintf(%s\n, Run this program with --check_for_leaks to enable custom leak checking in the tests.);// If we are given the --check_for_leaks command line flag, installs the// leak checker.if (check_for_leaks) {TestEventListeners listeners UnitTest::GetInstance()-listeners();// Adds the leak checker to the end of the test event listener list,// after the default text output printer and the default XML report// generator.//// The order is important - it ensures that failures generated in the// leak checkers OnTestEnd() method are processed by the text and XML// printers *before* their OnTestEnd() methods are called, such that// they are attributed to the right test. Remember that a listener// receives an OnXyzStart event *after* listeners preceding it in the// list received that event, and receives an OnXyzEnd event *before*// listeners preceding it.//// We dont need to worry about deleting the new listener later, as// Google Test will do it.listeners.Append(new LeakChecker);}return RUN_ALL_TESTS();
}
通过Water类来重写new和delete方法来实现记录内存分配/释放的情况另外通过LeakChecker 继承自EmptyTestEventListener 并实现OnTestStart测试用例开始前运行和OnTestEnd方法测试用例结束后运行
关于LeakChecker的使用是先获取系统提供的listeners 然后把自定义事件加入到系统中去即可。 TestEventListeners listeners UnitTest::GetInstance()-listeners(); listeners.Append(new LeakChecker);
