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Improves EXPECT_DEATH_IF_SUPPORTED to allow streaming of messages and enforcing the validity of arguments (by Vlad Losev); adds samples for the event listener API (by Vlad Losev); simplifies the tests using EXPECT_DEATH_IF_SUPPORTED (by Zhanyong Wan).

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zhanyong.wan
2009-09-11 06:59:42 +00:00
parent f6dd67a155
commit b2ee82ebf9
12 changed files with 497 additions and 41 deletions
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samples/sample10_unittest.cc Normal file
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// 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.
//
// Author: vladl@google.com (Vlad Losev)
// 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::InitGoogleTest;
using ::testing::Test;
using ::testing::TestInfo;
using ::testing::TestPartResult;
using ::testing::UnitTest;
using ::testing::internal::EmptyTestEventListener;
using ::testing::internal::EventListeners;
using ::testing::internal::TestCase;
namespace testing {
namespace internal {
// TODO(vladl@google.com): Get rid of the accessor class once the API is
// published.
class UnitTestAccessor {
public:
static bool Passed(const UnitTest& unit_test) { return unit_test.Passed(); }
static EventListeners& listeners(UnitTest* unit_test) {
return unit_test->listeners();
}
};
} // namespace internal
} // namespace testing
using ::testing::internal::UnitTestAccessor;
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.
virtual void OnTestStart(const TestInfo& test_info) {
initially_allocated_ = Water::allocated();
}
// Called after a test ends.
virtual void OnTestEnd(const TestInfo& test_info) {
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_TRUE(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 != NULL);
}
} // namespace
int 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;
else
printf("%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) {
EventListeners& listeners = UnitTestAccessor::listeners(
UnitTest::GetInstance());
// 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 checker's 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 don't need to worry about deleting the new listener later, as
// Google Test will do it.
listeners.Append(new LeakChecker);
}
return RUN_ALL_TESTS();
}

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// 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.
//
// Author: vladl@google.com (Vlad Losev)
// This sample shows how to use Google Test listener API to implement
// an alternative console output and how to use the UnitTest reflection API
// to enumerate test cases and tests and to inspect their results.
#include <stdio.h>
#include <gtest/gtest.h>
using ::testing::InitGoogleTest;
using ::testing::Test;
using ::testing::TestInfo;
using ::testing::TestPartResult;
using ::testing::UnitTest;
using ::testing::internal::EmptyTestEventListener;
using ::testing::internal::EventListeners;
using ::testing::internal::TestCase;
namespace testing {
namespace internal {
// TODO(vladl@google.com): Get rid of the accessor class once the API is
// published.
class UnitTestAccessor {
public:
static bool Passed(const UnitTest& unit_test) { return unit_test.Passed(); }
static EventListeners& listeners(UnitTest* unit_test) {
return unit_test->listeners();
}
static int GetTotalTestCaseCount(const UnitTest& unit_test) {
return unit_test.total_test_case_count();
}
static const TestCase* GetTestCase(const UnitTest& unit_test, int index) {
return unit_test.GetTestCase(index);
}
};
} // namespace internal
} // namespace testing
using ::testing::internal::UnitTestAccessor;
namespace {
// Provides alternative output mode which produces minimal amount of
// information about tests.
class TersePrinter : public EmptyTestEventListener {
private:
// Called before any test activity starts.
virtual void OnTestProgramStart(const UnitTest& unit_test) {}
// Called after all test activities have ended.
virtual void OnTestProgramEnd(const UnitTest& unit_test) {
fprintf(stdout,
"TEST %s\n",
UnitTestAccessor::Passed(unit_test) ? "PASSED" : "FAILED");
fflush(stdout);
}
// Called before a test starts.
virtual void OnTestStart(const TestInfo& test_info) {
fprintf(stdout,
"*** Test %s.%s starting.\n",
test_info.test_case_name(),
test_info.name());
fflush(stdout);
}
// Called after a test ends.
virtual void OnTestEnd(const TestInfo& test_info) {
fprintf(stdout,
"*** Test %s.%s ending.\n",
test_info.test_case_name(),
test_info.name());
fflush(stdout);
}
// Called after a failed assertion or a SUCCESS().
virtual void OnNewTestPartResult(const TestPartResult& test_part_result) {
fprintf(stdout,
"%s in %s:%d\n%s\n",
test_part_result.failed() ? "*** Failure" : "Success",
test_part_result.file_name(),
test_part_result.line_number(),
test_part_result.summary());
fflush(stdout);
}
}; // class TersePrinter
TEST(CustomOutputTest, PrintsMessage) {
printf("Printing something from the test body...\n");
}
TEST(CustomOutputTest, Succeeds) {
SUCCEED() << "SUCCEED() has been invoked from here";
}
TEST(CustomOutputTest, Fails) {
EXPECT_EQ(1, 2)
<< "This test fails in order to demonstrate alternative failure messages";
}
} // namespace
int main(int argc, char **argv) {
InitGoogleTest(&argc, argv);
bool terse_output = false;
if (argc > 1 && strcmp(argv[1], "--terse_output") == 0 )
terse_output = true;
else
printf("%s\n", "Run this program with --terse_output to change the way "
"it prints its output.");
// If we are given the --terse_output command line flag, suppresses the
// standard output and attaches own result printer.
if (terse_output) {
EventListeners& listeners = UnitTestAccessor::listeners(
UnitTest::GetInstance());
// Removes the default console output listener from the list so it will
// not receive events from Google Test and won't print any output. Since
// this operation transfers ownership of the listener to the caller we
// have to delete it as well.
delete listeners.Release(listeners.default_result_printer());
// Adds the custom output listener to the list. It will now receive
// events from Google Test and print the alternative output. We don't
// have to worry about deleting it since Google Test assumes ownership
// over it after adding it to the list.
listeners.Append(new TersePrinter);
}
int ret_val = RUN_ALL_TESTS();
// This is an example of using the UnitTest reflection API to inspect test
// results. Here we discount failures from the tests we expected to fail.
int unexpectedly_failed_tests = 0;
for (int i = 0;
i < UnitTestAccessor::GetTotalTestCaseCount(*UnitTest::GetInstance());
++i) {
const TestCase* test_case = UnitTestAccessor::GetTestCase(
*UnitTest::GetInstance(), i);
for (int j = 0; j < test_case->total_test_count(); ++j) {
const TestInfo* test_info = test_case->GetTestInfo(j);
// Counts failed tests that were not meant to fail (those without
// 'Fails' in the name).
if (test_info->result()->Failed() &&
strcmp(test_info->name(), "Fails") != 0) {
unexpectedly_failed_tests++;
}
}
}
// Test that were meant to fail should not affect the test program outcome.
if (unexpectedly_failed_tests == 0)
ret_val = 0;
return ret_val;
}