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/firmware/tests/gtest-1.4.0/samples/sample10_unittest.cc

http://github.com/makerbot/G3Firmware
C++ | 145 lines | 62 code | 22 blank | 61 comment | 5 complexity | 0796d165d3142759a119d3ffd0a0f268 MD5 | raw file
  1// Copyright 2009 Google Inc. All Rights Reserved.
  2//
  3// Redistribution and use in source and binary forms, with or without
  4// modification, are permitted provided that the following conditions are
  5// met:
  6//
  7//     * Redistributions of source code must retain the above copyright
  8// notice, this list of conditions and the following disclaimer.
  9//     * Redistributions in binary form must reproduce the above
 10// copyright notice, this list of conditions and the following disclaimer
 11// in the documentation and/or other materials provided with the
 12// distribution.
 13//     * Neither the name of Google Inc. nor the names of its
 14// contributors may be used to endorse or promote products derived from
 15// this software without specific prior written permission.
 16//
 17// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
 18// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
 19// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
 20// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
 21// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
 22// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
 23// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
 24// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
 25// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 26// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
 27// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 28//
 29// Author: vladl@google.com (Vlad Losev)
 30
 31// This sample shows how to use Google Test listener API to implement
 32// a primitive leak checker.
 33
 34#include <stdio.h>
 35#include <stdlib.h>
 36
 37#include <gtest/gtest.h>
 38
 39using ::testing::EmptyTestEventListener;
 40using ::testing::InitGoogleTest;
 41using ::testing::Test;
 42using ::testing::TestCase;
 43using ::testing::TestEventListeners;
 44using ::testing::TestInfo;
 45using ::testing::TestPartResult;
 46using ::testing::UnitTest;
 47
 48namespace {
 49
 50// We will track memory used by this class.
 51class Water {
 52 public:
 53  // Normal Water declarations go here.
 54
 55  // operator new and operator delete help us control water allocation.
 56  void* operator new(size_t allocation_size) {
 57    allocated_++;
 58    return malloc(allocation_size);
 59  }
 60
 61  void operator delete(void* block, size_t allocation_size) {
 62    allocated_--;
 63    free(block);
 64  }
 65
 66  static int allocated() { return allocated_; }
 67
 68 private:
 69  static int allocated_;
 70};
 71
 72int Water::allocated_ = 0;
 73
 74// This event listener monitors how many Water objects are created and
 75// destroyed by each test, and reports a failure if a test leaks some Water
 76// objects. It does this by comparing the number of live Water objects at
 77// the beginning of a test and at the end of a test.
 78class LeakChecker : public EmptyTestEventListener {
 79 private:
 80  // Called before a test starts.
 81  virtual void OnTestStart(const TestInfo& test_info) {
 82    initially_allocated_ = Water::allocated();
 83  }
 84
 85  // Called after a test ends.
 86  virtual void OnTestEnd(const TestInfo& test_info) {
 87    int difference = Water::allocated() - initially_allocated_;
 88
 89    // You can generate a failure in any event handler except
 90    // OnTestPartResult. Just use an appropriate Google Test assertion to do
 91    // it.
 92    EXPECT_TRUE(difference <= 0)
 93        << "Leaked " << difference << " unit(s) of Water!";
 94  }
 95
 96  int initially_allocated_;
 97};
 98
 99TEST(ListenersTest, DoesNotLeak) {
100  Water* water = new Water;
101  delete water;
102}
103
104// This should fail when the --check_for_leaks command line flag is
105// specified.
106TEST(ListenersTest, LeaksWater) {
107  Water* water = new Water;
108  EXPECT_TRUE(water != NULL);
109}
110
111}  // namespace
112
113int main(int argc, char **argv) {
114  InitGoogleTest(&argc, argv);
115
116  bool check_for_leaks = false;
117  if (argc > 1 && strcmp(argv[1], "--check_for_leaks") == 0 )
118    check_for_leaks = true;
119  else
120    printf("%s\n", "Run this program with --check_for_leaks to enable "
121           "custom leak checking in the tests.");
122
123  // If we are given the --check_for_leaks command line flag, installs the
124  // leak checker.
125  if (check_for_leaks) {
126    TestEventListeners& listeners = UnitTest::GetInstance()->listeners();
127
128    // Adds the leak checker to the end of the test event listener list,
129    // after the default text output printer and the default XML report
130    // generator.
131    //
132    // The order is important - it ensures that failures generated in the
133    // leak checker's OnTestEnd() method are processed by the text and XML
134    // printers *before* their OnTestEnd() methods are called, such that
135    // they are attributed to the right test. Remember that a listener
136    // receives an OnXyzStart event *after* listeners preceding it in the
137    // list received that event, and receives an OnXyzEnd event *before*
138    // listeners preceding it.
139    //
140    // We don't need to worry about deleting the new listener later, as
141    // Google Test will do it.
142    listeners.Append(new LeakChecker);
143  }
144  return RUN_ALL_TESTS();
145}