aboutsummaryrefslogtreecommitdiffstats
path: root/googlemock/src/gmock.cc
blob: 32b2a7394fd08cb19c13d0017539bce308195db0 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
// Copyright 2008, 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.


#include "gmock/gmock.h"
#include "gmock/internal/gmock-port.h"

namespace testing {

GMOCK_DEFINE_bool_(catch_leaked_mocks, true,
                   "true if and only if Google Mock should report leaked "
                   "mock objects as failures.");

GMOCK_DEFINE_string_(verbose, internal::kWarningVerbosity,
                     "Controls how verbose Google Mock's output is."
                     "  Valid values:\n"
                     "  info    - prints all messages.\n"
                     "  warning - prints warnings and errors.\n"
                     "  error   - prints errors only.");

GMOCK_DEFINE_int32_(default_mock_behavior, 1,
                    "Controls the default behavior of mocks."
                    "  Valid values:\n"
                    "  0 - by default, mocks act as NiceMocks.\n"
                    "  1 - by default, mocks act as NaggyMocks.\n"
                    "  2 - by default, mocks act as StrictMocks.");

namespace internal {

// Parses a string as a command line flag.  The string should have the
// format "--gmock_flag=value".  When def_optional is true, the
// "=value" part can be omitted.
//
// Returns the value of the flag, or NULL if the parsing failed.
static const char* ParseGoogleMockFlagValue(const char* str,
                                            const char* flag,
                                            bool def_optional) {
  // str and flag must not be NULL.
  if (str == nullptr || flag == nullptr) return nullptr;

  // The flag must start with "--gmock_".
  const std::string flag_str = std::string("--gmock_") + flag;
  const size_t flag_len = flag_str.length();
  if (strncmp(str, flag_str.c_str(), flag_len) != 0) return nullptr;

  // Skips the flag name.
  const char* flag_end = str + flag_len;

  // When def_optional is true, it's OK to not have a "=value" part.
  if (def_optional && (flag_end[0] == '\0')) {
    return flag_end;
  }

  // If def_optional is true and there are more characters after the
  // flag name, or if def_optional is false, there must be a '=' after
  // the flag name.
  if (flag_end[0] != '=') return nullptr;

  // Returns the string after "=".
  return flag_end + 1;
}

// Parses a string for a Google Mock bool flag, in the form of
// "--gmock_flag=value".
//
// On success, stores the value of the flag in *value, and returns
// true.  On failure, returns false without changing *value.
static bool ParseGoogleMockBoolFlag(const char* str, const char* flag,
                                    bool* value) {
  // Gets the value of the flag as a string.
  const char* const value_str = ParseGoogleMockFlagValue(str, flag, true);

  // Aborts if the parsing failed.
  if (value_str == nullptr) return false;

  // Converts the string value to a bool.
  *value = !(*value_str == '0' || *value_str == 'f' || *value_str == 'F');
  return true;
}

// Parses a string for a Google Mock string flag, in the form of
// "--gmock_flag=value".
//
// On success, stores the value of the flag in *value, and returns
// true.  On failure, returns false without changing *value.
template <typename String>
static bool ParseGoogleMockStringFlag(const char* str, const char* flag,
                                      String* value) {
  // Gets the value of the flag as a string.
  const char* const value_str = ParseGoogleMockFlagValue(str, flag, false);

  // Aborts if the parsing failed.
  if (value_str == nullptr) return false;

  // Sets *value to the value of the flag.
  *value = value_str;
  return true;
}

static bool ParseGoogleMockIntFlag(const char* str, const char* flag,
                                   int* value) {
  // Gets the value of the flag as a string.
  const char* const value_str = ParseGoogleMockFlagValue(str, flag, true);

  // Aborts if the parsing failed.
  if (value_str == nullptr) return false;

  // Sets *value to the value of the flag.
  return ParseInt32(Message() << "The value of flag --" << flag,
                    value_str, value);
}

// The internal implementation of InitGoogleMock().
//
// The type parameter CharType can be instantiated to either char or
// wchar_t.
template <typename CharType>
void InitGoogleMockImpl(int* argc, CharType** argv) {
  // Makes sure Google Test is initialized.  InitGoogleTest() is
  // idempotent, so it's fine if the user has already called it.
  InitGoogleTest(argc, argv);
  if (*argc <= 0) return;

  for (int i = 1; i != *argc; i++) {
    const std::string arg_string = StreamableToString(argv[i]);
    const char* const arg = arg_string.c_str();

    // Do we see a Google Mock flag?
    if (ParseGoogleMockBoolFlag(arg, "catch_leaked_mocks",
                                &GMOCK_FLAG(catch_leaked_mocks)) ||
        ParseGoogleMockStringFlag(arg, "verbose", &GMOCK_FLAG(verbose)) ||
        ParseGoogleMockIntFlag(arg, "default_mock_behavior",
                               &GMOCK_FLAG(default_mock_behavior))) {
      // Yes.  Shift the remainder of the argv list left by one.  Note
      // that argv has (*argc + 1) elements, the last one always being
      // NULL.  The following loop moves the trailing NULL element as
      // well.
      for (int j = i; j != *argc; j++) {
        argv[j] = argv[j + 1];
      }

      // Decrements the argument count.
      (*argc)--;

      // We also need to decrement the iterator as we just removed
      // an element.
      i--;
    }
  }
}

}  // namespace internal

// Initializes Google Mock.  This must be called before running the
// tests.  In particular, it parses a command line for the flags that
// Google Mock recognizes.  Whenever a Google Mock flag is seen, it is
// removed from argv, and *argc is decremented.
//
// No value is returned.  Instead, the Google Mock flag variables are
// updated.
//
// Since Google Test is needed for Google Mock to work, this function
// also initializes Google Test and parses its flags, if that hasn't
// been done.
GTEST_API_ void InitGoogleMock(int* argc, char** argv) {
  internal::InitGoogleMockImpl(argc, argv);
}

// This overloaded version can be used in Windows programs compiled in
// UNICODE mode.
GTEST_API_ void InitGoogleMock(int* argc, wchar_t** argv) {
  internal::InitGoogleMockImpl(argc, argv);
}

// This overloaded version can be used on Arduino/embedded platforms where
// there is no argc/argv.
GTEST_API_ void InitGoogleMock() {
  // Since Arduino doesn't have a command line, fake out the argc/argv arguments
  int argc = 1;
  const auto arg0 = "dummy";
  char* argv0 = const_cast<char*>(arg0);
  char** argv = &argv0;

  internal::InitGoogleMockImpl(&argc, argv);
}

}  // namespace testing