1// Copyright 2008, Google Inc.
2// All rights reserved.
3//
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5// modification, are permitted provided that the following conditions are
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7//
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17//
18// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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28// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
29
30
31#include "gmock/gmock.h"
32#include "gmock/internal/gmock-port.h"
33
34namespace testing {
35
36GMOCK_DEFINE_bool_(catch_leaked_mocks, true,
37 "true if and only if Google Mock should report leaked "
38 "mock objects as failures.");
39
40GMOCK_DEFINE_string_(verbose, internal::kWarningVerbosity,
41 "Controls how verbose Google Mock's output is."
42 " Valid values:\n"
43 " info - prints all messages.\n"
44 " warning - prints warnings and errors.\n"
45 " error - prints errors only.");
46
47GMOCK_DEFINE_int32_(default_mock_behavior, 1,
48 "Controls the default behavior of mocks."
49 " Valid values:\n"
50 " 0 - by default, mocks act as NiceMocks.\n"
51 " 1 - by default, mocks act as NaggyMocks.\n"
52 " 2 - by default, mocks act as StrictMocks.");
53
54namespace internal {
55
56// Parses a string as a command line flag. The string should have the
57// format "--gmock_flag=value". When def_optional is true, the
58// "=value" part can be omitted.
59//
60// Returns the value of the flag, or NULL if the parsing failed.
61static const char* ParseGoogleMockFlagValue(const char* str,
62 const char* flag,
63 bool def_optional) {
64 // str and flag must not be NULL.
65 if (str == nullptr || flag == nullptr) return nullptr;
66
67 // The flag must start with "--gmock_".
68 const std::string flag_str = std::string("--gmock_") + flag;
69 const size_t flag_len = flag_str.length();
70 if (strncmp(str, flag_str.c_str(), flag_len) != 0) return nullptr;
71
72 // Skips the flag name.
73 const char* flag_end = str + flag_len;
74
75 // When def_optional is true, it's OK to not have a "=value" part.
76 if (def_optional && (flag_end[0] == '\0')) {
77 return flag_end;
78 }
79
80 // If def_optional is true and there are more characters after the
81 // flag name, or if def_optional is false, there must be a '=' after
82 // the flag name.
83 if (flag_end[0] != '=') return nullptr;
84
85 // Returns the string after "=".
86 return flag_end + 1;
87}
88
89// Parses a string for a Google Mock bool flag, in the form of
90// "--gmock_flag=value".
91//
92// On success, stores the value of the flag in *value, and returns
93// true. On failure, returns false without changing *value.
94static bool ParseGoogleMockBoolFlag(const char* str, const char* flag,
95 bool* value) {
96 // Gets the value of the flag as a string.
97 const char* const value_str = ParseGoogleMockFlagValue(str, flag, true);
98
99 // Aborts if the parsing failed.
100 if (value_str == nullptr) return false;
101
102 // Converts the string value to a bool.
103 *value = !(*value_str == '0' || *value_str == 'f' || *value_str == 'F');
104 return true;
105}
106
107// Parses a string for a Google Mock string flag, in the form of
108// "--gmock_flag=value".
109//
110// On success, stores the value of the flag in *value, and returns
111// true. On failure, returns false without changing *value.
112template <typename String>
113static bool ParseGoogleMockStringFlag(const char* str, const char* flag,
114 String* value) {
115 // Gets the value of the flag as a string.
116 const char* const value_str = ParseGoogleMockFlagValue(str, flag, false);
117
118 // Aborts if the parsing failed.
119 if (value_str == nullptr) return false;
120
121 // Sets *value to the value of the flag.
122 *value = value_str;
123 return true;
124}
125
126static bool ParseGoogleMockIntFlag(const char* str, const char* flag,
127 int32_t* value) {
128 // Gets the value of the flag as a string.
129 const char* const value_str = ParseGoogleMockFlagValue(str, flag, true);
130
131 // Aborts if the parsing failed.
132 if (value_str == nullptr) return false;
133
134 // Sets *value to the value of the flag.
135 return ParseInt32(Message() << "The value of flag --" << flag,
136 value_str, value);
137}
138
139// The internal implementation of InitGoogleMock().
140//
141// The type parameter CharType can be instantiated to either char or
142// wchar_t.
143template <typename CharType>
144void InitGoogleMockImpl(int* argc, CharType** argv) {
145 // Makes sure Google Test is initialized. InitGoogleTest() is
146 // idempotent, so it's fine if the user has already called it.
147 InitGoogleTest(argc, argv);
148 if (*argc <= 0) return;
149
150 for (int i = 1; i != *argc; i++) {
151 const std::string arg_string = StreamableToString(argv[i]);
152 const char* const arg = arg_string.c_str();
153
154 // Do we see a Google Mock flag?
155 if (ParseGoogleMockBoolFlag(arg, "catch_leaked_mocks",
156 &GMOCK_FLAG(catch_leaked_mocks)) ||
157 ParseGoogleMockStringFlag(arg, "verbose", &GMOCK_FLAG(verbose)) ||
158 ParseGoogleMockIntFlag(arg, "default_mock_behavior",
159 &GMOCK_FLAG(default_mock_behavior))) {
160 // Yes. Shift the remainder of the argv list left by one. Note
161 // that argv has (*argc + 1) elements, the last one always being
162 // NULL. The following loop moves the trailing NULL element as
163 // well.
164 for (int j = i; j != *argc; j++) {
165 argv[j] = argv[j + 1];
166 }
167
168 // Decrements the argument count.
169 (*argc)--;
170
171 // We also need to decrement the iterator as we just removed
172 // an element.
173 i--;
174 }
175 }
176}
177
178} // namespace internal
179
180// Initializes Google Mock. This must be called before running the
181// tests. In particular, it parses a command line for the flags that
182// Google Mock recognizes. Whenever a Google Mock flag is seen, it is
183// removed from argv, and *argc is decremented.
184//
185// No value is returned. Instead, the Google Mock flag variables are
186// updated.
187//
188// Since Google Test is needed for Google Mock to work, this function
189// also initializes Google Test and parses its flags, if that hasn't
190// been done.
191GTEST_API_ void InitGoogleMock(int* argc, char** argv) {
192 internal::InitGoogleMockImpl(argc, argv);
193}
194
195// This overloaded version can be used in Windows programs compiled in
196// UNICODE mode.
197GTEST_API_ void InitGoogleMock(int* argc, wchar_t** argv) {
198 internal::InitGoogleMockImpl(argc, argv);
199}
200
201// This overloaded version can be used on Arduino/embedded platforms where
202// there is no argc/argv.
203GTEST_API_ void InitGoogleMock() {
204 // Since Arduino doesn't have a command line, fake out the argc/argv arguments
205 int argc = 1;
206 const auto arg0 = "dummy";
207 char* argv0 = const_cast<char*>(arg0);
208 char** argv = &argv0;
209
210 internal::InitGoogleMockImpl(&argc, argv);
211}
212
213} // namespace testing
214