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  1. // Copyright 2008, Google Inc.
  2. // All rights reserved.
  3. //
  4. // Redistribution and use in source and binary forms, with or without
  5. // modification, are permitted provided that the following conditions are
  6. // met:
  7. //
  8. //     * Redistributions of source code must retain the above copyright
  9. // notice, this list of conditions and the following disclaimer.
  10. //     * Redistributions in binary form must reproduce the above
  11. // copyright notice, this list of conditions and the following disclaimer
  12. // in the documentation and/or other materials provided with the
  13. // distribution.
  14. //     * Neither the name of Google Inc. nor the names of its
  15. // contributors may be used to endorse or promote products derived from
  16. // this software without specific prior written permission.
  17. //
  18. // THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
  19. // "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
  20. // LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
  21. // A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
  22. // OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
  23. // SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
  24. // LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  25. // DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  26. // THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  27. // (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
  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.  
  34. namespace testing {
  35.  
  36. // FIXME: support using environment variables to
  37. // control the flag values, like what Google Test does.
  38.  
  39. GMOCK_DEFINE_bool_(catch_leaked_mocks, true,
  40.                    "true iff Google Mock should report leaked mock objects "
  41.                    "as failures.");
  42.  
  43. GMOCK_DEFINE_string_(verbose, internal::kWarningVerbosity,
  44.                      "Controls how verbose Google Mock's output is."
  45.                      "  Valid values:\n"
  46.                      "  info    - prints all messages.\n"
  47.                      "  warning - prints warnings and errors.\n"
  48.                      "  error   - prints errors only.");
  49.  
  50. GMOCK_DEFINE_int32_(default_mock_behavior, 1,
  51.                     "Controls the default behavior of mocks."
  52.                     "  Valid values:\n"
  53.                     "  0 - by default, mocks act as NiceMocks.\n"
  54.                     "  1 - by default, mocks act as NaggyMocks.\n"
  55.                     "  2 - by default, mocks act as StrictMocks.");
  56.  
  57. namespace internal {
  58.  
  59. // Parses a string as a command line flag.  The string should have the
  60. // format "--gmock_flag=value".  When def_optional is true, the
  61. // "=value" part can be omitted.
  62. //
  63. // Returns the value of the flag, or NULL if the parsing failed.
  64. static const char* ParseGoogleMockFlagValue(const char* str,
  65.                                             const char* flag,
  66.                                             bool def_optional) {
  67.   // str and flag must not be NULL.
  68.   if (str == NULL || flag == NULL) return NULL;
  69.  
  70.   // The flag must start with "--gmock_".
  71.   const std::string flag_str = std::string("--gmock_") + flag;
  72.   const size_t flag_len = flag_str.length();
  73.   if (strncmp(str, flag_str.c_str(), flag_len) != 0) return NULL;
  74.  
  75.   // Skips the flag name.
  76.   const char* flag_end = str + flag_len;
  77.  
  78.   // When def_optional is true, it's OK to not have a "=value" part.
  79.   if (def_optional && (flag_end[0] == '\0')) {
  80.     return flag_end;
  81.   }
  82.  
  83.   // If def_optional is true and there are more characters after the
  84.   // flag name, or if def_optional is false, there must be a '=' after
  85.   // the flag name.
  86.   if (flag_end[0] != '=') return NULL;
  87.  
  88.   // Returns the string after "=".
  89.   return flag_end + 1;
  90. }
  91.  
  92. // Parses a string for a Google Mock bool flag, in the form of
  93. // "--gmock_flag=value".
  94. //
  95. // On success, stores the value of the flag in *value, and returns
  96. // true.  On failure, returns false without changing *value.
  97. static bool ParseGoogleMockBoolFlag(const char* str, const char* flag,
  98.                                     bool* value) {
  99.   // Gets the value of the flag as a string.
  100.   const char* const value_str = ParseGoogleMockFlagValue(str, flag, true);
  101.  
  102.   // Aborts if the parsing failed.
  103.   if (value_str == NULL) return false;
  104.  
  105.   // Converts the string value to a bool.
  106.   *value = !(*value_str == '0' || *value_str == 'f' || *value_str == 'F');
  107.   return true;
  108. }
  109.  
  110. // Parses a string for a Google Mock string flag, in the form of
  111. // "--gmock_flag=value".
  112. //
  113. // On success, stores the value of the flag in *value, and returns
  114. // true.  On failure, returns false without changing *value.
  115. template <typename String>
  116. static bool ParseGoogleMockStringFlag(const char* str, const char* flag,
  117.                                       String* value) {
  118.   // Gets the value of the flag as a string.
  119.   const char* const value_str = ParseGoogleMockFlagValue(str, flag, false);
  120.  
  121.   // Aborts if the parsing failed.
  122.   if (value_str == NULL) return false;
  123.  
  124.   // Sets *value to the value of the flag.
  125.   *value = value_str;
  126.   return true;
  127. }
  128.  
  129. static bool ParseGoogleMockIntFlag(const char* str, const char* flag,
  130.                                    int* value) {
  131.   // Gets the value of the flag as a string.
  132.   const char* const value_str = ParseGoogleMockFlagValue(str, flag, true);
  133.  
  134.   // Aborts if the parsing failed.
  135.   if (value_str == NULL) return false;
  136.  
  137.   // Sets *value to the value of the flag.
  138.   return ParseInt32(Message() << "The value of flag --" << flag,
  139.                     value_str, value);
  140. }
  141.  
  142. // The internal implementation of InitGoogleMock().
  143. //
  144. // The type parameter CharType can be instantiated to either char or
  145. // wchar_t.
  146. template <typename CharType>
  147. void InitGoogleMockImpl(int* argc, CharType** argv) {
  148.   // Makes sure Google Test is initialized.  InitGoogleTest() is
  149.   // idempotent, so it's fine if the user has already called it.
  150.   InitGoogleTest(argc, argv);
  151.   if (*argc <= 0) return;
  152.  
  153.   for (int i = 1; i != *argc; i++) {
  154.     const std::string arg_string = StreamableToString(argv[i]);
  155.     const char* const arg = arg_string.c_str();
  156.  
  157.     // Do we see a Google Mock flag?
  158.     if (ParseGoogleMockBoolFlag(arg, "catch_leaked_mocks",
  159.                                 &GMOCK_FLAG(catch_leaked_mocks)) ||
  160.         ParseGoogleMockStringFlag(arg, "verbose", &GMOCK_FLAG(verbose)) ||
  161.         ParseGoogleMockIntFlag(arg, "default_mock_behavior",
  162.                                &GMOCK_FLAG(default_mock_behavior))) {
  163.       // Yes.  Shift the remainder of the argv list left by one.  Note
  164.       // that argv has (*argc + 1) elements, the last one always being
  165.       // NULL.  The following loop moves the trailing NULL element as
  166.       // well.
  167.       for (int j = i; j != *argc; j++) {
  168.         argv[j] = argv[j + 1];
  169.       }
  170.  
  171.       // Decrements the argument count.
  172.       (*argc)--;
  173.  
  174.       // We also need to decrement the iterator as we just removed
  175.       // an element.
  176.       i--;
  177.     }
  178.   }
  179. }
  180.  
  181. }  // namespace internal
  182.  
  183. // Initializes Google Mock.  This must be called before running the
  184. // tests.  In particular, it parses a command line for the flags that
  185. // Google Mock recognizes.  Whenever a Google Mock flag is seen, it is
  186. // removed from argv, and *argc is decremented.
  187. //
  188. // No value is returned.  Instead, the Google Mock flag variables are
  189. // updated.
  190. //
  191. // Since Google Test is needed for Google Mock to work, this function
  192. // also initializes Google Test and parses its flags, if that hasn't
  193. // been done.
  194. GTEST_API_ void InitGoogleMock(int* argc, char** argv) {
  195.   internal::InitGoogleMockImpl(argc, argv);
  196. }
  197.  
  198. // This overloaded version can be used in Windows programs compiled in
  199. // UNICODE mode.
  200. GTEST_API_ void InitGoogleMock(int* argc, wchar_t** argv) {
  201.   internal::InitGoogleMockImpl(argc, argv);
  202. }
  203.  
  204. }  // namespace testing
  205.