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gmock-internal-utils.cc
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30 // Author: wan@google.com (Zhanyong Wan)
31 
32 // Google Mock - a framework for writing C++ mock classes.
33 //
34 // This file defines some utilities useful for implementing Google
35 // Mock. They are subject to change without notice, so please DO NOT
36 // USE THEM IN USER CODE.
37 
39 
40 #include <ctype.h>
41 #include <ostream> // NOLINT
42 #include <string>
43 #include "gmock/gmock.h"
45 #include "gtest/gtest.h"
46 
47 namespace testing {
48 namespace internal {
49 
50 // Converts an identifier name to a space-separated list of lower-case
51 // words. Each maximum substring of the form [A-Za-z][a-z]*|\d+ is
52 // treated as one word. For example, both "FooBar123" and
53 // "foo_bar_123" are converted to "foo bar 123".
54 GTEST_API_ string ConvertIdentifierNameToWords(const char* id_name) {
55  string result;
56  char prev_char = '\0';
57  for (const char* p = id_name; *p != '\0'; prev_char = *(p++)) {
58  // We don't care about the current locale as the input is
59  // guaranteed to be a valid C++ identifier name.
60  const bool starts_new_word = IsUpper(*p) ||
61  (!IsAlpha(prev_char) && IsLower(*p)) ||
62  (!IsDigit(prev_char) && IsDigit(*p));
63 
64  if (IsAlNum(*p)) {
65  if (starts_new_word && result != "")
66  result += ' ';
67  result += ToLower(*p);
68  }
69  }
70  return result;
71 }
72 
73 // This class reports Google Mock failures as Google Test failures. A
74 // user can define another class in a similar fashion if he intends to
75 // use Google Mock with a testing framework other than Google Test.
76 class GoogleTestFailureReporter : public FailureReporterInterface {
77  public:
78  virtual void ReportFailure(FailureType type, const char* file, int line,
79  const string& message) {
80  AssertHelper(type == kFatal ?
83  file,
84  line,
85  message.c_str()) = Message();
86  if (type == kFatal) {
87  posix::Abort();
88  }
89  }
90 };
91 
92 // Returns the global failure reporter. Will create a
93 // GoogleTestFailureReporter and return it the first time called.
94 GTEST_API_ FailureReporterInterface* GetFailureReporter() {
95  // Points to the global failure reporter used by Google Mock. gcc
96  // guarantees that the following use of failure_reporter is
97  // thread-safe. We may need to add additional synchronization to
98  // protect failure_reporter if we port Google Mock to other
99  // compilers.
100  static FailureReporterInterface* const failure_reporter =
102  return failure_reporter;
103 }
104 
105 // Protects global resources (stdout in particular) used by Log().
106 static GTEST_DEFINE_STATIC_MUTEX_(g_log_mutex);
107 
108 // Returns true iff a log with the given severity is visible according
109 // to the --gmock_verbose flag.
112  // Always show the log if --gmock_verbose=info.
113  return true;
114  } else if (GMOCK_FLAG(verbose) == kErrorVerbosity) {
115  // Always hide it if --gmock_verbose=error.
116  return false;
117  } else {
118  // If --gmock_verbose is neither "info" nor "error", we treat it
119  // as "warning" (its default value).
120  return severity == kWarning;
121  }
122 }
123 
124 // Prints the given message to stdout iff 'severity' >= the level
125 // specified by the --gmock_verbose flag. If stack_frames_to_skip >=
126 // 0, also prints the stack trace excluding the top
127 // stack_frames_to_skip frames. In opt mode, any positive
128 // stack_frames_to_skip is treated as 0, since we don't know which
129 // function calls will be inlined by the compiler and need to be
130 // conservative.
131 GTEST_API_ void Log(LogSeverity severity,
132  const string& message,
133  int stack_frames_to_skip) {
134  if (!LogIsVisible(severity))
135  return;
136 
137  // Ensures that logs from different threads don't interleave.
138  MutexLock l(&g_log_mutex);
139 
140  // "using ::std::cout;" doesn't work with Symbian's STLport, where cout is a
141  // macro.
142 
143  if (severity == kWarning) {
144  // Prints a GMOCK WARNING marker to make the warnings easily searchable.
145  std::cout << "\nGMOCK WARNING:";
146  }
147  // Pre-pends a new-line to message if it doesn't start with one.
148  if (message.empty() || message[0] != '\n') {
149  std::cout << "\n";
150  }
151  std::cout << message;
152  if (stack_frames_to_skip >= 0) {
153 #ifdef NDEBUG
154  // In opt mode, we have to be conservative and skip no stack frame.
155  const int actual_to_skip = 0;
156 #else
157  // In dbg mode, we can do what the caller tell us to do (plus one
158  // for skipping this function's stack frame).
159  const int actual_to_skip = stack_frames_to_skip + 1;
160 #endif // NDEBUG
161 
162  // Appends a new-line to message if it doesn't end with one.
163  if (!message.empty() && *message.rbegin() != '\n') {
164  std::cout << "\n";
165  }
166  std::cout << "Stack trace:\n"
168  ::testing::UnitTest::GetInstance(), actual_to_skip);
169  }
170  std::cout << ::std::flush;
171 }
172 
173 } // namespace internal
174 } // namespace testing