googletest/googlemock/include/gmock/gmock-more-matchers.h

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// Author: marcus.boerger@google.com (Marcus Boerger)

// Google Mock - a framework for writing C++ mock classes.
//
// This file implements some matchers that depend on gmock-generated-matchers.h.
//
// Note that tests are implemented in gmock-matchers_test.cc rather than
// gmock-more-matchers-test.cc.

#ifndef GMOCK_GMOCK_MORE_MATCHERS_H_
#define GMOCK_GMOCK_MORE_MATCHERS_H_

#include "gmock/gmock-generated-matchers.h"

namespace testing {

// The macros trigger warning C4100 (unreferenced formal
// parameter) in MSVC with -W4.  Unfortunately they cannot be fixed in
// the macro definition, as the warnings are generated when the macro
// is expanded and macro expansion cannot contain #pragma.  Therefore
// we suppress them here.
#ifdef _MSC_VER
# pragma warning(push)
# pragma warning(disable:4100)
#endif

// Defines a matcher that matches an empty container. The container must
// support both size() and empty(), which all STL-like containers provide.
MATCHER(IsEmpty, negation ? "isn't empty" : "is empty") {
  if (arg.empty()) {
    return true;
  }
  *result_listener << "whose size is " << arg.size();
  return false;
}

// Define a matcher that matches a value that evaluates in boolean
// context to true.  Useful for types that define "explicit operator
// bool" operators and so can't be compared for equality with true
// and false.
MATCHER(IsTrue, negation ? "is false" : "is true") {
  return static_cast<bool>(arg);
}

// Define a matcher that matches a value that evaluates in boolean
// context to false.  Useful for types that define "explicit operator
// bool" operators and so can't be compared for equality with true
// and false.
MATCHER(IsFalse, negation ? "is true" : "is false") {
  return !static_cast<bool>(arg);
}

}  // namespace testing

#endif  // GMOCK_GMOCK_MORE_MATCHERS_H_