googletest/googlemock/test/gmock_ex_test.cc

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// Tests Google Mock's functionality that depends on exceptions.

#include <exception>

#include "gmock/gmock.h"
#include "gtest/gtest.h"

#if GTEST_HAS_EXCEPTIONS
namespace {

using testing::HasSubstr;

using testing::internal::GoogleTestFailureException;

// A type that cannot be default constructed.
class NonDefaultConstructible {
 public:
  explicit NonDefaultConstructible(int /* dummy */) {}
};

class MockFoo {
 public:
  // A mock method that returns a user-defined type.  Google Mock
  // doesn't know what the default value for this type is.
  MOCK_METHOD0(GetNonDefaultConstructible, NonDefaultConstructible());
};

TEST(DefaultValueTest, ThrowsRuntimeErrorWhenNoDefaultValue) {
  MockFoo mock;
  try {
    // No expectation is set on this method, so Google Mock must
    // return the default value.  However, since Google Mock knows
    // nothing about the return type, it doesn't know what to return,
    // and has to throw (when exceptions are enabled) or abort
    // (otherwise).
    mock.GetNonDefaultConstructible();
    FAIL() << "GetNonDefaultConstructible()'s return type has no default "
           << "value, so Google Mock should have thrown.";
  } catch (const GoogleTestFailureException& /* unused */) {
    FAIL() << "Google Test does not try to catch an exception of type "
           << "GoogleTestFailureException, which is used for reporting "
           << "a failure to other testing frameworks.  Google Mock should "
           << "not throw a GoogleTestFailureException as it will kill the "
           << "entire test program instead of just the current TEST.";
  } catch (const std::exception& ex) {
    EXPECT_THAT(ex.what(), HasSubstr("has no default value"));
  }
}

}  // unnamed namespace
#endif