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author | Abseil Team <absl-team@google.com> | 2020-12-11 19:20:17 (GMT) |
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committer | Andy Getz <durandal@google.com> | 2020-12-12 03:11:39 (GMT) |
commit | 18f8200e3079b0e54fa00cb7ac55d4c39dcf6da6 (patch) | |
tree | c3e7cca278f9b4ad1182471b9ffcacbc59de3384 /googlemock/include/gmock/gmock-nice-strict.h | |
parent | 5a509dbd2e5a6c694116e329c5a20dc190653724 (diff) | |
download | googletest-18f8200e3079b0e54fa00cb7ac55d4c39dcf6da6.zip googletest-18f8200e3079b0e54fa00cb7ac55d4c39dcf6da6.tar.gz googletest-18f8200e3079b0e54fa00cb7ac55d4c39dcf6da6.tar.bz2 |
Googletest export
Add static_asserts that verify that no class hierarchy contains more than one
of {NiceMock, NaggyMock, StrictMock}. This sort of nesting has always been
disallowed, but this CL adds a compile-time check to prevent it.
PiperOrigin-RevId: 347037822
Diffstat (limited to 'googlemock/include/gmock/gmock-nice-strict.h')
-rw-r--r-- | googlemock/include/gmock/gmock-nice-strict.h | 71 |
1 files changed, 43 insertions, 28 deletions
diff --git a/googlemock/include/gmock/gmock-nice-strict.h b/googlemock/include/gmock/gmock-nice-strict.h index a5579af..69afa1b 100644 --- a/googlemock/include/gmock/gmock-nice-strict.h +++ b/googlemock/include/gmock/gmock-nice-strict.h @@ -63,14 +63,44 @@ #ifndef GMOCK_INCLUDE_GMOCK_GMOCK_NICE_STRICT_H_ #define GMOCK_INCLUDE_GMOCK_GMOCK_NICE_STRICT_H_ +#include <type_traits> + #include "gmock/gmock-spec-builders.h" #include "gmock/internal/gmock-port.h" namespace testing { +template <class MockClass> +class NiceMock; +template <class MockClass> +class NaggyMock; +template <class MockClass> +class StrictMock; + +namespace internal { +template <typename T> +std::true_type StrictnessModifierProbe(const NiceMock<T>&); +template <typename T> +std::true_type StrictnessModifierProbe(const NaggyMock<T>&); +template <typename T> +std::true_type StrictnessModifierProbe(const StrictMock<T>&); +std::false_type StrictnessModifierProbe(...); + +template <typename T> +constexpr bool HasStrictnessModifier() { + return decltype(StrictnessModifierProbe(std::declval<const T&>()))::value; +} + +} // namespace internal template <class MockClass> class NiceMock : public MockClass { public: + static_assert( + !internal::HasStrictnessModifier<MockClass>(), + "Can't apply NiceMock to a class hierarchy that already has a " + "strictness modifier. See " + "https://github.com/google/googletest/blob/master/googlemock/docs/" + "cook_book.md#the-nice-the-strict-and-the-naggy-nicestrictnaggy"); NiceMock() : MockClass() { ::testing::Mock::AllowUninterestingCalls( internal::ImplicitCast_<MockClass*>(this)); @@ -108,6 +138,13 @@ class NiceMock : public MockClass { template <class MockClass> class NaggyMock : public MockClass { + static_assert( + !internal::HasStrictnessModifier<MockClass>(), + "Can't apply NaggyMock to a class hierarchy that already has a " + "strictness modifier. See " + "https://github.com/google/googletest/blob/master/googlemock/docs/" + "cook_book.md#the-nice-the-strict-and-the-naggy-nicestrictnaggy"); + public: NaggyMock() : MockClass() { ::testing::Mock::WarnUninterestingCalls( @@ -147,6 +184,12 @@ class NaggyMock : public MockClass { template <class MockClass> class StrictMock : public MockClass { public: + static_assert( + !internal::HasStrictnessModifier<MockClass>(), + "Can't apply StrictMock to a class hierarchy that already has a " + "strictness modifier. See " + "https://github.com/google/googletest/blob/master/googlemock/docs/" + "cook_book.md#the-nice-the-strict-and-the-naggy-nicestrictnaggy"); StrictMock() : MockClass() { ::testing::Mock::FailUninterestingCalls( internal::ImplicitCast_<MockClass*>(this)); @@ -182,34 +225,6 @@ class StrictMock : public MockClass { GTEST_DISALLOW_COPY_AND_ASSIGN_(StrictMock); }; -// The following specializations catch some (relatively more common) -// user errors of nesting nice and strict mocks. They do NOT catch -// all possible errors. - -// These specializations are declared but not defined, as NiceMock, -// NaggyMock, and StrictMock cannot be nested. - -template <typename MockClass> -class NiceMock<NiceMock<MockClass> >; -template <typename MockClass> -class NiceMock<NaggyMock<MockClass> >; -template <typename MockClass> -class NiceMock<StrictMock<MockClass> >; - -template <typename MockClass> -class NaggyMock<NiceMock<MockClass> >; -template <typename MockClass> -class NaggyMock<NaggyMock<MockClass> >; -template <typename MockClass> -class NaggyMock<StrictMock<MockClass> >; - -template <typename MockClass> -class StrictMock<NiceMock<MockClass> >; -template <typename MockClass> -class StrictMock<NaggyMock<MockClass> >; -template <typename MockClass> -class StrictMock<StrictMock<MockClass> >; - } // namespace testing #endif // GMOCK_INCLUDE_GMOCK_GMOCK_NICE_STRICT_H_ |