Constexpr tests

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Macros
#define	PW_CONSTEXPR_TEST(test_suite, test_name, ...)

Macro Definition Documentation

PW_CONSTEXPR_TEST

#define PW_CONSTEXPR_TEST	(		test_suite,
			test_name,
			...
	)

Value:

  _PW_IF_CONSTEXPR_TEST(constexpr)                                       \
  void PwConstexprTest_##test_suite##_##test_name() __VA_ARGS__          \
                                                                         \
  TEST(test_suite, test_name) {                                          \
    PwConstexprTest_##test_suite##_##test_name();                        \
  }                                                                      \
                                                                         \
  static_assert([] {                                                     \
    _PW_IF_CONSTEXPR_TEST(PwConstexprTest_##test_suite##_##test_name();) \
    return true;                                                         \
  }())

Defines a test that is executed both at compile time in a static_assert and as a regular GoogleTest-style TEST().

PW_CONSTEXPR_TEST works similarly to the GoogleTest TEST() macro, but has some differences.

• All tested code must be constexpr.
• Requires the PW_TEST_* prefixed versions of GoogleTest's EXPECT_* and ASSERT_* macros.
• The function body is a macro argument. This has two implications:
  • The function body cannot contain preprocessor directives, such as #define. If these are needed, move them to a separate function that is called from the test.
  • The PW_CONSTEXPR_TEST macro must be terminated with ); after the test body argument.

Parameters

test_suite	GoogleTest test suite name
test_name	GoogleTest test name
...	test function body surrounded by { }.