Add support for expectations, which allow properties to be specified and then verified in tests.
Signed-off-by: Brendan Higgins brendanhiggins@google.com --- include/kunit/test.h | 259 +++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 259 insertions(+)
diff --git a/include/kunit/test.h b/include/kunit/test.h index 68320fa2452de..d652825d7296f 100644 --- a/include/kunit/test.h +++ b/include/kunit/test.h @@ -273,4 +273,263 @@ void __printf(3, 4) test_printk(const char *level, #define test_err(test, fmt, ...) \ test_printk(KERN_ERR, test, fmt, ##__VA_ARGS__)
+static inline struct test_stream *test_expect_start(struct test *test, + const char *file, + const char *line) +{ + struct test_stream *stream = test_new_stream(test); + + stream->add(stream, "EXPECTATION FAILED at %s:%s\n\t", file, line); + + return stream; +} + +static inline void test_expect_end(struct test *test, + bool success, + struct test_stream *stream) +{ + if (!success) + test->fail(test, stream); + else + stream->clear(stream); +} + +#define TEST_EXPECT_START(test) \ + test_expect_start(test, __FILE__, __stringify(__LINE__)) + +#define TEST_EXPECT_END(test, success, stream) \ + test_expect_end(test, success, stream) + +#define TEST_EXPECT(test, success, message) do { \ + struct test_stream *__stream = TEST_EXPECT_START(test); \ + \ + __stream->add(__stream, message); \ + TEST_EXPECT_END(test, success, __stream); \ +} while (0) + +/** + * TEST_SUCCEED() - A no-op expectation. Only exists for code clarity. + * @test: The test context object. + * + * The opposite of TEST_FAIL(), it is an expectation that cannot fail. In other + * words, it does nothing and only exists for code clarity. See + * TEST_EXPECT_TRUE() for more information. + */ +#define TEST_SUCCEED(test) do {} while (0) + +/** + * TEST_FAIL() - Always causes a test to fail when evaluated. + * @test: The test context object. + * @message: an informational message to be printed when the assertion is made. + * + * The opposite of TEST_SUCCEED(), it is an expectation that always fails. In + * other words, it always results in a failed expectation, and consequently + * always causes the test case to fail when evaluated. See TEST_EXPECT_TRUE() + * for more information. + */ +#define TEST_FAIL(test, message) TEST_EXPECT(test, false, message) + +/** + * TEST_EXPECT_TRUE() - Causes a test failure when the expression is not true. + * @test: The test context object. + * @condition: an arbitrary boolean expression. The test fails when this does + * not evaluate to true. + * + * This and expectations of the form `TEST_EXPECT_*` will cause the test case to + * fail when the specified condition is not met; however, it will not prevent + * the test case from continuing to run; this is otherwise known as an + * *expectation failure*. + */ +#define TEST_EXPECT_TRUE(test, condition) \ + TEST_EXPECT(test, (condition), \ + "Expected " #condition " is true, but is false.") + +/** + * TEST_EXPECT_FALSE() - Causes a test failure when the expression is not false. + * @test: The test context object. + * @condition: an arbitrary boolean expression. The test fails when this does + * not evaluate to false. + * + * Sets an expectation that @condition evaluates to false. See + * TEST_EXPECT_TRUE() for more information. + */ +#define TEST_EXPECT_FALSE(test, condition) \ + TEST_EXPECT(test, !(condition), \ + "Expected " #condition " is false, but is true.") + +static inline void test_expect_binary(struct test *test, + long long left, const char *left_name, + long long right, const char *right_name, + bool compare_result, + const char *compare_name, + const char *file, + const char *line) +{ + struct test_stream *stream = test_expect_start(test, file, line); + + stream->add(stream, + "Expected %s %s %s, but\n", + left_name, compare_name, right_name); + stream->add(stream, "\t\t%s == %lld\n", left_name, left); + stream->add(stream, "\t\t%s == %lld", right_name, right); + + test_expect_end(test, compare_result, stream); +} + +/* + * A factory macro for defining the expectations for the basic comparisons + * defined for the built in types. + * + * Unfortunately, there is no common type that all types can be promoted to for + * which all the binary operators behave the same way as for the actual types + * (for example, there is no type that long long and unsigned long long can + * both be cast to where the comparison result is preserved for all values). So + * the best we can do is do the comparison in the original types and then coerce + * everything to long long for printing; this way, the comparison behaves + * correctly and the printed out value usually makes sense without + * interpretation, but can always be interpretted to figure out the actual + * value. + */ +#define TEST_EXPECT_BINARY(test, left, condition, right) do { \ + typeof(left) __left = (left); \ + typeof(right) __right = (right); \ + test_expect_binary(test, \ + (long long) __left, #left, \ + (long long) __right, #right, \ + __left condition __right, #condition, \ + __FILE__, __stringify(__LINE__)); \ +} while (0) + +/** + * TEST_EXPECT_EQ() - Sets an expectation that @left and @right are equal. + * @test: The test context object. + * @left: an arbitrary expression that evaluates to a primitive C type. + * @right: an arbitrary expression that evaluates to a primitive C type. + * + * Sets an expectation that the values that @left and @right evaluate to are + * equal. This is semantically equivalent to + * TEST_EXPECT_TRUE(@test, (@left) == (@right)). See TEST_EXPECT_TRUE() for more + * information. + */ +#define TEST_EXPECT_EQ(test, left, right) \ + TEST_EXPECT_BINARY(test, left, ==, right) + +/** + * TEST_EXPECT_NE() - An expectation that @left and @right are not equal. + * @test: The test context object. + * @left: an arbitrary expression that evaluates to a primitive C type. + * @right: an arbitrary expression that evaluates to a primitive C type. + * + * Sets an expectation that the values that @left and @right evaluate to are not + * equal. This is semantically equivalent to + * TEST_EXPECT_TRUE(@test, (@left) != (@right)). See TEST_EXPECT_TRUE() for more + * information. + */ +#define TEST_EXPECT_NE(test, left, right) \ + TEST_EXPECT_BINARY(test, left, !=, right) + +/** + * TEST_EXPECT_LT() - An expectation that @left is less than @right. + * @test: The test context object. + * @left: an arbitrary expression that evaluates to a primitive C type. + * @right: an arbitrary expression that evaluates to a primitive C type. + * + * Sets an expectation that the value that @left evaluates to is less than the + * value that @right evaluates to. This is semantically equivalent to + * TEST_EXPECT_TRUE(@test, (@left) < (@right)). See TEST_EXPECT_TRUE() for more + * information. + */ +#define TEST_EXPECT_LT(test, left, right) \ + TEST_EXPECT_BINARY(test, left, <, right) + +/** + * TEST_EXPECT_LE() - An expectation that @left is less than or equal to @right. + * @test: The test context object. + * @left: an arbitrary expression that evaluates to a primitive C type. + * @right: an arbitrary expression that evaluates to a primitive C type. + * + * Sets an expectation that the value that @left evaluates to is less than or + * equal to the value that @right evaluates to. Semantically this is equivalent + * to TEST_EXPECT_TRUE(@test, (@left) <= (@right)). See TEST_EXPECT_TRUE() for + * more information. + */ +#define TEST_EXPECT_LE(test, left, right) \ + TEST_EXPECT_BINARY(test, left, <=, right) + +/** + * TEST_EXPECT_GT() - An expectation that @left is greater than @right. + * @test: The test context object. + * @left: an arbitrary expression that evaluates to a primitive C type. + * @right: an arbitrary expression that evaluates to a primitive C type. + * + * Sets an expectation that the value that @left evaluates to is greater than + * the value that @right evaluates to. This is semantically equivalent to + * TEST_EXPECT_TRUE(@test, (@left) > (@right)). See TEST_EXPECT_TRUE() for more + * information. + */ +#define TEST_EXPECT_GT(test, left, right) \ + TEST_EXPECT_BINARY(test, left, >, right) + +/** + * TEST_EXPECT_GE() - Expects that @left is greater than or equal to @right. + * @test: The test context object. + * @left: an arbitrary expression that evaluates to a primitive C type. + * @right: an arbitrary expression that evaluates to a primitive C type. + * + * Sets an expectation that the value that @left evaluates to is greater than + * the value that @right evaluates to. This is semantically equivalent to + * TEST_EXPECT_TRUE(@test, (@left) >= (@right)). See TEST_EXPECT_TRUE() for more + * information. + */ +#define TEST_EXPECT_GE(test, left, right) \ + TEST_EXPECT_BINARY(test, left, >=, right) + +/** + * TEST_EXPECT_STREQ() - An expectation that strings @left and @right are equal. + * @test: The test context object. + * @left: an arbitrary expression that evaluates to a null terminated string. + * @right: an arbitrary expression that evaluates to a null terminated string. + * + * Sets an expectation that the values that @left and @right evaluate to are + * equal. This is semantically equivalent to + * TEST_EXPECT_TRUE(@test, !strcmp((@left), (@right))). See TEST_EXPECT_TRUE() + * for more information. + */ +#define TEST_EXPECT_STREQ(test, left, right) do { \ + struct test_stream *__stream = TEST_EXPECT_START(test); \ + typeof(left) __left = (left); \ + typeof(right) __right = (right); \ + \ + __stream->add(__stream, "Expected " #left " == " #right ", but\n"); \ + __stream->add(__stream, "\t\t%s == %s\n", #left, __left); \ + __stream->add(__stream, "\t\t%s == %s\n", #right, __right); \ + \ + TEST_EXPECT_END(test, !strcmp(left, right), __stream); \ +} while (0) + +/** + * TEST_EXPECT_NOT_ERR_OR_NULL() - Expects that @ptr is not null and not err. + * @test: The test context object. + * @ptr: an arbitrary pointer. + * + * Sets an expectation that the value that @ptr evaluates to is not null and not + * an errno stored in a pointer. This is semantically equivalent to + * TEST_EXPECT_TRUE(@test, !IS_ERR_OR_NULL(@ptr)). See TEST_EXPECT_TRUE() for + * more information. + */ +#define TEST_EXPECT_NOT_ERR_OR_NULL(test, ptr) do { \ + struct test_stream *__stream = TEST_EXPECT_START(test); \ + typeof(ptr) __ptr = (ptr); \ + \ + if (!__ptr) \ + __stream->add(__stream, \ + "Expected " #ptr " is not null, but is."); \ + if (IS_ERR(__ptr)) \ + __stream->add(__stream, \ + "Expected " #ptr " is not error, but is: %ld", \ + PTR_ERR(__ptr)); \ + \ + TEST_EXPECT_END(test, !IS_ERR_OR_NULL(__ptr), __stream); \ +} while (0) + #endif /* _KUNIT_TEST_H */