gtest学习之断言

最新推荐文章于 2024-11-20 22:35:52 发布

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本文深入探讨了GTest中断言的宏分类，包括ASSERT系列和EXPECT系列，详细解释了每种断言的工作原理及用法，并通过实例展示了如何在测试中运用这些断言来验证函数行为。

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gtest中，断言的宏可以理解分为两类：一类是ASSERT系列，另一类是EXPECT系列。

ASSERT系列的断言----当检查点失败时，退出当前函数；

EXPECT系列的断言----当检查点失败时，继续往下执行。

样例：

//int型比较，预期值：3，实际值：Add(1， 2)
EXPECT_EQ(3, Add(1, 2)

如果Add(1, 2)的结果为5时，会在结果中输出：

g:\myproject\c++\gtestdemo\gtestdemo\gtestdemo.cpp(16): error: Value of: Add(1, 2)
Actual: 4
Expected:3

布尔值检查的宏：

数值型数据检查：

字符串检查：

Fatal assertion	Nonfatal assertion	Verifies
`ASSERT_STREQ(`expected_str`,` actual_str`)`	`EXPECT_STREQ(`expected_str`,` actual_str`)`	the two C strings have the same content
`ASSERT_STRNE(`str1`,` str2`)`	`EXPECT_STRNE(`str1`,` str2`)`	the two C strings have different content
`ASSERT_STRCASEEQ(`expected_str`,` actual_str`)`	`EXPECT_STRCASEEQ(`expected_str`,` actual_str`)`	the two C strings have the same content, ignoring case
`ASSERT_STRCASENE(`str1`,` str2`)`	`EXPECT_STRCASENE(`str1`,` str2`)`	the two C strings have different content, ignoring case

显示返回成功或失败

Fatal assertion	Nonfatal assertion
FAIL()	ADD_FAILURE()

异常检查：

Fatal assertion	Nonfatal assertion	Verifies
`ASSERT_THROW(`statement, exception_type`)`	`EXPECT_THROW(`statement, exception_type`)`	statement throws an exception of the given type
`ASSERT_ANY_THROW(`statement`)`	`EXPECT_ANY_THROW(`statement`)`	statement throws an exception of any type
`ASSERT_NO_THROW(`statement`)`	`EXPECT_NO_THROW(`statement`)`	statement doesn't throw any exception

检查浮点数：

Fatal assertion	Nonfatal assertion	Verifies
`ASSERT_FLOAT_EQ(`expected, actual`)`	`EXPECT_FLOAT_EQ(`expected, actual`)`	the two `float` values are almost equal
`ASSERT_DOUBLE_EQ(`expected, actual`)`	`EXPECT_DOUBLE_EQ(`expected, actual`)`	the two `double` values are almost equal

Windows HRESULT assertions

Fatal assertion	Nonfatal assertion	Verifies
`ASSERT_HRESULT_SUCCEEDED(`expression`)`	`EXPECT_HRESULT_SUCCEEDED(`expression`)`	expression is a success `HRESULT`
`ASSERT_HRESULT_FAILED(`expression`)`	`EXPECT_HRESULT_FAILED(`expression`)`	expression is a failure `HRESULT`