C++ 在 GoogleTest 中使用 ASSERT 和 EXPECT
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Using ASSERT and EXPECT in GoogleTest
提问by martjno
While ASSERT_* macros cause termination of test case, EXPECT_* macros continue its evaluation. I would like to know which is the criteria to decide whether to use one or the other.
虽然 ASSERT_* 宏导致测试用例终止，但 EXPECT_* 宏继续其评估。我想知道决定使用一个还是另一个的标准是什么。
回答by GManNickG
Use ASSERTwhen the condition musthold - if it doesn't the test stops right there. Use this when the remainder of the test doesn't have semantic meaning without this condition holding.
ASSERT当条件必须成立时使用- 如果没有，测试就在那里停止。当测试的其余部分在没有此条件的情况下没有语义意义时使用此选项。
Use EXPECTwhen the condition shouldhold, but in cases where it doesn't we can still get value out of continuing the test. (The test will still ultimately fail at the end, though.)
EXPECT在条件应该成立时使用，但在条件不成立的情况下，我们仍然可以从继续测试中获得价值。（不过，测试最终仍会失败。）
The rule of thumb is: use EXPECTby default, unless you requiresomething to hold for the remainder of the tests, in which case you should use ASSERTfor that particular condition.
经验法则是：EXPECT默认使用，除非您需要为剩余的测试保留一些东西，在这种情况下，您应该ASSERT在特定条件下使用。
This is echoed within the primer:
这在引文中得到了回应：
Usually
EXPECT_*are preferred, as they allow more than one failures to be reported in a test. However, you should useASSERT_*if it doesn't make sense to continue when the assertion in question fails.
通常
EXPECT_*是首选，因为它们允许在测试中报告多个失败。但是，ASSERT_*如果在相关断言失败时继续没有意义，您应该使用。
回答by nabulke
Use EXPECT_when you
EXPECT_当你使用
- want to report more than one failure in your test
- 想要在测试中报告不止一个失败
Use ASSERT_when
使用ASSERT_时
- it doesn't make sense to continue when the assertion fails
- 当断言失败时继续是没有意义的
Since ASSERT_aborts your function immediately if it fails, possible cleanup code is skipped.
Prefer EXPECT_as your default.
由于ASSERT_如果函数失败会立即中止您的函数，因此可能会跳过可能的清理代码。首选EXPECT_作为您的默认值。
回答by Martin G
In addition to previous answers...
除了之前的回答...
ASSERT_does not terminate execution of the test case. It returns from whatever function is was used in. Besides failing the test case, it evaluates to return;, and this means that it cannot be used in a function returning something other than void. Unless you're fine with the compiler warning, that is.
ASSERT_不会终止测试用例的执行。它从任何使用过的函数返回。除了测试用例失败外，它的计算结果为return;，这意味着它不能用于返回除 之外的其他内容的函数中void。除非您对编译器警告没有意见，否则。
EXPECT_fails the test case but does not return;, so it can be used inside functions of any return type.
EXPECT_测试用例失败但没有失败return;，因此它可以在任何返回类型的函数中使用。
回答by ratkok
Check the following link: Effective C++ Testing Using GoogleTest(slide 23). There is a good guideline/advice on the use of EXPECT vs ASSERT.
检查以下链接：使用 GoogleTest 进行有效的 C++ 测试（幻灯片 23）。关于使用 EXPECT 与 ASSERT 有一个很好的指南/建议。
