带有时间依赖数据的单位测试没有PowerMock
我的班级有一种方法，该方法试图执行一些操作，并在完成所有操作后返回纳米时间。测试此方法时，我会遇到问题，测试结果总是不同的（因为取决于当前时间）。
如何正确测试返回值？没有Powermock有没有办法？
示例类：
class ExampleClass {
public long performOperationsAndGetTimeNano(){
//some operations...
return Instant.now().getNano();
}
...
}
示例测试：
@ExtendWith(MockitoExtension.class)
class ExampleTest{
private static final long EXPECTED_TIME = 555927900L;
private ExampleClass subject;
//init...
@Test
void performOperationAndGetTimeNano(){
long actualTime = subject.performOperationAndGetTimeNano(); //always different result
assertEquals(EXPECTED_TIME, actualTime); //always fails
}
}
感谢您的回答！
My class has a method, that tries to perform some operations and return nano time after all operations are completed. When testing this method I get a problem, that test result is always different (because depends on current time).
How to test return value correctly? Is there way without PowerMock?
Example class:
class ExampleClass {
public long performOperationsAndGetTimeNano(){
//some operations...
return Instant.now().getNano();
}
...
}
Example test:
@ExtendWith(MockitoExtension.class)
class ExampleTest{
private static final long EXPECTED_TIME = 555927900L;
private ExampleClass subject;
//init...
@Test
void performOperationAndGetTimeNano(){
long actualTime = subject.performOperationAndGetTimeNano(); //always different result
assertEquals(EXPECTED_TIME, actualTime); //always fails
}
}
Thanks for your answers!
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评论（1）
问题：如何正确测试返回值？
fix： endiss_time = endured_time +（curtime_in_nanosec -endife_time），time Digit直到nano秒（偏移时间到当前nano secction secction secction secction xecreds_time）
实际_time = bucess.porformoperationandgetTimenano（） - 这给出了时间数字直到nano seconds
private static final final long endive_time_time = getExpedlongTime（）;
在模拟的Java类中的Long GetExpedlongTime（）{}方法，上面的类别在上面提供了预期_time。注意在Mockito中，每个输入数据都由具有示例输入数据的模拟Java类模拟。
B.没有Powermock有没有办法？ 修复：是的，有上面的简单junit。不需要嘲笑的Java课，我们可以像A.一样编写单独的方法，并像上述一样使用
。希望我回答了您的两个问题。
Question: How to test return value correctly?
Fix: EXPECTED_TIME = EXPECTED_TIME + (CURTIME_IN_NANOSEC - EXPECTED_TIME), time digit till nano seconds(offset time till current nano second add to EXPECTED_TIME)
ACTUAL_TIME = subject.performOperationAndGetTimeNano()--This gives time digit till nano seconds
private static final long EXPECTED_TIME = getExpectedLongTime();
long getExpectedLongTime(){} method in mocked java class and used in above class gives EXPECTED_TIME as above. Note in Mockito, Every input data is mocked by Mock java class which has sample Input Data.
B. Is there way without PowerMock? Fix: Yes there is, Simple JUnit like above. No need for mocked java class, we can write seperate method and use like above as in A.
Hope I Answered both your questions.