Java 电源模拟单元测试具有 Thread.Sleep 的方法

Question

我正在尝试对调用 Thread.sleep.

的方法进行单元测试

public Boolean waitForUpscale(){
   String res = someObject.upTheResources();
   Thread.sleep(20000);
   Boolean status = someObject.checkForStatus();
   return status;
}

在测试这个时，测试也会因为Thread.sleep而睡眠，我必须在测试时避免测试进入睡眠状态。

更新：

我添加了这个测试：

@Test
    public void downscaleTest() throws Exception {
        when(someservice.downScaleResources()).thenReturn("DONE");
        PowerMockito.mockStatic(Thread.class);
        doNothing().when(Thread.class, "sleep", anyLong());
        Boolean res = Whitebox.invokeMethod(myController, "downscaleALL");

        assertTrue(res);
    }

当我调试它时它起作用了。但是当我运行测试正常时，它没有给出以下异常：

0 matchers expected, 1 recorded:

-> at com.mypackage.controller.MyController.downscaleALL(MyControllerTest.java:265)

This exception may occur if matchers are combined with raw values:
    //incorrect:
    someMethod(anyObject(), "raw String");
When using matchers, all arguments have to be provided by matchers.
For example:
    //correct:
    someMethod(anyObject(), eq("String by matcher"));

For more info see javadoc for Matchers class.

添加 downScaleAll 方法

private Boolean downscaleALL() {
    try {
        String downScaleResources = someservice.downScaleResources();
        if (downScaleResources.equals("DONE")) {
            Thread.sleep(20000); // 20s
            log.info("DOWNSCALING THE RESOURCES NOW");
            return true;
        }

        return false;
    } catch (Exception e) {
        log.error("Error while downscaling the resources");
        log.error(e.toString());
        return false;
    }
}

Answer 1

你应该只 mock types you own 所以，如果你想模拟对 Thread.sleep() 的调用，你应该将其提取到你拥有的类型中（例如 ThreadSleeper），因此可以模拟.更好的是，如果可以的话，重写以避免睡眠。睡眠通常是一种代码气味（偷工减料）。

Answer 2

我同意@Elevate 提到的，你不应该模拟你不拥有的类型。但是如果你还要做，你可以这样做

@RunWith(PowerMockRunner.class)
@PrepareForTest({<ClassWherewaitForUpscaleFunctionisLocated>.class, Thread.class})
public class Mytest {
    @Test
    public void testStaticVoid() throws Exception {

        PowerMockito.mockStatic(Thread.class);
        doNothing().when(Thread.class, "sleep", anyLong());
        .........
    }
}

Java 电源模拟单元测试具有 Thread.Sleep 的方法

Java power mock unit test a method having Thread.Sleep

java

unit-testing

powermock