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java - Mockito 没有嘲笑该方法

问题描述

我正在尝试为一种方法编写一个测试用例，但我猜该方法并没有被嘲笑。

这是响应返回 null 的方法：

      response = httpClient.makeRequest(HttpMethod.POST, params.getUrl(), request, headers, null, param1.getRequest().getId(),
          param1, false);

实际方法：

  public HttpResponse makeRequest(String method, String url, String param, Header[] headers, String serviceName, String requestId,
      className param1, Boolean useProxy) throws SystemException {
....
....
....
return httpResponse;
}

这是受人尊敬的方法的模拟代码：

Mockito.when(httpClient.makeRequest(Mockito.anyString(), Mockito.anyString(), Mockito.anyString(), Mockito.any(), Mockito.anyString(), Mockito.anyString(), Mockito.any(), Mockito.anyBoolean())).thenReturn(response);

我得到的例外：

com.morfeus.workflow.exception.WorkflowException: java.lang.NullPointerException

    at com.morfeus.workflow.processor.WebhookProcessor.process(WebhookProcessor.java:164)
    at com.morfeus.workflow.processor.script.WebhookScriptProcessorTest.process(WebhookScriptProcessorTest.java:157)
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
    at java.lang.reflect.Method.invoke(Method.java:498)
    at org.junit.runners.model.FrameworkMethod$1.runReflectiveCall(FrameworkMethod.java:50)
    at org.junit.internal.runners.model.ReflectiveCallable.run(ReflectiveCallable.java:12)
    at org.junit.runners.model.FrameworkMethod.invokeExplosively(FrameworkMethod.java:47)
    at org.junit.internal.runners.statements.InvokeMethod.evaluate(InvokeMethod.java:17)
    at org.springframework.test.context.junit4.statements.RunBeforeTestExecutionCallbacks.evaluate(RunBeforeTestExecutionCallbacks.java:74)
    at org.springframework.test.context.junit4.statements.RunAfterTestExecutionCallbacks.evaluate(RunAfterTestExecutionCallbacks.java:84)
    at org.junit.internal.runners.statements.RunBefores.evaluate(RunBefores.java:26)
    at org.springframework.test.context.junit4.statements.RunBeforeTestMethodCallbacks.evaluate(RunBeforeTestMethodCallbacks.java:75)
    at org.springframework.test.context.junit4.statements.RunAfterTestMethodCallbacks.evaluate(RunAfterTestMethodCallbacks.java:86)
    at org.springframework.test.context.junit4.statements.SpringRepeat.evaluate(SpringRepeat.java:84)
    at org.junit.runners.ParentRunner.runLeaf(ParentRunner.java:325)
    at org.springframework.test.context.junit4.SpringJUnit4ClassRunner.runChild(SpringJUnit4ClassRunner.java:251)
    at org.springframework.test.context.junit4.SpringJUnit4ClassRunner.runChild(SpringJUnit4ClassRunner.java:97)
    at org.junit.runners.ParentRunner$3.run(ParentRunner.java:290)
    at org.junit.runners.ParentRunner$1.schedule(ParentRunner.java:71)
    at org.junit.runners.ParentRunner.runChildren(ParentRunner.java:288)
    at org.junit.runners.ParentRunner.access$000(ParentRunner.java:58)
    at org.junit.runners.ParentRunner$2.evaluate(ParentRunner.java:268)
    at org.springframework.test.context.junit4.statements.RunBeforeTestClassCallbacks.evaluate(RunBeforeTestClassCallbacks.java:61)
    at org.springframework.test.context.junit4.statements.RunAfterTestClassCallbacks.evaluate(RunAfterTestClassCallbacks.java:70)
    at org.junit.runners.ParentRunner.run(ParentRunner.java:363)
    at org.springframework.test.context.junit4.SpringJUnit4ClassRunner.run(SpringJUnit4ClassRunner.java:190)
    at org.junit.runner.JUnitCore.run(JUnitCore.java:137)
    at com.intellij.junit4.JUnit4IdeaTestRunner.startRunnerWithArgs(JUnit4IdeaTestRunner.java:68)
    at com.intellij.rt.execution.junit.IdeaTestRunner$Repeater.startRunnerWithArgs(IdeaTestRunner.java:47)
    at com.intellij.rt.execution.junit.JUnitStarter.prepareStreamsAndStart(JUnitStarter.java:242)
    at com.intellij.rt.execution.junit.JUnitStarter.main(JUnitStarter.java:70)
Caused by: java.lang.NullPointerException
    at com.morfeus.workflow.processor.WebhookProcessor.process(WebhookProcessor.java:151)
    ... 32 more

标签： javaspringjunitnullpointerexceptionmockito

解决方案

你正在通过null但期待anyString()。

从文档，

从 Mockito 2.1.0 开始，只允许非空字符串。由于这是一个可为空的引用，因此建议匹配空包装器的 API 是 isNull()。我们认为这种变化将使测试工具比 Mockito 1.x 更安全。

改为使用isNull。

修改为，

Mockito.when(httpClient.makeRequest(Mockito.anyString(), Mockito.anyString(), Mockito.anyString(), Mockito.any(), Mockito.isNull(), Mockito.anyString(), Mockito.any(), Mockito.anyBoolean())).thenReturn(response);

或者不通过null。

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