java - junit/mockito 中的断言不正确

Question

有测试方法:

public boolean isFoo(SomeObj someObj) {
        if(someObj != null) {
            return bean.filter(someObj.getValue()) || (!bean.filter(someObj.getValue()) && !someObj.isParameter());
        } else {
            return true;
        }
    }

并且有测试类:

@RunWith(MockitoJUnitRunner.class)
public class OtherBeanTest{

    @Mock
    private OtherBean otherBean ;

    @Mock
    private Bean bean;

    @Test
    public void test() {
        SomeObj someObj = new SomeObj().value("value").parameter(false);

        when(bean.filter(anyString())).thenReturn(false);

        System.out.println(otherBean.isFoo(someObj));
        System.out.println(bean.filter(someObj.getValue()) || (!bean.filter(someObj.getValue()) && !someObj.isParameter()));

        Assert.assertTrue(otherBean.isFoo(someObj));
    }

问题是断言返回错误:

java.lang.AssertionError
    at org.junit.Assert.fail(Assert.java:86)
    at org.junit.Assert.assertTrue(Assert.java:41)
    at org.junit.Assert.assertTrue(Assert.java:52)
    at OtherBeanTest.java)
    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:47)
    at org.junit.internal.runners.model.ReflectiveCallable.run(ReflectiveCallable.java:12)
    at org.junit.runners.model.FrameworkMethod.invokeExplosively(FrameworkMethod.java:44)
    at org.junit.internal.runners.statements.InvokeMethod.evaluate(InvokeMethod.java:17)
    at org.junit.internal.runners.statements.RunBefores.evaluate(RunBefores.java:26)
    at org.junit.runners.ParentRunner.runLeaf(ParentRunner.java:271)
    at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:70)
    at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:50)
    at org.junit.runners.ParentRunner$3.run(ParentRunner.java:238)
    at org.junit.runners.ParentRunner$1.schedule(ParentRunner.java:63)
    at org.junit.runners.ParentRunner.runChildren(ParentRunner.java:236)
    at org.junit.runners.ParentRunner.access$000(ParentRunner.java:53)
    at org.junit.runners.ParentRunner$2.evaluate(ParentRunner.java:229)
    at org.junit.runners.ParentRunner.run(ParentRunner.java:309)
    at org.mockito.internal.runners.JUnit45AndHigherRunnerImpl.run(JUnit45AndHigherRunnerImpl.java:37)
    at org.mockito.runners.MockitoJUnitRunner.run(MockitoJUnitRunner.java:62)
    at org.junit.runner.JUnitCore.run(JUnitCore.java:160)
    at com.intellij.junit4.JUnit4IdeaTestRunner.startRunnerWithArgs(JUnit4IdeaTestRunner.java:68)
    at com.intellij.rt.junit.IdeaTestRunner$Repeater.startRunnerWithArgs(IdeaTestRunner.java:33)
    at com.intellij.rt.junit.JUnitStarter.prepareStreamsAndStart(JUnitStarter.java:230)
    at com.intellij.rt.junit.JUnitStarter.main(JUnitStarter.java:58)

虽然 printLine 分别返回 false 和 true，但这是不正确的。问题出在哪里？

另外，我的 Intellij Idea 有问题 - 它跳过模拟类中设置的断点，我不知道为什么。

Answer 1

在您的代码中，otherBean 只是一个模拟，您可以在模拟上调用 isFoo()，而不告诉它返回任何特定值。 boolean 返回方法返回的默认值为false。

我不确定您的计划是什么，但我不认为您试图这样做。

如果您打算测试 OtherBean，那么您需要一个实际的对象并注入(inject)依赖项的模拟。它可能看起来像这样:

public class OtherBeanTest{

  @Mock
  private Bean bean;

  @Test
  public void test() {
    SomeObj someObj = new SomeObj().value("value").parameter(false);

    when(bean.filter(anyString())).thenReturn(false);
    OtherBean otherBean = new OtherBean();
    otherBean.setBean(bean);

    Assert.assertTrue(otherBean.isFoo(someObj));
  }
}