'IllegalStateException:在方法调用之前缺少行为定义',即使已定义行为

Question

我从easymock和JUnit测试用例中得到了一些莫名其妙的行为.我收到了IllegalStateException: missing behavior definition for the preceeding method call: myCollaborator.getCurrentApplyDate() Usage is: expect(a.foo()).andXXX().我正在使用easymock 3.1来模拟myCollaborator正在测试的JUnit 4测试类classUnderTest.

classUnderTest需要打两次电话myCollaborator.只需一个电话,一切正常.@Before我的JUnit测试类中的setup方法:

@Before
public void setUp() throws Exception {
    mockCollaborator = EasyMock.createMock(MyCollaborator.class);
    classUnderTest = new myObject(mockCollaborator);
    data = new MyDTO();
    // other setup code for data omitted
    EasyMock.expect(mockCollaborator.getCurrentApplyDate()).andReturn(new java.sql.Date(123456789));
    // comment out this expectation for now so it works
    // EasyMock.expect(mockCollaborator.getCurrentBatch()).andReturn("123");
    EasyMock.replay();
}

在classUnderTest.process()说我与两个调用测试方法myCollaborator,第二个注释掉,使其工作:

public MyDTO process(MyDTO data) throws Exception {
    // do some stuff to data
    java.sql.Date myDate = myCollaborator.getCurrentApplyDate();
    // do some stuff with myDate and data
    // comment out this call for now so it works
    // String currentBatch = myCollaborator.getCurrentBatch();
    // do some other stuff with currentBatch and data
    return data;
}

一旦我myCollaborator.getCurrentBatch()从process()方法取消注释第二个调用(一个)并取消注释JUnit的期望,setUp()我开始接收前面提到的IllegalStateException.

那些未注释的代码不起作用:

@Before
public void setUp() throws Exception {
    mockCollaborator = EasyMock.createMock(MyCollaborator.class);
    classUnderTest = new myObject(mockCollaborator);
    data = new MyDTO();
    // other setup code for data omitted
    EasyMock.expect(mockCollaborator.getCurrentApplyDate()).andReturn(new java.sql.Date(123456789));
    EasyMock.expect(mockCollaborator.getCurrentBatch()).andReturn("123");
    EasyMock.replay();
}

public MyDTO process(MyDTO data) throws Exception {
    // do some stuff to data
    java.sql.Date myDate = myCollaborator.getCurrentApplyDate();
    // do some stuff with myDate and data
    String currentBatch = myCollaborator.getCurrentBatch();
    // do some other stuff with currentBatch and data
    return data;
}

这两种方法的返回类型java.sql.Date和String正确.这些方法只是听起来像吸气剂; 他们所做的就是返回实例变量值; 在这些getter方法中不会发生其他处理或方法调用.

JUnit测试方法:

@Test
public void testSomeFunctionality(){
    // alter data to setup this test case
    try {
        data = classUnderTest.process(data);
    } catch (Exception e) {
        // this is line 531, where the IllegalStateException is being caught
        fail("error msg " + e);
    }
    assertTrue(data.getSomeValue() == expectedValue)
}

完整堆栈跟踪:

java.lang.AssertionError: An unexpected exception has occurred:
java.lang.IllegalStateException: missing behavior definition for the preceding method call:
MyCollaborator.getCurrentApplyDate()
Usage is: expect(a.foo()).andXXX()
at org.junit.Assert.fail(Assert.java:91)
at qualified.package.name.ClassUnderTestTests.testSomeFunctionality(ClassUnderTestTests.java:531)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
at java.lang.reflect.Method.invoke(Method.java:597)
at org.junit.runners.model.FrameworkMethod$1.runReflectiveCall(FrameworkMethod.java:44)
at org.junit.internal.runners.model.ReflectiveCallable.run(ReflectiveCallable.java:15)
at org.junit.runners.model.FrameworkMethod.invokeExplosively(FrameworkMethod.java:41)
at org.junit.internal.runners.statements.InvokeMethod.evaluate(InvokeMethod.java:20)
at org.junit.internal.runners.statements.RunBefores.evaluate(RunBefores.java:28)
at org.junit.internal.runners.statements.RunAfters.evaluate(RunAfters.java:31)
at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:76)
at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:50)
at org.junit.runners.ParentRunner$3.run(ParentRunner.java:193)
at org.junit.runners.ParentRunner$1.schedule(ParentRunner.java:52)
at org.junit.runners.ParentRunner.runChildren(ParentRunner.java:191)
at org.junit.runners.ParentRunner.access$000(ParentRunner.java:42)
at org.junit.runners.ParentRunner$2.evaluate(ParentRunner.java:184)
at org.junit.runners.ParentRunner.run(ParentRunner.java:236)
at org.eclipse.jdt.internal.junit4.runner.JUnit4TestReference.run(JUnit4TestReference.java:49)
at org.eclipse.jdt.internal.junit.runner.TestExecution.run(TestExecution.java:38)
at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:467)
at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:683)
at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.run(RemoteTestRunner.java:390)
at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.main(RemoteTestRunner.java:197)

我过去以这种方式广泛使用了easymock和JUnit,之前从未碰到过类似的东西.我的同事们同样受到了阻碍,因此任何能够对这里发生的事情有所了解的人都可以获得奖励.

Answer 1

在您的@Before示例中,您显示:

EasyMock.replay();

不应该这样:

EasyMock.replay(mockCollaborator);