在Jmockit停止嘲笑

Posted 2021-05-05

我正在使用JMockit。我在嘲笑一种方法。我想在应该调用实际方法之后应该调用一次模拟方法。我正在提供我正在使用的代码。

package StopMocking;
public class ClassToMock 
{
    public int methodToMock()
    {
        return 2;
    }
}

这是我正在测试的课程

package StopMocking;
public class ClassToTest 
{
    public void methodToTest()
    {
        ClassToMock classToMockInstance = new ClassToMock();
        System.out.println(""+classToMockInstance.methodToMock());
    }
}

这是测试类。

package StopMocking;
import org.junit.Test;
import mockit.Mocked;
import mockit.NonStrictExpectations;
public class TestAClass 
{
    @Mocked("methodToMock") ClassToMock classToMockMockedInstance;
    @Test
    public void test1()
    {

        new Expectations(classToMockMockedInstance)
        {
            {
            classToMockMockedInstance.methodToMock();returns(1);
            }
        };

        (new ClassToTest()).methodToTest();
        //Some code for stoping mocking
        (new ClassToTest()).methodToTest();//It should display 2

    }
}

当我使用新的Expectations（classToMockMockedInstance）时，它会抛出此异常

mockit.internal.MissingInvocation: Missing invocation of:
StopMocking.ClassToMock#methodToMock()
   on mock instance: StopMocking.ClassToMock@15093f1
    at org.eclipse.jdt.internal.junit4.runner.JUnit4TestReference.run(JUnit4TestReference.java:50)
    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)
Caused by: Missing invocation
    at StopMocking.ClassToMock.methodToMock(ClassToMock.java)
    at StopMocking.TestAClass$1.<init>(TestAClass.java:21)
    at StopMocking.TestAClass.test1(TestAClass.java:18)
    ... 6 more

答案

编写测试的一种方法是使用部分模拟和严格的期望如下：

public class TestAClass 
{
    @Test
    public void test1()
    {
        final ClassToMock classToMockInstance = new ClassToMock();

        new Expectations(ClassToMock.class) {{
            classToMockInstance.methodToMock(); result = 1;
        }};

        new ClassToTest().methodToTest(); // prints "1"

        // This time the real method implementation will be executed:
        new ClassToTest().methodToTest(); // prints "2"
    }
}