Easymock isA与anyObject

问题描述

What is the difference between

EasyMock.isA(String.class)

和

EasyMock.anyObject(String.class)

（或提供的任何其他类）

(Or any other class supplied)

在什么情况下，您会使用另一个？

In what situations would would you use one over the other?

推荐答案

区别在于检查Null。当为null时，isA返回false，但对null而言，anyObject返回true。

The difference is in checking Nulls. The isA returns false when null but anyObject return true for null also.

import static org.easymock.EasyMock.*;
import org.easymock.EasyMock;
import org.testng.annotations.Test;


public class Tests {


    private IInterface createMock(boolean useIsA) {
        IInterface testInstance = createStrictMock(IInterface.class);
        testInstance.testMethod(
                useIsA ? isA(String.class) : anyObject(String.class)
        );
        expectLastCall();
        replay(testInstance);
        return testInstance;
    }
    private void runTest(boolean isACall, boolean isNull) throws Exception {
        IInterface testInstance = createMock(isACall);
        testInstance.testMethod(isNull ? null : "");
        verify(testInstance);
    }
    @Test
    public void testIsAWithString() throws Exception {
        runTest(true, false);
    }
    @Test
    public void testIsAWithNull() throws Exception {
        runTest(true, true);
    }
    @Test
    public void testAnyObjectWithString() throws Exception {
        runTest(false, true);
    }
    @Test
    public void testAnyObjectWithNull() throws Exception {
        runTest(false, false);
    }

    interface IInterface {
        void testMethod(String parameter);
    }
}

在该示例中，testIsAWithNull应该失败。

In the example the testIsAWithNull should fail.

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