java - 将 EclEmma(eclipse 插件)与 JMockit 一起使用时出错(仅与 Delegate() 一起使用)

Question

我最近开始使用 JMockit，并且对 TDD 和模拟非常陌生。我喜欢使用代码覆盖率来确保我已经测试了给定类/方法的所有行。

我在尝试 JMockit(Delegate() 功能)和代码覆盖率时遇到了以下错误。我包括通过和失败的测试。

我不确定我是否做错了什么？

我想知道是否还有其他人遇到过此问题，是否有任何解决方法或修复可用？

我什至不确定这是 JMockit 问题还是 EclEmma 问题。谢谢。

我的设置:

• 操作系统:Windows XP
• JDK-JRE:1.7.0
• JUnit:4.11
• JMockit:1.3
• EclEmma:2.2.1.201306092145
• eclipse :3.6

失败跟踪:

java.lang.IllegalArgumentException: No compatible method found: getType(java.lang.Integer) at com.ps.jmockit.samples.DelegateCoverageTest$Dog.getAnimalType(DelegateCoverageTest.java:99) at com.ps.jmockit.samples.DelegateCoverageTest.coverageFails(DelegateCoverageTest.java:71) at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at java.lang.reflect.Method.invoke(Method.java:601) at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at java.lang.reflect.Method.invoke(Method.java:601) 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)

---

代码:(与 EclEmma 一起使用时，coverageFails() 将显示上述错误)

package com.ps.jmockit.samples;

import static org.hamcrest.MatcherAssert.*;
import static org.hamcrest.Matchers.*;

import mockit.Delegate;
import mockit.Expectations;
import mockit.Mocked;

import org.junit.Test;

/**
 *  As of 7/25/2013, if I try to run the EclEmma coverage tool, it fails for {@link #coverageFails()}
 */
public class DelegateCoverageTest
{

    @Mocked
    Animal  fakeAnimal;

    @Test
    public void coverageWorks()
    {
        final String fake = "Fake";

        new Expectations()
        {
            {
                DelegateCoverageTest.this.fakeAnimal.getType(1);
                result = fake;
            }
        };

        //Arrange
        final Dog dog = new Dog();

        // Act
        final String animalType = dog.getAnimalType(this.fakeAnimal);

        // Assert
        assertThat(animalType, is(fake));
    }

    @Test
    public void coverageFails()
    {
        final String one = "One";
        final String two = "Two";

        new Expectations()
        {
            {
                DelegateCoverageTest.this.fakeAnimal.getType(anyInt);
                result = new Delegate()
                {
                    @SuppressWarnings("unused")
                    String aDelegateMethod( final int input )
                    {
                        return input == 1
                                ? one
                                : two;
                    }
                };
            }
        };

        //Arrange
        final Dog dog = new Dog();

        // Act
        final String animalType = dog.getAnimalType(this.fakeAnimal);

        // Assert
        assertThat(animalType, is(one));
    }


    //----------------- SUPPORTING CLASSES -----------------//

    interface Animal
    {
        String getType(int input);
    }

    class Mammal implements Animal
    {
        @Override
        public String getType(final int input)
        {
            return "Mammal";
        }
    }

    class Dog
    {

        public String getAnimalType(final Animal animal)
        {
            return animal.getType(1);
        }
    }

}

Answer 1

似乎是一个错误:我在这里看到相关链接:https://github.com/jacoco/eclemma/issues/9在这里:https://github.com/jacoco/jacoco/issues/35