Android重建专案，套件org.junit不存在错误

问题描述

Error:(3, 17) error: package org.junit does not exist
Error:(5, 24) error: package org.junit does not exist
Error:(11, 6) error: cannot find symbol class Test
Error:(13, 9) error: cannot find symbol method assertEquals(int,int)
:app:compileDebugUnitTestJavaWithJavac FAILED
Error:Execution failed for task ':app:compileDebugUnitTestJavaWithJavac'

.

当我进行重建时，会出现那些错误.但是我可以运行我的应用程序而无需重建.

When i run rebuild, errors are those. But i can run my appwithout rebuild.

我不使用测试，我不知道它如何进入我的文件夹.

I dont use test, i dont know how it came to my folders.

代码是:

import org.junit.Test;

import static org.junit.Assert.*;

/**
 * To work on unit tests, switch the Test Artifact in the Build Variants view.
 */
public class ExampleUnitTest {
    @Test
    public void addition_isCorrect() throws Exception {
        assertEquals(4, 2 + 2);
    }
}

推荐答案

将此添加到您的build.gradle

Add this to your build.gradle

dependencies {
    ...
    testCompile 'junit:junit:4.12'
}

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