Android编程入门-第57天

最新推荐文章于 2024-04-21 23:18:37 发布

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本文通过两个具体例子介绍如何使用JUnit框架进行单元测试。首先展示了简单的加法运算测试，确保基本数学运算正确；其次深入探讨了SoundViewModel组件的测试，包括声音名称的验证及按钮点击触发播放功能的模拟。

今天进行单元测试代码的编写

ExampleUnitTest.java

import org.junit.Test;

import static org.junit.Assert.*;

public class ExampleUnitTest {
    @Test
    public void addition_isCorrect() throws Exception {
        assertEquals(4, 2 + 2);
    }
}

SoundViewModelTest.java

import org.junit.Before;
import org.junit.Test;

import static org.hamcrest.core.Is.is;
import static org.junit.Assert.*;
import static org.mockito.Mockito.mock;
import static org.mockito.Mockito.verify;

public class SoundViewModelTest {
    private BeatBox mBeatBox;
    private Sound mSound;
    private SoundViewModel mSubject;

    @Before
    public void setUp() throws Exception {
        mBeatBox = mock(BeatBox.class);
        mSound = new Sound("assetPath");
        mSubject = new SoundViewModel(mBeatBox);
        mSubject.setSound(mSound);
    }

    @Test
    public void exposesSoundNameAsTitle() {
        assertThat(mSubject.getTitle(), is(mSound.getName()));
    }

    @Test
    public void callsBeatBoxPlayOnButtonClicked() {
        mSubject.onButtonClicked();
        verify(mBeatBox).play(mSound);
    }
}