Question

我在Android Studio中创建一个新模块，然后在gradle中添加一些依赖项。这是我的gradle文件

apply plugin: 'com.android.application'
android {
    compileSdkVersion 24
    buildToolsVersion "24.0.0"

    defaultConfig {
        applicationId "com.example.freddy.myapplication"
        minSdkVersion 19
        targetSdkVersion 24
        versionCode 1
        versionName "1.0"

        testInstrumentationRunner "android.support.test.runner.AndroidJUnitRunner"
    }
    buildTypes {
        release {
            minifyEnabled false
            proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'
        }
    }
}

dependencies {
    compile fileTree(dir: 'libs', include: ['*.jar'])
    testCompile 'junit:junit:4.12'
    compile 'com.android.support:appcompat-v7:24.1.1'

    // Required -- JUnit 4 framework
    testCompile 'junit:junit:4.12'
    // Optional -- Mockito framework
    testCompile 'org.mockito:mockito-core:1.10.19'

    androidTestCompile 'com.android.support.test:runner:0.5'
    // Set this dependency to use JUnit 4 rules
    androidTestCompile 'com.android.support.test:rules:0.5'
    // Set this dependency to build and run Espresso tests
    androidTestCompile('com.android.support.test.espresso:espresso-core:2.2.2'){
        exclude group: 'com.android.support', module: 'support-annotations'
    }
    //RecycleViews Espresso supports
    androidTestCompile('com.android.support.test.espresso:espresso-contrib:2.2.2') {
        exclude module: 'support-annotations'
        exclude module: 'design'
        exclude module: 'recyclerview-v7'
    }
    // Set this dependency to build and run UI Automator tests
    androidTestCompile 'com.android.support.test.uiautomator:uiautomator-v18:2.1.2'
    androidTestCompile 'com.android.support:support-annotations:24.1.1'
    configurations.all {
        resolutionStrategy.force 'com.google.code.findbugs:jsr305:1.3.9'
    }

然后我在androidTest / java / com / example / freddy / myapplication下创建一个MainActivityTest类：

package com.example.freddy.myapplication;
import android.support.test.rule.ActivityTestRule;
import android.support.test.runner.AndroidJUnit4;

import org.junit.Rule;
import org.junit.Test;
import org.junit.runner.RunWith;

import static android.support.test.espresso.Espresso.onView;
import static android.support.test.espresso.assertion.ViewAssertions.matches;
import static android.support.test.espresso.matcher.ViewMatchers.withId;
import static android.support.test.espresso.matcher.ViewMatchers.withText;
import static org.junit.Assert.*;

/**
 * Created by freddy on 2016/11/30.
 */
@RunWith(AndroidJUnit4.class)
public class MainActivityTest {

    @Rule
    public ActivityTestRule<MainActivity> mActivityTestRule = new ActivityTestRule<MainActivity>(MainActivity.class);

    @Test
    public void testTextView(){
        onView(withId(R.id.tv_text)).check(matches(withText("Hello World!")));
    }
}

当我运行测试时，错误交叉

java.lang.NoClassDefFoundError: com.example.freddy.myapplication.MainActivity
at com.example.freddy.myapplication.MainActivityTest.<init>(MainActivityTest.java:22)
at java.lang.reflect.Constructor.constructNative(Native Method)
at java.lang.reflect.Constructor.newInstance(Constructor.java:423)
at org.junit.runners.BlockJUnit4ClassRunner.createTest(BlockJUnit4ClassRunner.java:217)
at org.junit.runners.BlockJUnit4ClassRunner$1.runReflectiveCall(BlockJUnit4ClassRunner.java:266)
at org.junit.internal.runners.model.ReflectiveCallable.run(ReflectiveCallable.java:12)
at org.junit.runners.BlockJUnit4ClassRunner.methodBlock(BlockJUnit4ClassRunner.java:263)
at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:78)
at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:57)
at org.junit.runners.ParentRunner$3.run(ParentRunner.java:290)
at org.junit.runners.ParentRunner$1.schedule(ParentRunner.java:71)
at org.junit.runners.ParentRunner.runChildren(ParentRunner.java:288)
at org.junit.runners.ParentRunner.access$000(ParentRunner.java:58)
at org.junit.runners.ParentRunner$2.evaluate(ParentRunner.java:268)
at org.junit.runners.ParentRunner.run(ParentRunner.java:363)
at org.junit.runners.Suite.runChild(Suite.java:128)
at org.junit.runners.Suite.runChild(Suite.java:27)
at org.junit.runners.ParentRunner$3.run(ParentRunner.java:290)
at org.junit.runners.ParentRunner$1.schedule(ParentRunner.java:71)
at org.junit.runners.ParentRunner.runChildren(ParentRunner.java:288)
at org.junit.runners.ParentRunner.access$000(ParentRunner.java:58)
at org.junit.runners.ParentRunner$2.evaluate(ParentRunner.java:268)
at org.junit.runners.ParentRunner.run(ParentRunner.java:363)
at org.junit.runner.JUnitCore.run(JUnitCore.java:137)
at org.junit.runner.JUnitCore.run(JUnitCore.java:115)
at android.support.test.internal.runner.TestExecutor.execute(TestExecutor.java:59)
at android.support.test.runner.AndroidJUnitRunner.onStart(AndroidJUnitRunner.java:262)
at android.app.Instrumentation$InstrumentationThread.run(Instrumentation.java:1701)

Tests ran to completion.

有人有同样的问题吗？

我发现当我评论这些代码时

    @Rule
    public ActivityTestRule<MainActivity> mActivityTestRule = new ActivityTestRule<>(MainActivity.class);

并删除

onView(withId(R.id.tv_text)).check(matches(withText("Hello World!")));

然后运行测试，一切都很好。只能加载MainActivity.但实际上，MainActivity在main / java / com / example / freddy / myapplication下，当我使用@Rule时无法加载它

Answer 1

根据developer.android的链接，源代码说要在src / test目录中创建测试类以进行单元测试 -

在Android Studio项目中，您必须存储源文件本地单元测试 module-name / src / test / java / 。这个目录已经在您创建新项目时存在。

在执行测试之前，请确保项目已同步。（来自同一链接）

单击同步，确保您的项目与Gradle同步工具栏中的项目。

对于UI-testing部分，您应将测试添加到

要使用Android Studio自动执行UI测试，您需要实施测试代码在一个单独的Android测试文件夹中（ src / androidTest / java ）

作为NoClassDefFoundError在新Moudle中

1 个答案: