Android 使用浓缩咖啡时出现空指针异常
我想用浓缩咖啡。但是我犯了这个错误,我不知道我是否丢失了一些代码 任何想法都将受到高度赞赏 错误日志:Android 使用浓缩咖啡时出现空指针异常,android,android-espresso,Android,Android Espresso,我想用浓缩咖啡。但是我犯了这个错误,我不知道我是否丢失了一些代码 任何想法都将受到高度赞赏 错误日志: java.lang.NullPointerException: No instrumentation registered. Must run under a registering instrumentation. at com.google.android.apps.common.testing.testrunner.util.Checks.checkNotNull(Checks.
java.lang.NullPointerException: No instrumentation registered. Must run under a registering instrumentation.
at com.google.android.apps.common.testing.testrunner.util.Checks.checkNotNull(Checks.java:28)
at com.google.android.apps.common.testing.testrunner.InstrumentationRegistry.getInstance(InstrumentationRegistry.java:23)
at com.google.android.apps.common.testing.ui.espresso.base.BaseLayerModule.provideTargetContext(BaseLayerModule.java:50)
at com.google.android.apps.common.testing.ui.espresso.base.BaseLayerModule$$ModuleAdapter$ProvideTargetContextProvidesAdapter.get(BaseLayerModule$$ModuleAdapter.java:101)
at com.google.android.apps.common.testing.ui.espresso.base.BaseLayerModule$$ModuleAdapter$ProvideTargetContextProvidesAdapter.get(BaseLayerModule$$ModuleAdapter.java:85)
at com.google.android.apps.common.testing.ui.espresso.base.DefaultFailureHandler$$InjectAdapter.get(DefaultFailureHandler$$InjectAdapter.java:53)
at com.google.android.apps.common.testing.ui.espresso.base.DefaultFailureHandler$$InjectAdapter.get(DefaultFailureHandler$$InjectAdapter.java:20)
at com.google.android.apps.common.testing.ui.espresso.base.BaseLayerModule$$ModuleAdapter$ProvideFailureHanderProvidesAdapter.get(BaseLayerModule$$ModuleAdapter.java:555)
at com.google.android.apps.common.testing.ui.espresso.base.BaseLayerModule$$ModuleAdapter$ProvideFailureHanderProvidesAdapter.get(BaseLayerModule$$ModuleAdapter.java:519)
at com.google.android.apps.common.testing.ui.espresso.base.BaseLayerModule$FailureHandlerHolder$$InjectAdapter.get(BaseLayerModule$FailureHandlerHolder$$InjectAdapter.java:53)
at com.google.android.apps.common.testing.ui.espresso.base.BaseLayerModule$FailureHandlerHolder$$InjectAdapter.get(BaseLayerModule$FailureHandlerHolder$$InjectAdapter.java:20)
at dagger.internal.Linker$SingletonBinding.get(Linker.java:327)
at com.google.android.apps.common.testing.ui.espresso.base.BaseLayerModule$$ModuleAdapter$ProvideFailureHandlerProvidesAdapter.get(BaseLayerModule$$ModuleAdapter.java:505)
at com.google.android.apps.common.testing.ui.espresso.base.BaseLayerModule$$ModuleAdapter$ProvideFailureHandlerProvidesAdapter.get(BaseLayerModule$$ModuleAdapter.java:469)
at com.google.android.apps.common.testing.ui.espresso.ViewInteraction$$InjectAdapter.get(ViewInteraction$$InjectAdapter.java:65)
at com.google.android.apps.common.testing.ui.espresso.ViewInteraction$$InjectAdapter.get(ViewInteraction$$InjectAdapter.java:20)
at dagger.ObjectGraph$DaggerObjectGraph.get(ObjectGraph.java:251)
at com.google.android.apps.common.testing.ui.espresso.Espresso.onView(Espresso.java:58)
at com.example.espresso.TestExample.testCommand(TestExample.java:28)
at java.lang.reflect.Method.invokeNative(Native Method)
at android.test.InstrumentationTestCase.runMethod(InstrumentationTestCase.java:214)
at android.test.InstrumentationTestCase.runTest(InstrumentationTestCase.java:199)
at android.test.ActivityInstrumentationTestCase2.runTest(ActivityInstrumentationTestCase2.java:192)
at android.test.AndroidTestRunner.runTest(AndroidTestRunner.java:190)
at android.test.AndroidTestRunner.runTest(AndroidTestRunner.java:175)
at android.test.InstrumentationTestRunner.onStart(InstrumentationTestRunner.java:555)
at android.app.Instrumentation$InstrumentationThread.run(Instrumentation.java:1590)
TestExample.java
public class TestExample extends ActivityInstrumentationTestCase2<ClickActivity>{
public TestExample() {
super(ClickActivity.class);
// TODO Auto-generated constructor stub
}
@Override
protected void setUp() throws Exception {
// TODO Auto-generated method stub
super.setUp();
getActivity();
}
public void testCommand(){
String text = "I Love Espresso!!";
Espresso.onView(ViewMatchers.withId(R.id.txt)).perform(ViewActions.typeText(text));
Espresso.onView(ViewMatchers.withId(R.id.button1)).perform(ViewActions.click());
Espresso.onView(ViewMatchers.withId(R.id.txt)).check(ViewAssertions.matches(ViewMatchers.withText(text)));
}
}
公共类测试示例扩展ActivityInstrumentationTestCase2{
公共测试示例(){
super(ClickActivity.class);
//TODO自动生成的构造函数存根
}
@凌驾
受保护的void setUp()引发异常{
//TODO自动生成的方法存根
super.setUp();
getActivity();
}
公共void testCommand(){
String text=“我喜欢浓缩咖啡!!”;
Espresso.onView(ViewMatchers.withId(R.id.txt)).perform(ViewActions.typeText(text));
Espresso.onView(ViewMatchers.withId(R.id.button1))。执行(ViewActions.click());
Espresso.onView(ViewMatchers.withId(R.id.txt)).check(viewsertions.matches(ViewMatchers.withText(text));
}
}
Manifest.xml
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.example.espresso"
android:versionCode="1"
android:versionName="1.0" >
<uses-sdk
android:minSdkVersion="9"
android:targetSdkVersion="17" />
<instrumentation
android:targetPackage="com.example.espresso"
android:name="android.test.InstrumentationTestRunner" />
<application
android:allowBackup="true"
android:icon="@drawable/ic_launcher"
android:label="@string/app_name"
android:theme="@style/AppTheme" >
<uses-library android:name="android.test.runner" />
<activity android:name = "ClickActivity"></activity>
</application>
</manifest>
您的清单中缺少GoogleInstrumentationTestRunner条目。之后,确保将测试配置为通过GITR运行。请参阅此处的说明:您的instrumentation值->android:名称应为“com.google.android.apps.common.testing.testrunner.GoogleInstrumentationTestRunner”,而不是“android.test.InstrumentationTestRunner”
然后确保在配置junit测试时选择它:
如果您需要更多指导,我在我的博客上发布了一个快速设置图坦卡蒙。为了澄清上的说明,请参考@ValeraZakharov 使用Android Studio和gradle时,不需要更新AndroidManifest.xml,而是需要编辑文件
build.gradle
。将此条目添加到部分android
-defaultConfig
:
android {
defaultConfig {
testInstrumentationRunner "com.google.android.apps.common.testing.testrunner.GoogleInstrumentationTestRunner"
}
}
另外:右键单击“添加为库”已从Android studio中删除,并替换为:
android {
sourceSets {
// Espresso instrumentation tests
androidTest.setRoot('src/instrumentTest')
}
}
在我的项目中,android
的完整部分如下所示:
android {
compileSdkVersion 17
buildToolsVersion "19.0.1"
defaultConfig {
minSdkVersion 15
targetSdkVersion 16
versionName getCommitNumber()
testInstrumentationRunner "com.google.android.apps.common.testing.testrunner.GoogleInstrumentationTestRunner"
}
sourceSets {
// Espresso instrumentation tests
androidTest.setRoot('src/instrumentTest')
}
packagingOptions {
// Multiple LICENSE.txt in hamcrest packages.
exclude 'LICENSE.txt'
}
}
正如其他人提到的,您应该使用GoogleInstrumentationTestRunner。 如果使用ant构建,则需要向测试项目的build.xml中的“project”指令添加一个元素,如下所示 in build.xml
<?xml version="1.0" encoding="UTF-8"?>
<project name="MainActivityTest" default="help">
...
<property name="test.runner" value="com.google.android.apps.common.testing.testrunner.GoogleInstrumentationTestRunner" />
</project>
...
如果您有一个应用了单元测试的依赖库,则该库的仪器设置也应如下所示
testInstrumentationRunner "android.support.test.runner.AndroidJUnitRunner"
我正在使用IntelliJ 13,问题是自从我开始使用Gradle Android构建工具
0.9.+
以来,IntelliJ就不再“了解”Google InstrumentationTestRunner了。。。有什么想法吗?