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package you.xiaochen;

import android.content.Context;
import android.support.test.InstrumentationRegistry;
import android.support.test.runner.AndroidJUnit4;

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

import static org.junit.Assert.*;

/**
 * Instrumentation test which will execute on an Android device.
 *
 * @see Testing documentation
 */
@RunWith（AndroidJUnit4.class）
public class ExampleInstrumentedTest {
    @Test
    public void useAppContext（） throws Exception {
        // Context of the app under test.
        Context appContext = InstrumentationRegistry.getTargetContext（）;

        assertEquals（“you.xiaochen“ appContext.getPackageName（））;
    }
}

 属性            大小     日期    时间   名称
----------- ---------  ---------- -----  ----
     目录           0  2017-03-28 20:05  CameraDemo
     文件         127  2017-03-28 19:21  CameraDemo.gitignore
     目录           0  2017-03-28 19:21  CameraDemo.gradle
     目录           0  2017-03-28 20:00  CameraDemo.gradle2.14.1
     目录           0  2017-03-28 19:21  CameraDemo.gradle2.14.1 askArtifacts
     文件          31  2017-03-28 19:21  CameraDemo.gradle2.14.1 askArtifactscache.properties
     文件          17  2017-03-29 09:16  CameraDemo.gradle2.14.1 askArtifactscache.properties.lock
     文件      160298  2017-03-29 09:16  CameraDemo.gradle2.14.1 askArtifactsfileHashes.bin
     文件     4362209  2017-03-29 09:16  CameraDemo.gradle2.14.1 askArtifactsfileSnapshots.bin
     文件       29900  2017-03-29 09:16  CameraDemo.gradle2.14.1 askArtifactsfileSnapshotsToTreeSnapshotsIndex.bin
     文件      136258  2017-03-29 09:16  CameraDemo.gradle2.14.1 askArtifacts askArtifacts.bin
     目录           0  2017-03-28 20:00  CameraDemo.gradle2.14.1 asks
     目录           0  2017-03-28 20:00  CameraDemo.gradle2.14.1 asks\_app_compileDebugJavaWithJavac
     目录           0  2017-03-28 20:00  CameraDemo.gradle2.14.1 asks\_app_compileDebugJavaWithJavaclocalClassSetAnalysis
     文件       31418  2017-03-29 09:16  CameraDemo.gradle2.14.1 asks\_app_compileDebugJavaWithJavaclocalClassSetAnalysislocalClassSetAnalysis.bin
     文件          17  2017-03-29 09:16  CameraDemo.gradle2.14.1 asks\_app_compileDebugJavaWithJavaclocalClassSetAnalysislocalClassSetAnalysis.lock
     目录           0  2017-03-28 20:00  CameraDemo.gradle2.14.1 asks\_app_compileDebugJavaWithJavaclocalJarClasspathSnapshot
     文件       20232  2017-03-29 09:16  CameraDemo.gradle2.14.1 asks\_app_compileDebugJavaWithJavaclocalJarClasspathSnapshotlocalJarClasspathSnapshot.bin
     文件          17  2017-03-29 09:16  CameraDemo.gradle2.14.1 asks\_app_compileDebugJavaWithJavaclocalJarClasspathSnapshotlocalJarClasspathSnapshot.lock
     目录           0  2017-03-29 09:16  CameraDemo.idea
     文件         686  2017-03-28 19:21  CameraDemo.ideacompiler.xml
     目录           0  2017-03-28 19:21  CameraDemo.ideacopyright
     文件          76  2017-03-28 19:21  CameraDemo.ideacopyrightprofiles_settings.xml
     文件         722  2017-03-28 19:21  CameraDemo.ideagradle.xml
     目录           0  2017-03-29 08:44  CameraDemo.idealibraries
     文件         645  2017-03-28 19:23  CameraDemo.idealibrariesanimated_vector_drawable_25_3_0.xml
     文件         585  2017-03-29 08:44  CameraDemo.idealibrariesappcompat_v7_25_3_0.xml
     文件         627  2017-03-28 19:23  CameraDemo.idealibrariesespresso_core_2_2_2.xml
     文件         682  2017-03-28 19:23  CameraDemo.idealibrariesespresso_idling_resource_2_2_2.xml
     文件         700  2017-03-28 19:23  CameraDemo.idealibrariesexposed_instrumentation_api_publish_0_5.xml
     文件         526  2017-03-28 19:23  CameraDemo.idealibrarieshamcrest_core_1_3.xml
............此处省略105个文件信息