android espresso 测试 : empty test suite. 未找到测试

Question

我在 Windows 上运行 intelliJ idea 14.0.2 android 开发环境，并尝试使用 espresso UI 测试框架来测试我的应用程序。但是，当我按 run 进行 androidTest 配置时，我遇到以下问题:

Testing started at 12:09 PM ...
Waiting for device.
Target device: lge-nexus_5-05b1bd8af0ddba12
Uploading file
local path: C:\Users\AsiAnSeNsAtIoN\Documents\note\ECSE428\AssB_2\build\classes\main\AssB_2.apk
remote path: /data/local/tmp/com.cyc115.VectorCalculator
Installing com.cyc115.VectorCalculator
DEVICE SHELL COMMAND: pm install -r "/data/local/tmp/com.cyc115.VectorCalculator"
pkg: /data/local/tmp/com.cyc115.VectorCalculator
Success

Running tests
Test running startedFinish
Empty test suite.

这是截图:

我的测试类是这样的:

package com.cyc115.VectorCalculator.test;

import android.support.test.espresso.assertion.ViewAssertions;
import android.test.ActivityInstrumentationTestCase2;
import android.test.suitebuilder.annotation.LargeTest;
import android.test.suitebuilder.annotation.SmallTest;
import com.cyc115.VectorCalculator.MyActivity;

import static android.support.test.espresso.Espresso.onView;
import static android.support.test.espresso.matcher.ViewMatchers.isDisplayed;
import static android.support.test.espresso.matcher.ViewMatchers.withText;

@LargeTest
public class MyActivityTest extends ActivityInstrumentationTestCase2<MyActivity> {

    public MyActivityTest(){
        super (MyActivity.class);
    }

    @Override
    public void setUp() throws Exception {
        super.setUp();
        getActivity();
        fail();
    }
    @SmallTest
    public void testListGoesOverTheFold() {
        onView(withText("Hello world")).check(ViewAssertions.matches(isDisplayed()));
    }
}

为了以防万一，这是我的项目结构:

我的测试配置:

和我的androidManifest.xml

<?xml version="1.0" encoding="utf-8"?>
   <manifest xmlns:android="http://schemas.android.com/apk/res/android"
          package="com.cyc115.VectorCalculator"
          android:versionCode="1"
          android:versionName="1.0">
    <uses-sdk android:minSdkVersion="21"/>

    <instrumentation
    android:name="android.support.test.runner.AndroidJUnitRunner"
    android:targetPackage="com.cyc115.VectorCalculator"
    />

    <application android:label="@string/app_name" android:icon="@drawable/ic_launcher">
        <activity android:name="com.cyc115.VectorCalculator.MyActivity"
                  android:label="@string/app_name">
            <intent-filter>
                <action android:name="android.intent.action.MAIN"/>
                <category android:name="android.intent.category.LAUNCHER"/>
            </intent-filter>
        </activity>
    </application>
</manifest>

Answer 1

我找到了一个解决方法:使用基于intelliji idea社区版的android-studio，而不是intelliji idea的高级版。创建一个新项目并从那里设置 Espresso 。更多详细信息请参阅 sample project 中的 gradle 文件:

希望对您有所帮助。

http://developer.android.com/sdk/index.html