如何测试自定义 cordova 插件的原生代码?



我知道cordova插件测试框架将有助于测试任何cordova项目。我正在为Android平台开发一个自定义的摄像头cordova插件。我想为我的自定义相机安卓插件代码写一些Junit/Instrumentation测试用例。我面临的问题是,我无法从我的测试类创建CordovaInterfaceCordovaWebView对象。

我是否可以从我的测试类中创建CordovaInterfaceCordovaWebView对象,并将它们作为我的自定义相机Android插件excute方法的参数传递。

我想避免使用cordova插件测试框架的js级别的单元测试用例,并编写一些Junit测试用例(因为我可以访问我的相机cordova插入使用的大多数内部类)。如果这种做法不对,请纠正我。

首先,将CordovaLib作为库复制到您的插件项目中。在你的测试类中添加这样的内容:

首先,一个活动,不要忘记将其添加到AndroidMainfest.xml中进行测试。

public class TestActivity extends CordovaActivity {
    CordovaWebView getWebView(){
        return this.appView;
    }
    CordovaInterface getInterface(){
        return this.cordovaInterface;
    }
    public void init(){
        super.init();
    }
}

在你的测试课上:

@Rule
public ActivityTestRule<CordovaActivity> mActivityRule =
    new ActivityTestRule<CordovaActivity>(CordovaActivity.class);

private CordovaWebView wv;
private CordovaInterface cordovaInterface;
private YourCordovaPlugin km;
private TestActivity activity;
@Before
public void Init() throws InterruptedException {
    km = new KM1930CordovaPlugin();
    activity = mActivityRule.getActivity();
    Runnable action = new Runnable() {
        @Override
        public void run() {
            activity.init();
            wv =  mActivityRule.getActivity().getWebView();
            cordovaInterface = mActivityRule.getActivity().getInterface();
            km = new YourCordovaPlugin();
            km.initialize(cordovaInterface,wv);
            wv.getPluginManager().addService(new  PluginEntry("YourServiceName",km));
            synchronized (this) {
                this.notify();
            }
        }
    };
    synchronized( action ) {
        activity.runOnUiThread(action);
        action.wait() ;
    }
}

然后您可以通过调用execute方法来添加您的测试方法和调用方法。

@Test
public void TestBluetooth() throws JSONException {
        this.km.execute("echo","[]",new CallbackContext("0",wv));
}

在我的情况下,我不得不修改一下这种方法:

首先,我的TestActivity必须与使用<action android:name="android.intent.action.MAIN" /> intent-filter的活动处于同一级别。

然后,在src/androidTest/java.com/your/package/name中创建测试文件(在我的例子中是MyTestActivityTest.java

然后,在测试本身:

import android.support.test.rule.ActivityTestRule;
import android.support.test.rule.UiThreadTestRule;
import android.support.test.runner.AndroidJUnit4;
import org.junit.Before;
import org.junit.Rule;
import org.junit.runner.RunWith;
import java.util.concurrent.CountDownLatch;
@RunWith(AndroidJUnit4.class)
public class MyTestActivityTest {
    @Rule
    public ActivityTestRule<TestActivity> mActivityRule = new ActivityTestRule<>(TestActivity.class);
    @Rule
    public UiThreadTestRule uiThreadTestRule = new UiThreadTestRule();
    private YourPlugin mockYourPlugin;
    private CordovaWebView cordovaWebView;
    private CordovaInterface cordovaInterface;
    private TestActivity activity;
    @Before
    public void setUp() throws Throwable {
        activity = mActivityRule.getActivity();
        assertNotNull(activity);
        final CountDownLatch signal = new CountDownLatch(1); --> this one is the important! the sync part got stucked!
        Runnable action = () -> {
            activity.init();
            cordovaWebView = mActivityRule.getActivity().getWebView();
            cordovaInterface = mActivityRule.getActivity().getInterface();
            mockYourPlugin = new YourPlugin();
            mockYourPlugin.initialize(cordovaInterface, cordovaWebView);
            cordovaWebView.getPluginManager().addService(new PluginEntry("YourServiceName", mockBankId));
            signal.countDown();// notify the count down latch, i.e release it
        };
        uiThreadTestRule.runOnUiThread(action);
        signal.await();// wait for callback
    }
    @Test
    public void TestBluetooth() throws JSONException {
        this.mockYourPlugin.execute("echo","[]",new CallbackContext("0", cordovaWebView));
    }

}

和我的build.gradle文件,我有这个依赖项:

// JUnit 4 framework
implementation 'junit:junit:4.12'
// required if you want to use Mockito for unit tests
implementation 'org.mockito:mockito-core:2.13.0'
implementation 'org.mockito:mockito-android:2.8.47'
implementation 'com.android.support.test:rules:1.0.2'

别忘了把它也放在build.gradle文件中:

defaultConfig {
    ...
    testInstrumentationRunner "android.support.test.runner.AndroidJUnitRunner"
    ...
}

我真的希望这能帮助

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