Not able to mock WebView

[crazy_guy]

Hi,

I am not able to create a mock for WebView android class using android-
mock.

public class TestWebView extends InstrumentationTestCase {

protected void setUp() throws Exception {
super.setUp();
}

protected void tearDown() throws Exception {
super.tearDown();
}

@UsesMocks({Context.class,WebView.class})
public void testConstructWebView() {
WebView mockWebView =
AndroidMock.createMock(WebView.class,this.getInstrumentation().getContext());
assertNotNull("The webView is null",mockWebView);
}
}


I am getting following error message:


java.lang.ExceptionInInitializerError
at
com.google.android.testing.mocking.AndroidMock.getSubclassFor(AndroidMock.java:
2658)
at
com.google.android.testing.mocking.AndroidMock.createMock(AndroidMock.java:
188)
at
com.google.android.testing.mocking.AndroidMock.createMock(AndroidMock.java:
157)
at
com.yahoo.yadsdk.ads.test.TestYImageBannerAd.testConstructWebView(TestYImageBannerAd.java:
53)
at java.lang.reflect.Method.invokeNative(Native Method)
at
android.test.InstrumentationTestCase.runMethod(InstrumentationTestCase.java:
204)
at
android.test.InstrumentationTestCase.runTest(InstrumentationTestCase.java:
194)
at android.test.AndroidTestRunner.runTest(AndroidTestRunner.java:169)
at android.test.AndroidTestRunner.runTest(AndroidTestRunner.java:154)
at
android.test.InstrumentationTestRunner.onStart(InstrumentationTestRunner.java:
520)
at android.app.Instrumentation
$InstrumentationThread.run(Instrumentation.java:1447)
Caused by: java.lang.reflect.InvocationTargetException
at
v22.genmocks.android.webkit.WebViewDelegateSubclass.<init>(WebViewDelegateSubclass.java)
at java.lang.reflect.Constructor.constructNative(Native Method)
at java.lang.reflect.Constructor.newInstance(Constructor.java:446)
at
com.google.android.testing.mocking.AndroidMock.getSubclassFor(AndroidMock.java:
2650)
... 16 more
Caused by: java.lang.NullPointerException
at android.webkit.ViewManager.<init>(ViewManager.java:104)
at android.webkit.WebView.<init>(WebView.java:941)
at android.webkit.WebView.<init>(WebView.java:920)
at android.webkit.WebView.<init>(WebView.java:910)
at android.webkit.WebView.<init>(WebView.java:901)
... 20 more

But I am able to create an ImageView instance using same code. Is
there anything very very specific to WebView, which is causing this to
happen?

Any help in this regard would be appreciated.

Thanks a lot!
Vaibhav

[Fred Grott]

IS there a reason you are using InstrumentationTestCase? There are two
types of TestCase classes, the one you are using does not have the
class enter the normal android app lifecyle(used for basic unit tests
only) and the InstrumentationTestCase2 tests the stuff with the full
android app lifecycle.

--
Fred Grott
Android Developer
Blog: http://fredgrott.wordpress.com

[vaibhav agrawal]

Hi Fret,

Thanks for the reply.

I did tried earlier with inheriting "TestCase" class like this:

public class TestYCustomBannerAd extends TestCase {

    protected void setUp() throws Exception {
        super.setUp();
    }

    protected void tearDown() throws Exception {
        super.tearDown();
    }

    @UsesMocks({Context.class,WebView.class})
    public void testConstructWebView() {

        Context mockContext = AndroidMock.createMock(Context.class);
        WebView mockWebView = AndroidMock.createMock(WebView.class,mockContext);
        assertNotNull("The webView instance is null!!!",mockWebView);
   }
}

Here I am hitting following error message:

java.lang.ExceptionInInitializerError
at com.google.android.testing.mocking.AndroidMock.getSubclassFor(AndroidMock.java:2658)
at com.google.android.testing.mocking.AndroidMock.createMock(AndroidMock.java:188)
at com.google.android.testing.mocking.AndroidMock.createMock(AndroidMock.java:157)

at com.yahoo.yadsdk.ads.test.TestYCustomBannerAd.testConstructWebView(TestYCustomBannerAd.java:30)
at java.lang.reflect.Method.invokeNative(Native Method)

at android.test.AndroidTestRunner.runTest(AndroidTestRunner.java:169)
at android.test.AndroidTestRunner.runTest(AndroidTestRunner.java:154)
at android.test.InstrumentationTestRunner.onStart(InstrumentationTestRunner.java:520)

at android.app.Instrumentation$InstrumentationThread.run(Instrumentation.java:1447)

Caused by: java.lang.reflect.InvocationTargetException
at v22.genmocks.android.webkit.WebViewDelegateSubclass.<init>(WebViewDelegateSubclass.java)
at java.lang.reflect.Constructor.constructNative(Native Method)
at java.lang.reflect.Constructor.newInstance(Constructor.java:446)
at com.google.android.testing.mocking.AndroidMock.getSubclassFor(AndroidMock.java:2650)

... 15 more
Caused by: java.lang.IllegalStateException: missing behavior definition for the preceeding method call getResources()
at org.easymock.internal.MockInvocationHandler.invoke(MockInvocationHandler.java:30)
at org.easymock.internal.ObjectMethodsFilter.invoke(ObjectMethodsFilter.java:61)
at $Proxy1.getResources(Native Method)
at v22.genmocks.android.content.ContextDelegateSubclass.getResources(ContextDelegateSubclass.java)
at android.view.ViewConfiguration.get(ViewConfiguration.java:211)
at android.view.View.<init>(View.java:1814)
at android.view.View.<init>(View.java:1856)
at android.view.ViewGroup.<init>(ViewGroup.java:291)
at android.widget.AbsoluteLayout.<init>(AbsoluteLayout.java:52)
at android.webkit.WebView.<init>(WebView.java:937)

at android.webkit.WebView.<init>(WebView.java:920)
at android.webkit.WebView.<init>(WebView.java:910)
at android.webkit.WebView.<init>(WebView.java:901)

... 19 more


Looks like while creating the mock Webview, it is trying to execute some APIs on mockContext, which I am not aware. Also, should we go ahead and train mockContext which returns some object for "getResources()" API , doesn't make any sense to me and looks awkward.

Are you able to mock "WebView" successfully in some way?

Thanks,
Vaibhav

[Fred Grott]

Lets start again, you are mocking a webivew by extending Testcase
classes that do not fully setup the test in the app lifecyle..Webview
is a class that need the app-lifecyle to be tested.. so why do you
think that will work?

You only can use non-app lifecycle TestCase classes on those classes
under test that do not touch the app lifecyle.

[vaibhav agrawal]

Hi Fred,

Thanks again for the reply.

The whole thing I am doing is to do unit testing by mocking certain components and testing one of them. One of the component's method(to be tested) requires a webview instance as an argument, which I am trying to mock here.

However, there is another method which requires an ImageView, which I am able to create using the method I posted initially. I hope it clarifies the use-case.

So, I am assuming here that there is NO WAY I can mock WebView or instantiate a WebView while using android-mock, because it requires the app-lifecycle to be setup properly.

[vaibhav agrawal]

Hello,

If mocking WebView is not supported by android-mock, then I am wondering why following delegate classes have been added in android_framework_mocks.jar . Is there any way out to use them?

$ jar tvf libs/android_framework_mocks.jar | grep WebView

   456 Tue Jan 24 21:20:26 GMT+05:30 2012 v15/genmocks/android/webkit/WebView$WebViewTransportDelegateInterface.class
  1255 Tue Jan 24 21:20:26 GMT+05:30 2012 v15/genmocks/android/webkit/WebView$WebViewTransportDelegateSubclass.class
  1274 Tue Jan 24 21:20:26 GMT+05:30 2012 v15/genmocks/android/webkit/WebViewClientDelegateInterface.class
  2733 Tue Jan 24 21:20:26 GMT+05:30 2012 v15/genmocks/android/webkit/WebViewClientDelegateSubclass.class
 15017 Tue Jan 24 21:20:26 GMT+05:30 2012 v15/genmocks/android/webkit/WebViewDelegateInterface.class
 41626 Tue Jan 24 21:20:26 GMT+05:30 2012 v15/genmocks/android/webkit/WebViewDelegateSubclass.class
   456 Tue Jan 24 21:21:04 GMT+05:30 2012 v16/genmocks/android/webkit/WebView$WebViewTransportDelegateInterface.class
  1255 Tue Jan 24 21:21:04 GMT+05:30 2012 v16/genmocks/android/webkit/WebView$WebViewTransportDelegateSubclass.class
  1274 Tue Jan 24 21:21:04 GMT+05:30 2012 v16/genmocks/android/webkit/WebViewClientDelegateInterface.class
  2733 Tue Jan 24 21:21:04 GMT+05:30 2012 v16/genmocks/android/webkit/WebViewClientDelegateSubclass.class
 15515 Tue Jan 24 21:21:06 GMT+05:30 2012 v16/genmocks/android/webkit/WebViewDelegateInterface.class
 42810 Tue Jan 24 21:21:06 GMT+05:30 2012 v16/genmocks/android/webkit/WebViewDelegateSubclass.class
   457 Tue Jan 24 21:21:42 GMT+05:30 2012 v201/genmocks/android/webkit/WebView$WebViewTransportDelegateInterface.class
  1259 Tue Jan 24 21:21:42 GMT+05:30 2012 v201/genmocks/android/webkit/WebView$WebViewTransportDelegateSubclass.class
  1275 Tue Jan 24 21:21:42 GMT+05:30 2012 v201/genmocks/android/webkit/WebViewClientDelegateInterface.class
  2737 Tue Jan 24 21:21:42 GMT+05:30 2012 v201/genmocks/android/webkit/WebViewClientDelegateSubclass.class
 15783 Tue Jan 24 21:21:42 GMT+05:30 2012 v201/genmocks/android/webkit/WebViewDelegateInterface.class
 43631 Tue Jan 24 21:21:42 GMT+05:30 2012 v201/genmocks/android/webkit/WebViewDelegateSubclass.class
   456 Tue Jan 24 21:22:46 GMT+05:30 2012 v21/genmocks/android/webkit/WebView$WebViewTransportDelegateInterface.class
  1255 Tue Jan 24 21:22:46 GMT+05:30 2012 v21/genmocks/android/webkit/WebView$WebViewTransportDelegateSubclass.class
  1274 Tue Jan 24 21:22:46 GMT+05:30 2012 v21/genmocks/android/webkit/WebViewClientDelegateInterface.class
  2733 Tue Jan 24 21:22:46 GMT+05:30 2012 v21/genmocks/android/webkit/WebViewClientDelegateSubclass.class
 15903 Tue Jan 24 21:22:46 GMT+05:30 2012 v21/genmocks/android/webkit/WebViewDelegateInterface.class
 44019 Tue Jan 24 21:22:46 GMT+05:30 2012 v21/genmocks/android/webkit/WebViewDelegateSubclass.class
   456 Tue Jan 24 21:23:24 GMT+05:30 2012 v22/genmocks/android/webkit/WebView$WebViewTransportDelegateInterface.class
  1255 Tue Jan 24 21:23:24 GMT+05:30 2012 v22/genmocks/android/webkit/WebView$WebViewTransportDelegateSubclass.class
  1392 Tue Jan 24 21:23:24 GMT+05:30 2012 v22/genmocks/android/webkit/WebViewClientDelegateInterface.class
  2921 Tue Jan 24 21:23:24 GMT+05:30 2012 v22/genmocks/android/webkit/WebViewClientDelegateSubclass.class
 16210 Tue Jan 24 21:23:24 GMT+05:30 2012 v22/genmocks/android/webkit/WebViewDelegateInterface.class
 44872 Tue Jan 24 21:23:24 GMT+05:30 2012 v22/genmocks/android/webkit/WebViewDelegateSubclass.class
   457 Tue Jan 24 21:23:58 GMT+05:30 2012 v231/genmocks/android/webkit/WebView$WebViewTransportDelegateInterface.class
  1259 Tue Jan 24 21:23:58 GMT+05:30 2012 v231/genmocks/android/webkit/WebView$WebViewTransportDelegateSubclass.class
  1393 Tue Jan 24 21:23:58 GMT+05:30 2012 v231/genmocks/android/webkit/WebViewClientDelegateInterface.class
  2925 Tue Jan 24 21:23:58 GMT+05:30 2012 v231/genmocks/android/webkit/WebViewClientDelegateSubclass.class
 16458 Tue Jan 24 21:23:58 GMT+05:30 2012 v231/genmocks/android/webkit/WebViewDelegateInterface.class
 45619 Tue Jan 24 21:23:58 GMT+05:30 2012 v231/genmocks/android/webkit/WebViewDelegateSubclass.class
   457 Tue Jan 24 21:25:00 GMT+05:30 2012 v233/genmocks/android/webkit/WebView$WebViewTransportDelegateInterface.class
  1259 Tue Jan 24 21:25:00 GMT+05:30 2012 v233/genmocks/android/webkit/WebView$WebViewTransportDelegateSubclass.class
  1393 Tue Jan 24 21:25:00 GMT+05:30 2012 v233/genmocks/android/webkit/WebViewClientDelegateInterface.class
  2925 Tue Jan 24 21:25:00 GMT+05:30 2012 v233/genmocks/android/webkit/WebViewClientDelegateSubclass.class
 16458 Tue Jan 24 21:25:00 GMT+05:30 2012 v233/genmocks/android/webkit/WebViewDelegateInterface.class
 45619 Tue Jan 24 21:25:00 GMT+05:30 2012 v233/genmocks/android/webkit/WebViewDelegateSubclass.class
   456 Tue Jan 24 21:26:30 GMT+05:30 2012 v30/genmocks/android/webkit/WebView$WebViewTransportDelegateInterface.class
  1255 Tue Jan 24 21:26:30 GMT+05:30 2012 v30/genmocks/android/webkit/WebView$WebViewTransportDelegateSubclass.class
  1508 Tue Jan 24 21:26:30 GMT+05:30 2012 v30/genmocks/android/webkit/WebViewClientDelegateInterface.class
  3107 Tue Jan 24 21:26:30 GMT+05:30 2012 v30/genmocks/android/webkit/WebViewClientDelegateSubclass.class
 18759 Tue Jan 24 21:26:30 GMT+05:30 2012 v30/genmocks/android/webkit/WebViewDelegateInterface.class
 52530 Tue Jan 24 21:26:30 GMT+05:30 2012 v30/genmocks/android/webkit/WebViewDelegateSubclass.class
  2079 Tue Jan 24 21:26:30 GMT+05:30 2012 v30/genmocks/android/webkit/WebViewFragmentDelegateInterface.class
  5232 Tue Jan 24 21:26:30 GMT+05:30 2012 v30/genmocks/android/webkit/WebViewFragmentDelegateSubclass.class
   456 Tue Jan 24 21:27:38 GMT+05:30 2012 v31/genmocks/android/webkit/WebView$WebViewTransportDelegateInterface.class
  1255 Tue Jan 24 21:27:38 GMT+05:30 2012 v31/genmocks/android/webkit/WebView$WebViewTransportDelegateSubclass.class
  1625 Tue Jan 24 21:27:38 GMT+05:30 2012 v31/genmocks/android/webkit/WebViewClientDelegateInterface.class
  3296 Tue Jan 24 21:27:38 GMT+05:30 2012 v31/genmocks/android/webkit/WebViewClientDelegateSubclass.class
 19133 Tue Jan 24 21:27:38 GMT+05:30 2012 v31/genmocks/android/webkit/WebViewDelegateInterface.class
 53381 Tue Jan 24 21:27:38 GMT+05:30 2012 v31/genmocks/android/webkit/WebViewDelegateSubclass.class
  2161 Tue Jan 24 21:27:38 GMT+05:30 2012 v31/genmocks/android/webkit/WebViewFragmentDelegateInterface.class
  5384 Tue Jan 24 21:27:38 GMT+05:30 2012 v31/genmocks/android/webkit/WebViewFragmentDelegateSubclass.class
   456 Tue Jan 24 21:29:36 GMT+05:30 2012 v40/genmocks/android/webkit/WebView$WebViewTransportDelegateInterface.class
  1255 Tue Jan 24 21:29:36 GMT+05:30 2012 v40/genmocks/android/webkit/WebView$WebViewTransportDelegateSubclass.class
  1625 Tue Jan 24 21:29:36 GMT+05:30 2012 v40/genmocks/android/webkit/WebViewClientDelegateInterface.class
  3296 Tue Jan 24 21:29:36 GMT+05:30 2012 v40/genmocks/android/webkit/WebViewClientDelegateSubclass.class
 20296 Tue Jan 24 21:29:36 GMT+05:30 2012 v40/genmocks/android/webkit/WebViewDelegateInterface.class
 56323 Tue Jan 24 21:29:36 GMT+05:30 2012 v40/genmocks/android/webkit/WebViewDelegateSubclass.class
  2357 Tue Jan 24 21:29:36 GMT+05:30 2012 v40/genmocks/android/webkit/WebViewFragmentDelegateInterface.class
  5853 Tue Jan 24 21:29:36 GMT+05:30 2012 v40/genmocks/android/webkit/WebViewFragmentDelegateSubclass.class
   457 Tue Jan 24 21:30:54 GMT+05:30 2012 v403/genmocks/android/webkit/WebView$WebViewTransportDelegateInterface.class
  1259 Tue Jan 24 21:30:54 GMT+05:30 2012 v403/genmocks/android/webkit/WebView$WebViewTransportDelegateSubclass.class
  1626 Tue Jan 24 21:30:54 GMT+05:30 2012 v403/genmocks/android/webkit/WebViewClientDelegateInterface.class
  3300 Tue Jan 24 21:30:54 GMT+05:30 2012 v403/genmocks/android/webkit/WebViewClientDelegateSubclass.class
 20349 Tue Jan 24 21:30:52 GMT+05:30 2012 v403/genmocks/android/webkit/WebViewDelegateInterface.class
 56515 Tue Jan 24 21:30:52 GMT+05:30 2012 v403/genmocks/android/webkit/WebViewDelegateSubclass.class
  2422 Tue Jan 24 21:30:54 GMT+05:30 2012 v403/genmocks/android/webkit/WebViewFragmentDelegateInterface.class
  6057 Tue Jan 24 21:30:52 GMT+05:30 2012 v403/genmocks/android/webkit/WebViewFragmentDelegateSubclass.class

Regards,
Vaibhav