Espresso intent test failing

Question

I'm learning android instrumentation testing with espresso. I have an app which has a drawer menu and there is a menu called About. I was testing click on that menu item and contents of activity.

testfunction:

  @Test public void testNavigationDrawerAboutMenu() {     onView(withId(R.id.drawer_layout))             .perform(DrawerActions.open()); //open drawer     onView(withText("About")).perform(click());     onView(withId(R.id.aboutsptemail)).check(matches(withText(R.string.screen_about_support_email)));     onView(withId(R.id.aboutcpright)).check(matches(isDisplayed()));     onView(withId(R.id.aboutprivacy)).check(matches(isDisplayed()));     onView(withId(R.id.abouttermsconditions)).check(matches(isDisplayed()));     onView(withId(R.id.aboutsptemail)).perform(click()); } 

now the last textview has weblink embedded in it. so when you click on it, it opens the link(www.support.com) in a web view within the app. I want to test this functionality. so I tried this:

intended(hasComponent(WebViewActivity.class.getName())); //check if webview called on supportEmail link click 

but test fails with this error trace:

java.lang.NullPointerException: Attempt to invoke virtual method 'android.support.test.espresso.intent.OngoingStubbing android.support.test.espresso.intent.Intents.internalIntending(org.hamcrest.Matcher)' on a null object reference at android.support.test.espresso.intent.Intents.intending(Intents.java:155) at com.ScanBuy.SmartLabel.NavigationDrawerActivityTests.testNavigationDrawerAboutMenu(NavigationDrawerActivityTests.java:94) at java.lang.reflect.Method.invoke(Native Method) at org.junit.runners.model.FrameworkMethod$1.runReflectiveCall(FrameworkMethod.java:50) at org.junit.internal.runners.model.ReflectiveCallable.run(ReflectiveCallable.java:12) at org.junit.runners.model.FrameworkMethod.invokeExplosively(FrameworkMethod.java:47) at org.junit.internal.runners.statements.InvokeMethod.evaluate(InvokeMethod.java:17) at android.support.test.internal.statement.UiThreadStatement.evaluate(UiThreadStatement.java:55) at android.support.test.rule.ActivityTestRule$ActivityStatement.evaluate(ActivityTestRule.java:270) at org.junit.rules.RunRules.evaluate(RunRules.java:20) at org.junit.runners.ParentRunner.runLeaf(ParentRunner.java:325) at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:78) at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:57) at org.junit.runners.ParentRunner$3.run(ParentRunner.java:290) at org.junit.runners.ParentRunner.access$000(ParentRunner.java:58) at org.junit.runners.ParentRunner$2.evaluate(ParentRunner.java:268) at org.junit.runners.ParentRunner.run(ParentRunner.java:363) at org.junit.runners.Suite.runChild(Suite.java:128) at org.junit.runners.Suite.runChild(Suite.java:27) at org.junit.runners.ParentRunner$3.run(ParentRunner.java:290) at org.junit.runners.ParentRunner$1.schedule(ParentRunner.java:71) at org.junit.runners.ParentRunner.runChildren(ParentRunner.java:288) at org.junit.runners.ParentRunner.access$000(ParentRunner.java:58) at org.junit.runners.ParentRunner$2.evaluate(ParentRunner.java:268) at org.junit.runners.ParentRunner.run(ParentRunner.java:363) at org.junit.runner.JUnitCore.run(JUnitCore.java:137) at org.junit.runner.JUnitCore.run(JUnitCore.java:115) at android.support.test.internal.runner.TestExecutor.execute(TestExecutor.java:59) at android.support.test.runner.AndroidJUnitRunner.onStart(AndroidJUnitRunner.java:262) at android.app.Instrumentation$InstrumentationThread.run(Instrumentation.java:1879) 

I have also tried resolve by idling the resources before checking for intent. But didn't work. Can anybody help?

Answer 1

I had the same problem and solved it by using IntentsTestRule instead of ActivityTestRule. IntentsTestRule is a subclass of ActivityTestRule. Set up your @Rule which creates the activity like so:

@Rule public IntentsTestRule<MyActivity> mActivity = new IntentsTestRule<MyActivity>(MyActivity.class) {     @Override     protected Intent getActivityIntent() {         ...     } }; 

See the following project for more information: https://github.com/googlesamples/android-testing/tree/master/ui/espresso/IntentsBasicSample

Answer 2

If you are using a custom ActivityTestRule, you can add the proper Intents.init(), Intents.release() calls:

@Override protected void afterActivityLaunched() {     Intents.init();     super.afterActivityLaunched(); }  @Override protected void afterActivityFinished() {     super.afterActivityFinished();     Intents.release(); }