Issue
I keep running into the following error when trying to execute my tests in Android Studio: Test running failed: Unable to find instrumentation info for: ComponentInfo{.test/android.support.test.runner.AndroidJUnitRunner}
My test class is in the androidTest/java directory and has a constructor. My build.gradle is correct too. Any help is appreciated.
Test Class
@RunWith(AndroidJUnit4.class)
@LargeTest
public class AndroidUITests extends ActivityInstrumentationTestCase2<UserActivity>{
private UserActivity userActivity;
public AndroidUITests() {
super(UserActivity.class);
}
@Before
public void setUp() throws Exception {
super.setUp();
injectInstrumentation(InstrumentationRegistry.getInstrumentation());
userActivity = getActivity();
}
@Test
public void testPhoneIconIsDisplayed() {
// When the phone_icon view is available,
// check that it is displayed.
onView(ViewMatchers.withId(R.id.groupCreate)).perform(click())
.check(matches(withText("Enter a name")));
}
}
app/build.gradle:
apply plugin: 'com.android.application'
android {
compileSdkVersion 21
buildToolsVersion "21.1.2"
defaultConfig {
testInstrumentationRunner
"android.support.test.runner.AndroidJUnitRunner"
}
packagingOptions {
exclude 'LICENSE.txt'
}
}
dependencies {
androidTestCompile 'com.android.support.test.espresso:espresso-core:2.0'
androidTestCompile 'com.android.support.test:testing-support-lib:0.1'
}
Solution
You have to update the test "Edit Configuration" and include the AndroidJUnitRunner as the instrumentation runner.
I found the solution in this video: https://youtu.be/TGU0B4qRlHY?t=9m36s
Updated
Adding what @loeschg suggest: Make sure you check the logcat logs to ensure something isn't causing issues (crash) before the test is even run. Bad code in the @BeforeClass block could resulted in the "Empty Test Suite" message in Android Studio despite having properly set the test runner.
Answered By - Juan Saravia
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