CODEWITHSUNDEEP
androidui-automationandroid-espresso
Shashi Kumar Raja
Shashi Kumar Raja

Reputation: 518

Test case failing after clearing app data in @Before

I am trying to automate the onboarding process of the app and need to clear app data before each @Test

I have implemented

public class Onboarding {
@Rule
public ActivityTestRule<AppStartActivity> mActivityTestRule = new ActivityTestRule<>(AppStartActivity.class);
@Before
public void clearPreferences() {
    try {
        // clearing app data
        Runtime runtime = Runtime.getRuntime();
        runtime.exec("pm clear packageName");

    } catch (Exception e) {
        e.printStackTrace();
    }
}
@Test
public void Mobile10DigitWithInvalidOtp () {
    try {
        Thread.sleep(5000);
    } catch (InterruptedException e) {
        e.printStackTrace();
    }

    OnboardingFragment onboardingFragment = new OnboardingFragment();
    onboardingFragment.LoginAsExistingUserIndia("1325546852", "12345");
    onboardingFragment.invalidOtpMessage.check(matches(isDisplayed()));
}
}

But once this runs the test crashes.

Test failed to run to completion. Reason: 'Instrumentation run failed due to 'Process crashed.''. Check device logcat for details Test running failed: Instrumentation run failed due to 'Process crashed.'

Also if I run the @Test without @Before it runs fine.

How should I implement this so that I can continue running my test cases after clearing app data before each test run?

Upvotes: 4

Views: 1600

Answers (2)

shubhamgarg1
shubhamgarg1

Reputation: 1995

You can use Android Test Orchestrator.

https://developer.android.com/training/testing/junit-runner#using-android-test-orchestrator

To enable Android Test Orchestrator using the Gradle command-line tool, add the following statements to your project's build.gradle file:

android {
  defaultConfig {
   ...
   testInstrumentationRunner "androidx.test.runner.AndroidJUnitRunner"

   // The following argument makes the Android Test Orchestrator run its
   // "pm clear" command after each test invocation. This command ensures
   // that the app's state is completely cleared between tests.
   testInstrumentationRunnerArguments clearPackageData: 'true'
 }

  testOptions {
    execution 'ANDROIDX_TEST_ORCHESTRATOR'
  }
}

dependencies {
  androidTestImplementation 'androidx.test:runner:1.1.0'
  androidTestUtil 'androidx.test:orchestrator:1.1.0'
}

Upvotes: 0

denys
denys

Reputation: 6910

When you run instrumentation tests - they are running together with the application under tests in the same thread. Clearing the package or in other words killing the application under test thread will kill instrumentation tests as well.

Possible solutions:

  • clear the package before starting the instrumentation tests with for example adb command: adb shell pm clear com.bla.bla
  • implement method in the application under test which cleans needed data (databases, prefs, etc.) and call it from inside @Before test method.

Upvotes: 1

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