How to grant permissions to android instrumented tests?

Question

I have an application that reads SMSs. The app works fine when debugging but when testing it using android instrumented test it throws the following error

java.lang.SecurityException: Permission Denial: reading com.android.providers.telephony.SmsProvider 

This is my test case

@RunWith(AndroidJUnit4.class) public class SmsFetcherTest {     @Test    public void fetchTenSms() throws Exception {       // Context of the app under test.       Context appContext = InstrumentationRegistry.getContext();        //   Fails anyway.       //   assertTrue(ContextCompat.checkSelfPermission(appContext,       //     "android.permission.READ_SMS") == PackageManager.PERMISSION_GRANTED);        List<Sms> tenSms = new SmsFetcher(appContext)               .limit(10)               .get();        assertEquals(10, tenSms.size());    } } 

I'm new to instrumented tests. Is this is proper way to do this?

Or am I missing something?

Answer 1

Use GrantPermissionRule. Here's how:

Add the following dependency to app/build.gradle:

dependencies {     ...     androidTestImplementation 'androidx.test:rules:1.2.0' } 

Now add the following to your InstrumentedTest class:

import androidx.test.rule.GrantPermissionRule;  public class InstrumentedTest {     @Rule     public GrantPermissionRule mRuntimePermissionRule = GrantPermissionRule.grant(Manifest.permission.READ_SMS);     ... } 

Answer 2

You can grant the permission as follows:

@RunWith(AndroidJUnit4.class) public class MyInstrumentationTest {     @Rule     public GrantPermissionRule permissionRule = GrantPermissionRule.grant(Manifest.permission.READ_SMS);     ...  }