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Android Testing in Android Unit Testing - Now Featuring Robolectric! Testing with Robolectric

Posted by Christopher Stewart
Christopher Stewart
7,531 Points

android.content.res.Resources$NotFoundException: String resource ID #0x7f0c0013

It works just fine when empty:

package com.teamtreehouse.testingbase;

import android.os.Build;
import android.view.inputmethod.EditorInfo;
import org.junit.Before;
import org.junit.Test;
import org.junit.runner.RunWith;
import org.robolectric.Robolectric;
import org.robolectric.RobolectricGradleTestRunner;
import org.robolectric.annotation.Config;

import static org.junit.Assert.*;

@RunWith(RobolectricGradleTestRunner.class)
@Config(constants = BuildConfig.class, sdk = Build.VERSION_CODES.LOLLIPOP)
public class MainActivityTest {

    MainActivity mMainActivity;

    @Before
    public void setUp() throws Exception {
        //mMainActivity = Robolectric.setupActivity(MainActivity.class);
    }

    @Test
    public void editTextUpdatesTextView() throws Exception {
       /* // Arrange
        String givenString = "test123";
        mMainActivity.editText.setText(givenString);

        // Act
        mMainActivity.editText.onEditorAction(EditorInfo.IME_ACTION_DONE);

        // Assert
        String actualString = mMainActivity.textView.getText().toString();
        assertEquals(givenString, actualString);*/
    }
}

Using RoboElectric 3.1

dependencies {
    compile fileTree(dir: 'libs', include: ['*.jar'])
    testCompile 'junit:junit:4.12'
    compile 'com.android.support:appcompat-v7:23.4.0'
    testCompile "org.mockito:mockito-core:1.+"
    testCompile 'org.robolectric:robolectric:3.1'
}

However, when I un-comment the setUp method I get this error

    at android.content.res.Resources.getText(Resources.java:274)
    at android.content.res.Resources.getString(Resources.java:360)
    at android.content.Context.getString(Context.java:376)
    at org.robolectric.util.ActivityController.getActivityTitle(ActivityController.java:120)
    at org.robolectric.util.ActivityController.attach(ActivityController.java:61)
    at org.robolectric.util.ActivityController.of(ActivityController.java:32)
    at org.robolectric.Robolectric.buildActivity(Robolectric.java:82)
    at org.robolectric.Robolectric.buildActivity(Robolectric.java:78)
    at org.robolectric.Robolectric.setupActivity(Robolectric.java:86)
    at com.teamtreehouse.testingbase.MainActivityTest.setUp(MainActivityTest.java:25)
    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.RunBefores.evaluate(RunBefores.java:24)
    at org.robolectric.RobolectricTestRunner$2.evaluate(RobolectricTestRunner.java:265)
    at org.robolectric.RobolectricTestRunner.runChild(RobolectricTestRunner.java:191)
    at org.robolectric.RobolectricTestRunner.runChild(RobolectricTestRunner.java:56)
    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.robolectric.RobolectricTestRunner$1.evaluate(RobolectricTestRunner.java:157)
    at org.junit.runners.ParentRunner.run(ParentRunner.java:363)
    at org.junit.runner.JUnitCore.run(JUnitCore.java:137)
    at com.intellij.junit4.JUnit4IdeaTestRunner.startRunnerWithArgs(JUnit4IdeaTestRunner.java:68)
    at com.intellij.rt.execution.junit.IdeaTestRunner$Repeater.startRunnerWithArgs(IdeaTestRunner.java:51)
    at com.intellij.rt.execution.junit.JUnitStarter.prepareStreamsAndStart(JUnitStarter.java:242)
    at com.intellij.rt.execution.junit.JUnitStarter.main(JUnitStarter.java:70)
    at com.intellij.rt.execution.application.AppMainV2.main(AppMainV2.java:131)

Looks like it can't find the resource string for the title? The string appears to exist in res/values/strings.xml

I am using Android Studio 3.0.1.

I did need to set the working directory and delete the .gradle folder to get it to succeed while empty.

Any ideas?

4 Answers

vicentelee
vicentelee
6,662 Points
vicentelee
vicentelee
6,662 Points

Take a look at the top answer here https://stackoverflow.com/questions/45922916/robolectric-resourcesnotfoundexception-string-resource-id-with-android-gradle setting android.enableAapt2=false in the gradle.properties file worked for me

Boban Talevski
Boban Talevski
24,793 Points
Boban Talevski
Boban Talevski
24,793 Points

Had the same problem and what worked for me from the stackoverflow link mentioned in the other answer (the first thing I actually tried) is adding this to the build.gradle file

android {
  //..
  testOptions {
    unitTests {
      includeAndroidResources = true
    }
  }
}

Btw, I'm using the latest version of Robolectric currently available, not the SNAPSHOT release though.

testCompile 'org.robolectric:robolectric:3.6.1'
Hannah Olukoye
Hannah Olukoye
247 Points

Now using testImplementation 'org.robolectric:robolectric:4.3.1'

Omar Carino
Omar Carino
11,162 Points
Omar Carino
Omar Carino
11,162 Points

I just want to add to solutions above.

1) Make sure you're using the latest version of Android StudioI updated mine to (3.4) 2) You may have to update compileSdkVersion and targetSdkVersion to 28 3) You may have to update your buildToolsVersion to '28.0.3'

After all, that is set you should be able to add the solution mentioned above and it should all run smoothly!