I'm trying to write tests for an android app. Which has one Activity and two fragments (i.e FragmentOne and FragmentTwo) by clicking a button on FragmentOne it goes to the FragmentTwo. And I wrote the test for the same and I'm using androidx and navigation architecture. I have read this link and this link but didn't succeed.
Here is my current code-
ExampleInstrumentedTest
@RunWith(JUnit4::class)
class ExampleInstrumentedTest {
@Test
fun checkSecondFrag() {
// Create a mock NavController
val mockNavController = mock(NavController::class.java)
// Create a graphical FragmentScenario for the OneFragment
val oneFragmentScenario = launchFragmentInContainer<OneFragment>()
// Set the NavController property on the fragment
oneFragmentScenario.onFragment { fragment ->
Navigation.setViewNavController(fragment.requireView(), mockNavController)
}
// Verify that performing a click prompts the correct Navigation action
onView(ViewMatchers.withId(R.id.nextFragment)).perform(ViewActions.click())
verify(mockNavController).navigate(R.id.action_oneFragment_to_twoFragment)
}
}
Gradle(App)
apply plugin: 'com.android.application'
apply plugin: 'kotlin-android'
apply plugin: 'kotlin-android-extensions'
android {
compileSdkVersion 28
defaultConfig {
applicationId "com.varun.navtesting"
minSdkVersion 16
targetSdkVersion 28
versionCode 1
versionName "1.0"
testInstrumentationRunner "androidx.test.runner.AndroidJUnitRunner"
}
buildTypes {
release {
minifyEnabled false
proguardFiles getDefaultProguardFile('proguard-android-optimize.txt'), 'proguard-rules.pro'
}
}
}
dependencies {
implementation fileTree(dir: 'libs', include: ['*.jar'])
implementation "org.jetbrains.kotlin:kotlin-stdlib-jdk7:$kotlin_version"
implementation 'androidx.appcompat:appcompat:1.0.2'
implementation 'androidx.core:core-ktx:1.0.2'
implementation 'androidx.constraintlayout:constraintlayout:1.1.3'
implementation 'androidx.legacy:legacy-support-v4:1.0.0'
// Core library
androidTestImplementation 'androidx.test:core:1.2.0'
// AndroidJUnitRunner and JUnit Rules
androidTestImplementation 'androidx.test:runner:1.2.0'
androidTestImplementation 'androidx.test:rules:1.2.0'
// Assertions
androidTestImplementation 'androidx.test.ext:junit:1.1.1'
androidTestImplementation 'androidx.test.ext:truth:1.2.0'
androidTestImplementation 'com.google.truth:truth:0.42'
// Espresso dependencies
androidTestImplementation 'androidx.test.espresso:espresso-core:3.2.0'
androidTestImplementation 'androidx.test.espresso:espresso-contrib:3.2.0'
androidTestImplementation 'androidx.test.espresso:espresso-intents:3.2.0'
androidTestImplementation 'androidx.test.espresso:espresso-accessibility:3.2.0'
androidTestImplementation 'androidx.test.espresso:espresso-web:3.2.0'
androidTestImplementation 'androidx.test.espresso.idling:idling-concurrent:3.2.0'
testImplementation 'junit:junit:4.12'
implementation 'androidx.navigation:navigation-fragment-ktx:2.0.0'
implementation 'androidx.navigation:navigation-ui-ktx:2.0.0'
// required if you want to use Mockito for unit tests
testImplementation 'org.mockito:mockito-core:2.25.0'
// required if you want to use Mockito for Android tests
androidTestImplementation 'org.mockito:mockito-android:2.19.0'
// Fragment test
implementation 'androidx.fragment:fragment:1.2.0-alpha01'
androidTestImplementation 'androidx.fragment:fragment-testing:1.2.0-alpha01'
implementation 'com.android.support:support-annotations:28.0.0'
}
Mainfiest
<?xml version="1.0" encoding="utf-8"?>
<manifest
xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
package="com.varun.navtesting">
<application
android:allowBackup="true"
android:icon="@mipmap/ic_launcher"
android:label="@string/app_name"
android:roundIcon="@mipmap/ic_launcher_round"
android:supportsRtl="true"
android:theme="@style/AppTheme" tools:ignore="GoogleAppIndexingWarning">
<activity android:name=".MainActivity">
<intent-filter>
<action android:name="android.intent.action.MAIN"/>
<category android:name="android.intent.category.LAUNCHER"/>
</intent-filter>
</activity>
<uses-library android:name="android.test.runner"
android:required="false"/>
<uses-library android:name="android.test.base"
android:required="false"/>
<uses-library android:name="android.test.mock"
android:required="false"/>
</application>
<instrumentation android:targetPackage="com.varun.navtesting"
android:name="android.test.ExampleInstrumentedTest"/>
</manifest>
This line
<instrumentation
android:targetPackage="com.varun.navtesting"
android:name="android.test.ExampleInstrumentedTest"/>
is showing in red color in android studio.
Here is the Logcat
2019-07-30 22:00:16.967 6821-6837/com.varun.navtesting E/TestRunner: failed: checkSecondFrag(com.varun.navtesting.ExampleInstrumentedTest)
2019-07-30 22:00:16.967 6821-6837/com.varun.navtesting E/TestRunner: ----- begin exception -----
2019-07-30 22:00:16.968 6821-6837/com.varun.navtesting E/TestRunner: java.lang.RuntimeException: Unable to resolve activity for: Intent { act=android.intent.action.MAIN cat=[android.intent.category.LAUNCHER] cmp=com.varun.navtesting/androidx.fragment.app.testing.FragmentScenario$EmptyFragmentActivity (has extras) }
at androidx.test.core.app.InstrumentationActivityInvoker.startActivity(InstrumentationActivityInvoker.java:344)
at androidx.test.core.app.ActivityScenario.launchInternal(ActivityScenario.java:231)
at androidx.test.core.app.ActivityScenario.launch(ActivityScenario.java:209)
at androidx.fragment.app.testing.FragmentScenario.internalLaunch(FragmentScenario.java:299)
at androidx.fragment.app.testing.FragmentScenario.launchInContainer(FragmentScenario.java:282)
at com.varun.navtesting.ExampleInstrumentedTest.checkSecondFrag(ExampleInstrumentedTest.kt:39)
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 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$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.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$2.evaluate(ParentRunner.java:268)
at org.junit.runners.ParentRunner.run(ParentRunner.java:363)
at org.junit.runner.JUnitCore.run(JUnitCore.java:137)
at org.junit.runner.JUnitCore.run(JUnitCore.java:115)
at androidx.test.internal.runner.TestExecutor.execute(TestExecutor.java:56)
at androidx.test.runner.AndroidJUnitRunner.onStart(AndroidJUnitRunner.java:392)
at android.app.Instrumentation$InstrumentationThread.run(Instrumentation.java:2145)
2019-07-30 22:00:16.968 6821-6837/com.varun.navtesting E/TestRunner: ----- end exception -----
Any help will be appriciated.
As per the Fragment testing page, you must use debugImplementation for the fragment-testing artifact:
debugImplementation 'androidx.fragment:fragment-testing:1.2.0-alpha01'