Issue#5 Shows basic example of testing NavController usage
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20 changed files with 383 additions and 2 deletions
1
examplecase/example-navcontroller/.gitignore
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examplecase/example-navcontroller/.gitignore
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/build
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67
examplecase/example-navcontroller/build.gradle
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examplecase/example-navcontroller/build.gradle
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plugins {
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id 'com.android.library'
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id 'org.jetbrains.kotlin.android'
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id 'androidx.navigation.safeargs.kotlin'
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}
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android {
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compileSdk 31
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defaultConfig {
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minSdk 21
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targetSdk 31
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testInstrumentationRunner "androidx.test.runner.AndroidJUnitRunner"
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consumerProguardFiles "consumer-rules.pro"
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}
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buildTypes {
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release {
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minifyEnabled false
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proguardFiles getDefaultProguardFile('proguard-android-optimize.txt'), 'proguard-rules.pro'
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}
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}
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compileOptions {
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sourceCompatibility JavaVersion.VERSION_1_8
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targetCompatibility JavaVersion.VERSION_1_8
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}
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kotlinOptions {
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jvmTarget = '1.8'
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}
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sourceSets {
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androidTest {
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java.srcDirs += "src/sharedTest/java"
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assets.srcDirs += files("$projectDir/schemas".toString())
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}
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test {
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java.srcDirs += "src/sharedTest/java"
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java.srcDirs += "src/robolectricTest/java"
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resources.srcDirs += files("$projectDir/schemas".toString())
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}
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}
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// needed for androidTest
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packagingOptions {
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exclude 'META-INF/LGPL2.1'
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exclude 'META-INF/AL2.0'
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exclude 'META-INF/LICENSE.md'
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exclude 'META-INF/LICENSE-notice.md'
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}
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}
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dependencies {
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implementation "androidx.core:core-ktx:$androidx_core_version"
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implementation "androidx.appcompat:appcompat:$androidx_appcompat_version"
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implementation "com.google.android.material:material:$androidx_material_version"
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implementation "androidx.navigation:navigation-fragment-ktx:$navigation_version"
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implementation "androidx.navigation:navigation-ui-ktx:$navigation_version"
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debugImplementation "androidx.fragment:fragment-testing:1.5.3"
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applyAppTestDependenciesTo(this)
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testImplementation "androidx.navigation:navigation-testing:$navigation_version"
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testImplementation project(':test-util-android')
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androidTestImplementation project(':test-util-android')
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androidTestImplementation "androidx.navigation:navigation-testing:$navigation_version"
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}
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0
examplecase/example-navcontroller/consumer-rules.pro
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0
examplecase/example-navcontroller/consumer-rules.pro
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21
examplecase/example-navcontroller/proguard-rules.pro
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examplecase/example-navcontroller/proguard-rules.pro
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# Add project specific ProGuard rules here.
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# You can control the set of applied configuration files using the
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# proguardFiles setting in build.gradle.
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#
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# For more details, see
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# http://developer.android.com/guide/developing/tools/proguard.html
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# If your project uses WebView with JS, uncomment the following
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# and specify the fully qualified class name to the JavaScript interface
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# class:
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#-keepclassmembers class fqcn.of.javascript.interface.for.webview {
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# public *;
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#}
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# Uncomment this to preserve the line number information for
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# debugging stack traces.
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#-keepattributes SourceFile,LineNumberTable
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# If you keep the line number information, uncomment this to
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# hide the original source file name.
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#-renamesourcefileattribute SourceFile
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<?xml version="1.0" encoding="utf-8"?>
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<manifest xmlns:android="http://schemas.android.com/apk/res/android"
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package="org.fnives.test.showcase.examplecase.navcontroller">
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<application>
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<activity android:name=".NavControllerActivity" android:exported="true"/>
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</application>
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</manifest>
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package org.fnives.test.showcase.examplecase.navcontroller
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import android.os.Bundle
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import android.view.View
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import android.widget.TextView
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import androidx.fragment.app.Fragment
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import androidx.navigation.fragment.navArgs
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class DetailFragment : Fragment(R.layout.fragment_detail) {
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private val args by navArgs<DetailFragmentArgs>()
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override fun onViewCreated(view: View, savedInstanceState: Bundle?) {
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super.onViewCreated(view, savedInstanceState)
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(view as TextView).text = getString(R.string.home_item, args.position)
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}
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}
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package org.fnives.test.showcase.examplecase.navcontroller
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import android.os.Bundle
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import android.view.LayoutInflater
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import android.view.View
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import android.view.ViewGroup
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import android.widget.Button
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import androidx.fragment.app.Fragment
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import androidx.navigation.fragment.findNavController
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import androidx.recyclerview.widget.LinearLayoutManager
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import androidx.recyclerview.widget.RecyclerView
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class HomeFragment : Fragment(R.layout.fragment_home) {
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override fun onViewCreated(view: View, savedInstanceState: Bundle?) {
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super.onViewCreated(view, savedInstanceState)
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val recycler = view.findViewById<RecyclerView>(R.id.recycler)
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recycler.layoutManager = LinearLayoutManager(view.context)
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recycler.adapter = Adapter(onClick = {
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if (findNavController().currentDestination?.id != R.id.homeFragment) return@Adapter
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findNavController().navigate(HomeFragmentDirections.actionHomeFragmentToDetailFragment(it))
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})
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}
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class ViewHolder(view: View) : RecyclerView.ViewHolder(view) {
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constructor(parent: ViewGroup) : this(LayoutInflater.from(parent.context).inflate(R.layout.item_home, parent, false))
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}
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class Adapter(
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private val count: Int = 30,
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private val onClick: (Int) -> Unit,
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) : RecyclerView.Adapter<ViewHolder>() {
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override fun getItemCount(): Int = count
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override fun onCreateViewHolder(parent: ViewGroup, viewType: Int): ViewHolder =
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ViewHolder(parent)
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override fun onBindViewHolder(holder: ViewHolder, position: Int) {
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val context = holder.itemView.context
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(holder.itemView as Button).text = context.getString(R.string.home_item, position)
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holder.itemView.setOnClickListener { onClick(position) }
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}
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}
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}
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package org.fnives.test.showcase.examplecase.navcontroller
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import android.os.Bundle
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import androidx.appcompat.app.AppCompatActivity
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// to see the actual screen, not just in test use:
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// adb shell am start -n org.fnives.test.showcase/org.fnives.test.showcase.examplecase.navcontroller.NavControllerActivity
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// after installing the apk
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class NavControllerActivity : AppCompatActivity() {
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override fun onCreate(savedInstanceState: Bundle?) {
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super.onCreate(savedInstanceState)
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setContentView(R.layout.activity_nav_controller)
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}
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}
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<?xml version="1.0" encoding="utf-8"?>
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<androidx.constraintlayout.widget.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android"
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xmlns:app="http://schemas.android.com/apk/res-auto"
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android:layout_width="match_parent"
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android:layout_height="match_parent">
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<androidx.appcompat.widget.Toolbar
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android:id="@+id/toolbar"
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android:layout_width="0dp"
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android:layout_height="wrap_content"
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app:title="@string/activity_title"
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app:layout_constraintEnd_toEndOf="parent"
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app:layout_constraintStart_toStartOf="parent"
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app:layout_constraintTop_toTopOf="parent" />
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<androidx.fragment.app.FragmentContainerView
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android:id="@+id/nav_host_container"
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android:name="androidx.navigation.fragment.NavHostFragment"
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android:layout_width="0dp"
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android:layout_height="0dp"
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app:defaultNavHost="true"
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app:layout_constraintBottom_toBottomOf="parent"
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app:layout_constraintEnd_toEndOf="parent"
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app:layout_constraintStart_toStartOf="parent"
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app:layout_constraintTop_toBottomOf="@id/toolbar"
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app:navGraph="@navigation/nav_example" />
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</androidx.constraintlayout.widget.ConstraintLayout>
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<?xml version="1.0" encoding="utf-8"?>
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<TextView xmlns:android="http://schemas.android.com/apk/res/android"
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xmlns:tools="http://schemas.android.com/tools"
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android:layout_width="match_parent"
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android:layout_height="match_parent"
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android:gravity="center"
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android:textAppearance="?attr/textAppearanceHeadline1"
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tools:text="Item 5">
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</TextView>
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<?xml version="1.0" encoding="utf-8"?>
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<androidx.recyclerview.widget.RecyclerView xmlns:android="http://schemas.android.com/apk/res/android"
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xmlns:tools="http://schemas.android.com/tools"
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android:id="@+id/recycler"
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android:layout_width="match_parent"
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tools:listitem="@layout/item_home"
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tools:itemCount="30"
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android:layout_height="match_parent" />
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<?xml version="1.0" encoding="utf-8"?>
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<Button xmlns:android="http://schemas.android.com/apk/res/android"
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xmlns:tools="http://schemas.android.com/tools"
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android:id="@+id/item_cta"
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android:layout_width="match_parent"
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android:layout_height="wrap_content"
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android:minHeight="48dp"
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android:textAppearance="?attr/textAppearanceHeadline4"
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tools:text="Item: 5" />
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<?xml version="1.0" encoding="utf-8"?>
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<navigation xmlns:android="http://schemas.android.com/apk/res/android"
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xmlns:app="http://schemas.android.com/apk/res-auto"
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xmlns:tools="http://schemas.android.com/tools"
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android:id="@+id/nav_example.xml"
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app:startDestination="@id/homeFragment">
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<fragment
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android:id="@+id/homeFragment"
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android:name="org.fnives.test.showcase.examplecase.navcontroller.HomeFragment"
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tools:layout="@layout/fragment_home"
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android:label="HomeFragment" >
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<action
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android:id="@+id/action_homeFragment_to_detailFragment"
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app:destination="@id/detailFragment" />
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</fragment>
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<fragment
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android:id="@+id/detailFragment"
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android:name="org.fnives.test.showcase.examplecase.navcontroller.DetailFragment"
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tools:layout="@layout/fragment_detail"
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android:label="DetailFragment" >
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<argument
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android:name="position"
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app:argType="integer" />
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</fragment>
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</navigation>
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<?xml version="1.0" encoding="utf-8"?>
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<resources>
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<string name="home_item">Item %1$d</string>
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<string name="activity_title">Nav Controller Example</string>
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</resources>
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package org.fnives.test.showcase.examplecase.navcontroller
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import android.os.Bundle
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import androidx.fragment.app.Fragment
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import androidx.fragment.app.testing.FragmentScenario
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import androidx.fragment.app.testing.launchFragmentInContainer
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import androidx.navigation.Navigation
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import androidx.navigation.testing.TestNavHostController
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import androidx.recyclerview.widget.RecyclerView
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import androidx.test.core.app.ApplicationProvider
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import androidx.test.espresso.Espresso
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import androidx.test.espresso.action.ViewActions
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import androidx.test.espresso.contrib.RecyclerViewActions
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import androidx.test.espresso.matcher.ViewMatchers
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import androidx.test.ext.junit.runners.AndroidJUnit4
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import org.fnives.test.showcase.android.testutil.viewaction.recycler.RemoveItemAnimations
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import org.hamcrest.Matchers
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import org.junit.Assert
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import org.junit.Before
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import org.junit.Test
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import org.junit.runner.RunWith
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/**
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* Shows basic navigation test from a ListScreen to a Detail Screen.
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*
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* Sets up TestNavController and shows how it can be used to verify proper arguments, destination.
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*
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* For more info check out https://developer.android.com/guide/navigation/navigation-testing
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*/
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@RunWith(AndroidJUnit4::class)
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class HomeNavigationTest {
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private lateinit var fragmentScenario: FragmentScenario<HomeFragment>
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private lateinit var testNavController: TestNavHostController
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@Before
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fun setup() {
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testNavController = TestNavHostController(ApplicationProvider.getApplicationContext())
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fragmentScenario = launchFragmentInContainer()
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fragmentScenario.runOnMain { testNavController.setGraph(R.navigation.nav_example) }
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fragmentScenario.onFragment { fragment ->
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Navigation.setViewNavController(fragment.requireView(), testNavController)
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}
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Espresso.onView(ViewMatchers.withId(R.id.recycler))
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.perform(RemoveItemAnimations())
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}
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@Test
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fun clickingOnItemNavigatesProperlyAndBackstackIsCorrect() {
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val position = 25
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Espresso.onView(ViewMatchers.withId(R.id.recycler))
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.perform(RecyclerViewActions.scrollToPosition<RecyclerView.ViewHolder>(position))
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Espresso.onView(
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Matchers.allOf(
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ViewMatchers.withText("Item $position"), ViewMatchers.withId(R.id.item_cta),
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ViewMatchers.withParent(ViewMatchers.withId(R.id.recycler))
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)
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)
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.perform(ViewActions.click())
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Assert.assertEquals(R.id.detailFragment, testNavController.currentDestination?.id)
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}
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@Test
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fun clickingOnItemTwiceNavigatesProperly() {
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val position = 16
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Espresso.onView(ViewMatchers.withId(R.id.recycler))
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.perform(RecyclerViewActions.scrollToPosition<RecyclerView.ViewHolder>(position))
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Espresso.onView(
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Matchers.allOf(
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ViewMatchers.withText("Item $position"), ViewMatchers.withId(R.id.item_cta),
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ViewMatchers.withParent(ViewMatchers.withId(R.id.recycler))
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)
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)
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.perform(ViewActions.click())
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.perform(ViewActions.click())
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Assert.assertEquals(R.id.detailFragment, testNavController.currentDestination?.id)
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Assert.assertEquals(listOf(R.id.nav_example_xml, R.id.homeFragment, R.id.detailFragment), testNavController.backStack.map { it.destination.id })
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testNavController.backStack.map { it.arguments }
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}
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@Test
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fun clickingOnTwoItemsOpensOnlyTheFirst() {
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val position1 = 16
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val position2 = 15
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Espresso.onView(ViewMatchers.withId(R.id.recycler))
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.perform(RecyclerViewActions.scrollToPosition<RecyclerView.ViewHolder>(position1))
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Espresso.onView(itemViewMatcher(position1)).perform(ViewActions.click())
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Espresso.onView(itemViewMatcher(position2)).perform(ViewActions.click())
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Assert.assertEquals(R.id.detailFragment, testNavController.currentDestination?.id)
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Assert.assertEquals(listOf(R.id.nav_example_xml, R.id.homeFragment, R.id.detailFragment), testNavController.backStack.map { it.destination.id })
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val actualArgs = DetailFragmentArgs.fromBundle(testNavController.backStack.last().arguments ?: Bundle())
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Assert.assertEquals(position1, actualArgs.position)
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}
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private fun itemViewMatcher(position: Int) =
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Matchers.allOf(
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ViewMatchers.withText("Item $position"), ViewMatchers.withId(R.id.item_cta),
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ViewMatchers.withParent(ViewMatchers.withId(R.id.recycler))
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)
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companion object {
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inline fun <T : Fragment> FragmentScenario<T>.runOnMain(crossinline action: () -> Unit) {
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onFragment { action() }
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}
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}
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}
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sdk=22,28
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instrumentedPackages=androidx.loader.content
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