Added Roboelectric and AndroidX Test suit

app/build.gradle

@@ -6,6 +6,14 @@ apply plugin: "androidx.navigation.safeargs.kotlin"
 android {
     compileSdkVersion rootProject.compileSdkVersion
 
+    /**
+     * Allows to access Android Resources in your unit tests, including AndroidManifest file.
+     * This will resolve "no such as manifest file: " warning.
+     */
+    testOptions.unitTests {
+        includeAndroidResources = true
+    }
+
     defaultConfig {
         applicationId "com.example.android.architecture.blueprints.reactive"
         minSdkVersion rootProject.minSdkVersion
@@ -54,6 +62,11 @@ dependencies {
     testImplementation "junit:junit:$junitVersion"
     testImplementation "com.google.truth:truth:1.1.2"
 
+    // AndroidX Test - JVM testing
+    testImplementation "androidx.test.ext:junit-ktx:$androidXTestExtKotlinRunnerVersion"
+    testImplementation "androidx.test:core-ktx:$androidXTestCoreVersion"
+    testImplementation "org.robolectric:robolectric:$robolectricVersion"
+
     // AndroidX Test - Instrumented testing
     androidTestImplementation "androidx.test.ext:junit:$androidXTestExtKotlinRunnerVersion"
     androidTestImplementation "androidx.test.espresso:espresso-core:$espressoVersion"

app/src/test/java/com/example/android/architecture/blueprints/todoapp/statistics/StatisticsUtilsTest.kt

@@ -3,8 +3,11 @@ package com.example.android.architecture.blueprints.todoapp.statistics
 import com.example.android.architecture.blueprints.todoapp.data.Task
 import com.google.common.truth.Truth
 import org.junit.Test
+import org.junit.runner.RunWith
+import org.junit.runners.JUnit4
 
 
+@RunWith(JUnit4::class)
 internal class StatisticsUtilsTest {
 
 

app/src/test/java/com/example/android/architecture/blueprints/todoapp/tasks/TasksViewModelTest.kt

@@ -0,0 +1,24 @@
+package com.example.android.architecture.blueprints.todoapp.tasks
+
+import androidx.test.core.app.ApplicationProvider
+import androidx.test.ext.junit.runners.AndroidJUnit4
+import org.junit.Test
+import org.junit.runner.RunWith
+
+
+@RunWith(AndroidJUnit4::class)
+internal class TasksViewModelTest {
+
+    @Test
+    fun addNewTask_setNewTask() {
+
+        // Assign a ViewModel
+        val tasksViewModel = TasksViewModel(ApplicationProvider.getApplicationContext())
+
+        // Assert adding a new Task
+        tasksViewModel.addNewTask()
+
+        // Act new Task is added
+        // TODO: Test live data.
+    }
+}

build.gradle

@@ -5,6 +5,7 @@ buildscript {
         google()
         mavenCentral()
     }
+
     dependencies {
         classpath 'com.android.tools.build:gradle:7.0.3'
         classpath "org.jetbrains.kotlin:kotlin-gradle-plugin:$kotlinVersion"
@@ -46,6 +47,7 @@ ext {
     recyclerViewVersion = '1.2.1'
     roomVersion = '2.3.0'
     rulesVersion = '1.0.1'
+    robolectricVersion = '4.10.3'
     swipeRefreshLayoutVersion = '1.1.0'
     timberVersion = '4.7.1'
 }