Implement android test (#1141)

Executes AndroidTest through a Github action that runs an emulator and runs all android tests.

This commit only implements a very basic hello world test, but we can escalate it from here.

.github/workflows/android-test.yml

@@ -0,0 +1,17 @@
+name: "Android Test"
+
+on:
+  push:
+
+jobs:
+  test:
+    runs-on: macOS-latest
+    steps:
+      - name: checkout
+        uses: actions/checkout@v2
+
+      - name: run tests
+        uses: reactivecircus/android-emulator-runner@v2
+        with:
+          api-level: 28
+          script: "./gradlew kotest-tests-android:connectedCheck kotest-tests-android:testDebugUnitTest"

build.gradle

@@ -23,8 +23,14 @@ buildscript {
 
    dependencies {
       classpath "org.jetbrains.dokka:dokka-gradle-plugin:$dokkaVersion"
+      classpath 'com.android.tools.build:gradle:3.5.0'
       //    classpath "io.kotest:kotest-gradle-plugin:1.1.1-LOCAL"
    }
+
+   repositories {
+      mavenCentral()
+      google()
+   }
 }
 
 plugins {
@@ -43,6 +49,7 @@ allprojects {
    repositories {
       mavenCentral()
       jcenter()
+      google()
    }
 
    sourceCompatibility = 1.8

kotest-tests-android/build.gradle.kts

@@ -0,0 +1,64 @@
+import org.jetbrains.kotlin.config.KotlinCompilerVersion
+import org.jetbrains.kotlin.gradle.dsl.KotlinJvmOptions
+
+plugins {
+    id("com.android.application")
+    kotlin("android")
+    kotlin("android.extensions")
+    kotlin("kapt")
+}
+
+android {
+    compileSdkVersion(28)
+
+    compileOptions {
+        sourceCompatibility = JavaVersion.VERSION_1_8
+        targetCompatibility = JavaVersion.VERSION_1_8
+    }
+
+    lintOptions {
+        tasks.lint.get().enabled = false
+    }
+
+    kotlinOptions {
+        val opts = this as KotlinJvmOptions
+        opts.jvmTarget = "1.8"
+    }
+
+    defaultConfig {
+        applicationId = "io.kotlintest.androidtests"
+        minSdkVersion(21)
+        targetSdkVersion(28)
+
+        testInstrumentationRunner = "androidx.test.runner.AndroidJUnitRunner"
+    }
+
+    testOptions {
+        unitTests.isIncludeAndroidResources = true
+        unitTests.all(closureOf<Test> {
+            useJUnitPlatform()
+            testLogging.showStackTraces = true
+        } as groovy.lang.Closure<Test>)
+    }
+
+    packagingOptions {
+        exclude("META-INF/LICENSE.md")
+        exclude("META-INF/LICENSE-notice.md")
+    }
+}
+
+dependencies {
+    // Kotlin
+    implementation(kotlin("stdlib-jdk8", KotlinCompilerVersion.VERSION))
+    implementation("org.jetbrains.kotlin:kotlin-reflect:1.3.61")
+    implementation("org.jetbrains.kotlinx:kotlinx-serialization-runtime:0.14.0")
+
+    // Android
+    implementation("androidx.core:core-ktx:1.2.0-rc01")
+
+    // AndroidTest
+    androidTestImplementation("androidx.test.espresso:espresso-core:3.2.0")
+    androidTestImplementation("io.kotlintest:kotlintest-runner-junit4:3.4.2") { exclude(module = "objenesis") }
+    androidTestImplementation("androidx.test:core:1.2.0")
+    androidTestImplementation("androidx.test:core-ktx:1.2.0")
+}

kotest-tests-android/src/androidTest/java/io/kotest/androidtest/MainActivityTest.kt

@@ -0,0 +1,19 @@
+package io.kotest.androidtest
+
+import androidx.test.core.app.launchActivity
+import io.kotlintest.shouldBe
+import io.kotlintest.specs.StringSpec
+import kotlinx.android.synthetic.main.activity_main.textview
+
+class MainActivityTest : StringSpec() {
+
+    init {
+        "Hello World test" {
+            val scenario = launchActivity<MainActivity>()
+
+            scenario.onActivity { 
+                it.textview.text shouldBe "Kotest!"
+            }
+        }
+    }
+}

kotest-tests-android/src/main/AndroidManifest.xml

@@ -0,0 +1,12 @@
+<manifest xmlns:android="http://schemas.android.com/apk/res/android"
+    package="io.kotest.androidtest">
+
+    <application>
+        <activity android:name="io.kotest.androidtest.MainActivity">
+            <intent-filter>
+                <action android:name="android.intent.action.MAIN" />
+                <category android:name="android.intent.category.LAUNCHER" />
+            </intent-filter>
+        </activity>
+    </application>
+</manifest>

kotest-tests-android/src/main/java/io/kotest/androidtest/MainActivity.kt

@@ -0,0 +1,12 @@
+package io.kotest.androidtest
+
+import android.app.Activity
+import android.os.Bundle
+
+class MainActivity : Activity() {
+
+    override fun onCreate(savedInstanceState: Bundle?) {
+        super.onCreate(savedInstanceState)
+        setContentView(R.layout.activity_main)
+    }
+}

kotest-tests-android/src/main/res/layout/activity_main.xml

@@ -0,0 +1,14 @@
+<?xml version="1.0" encoding="utf-8"?>
+<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
+    xmlns:tools="http://schemas.android.com/tools"
+    android:layout_width="match_parent"
+    android:layout_height="match_parent"
+    tools:context="io.kotest.androidtest.MainActivity">
+
+    <TextView
+        android:id="@+id/textview"
+        android:layout_height="wrap_content" 
+        android:layout_width="wrap_content"
+        android:text="Kotest!"/>
+
+</LinearLayout>

kotest-tests-android/src/main/res/values/strings.xml

@@ -0,0 +1 @@
+<resources></resources>

settings.gradle.kts

@@ -22,3 +22,4 @@ include("kotest-tests:kotest-tests-timeout")
 //include("kotest-tests:kotest-tests-junit4-assertions")
 include("kotest-tests:kotest-tests-junit5")
 include("kotest-tests:kotest-tests-parallelism")
+include("kotest-tests-android")