Add some UI tests

build.gradle

@@ -14,11 +14,15 @@ buildscript {
         constraintlayout_version = '2.0.0-beta3'
         dynamicanimation_version = '1.0.0'
         navigation_version = '2.1.0'
+        espresso_version = '3.2.0'
+        robolectric_version = '4.3.1'
+        androidxtest_version = '1.2.0'
+        androidxtest_junit_version = '1.1.1'
+        mockk_version = '1.9.3'
     }
     repositories {
         google()
         jcenter()
-
     }
     dependencies {
         classpath 'com.android.tools.build:gradle:3.5.2'
@@ -34,6 +38,11 @@ allprojects {
         google()
         jcenter()
     }
+    configurations.all {
+        resolutionStrategy {
+            force("org.objenesis:objenesis:2.6")
+        }
+    }
 }
 
 task clean(type: Delete) {

library/build.gradle

@@ -14,6 +14,8 @@ android {
         testInstrumentationRunner "androidx.test.runner.AndroidJUnitRunner"
 
         archivesBaseName = "$archivesBaseName-$versionName"
+
+        multiDexEnabled true
     }
 
     buildTypes {
@@ -22,6 +24,23 @@ android {
             proguardFiles getDefaultProguardFile('proguard-android-optimize.txt'), 'proguard-rules.pro'
         }
     }
+
+    testOptions {
+        unitTests {
+            includeAndroidResources true
+        }
+    }
+
+    sourceSets {
+        androidTest {
+            manifest.srcFile 'src/uiTest/AndroidManifest.xml'
+            java.srcDirs += "src/uiTest/java"
+        }
+        test {
+            manifest.srcFile 'src/uiTest/AndroidManifest.xml'
+            java.srcDirs += "src/uiTest/java"
+        }
+    }
 }
 
 dependencies {
@@ -32,9 +51,18 @@ dependencies {
     implementation "androidx.core:core-ktx:$corektx_version"
     api "androidx.dynamicanimation:dynamicanimation:$dynamicanimation_version"
 
-    testImplementation 'junit:junit:4.12'
-    androidTestImplementation 'androidx.test:runner:1.2.0'
-    androidTestImplementation 'androidx.test.espresso:espresso-core:3.2.0'
+    implementation "androidx.multidex:multidex:2.0.1"
+
+    testImplementation "androidx.test.ext:truth:$androidxtest_version"
+    testImplementation "androidx.test.ext:junit:$androidxtest_junit_version"
+    testImplementation "org.robolectric:robolectric:$robolectric_version"
+    testImplementation "io.mockk:mockk:$mockk_version"
+
+    androidTestImplementation "androidx.test.ext:truth:$androidxtest_version"
+    androidTestImplementation "androidx.test.ext:junit:$androidxtest_junit_version"
+    androidTestImplementation "androidx.test:runner:$androidxtest_version"
+    androidTestImplementation "org.robolectric:annotations:$robolectric_version"
+    androidTestImplementation "io.mockk:mockk-android:$mockk_version"
 }
 
 repositories {

library/src/androidTest/java/com/github/lcdsmao/springx/InstrumentationUiTestScope.kt

@@ -0,0 +1,24 @@
+package com.github.lcdsmao.springx
+
+import androidx.test.platform.app.InstrumentationRegistry
+
+@Suppress("unused")
+class InstrumentationUiTestScope : UiTestScope {
+
+  override fun runOnMainSync(block: () -> Unit) {
+    InstrumentationRegistry.getInstrumentation().runOnMainSync {
+      block.invoke()
+    }
+  }
+
+  override fun waitForIdleSync() {
+    InstrumentationRegistry.getInstrumentation().waitForIdleSync()
+  }
+
+  class Runner : UiTestScope.Runner {
+
+    override fun runUiTest(block: () -> Unit) {
+      block.invoke()
+    }
+  }
+}

library/src/main/res/layout/activity_animation.xml

@@ -0,0 +1,12 @@
+<?xml version="1.0" encoding="utf-8"?>
+<FrameLayout xmlns:android="http://schemas.android.com/apk/res/android"
+    android:layout_width="match_parent"
+    android:layout_height="match_parent">
+
+    <View
+        android:id="@+id/anim_view"
+        android:background="#D81B60"
+        android:layout_width="24dp"
+        android:layout_height="24dp"
+        android:layout_gravity="center" />
+</FrameLayout>

library/src/test/java/com/github/lcdsmao/springx/UnitUiTestScope.kt

@@ -0,0 +1,46 @@
+package com.github.lcdsmao.springx
+
+import android.os.Handler
+import android.os.Looper
+import org.robolectric.shadows.ShadowLooper
+import java.util.concurrent.CountDownLatch
+import kotlin.concurrent.thread
+
+@Suppress("unused")
+class UnitUiTestScope : UiTestScope {
+
+  private val mainHandler = Handler(Looper.getMainLooper())
+
+  override fun runOnMainSync(block: () -> Unit) {
+    val latch = CountDownLatch(1)
+    mainHandler.post {
+      try {
+        block.invoke()
+      } finally {
+        latch.countDown()
+      }
+    }
+    latch.await()
+  }
+
+  override fun waitForIdleSync() {
+    val latch = CountDownLatch(1)
+    mainHandler.post {
+      ShadowLooper.idleMainLooper()
+      latch.countDown()
+    }
+    latch.await()
+  }
+
+  class Runner : UiTestScope.Runner {
+
+    override fun runUiTest(block: () -> Unit) {
+      val testThread = thread(name = "Unit UI Test Thread") {
+        block.invoke()
+      }
+      while (testThread.isAlive) {
+        ShadowLooper.idleMainLooper()
+      }
+    }
+  }
+}

library/src/uiTest/AndroidManifest.xml

@@ -0,0 +1,7 @@
+<manifest xmlns:android="http://schemas.android.com/apk/res/android"
+    package="com.github.lcdsmao.springx">
+
+    <application android:theme="@style/Theme.AppCompat">
+        <activity android:name=".AnimationActivity" />
+    </application>
+</manifest>

library/src/uiTest/java/com/github/lcdsmao/springx/AnimationActivity.kt

@@ -0,0 +1,5 @@
+package com.github.lcdsmao.springx
+
+import androidx.appcompat.app.AppCompatActivity
+
+class AnimationActivity : AppCompatActivity(R.layout.activity_animation)

library/src/uiTest/java/com/github/lcdsmao/springx/UiTestScope.kt

@@ -0,0 +1,28 @@
+package com.github.lcdsmao.springx
+
+interface UiTestScope {
+
+  interface Runner {
+    fun runUiTest(block: () -> Unit)
+  }
+
+  fun runOnMainSync(block: () -> Unit)
+  fun waitForIdleSync()
+}
+
+fun runUiTest(uiTestScope: UiTestScope.() -> Unit) {
+  val (scope, runner) = getUiTestDelegate()
+  runner.runUiTest { uiTestScope(scope) }
+}
+
+private fun getUiTestDelegate(): Pair<UiTestScope, UiTestScope.Runner> {
+  val testScopeName =
+    if (System.getProperty("java.runtime.name")!!.toLowerCase().contains("android")) {
+      "com.github.lcdsmao.springx.InstrumentationUiTestScope"
+    } else {
+      "com.github.lcdsmao.springx.UnitUiTestScope"
+    }
+  val runnerName = "$testScopeName\$Runner"
+  return Class.forName(testScopeName).newInstance() as UiTestScope to
+    Class.forName(runnerName).newInstance() as UiTestScope.Runner
+}