Convert tests into Kotlin

Author: whym

app/build.gradle

@@ -1,4 +1,6 @@
 apply plugin: 'com.android.application'
+apply plugin: 'kotlin-android'
+apply plugin: 'kotlin-kapt'
 apply plugin: 'jacoco-android'
 apply from: 'quality.gradle'
 apply plugin: 'com.getkeepsafe.dexcount'
@@ -19,14 +21,15 @@ dependencies {
         transitive=true
     }
 
+
     implementation "com.android.support:support-v4:${project.supportLibVersion}"
     implementation "com.android.support:appcompat-v7:${project.supportLibVersion}"
     implementation "com.android.support:design:${project.supportLibVersion}"
 
     implementation "com.android.support:cardview-v7:${project.supportLibVersion}"
 
     implementation "com.jakewharton:butterknife:$BUTTERKNIFE_VERSION"
-    annotationProcessor "com.jakewharton:butterknife-compiler:$BUTTERKNIFE_VERSION"
+    kapt "com.jakewharton:butterknife-compiler:$BUTTERKNIFE_VERSION"
 
     implementation 'com.squareup.okhttp3:okhttp:3.8.1'
     implementation 'com.squareup.okio:okio:1.13.0'
@@ -46,8 +49,11 @@ dependencies {
     implementation "com.google.dagger:dagger:$DAGGER_VERSION"
     implementation "com.google.dagger:dagger-android-support:$DAGGER_VERSION"
 
-    annotationProcessor "com.google.dagger:dagger-android-processor:$DAGGER_VERSION"
-    annotationProcessor "com.google.dagger:dagger-compiler:$DAGGER_VERSION"
+    kapt "com.google.dagger:dagger-android-processor:$DAGGER_VERSION"
+    kapt "com.google.dagger:dagger-compiler:$DAGGER_VERSION"
+
+    testImplementation "org.jetbrains.kotlin:kotlin-stdlib-jre7:$kotlin_version"
+    androidTestImplementation "org.jetbrains.kotlin:kotlin-stdlib-jre7:$kotlin_version"
 
     testImplementation 'junit:junit:4.12'
     testImplementation 'org.robolectric:robolectric:3.4'
@@ -78,6 +84,10 @@ android {
         vectorDrawables.useSupportLibrary = true
     }
 
+    sourceSets {
+        test.java.srcDirs += 'src/test/kotlin'
+    }
+
     buildTypes {
         release {
             minifyEnabled false // See https://stackoverflow.com/questions/40232404/google-play-apk-and-android-studio-apk-usb-debug-behaving-differently - proguard.cfg modification alone insufficient.

app/src/test/java/fr/free/nrw/commons/UtilsTest.java

@@ -0,0 +1,32 @@
+package fr.free.nrw.commons
+
+import org.hamcrest.CoreMatchers.`is` as _is
+
+import org.junit.Assert
+import org.junit.Test
+
+class UtilsTest {
+    @Test fun `strip nothing from non-localized string`() {
+        Assert.assertThat(Utils.stripLocalizedString("Hello"), _is("Hello"))
+    }
+
+    @Test fun `strip tag from Japanese string`() {
+        Assert.assertThat(Utils.stripLocalizedString("\"こんにちは\"@ja"), _is("こんにちは"))
+    }
+
+    @Test fun `capitalize first letter`() {
+        Assert.assertThat(Utils.capitalize("hello"), _is("Hello"))
+    }
+
+    @Test fun `capitalize - pass all-capital string as it is`() {
+        Assert.assertThat(Utils.capitalize("HELLO"), _is("HELLO"))
+    }
+
+    @Test fun `capitalize - pass numbers`() {
+        Assert.assertThat(Utils.capitalize("12x"), _is("12x"))
+    }
+
+    @Test fun `capitalize - pass Japanase characters`() {
+        Assert.assertThat(Utils.capitalize("こんにちは"), _is("こんにちは"))
+    }
+}

app/src/test/kotlin/fr/free/nrw/commons/UtilsTest.kt

@@ -1,5 +1,6 @@
 // Top-level build file where you can add configuration options common to all sub-projects/modules.
 buildscript {
+    ext.kotlin_version = '1.1.51'
     repositories {
         jcenter()
         mavenCentral()
@@ -10,6 +11,7 @@ buildscript {
         classpath 'com.dicedmelon.gradle:jacoco-android:0.1.1'
         classpath 'com.getkeepsafe.dexcount:dexcount-gradle-plugin:0.7.1'
         classpath 'me.tatarka:gradle-retrolambda:3.6.1'
+        classpath "org.jetbrains.kotlin:kotlin-gradle-plugin:$kotlin_version"
     }
 }