changes needed in gradle to run tests

build.gradle

@@ -1,6 +1,7 @@
 // Top-level build file where you can add configuration options common to all sub-projects/modules.
 
 buildscript {
+    ext.kotlin_version = '1.3.31'
     repositories {
         google()
         jcenter()
@@ -9,6 +10,7 @@ buildscript {
         classpath 'com.android.tools.build:gradle:3.4.0'
         classpath 'com.dicedmelon.gradle:jacoco-android:0.1.4'
         classpath 'org.kt3k.gradle.plugin:coveralls-gradle-plugin:2.8.2'
+        classpath "org.jetbrains.kotlin:kotlin-gradle-plugin:$kotlin_version"
         // NOTE: Do not place your application dependencies here; they belong
         // in the individual module build.gradle files
     }

core/build.gradle

@@ -1,4 +1,6 @@
 apply plugin: 'com.android.library'
+apply plugin: 'kotlin-android-extensions'
+apply plugin: 'kotlin-android'
 apply plugin: 'jacoco-android'
 apply plugin: 'com.github.kt3k.coveralls'
 
@@ -43,7 +45,7 @@ buildscript {
     ext.robolectric_version = '4.2'
     ext.androidx_test_core_version = '1.1.0'
     ext.mockito_inline_version = '2.13.0'
-    ext.assertj_version = '3.9.0';
+    ext.assertj_version = '3.9.0'
 }
 
 dependencies {
@@ -63,8 +65,10 @@ dependencies {
     testImplementation "junit:junit:$junit_version"
     testImplementation "org.robolectric:robolectric:$robolectric_version"
     testImplementation "androidx.test:core:$androidx_test_core_version"
-    testImplementation "org.mockito:mockito-inline:$mockito_inline_version" // Mockito inline adds support for mocking final classes and methods
+    testImplementation "org.mockito:mockito-inline:$mockito_inline_version"
+    // Mockito inline adds support for mocking final classes and methods
     testImplementation "org.assertj:assertj-core:$assertj_version"
     testAnnotationProcessor "com.google.dagger:dagger-compiler:$dagger_version"
     testAnnotationProcessor "com.google.dagger:dagger-android-processor:$dagger_version"
+    implementation "org.jetbrains.kotlin:kotlin-stdlib-jdk7:$kotlin_version"
 }