For mozilla-mobile#1481. Use androidx runner in feature-readerview.

Author: dector

components/feature/prompts/src/test/java/mozilla/ext/context.kt

@@ -9,5 +9,10 @@ import androidx.appcompat.R
 import androidx.appcompat.view.ContextThemeWrapper
 import mozilla.components.support.test.robolectric.testContext
 
+/**
+ * `testContext` wrapped with AppCompat theme.
+ *
+ * Useful for views that uses theme attributes, for example.
+ */
 internal val appCompatContext: Context
     get() = ContextThemeWrapper(testContext, R.style.Theme_AppCompat)

components/feature/readerview/build.gradle

@@ -19,6 +19,8 @@ android {
             proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'
         }
     }
+
+    testOptions.unitTests.includeAndroidResources = true
 }
 
 dependencies {
@@ -37,7 +39,7 @@ dependencies {
 
     testImplementation project(':support-test')
     testImplementation Dependencies.androidx_test_core
-    testImplementation Dependencies.testing_junit
+    testImplementation Dependencies.androidx_test_junit
     testImplementation Dependencies.testing_robolectric
     testImplementation Dependencies.testing_mockito
 }

components/feature/readerview/gradle.properties

@@ -0,0 +1,2 @@
+# TODO remove and enable globally
+android.enableUnitTestBinaryResources=true