Add tests to the sample project

build.gradle

@@ -40,4 +40,7 @@ ext {
 
   androidToolsVersion = '3.0.1'
   supportVersion = '27.0.2'
+
+  runnerVersion = '1.0.1'
+  espressoVersion = '3.0.1'
 }

sample/build.gradle

@@ -19,6 +19,8 @@ android {
     targetSdkVersion 27
     versionCode 1
     versionName "1.0"
+
+    testInstrumentationRunner "android.support.test.runner.AndroidJUnitRunner"
   }
 
   signingConfigs {
@@ -32,7 +34,7 @@ android {
 
   buildTypes {
     debug {
-      minifyEnabled true
+      minifyEnabled false
       proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'
     }
 
@@ -46,4 +48,9 @@ android {
 
 dependencies {
   implementation "com.android.support:appcompat-v7:$supportVersion"
+
+  testImplementation "junit:junit:$junitVersion"
+
+  androidTestImplementation "com.android.support.test:runner:$runnerVersion"
+  androidTestImplementation "com.android.support.test.espresso:espresso-core:$espressoVersion"
 }

sample/src/androidTest/java/io/michaelrocks/paranoid/sample/MainActivityTest.java

@@ -0,0 +1,46 @@
+/*
+ * Copyright 2018 Michael Rozumyanskiy
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package io.michaelrocks.paranoid.sample;
+
+import android.support.test.filters.LargeTest;
+import android.support.test.rule.ActivityTestRule;
+import android.support.test.runner.AndroidJUnit4;
+
+import org.junit.Rule;
+import org.junit.Test;
+import org.junit.runner.RunWith;
+
+
+import static android.support.test.espresso.Espresso.onView;
+import static android.support.test.espresso.assertion.ViewAssertions.matches;
+import static android.support.test.espresso.matcher.ViewMatchers.withId;
+import static android.support.test.espresso.matcher.ViewMatchers.withText;
+
+@RunWith(AndroidJUnit4.class)
+@LargeTest
+public class MainActivityTest {
+  @Rule
+  public ActivityTestRule<MainActivity> activityRule = new ActivityTestRule<>(MainActivity.class);
+
+  @Test
+  public void textViewsHaveProperText() {
+    onView(withId(R.id.questionTextView))
+        .check(matches(withText("Q:\r\nHow does it work?")));
+    onView(withId(R.id.answerTextView))
+        .check(matches(withText("A:\r\nIt's magic! ¯\\_(ツ)_/¯")));
+  }
+}

sample/src/test/java/io/michaelrocks/paranoid/sample/SampleTest.java

@@ -0,0 +1,29 @@
+/*
+ * Copyright 2018 Michael Rozumyanskiy
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package io.michaelrocks.paranoid.sample;
+
+import org.junit.Test;
+
+
+import static org.junit.Assert.assertTrue;
+
+public class SampleTest {
+  @Test
+  public void runsJustFine() {
+    assertTrue(true);
+  }
+}