Write Unit tests for the SDK

app/build.gradle

@@ -46,6 +46,7 @@ dependencies {
     testImplementation 'junit:junit:4.12'
     androidTestImplementation 'androidx.test.ext:junit:1.1.0'
     androidTestImplementation 'androidx.test.espresso:espresso-core:3.1.1'
+    androidTestImplementation 'androidx.test:rules:1.2.0-beta01'
 
     //Buffup SDK
     implementation project(':buffup')
@@ -57,5 +58,4 @@ dependencies {
     //Exoplayer
     implementation "com.google.android.exoplayer:exoplayer-core:$rootProject.exoplayer_version"
     implementation "com.google.android.exoplayer:exoplayer-ui:$rootProject.exoplayer_version"
-    androidTestImplementation 'androidx.test:rules:1.2.0-beta01'
 }

app/src/androidTest/java/com/emmanuelkehinde/buffdemo/ui/stream_player/StreamPlayerActivityTest.kt

@@ -12,6 +12,9 @@ import org.junit.Rule
 import org.junit.Test
 import org.junit.runner.RunWith
 
+/**
+ * Created by Emmanuel Kehinde on 2020-03-31.
+ */
 
 @LargeTest
 @RunWith(AndroidJUnit4::class)

app/src/test/java/com/emmanuelkehinde/buffdemo/StreamPlayerViewModelTest.kt

@@ -30,7 +30,7 @@ class StreamPlayerViewModelTest {
 
     @Before
     fun setUp() {
-        streamPlayerViewModel = StreamPlayerViewModel() //
+        streamPlayerViewModel = StreamPlayerViewModel()
     }
 
     @Test

buffup/build.gradle

@@ -31,9 +31,14 @@ dependencies {
     implementation "org.jetbrains.kotlin:kotlin-stdlib-jdk7:$kotlin_version"
     implementation 'androidx.appcompat:appcompat:1.1.0'
     implementation 'androidx.core:core-ktx:1.2.0'
+
+    // Testing
+    testImplementation 'org.mockito:mockito-core:2.19.0'
+    testImplementation  'androidx.arch.core:core-testing:2.1.0'
     testImplementation 'junit:junit:4.12'
     androidTestImplementation 'androidx.test.ext:junit:1.1.0'
-    androidTestImplementation 'androidx.test.espresso:espresso-core:3.1.1'
+    androidTestImplementation 'androidx.test:rules:1.2.0-beta01'
+    testImplementation 'org.jetbrains.kotlinx:kotlinx-coroutines-test:1.3.4'
 
     //MotionLayout support
     implementation 'androidx.constraintlayout:constraintlayout:2.0.0-beta4'

buffup/src/main/java/com/emmanuelkehinde/buffup/model/Buff.kt

@@ -6,14 +6,14 @@ import com.google.gson.annotations.SerializedName
  * Created by Emmanuel Kehinde on 2020-03-27.
  */
 data class Buff(
-    val id: Long?,
-    val priority: Int,
-    val author: Author?,
-    val question: Question?,
-    val answers: List<Answer>?,
+    val id: Long? = null,
+    val priority: Int? = null,
+    val author: Author? = null,
+    val question: Question? = null,
+    val answers: List<Answer>? = null,
 
     @SerializedName("time_to_show")
-    val timeToShow: Int?
+    val timeToShow: Int? = null
 ) {
 
     data class Author(

buffup/src/test/java/com/emmanuelkehinde/buffup/BuffApiServiceTest.kt

@@ -0,0 +1,34 @@
+package com.emmanuelkehinde.buffup
+
+import com.emmanuelkehinde.buffup.remote.BuffApiService
+import com.emmanuelkehinde.buffup.remote.BuffResult
+import kotlinx.coroutines.Dispatchers
+import kotlinx.coroutines.runBlocking
+import kotlinx.coroutines.withContext
+import org.junit.Test
+import org.junit.runner.RunWith
+import org.junit.runners.JUnit4
+
+/**
+ * Created by Emmanuel Kehinde on 2020-03-31.
+ */
+@RunWith(JUnit4::class)
+class BuffApiServiceTest {
+
+    @Test
+    fun `fetchBuff returns Success response`() = runBlocking {
+        val result = withContext(Dispatchers.Default) {
+            BuffApiService.getBuff("1")
+        }
+        assert(result is BuffResult.Success)
+    }
+
+    @Test
+    fun `ensure buffId param falls between 1 to 5`() = runBlocking {
+        val result = withContext(Dispatchers.Default) {
+            BuffApiService.getBuff("6")
+        }
+        assert(result is BuffResult.Error)
+    }
+
+}

buffup/src/test/java/com/emmanuelkehinde/buffup/BuffViewTest.kt

@@ -0,0 +1,35 @@
+package com.emmanuelkehinde.buffup
+
+import android.app.Activity
+import com.emmanuelkehinde.buffup.exceptions.MissingInitializationException
+import com.emmanuelkehinde.buffup.view.BuffView
+import org.junit.Test
+import org.junit.runner.RunWith
+import org.mockito.Mock
+import org.mockito.junit.MockitoJUnitRunner
+
+/**
+ * Created by Emmanuel Kehinde on 2020-03-31.
+ */
+
+@RunWith(MockitoJUnitRunner::class)
+class BuffViewTest {
+
+    @Mock
+    lateinit var activity: Activity
+
+    @Mock
+    lateinit var buffView: BuffView
+
+    @Test
+    fun buffViewThrowsInitializationExceptionWhenStartIsCalled() {
+        try {
+            buffView.start(activity)
+        } catch (e: MissingInitializationException) {
+
+        } catch (e: NullPointerException) {
+
+        }
+    }
+
+}

buffup/src/test/resources/mockito-extensions/org.mockito.plugins.MockMaker

@@ -0,0 +1 @@
+mock-maker-inline