Test the Game fragment via instrumented tests

Author: alexandregressier

app/build.gradle.kts

@@ -33,6 +33,10 @@ android {
     kotlinOptions {
         jvmTarget = "1.8"
     }
+    packagingOptions {
+        exclude("META-INF/AL2.0")
+        exclude("META-INF/LGPL2.1")
+    }
 }
 
 dependencies {
@@ -74,4 +78,5 @@ dependencies {
     androidTestImplementation("androidx.arch.core:core-testing:_") // InstantTaskExecutorRule
     androidTestImplementation("androidx.test.espresso:espresso-core:_")
     androidTestImplementation("androidx.test.ext:junit-ktx:_") // activityScenarioRule
+    androidTestImplementation("org.jetbrains.kotlinx:kotlinx-coroutines-test:_") // runBlockingTest
 }

app/src/androidTest/java/dev/gressier/pennydrop/Matchers.kt

@@ -0,0 +1,15 @@
+package dev.gressier.pennydrop
+
+import android.view.View
+import org.hamcrest.Description
+import org.hamcrest.TypeSafeMatcher
+
+fun isActivated() = object : TypeSafeMatcher<View>() {
+
+    override fun describeTo(description: Description?) {
+        description?.appendText("The View is activated")
+    }
+
+    override fun matchesSafely(view: View?): Boolean =
+        view?.isActivated == true
+}

app/src/androidTest/java/dev/gressier/pennydrop/TestHelpers.kt

@@ -1,10 +1,15 @@
 package dev.gressier.pennydrop
 
+import androidx.navigation.findNavController
+import androidx.test.core.app.ActivityScenario
+import androidx.test.espresso.Espresso.closeSoftKeyboard
 import androidx.test.espresso.Espresso.onView
 import androidx.test.espresso.action.ViewActions.click
 import androidx.test.espresso.action.ViewActions.typeText
 import androidx.test.espresso.matcher.ViewMatchers.withId
 import androidx.test.espresso.matcher.ViewMatchers.withParent
+import kotlinx.coroutines.ExperimentalCoroutinesApi
+import kotlinx.coroutines.test.runBlockingTest
 import org.hamcrest.Matchers.allOf
 
 fun typeInPlayerName(parentId: Int, text: String) {
@@ -23,4 +28,18 @@ fun clickPlayerCheckbox(parentId: Int) {
             withParent(withId(parentId))
         )
     ).perform(click())
-}
+}
+
+@ExperimentalCoroutinesApi
+fun startSampleGame(scenario: ActivityScenario<MainActivity>) =
+    runBlockingTest {
+        scenario.onActivity { activity ->
+            activity.findNavController(R.id.containerFragment).navigate(R.id.pickPlayersFragment)
+        }
+        typeInPlayerName(R.id.mainPlayer, "Alex")
+        typeInPlayerName(R.id.player2, "Sofiane")
+        clickPlayerCheckbox(R.id.player3)
+        typeInPlayerName(R.id.player3, "Adrien")
+        closeSoftKeyboard()
+        onView(withId(R.id.buttonPlayGame)).perform(click())
+    }

app/src/androidTest/java/dev/gressier/pennydrop/fragments/GameFragmentTest.kt

@@ -0,0 +1,74 @@
+package dev.gressier.pennydrop.fragments
+
+import androidx.test.espresso.Espresso.onView
+import androidx.test.espresso.action.ViewActions.click
+import androidx.test.espresso.assertion.PositionAssertions.isCompletelyBelow
+import androidx.test.espresso.assertion.ViewAssertions.matches
+import androidx.test.espresso.matcher.ViewMatchers.*
+import androidx.test.ext.junit.rules.activityScenarioRule
+import dev.gressier.pennydrop.MainActivity
+import dev.gressier.pennydrop.R
+import dev.gressier.pennydrop.startSampleGame
+import kotlinx.coroutines.ExperimentalCoroutinesApi
+import kotlinx.coroutines.test.runBlockingTest
+import org.hamcrest.Matchers.*
+import org.junit.Assert.assertNotNull
+import org.junit.Assert.assertNull
+import org.junit.Before
+import org.junit.Rule
+import org.junit.Test
+import dev.gressier.pennydrop.isActivated as isLastRolled
+
+@ExperimentalCoroutinesApi
+class GameFragmentTest {
+
+    @get:Rule var activityScenarioRule = activityScenarioRule<MainActivity>()
+
+    private val coinSlotMap = listOf(
+        R.id.coinSlot1, R.id.coinSlot2, R.id.coinSlot3, R.id.coinSlot4, R.id.coinSlot5, R.id.coinSlot6,
+    )
+        .mapIndexed { i, it -> "${i + 1}" to it }
+        .toMap()
+
+    @Before fun startNewGame() =
+        runBlockingTest {
+            startSampleGame(activityScenarioRule.scenario)
+        }
+
+    @Test fun Check_starting_slots() {
+        coinSlotMap.forEach { slotNumber, slotId ->
+            onView(
+                allOf(withId(R.id.slotNumberCoinSlot), withParent(withId(slotId)))
+            ).check(matches(withText(slotNumber)))
+
+            onView(
+                allOf(withId(R.id.coinImageCoinSlot), withParent(withId(slotId)))
+            ).check(matches(not(isDisplayed())))
+
+            if (slotId != R.id.coinSlot6)
+                onView(withId(R.id.coinSlot6)).check(isCompletelyBelow(withId(slotId)))
+        }
+    }
+
+    @Test fun Check_single_roll_result() =
+        runBlockingTest {
+            onView(withId(R.id.rollButton)).perform(click())
+
+            onView(withId(R.id.textCurrentPlayerName)).check(matches(withText("Alex")))
+            onView(withId(R.id.textCurrentPlayerCoinsLeft)).check(matches(withText("9")))
+
+            onView(
+                allOf(
+                    withId(R.id.bottomViewCoinSlot),
+                    isLastRolled(),
+                    anyOf(
+                        hasSibling(allOf(withId(R.id.coinImageCoinSlot), isDisplayed())),
+                        hasSibling(allOf(withId(R.id.slotNumberCoinSlot), withText("6"))),
+                    ),
+                )
+            ).check { view, noViewFoundException ->
+                assertNull(noViewFoundException)
+                assertNotNull(view)
+            }
+        }
+}

app/src/main/res/layout/fragment_game.xml

@@ -124,6 +124,7 @@
             app:layout_constraintEnd_toEndOf="parent">
 
             <Button
+                android:id="@+id/rollButton"
                 android:layout_width="0dp"
                 android:layout_height="wrap_content"
                 android:layout_weight="3"
@@ -145,6 +146,7 @@
                 android:textSize="24sp" />
 
             <Button
+                android:id="@+id/passButton"
                 android:layout_width="0dp"
                 android:layout_height="wrap_content"
                 android:layout_weight="3"

versions.properties

@@ -169,3 +169,5 @@ version.kotlin=1.5.10
 ## # available=1.5.30-M1
 ## # available=1.5.30-RC
 ## # available=1.5.30
+
+version.kotlinx.coroutines=1.5.2