fix: close App not responding dialog to reduce test flakiness

AnkiDroid/build.gradle

@@ -398,6 +398,7 @@ dependencies {
     androidTestImplementation "androidx.test:core:$androidx_test_version"
     androidTestImplementation "androidx.test.ext:junit:$androidx_test_junit_version"
     androidTestImplementation "androidx.test:rules:$androidx_test_version"
+    androidTestImplementation "androidx.test.uiautomator:uiautomator:$uiautomator_version"
     androidTestImplementation "org.jetbrains.kotlin:kotlin-test:$kotlin_version"
     androidTestImplementation "org.jetbrains.kotlin:kotlin-test-junit:$kotlin_version"
     androidTestImplementation("androidx.fragment:fragment-testing:$fragments_version")

AnkiDroid/src/androidTest/java/com/ichi2/anki/tests/InstrumentedTest.kt

@@ -20,6 +20,8 @@ package com.ichi2.anki.tests
 import android.content.Context
 import android.os.Build
 import androidx.test.platform.app.InstrumentationRegistry
+import androidx.test.uiautomator.UiDevice
+import androidx.test.uiautomator.UiSelector
 import com.ichi2.anki.CollectionHelper
 import com.ichi2.anki.utils.EnsureAllFilesAccessRule
 import com.ichi2.annotations.DuplicatedCode
@@ -27,6 +29,7 @@ import com.ichi2.libanki.Card
 import com.ichi2.libanki.Collection
 import com.ichi2.libanki.Consts
 import com.ichi2.libanki.Note
+import org.junit.Before
 import org.junit.Rule
 import java.io.File
 import java.io.IOException
@@ -80,6 +83,25 @@ abstract class InstrumentedTest {
         }
     }
 
+    @Before
+    fun runBeforeEachTest() {
+        closeAndroidNotRespondingDialog()
+    }
+
+    // Instrumented tests can fail if there's a "App not responding"
+    // System dialog blocking our test from proceeding
+    //
+    // See: https://stackoverflow.com/questions/39457305/android-testing-waited-for-the-root-of-the-view-hierarchy-to-have-window-focus/54203607#54203607
+    private fun closeAndroidNotRespondingDialog() {
+        val device = UiDevice.getInstance(InstrumentationRegistry.getInstrumentation())
+        var waitButton = device.findObject(UiSelector().textContains("Wait"))
+        // There may be multiple dialogs
+        while (waitButton.exists()) {
+            waitButton.click()
+            waitButton = device.findObject(UiSelector().textContains("Wait"))
+        }
+    }
+
     @DuplicatedCode("This is copied from RobolectricTest. This will be refactored into a shared library later")
     protected fun Card.moveToReviewQueue() {
         this.queue = Consts.QUEUE_TYPE_REV

build.gradle

@@ -20,6 +20,7 @@ buildscript {
     ext.robolectric_version = '4.11.1'
     ext.android_gradle_plugin = "8.1.4"
     ext.dokka_version = "1.9.10" // not the same with kotlin version!
+    ext.uiautomator_version = "2.3.0-alpha05"
 
     configurations.configureEach {
         resolutionStrategy.eachDependency { details ->