Add UI Tests using Espresso Testing Framework

app/build.gradle.kts

@@ -28,6 +28,8 @@ android {
         multiDexEnabled = true
 
         resourceConfigurations += listOf("ar", "bg", "bn", "bn-rIN", "bs", "cs", "da", "de", "el-rGR", "en", "eo", "es", "es-rAR", "fi", "fr", "he-rIL", "hi", "hr", "hu", "in-rID", "is", "it", "ja", "ko", "lt", "lv", "nb-rNO", "nl", "oc", "pl", "pt-rPT", "ro-rRO", "ru", "sk", "sl", "sv", "tr", "uk", "vi", "zh-rCN", "zh-rTW")
+        testInstrumentationRunner = "androidx.test.runner.AndroidJUnitRunner"
+        testInstrumentationRunnerArguments["clearPackageData"] = "true"
     }
 
     buildTypes {
@@ -94,6 +96,7 @@ dependencies {
     implementation("androidx.preference:preference:1.2.1")
     implementation("com.google.android.material:material:1.12.0")
     implementation("com.github.yalantis:ucrop:2.2.9")
+    implementation("androidx.tracing:tracing:1.2.0")
     coreLibraryDesugaring("com.android.tools:desugar_jdk_libs:2.0.4")
 
     // Splash Screen
@@ -113,6 +116,16 @@ dependencies {
     testImplementation("androidx.test:core:1.5.0")
     testImplementation("junit:junit:4.13.2")
     testImplementation("org.robolectric:robolectric:4.12.2")
+
+    // Espresso
+    androidTestImplementation("androidx.test.espresso:espresso-core:3.6.0-beta01")
+    androidTestImplementation("androidx.test:core:1.5.0")
+    androidTestImplementation("androidx.test:rules:1.6.0-beta01")
+    androidTestImplementation("androidx.test.ext:junit:1.2.0-beta01")
+    androidTestImplementation("androidx.test:runner:1.5.2")
+    androidTestImplementation("androidx.test.espresso:espresso-contrib:3.6.0-beta01")
+
+    androidTestUtil("androidx.test:orchestrator:1.1.0")
 }
 
 tasks.withType<SpotBugsTask>().configureEach {

app/src/androidTest/java/protect/card_locker/LanguageChangeUITest.java

@@ -0,0 +1,173 @@
+package protect.card_locker;
+
+
+import static androidx.test.espresso.Espresso.onData;
+import static androidx.test.espresso.Espresso.onView;
+import static androidx.test.espresso.action.ViewActions.click;
+import static androidx.test.espresso.assertion.ViewAssertions.matches;
+import static androidx.test.espresso.contrib.RecyclerViewActions.actionOnItemAtPosition;
+import static androidx.test.espresso.matcher.ViewMatchers.isDisplayed;
+import static androidx.test.espresso.matcher.ViewMatchers.withClassName;
+import static androidx.test.espresso.matcher.ViewMatchers.withContentDescription;
+import static androidx.test.espresso.matcher.ViewMatchers.withId;
+import static androidx.test.espresso.matcher.ViewMatchers.withParent;
+import static androidx.test.espresso.matcher.ViewMatchers.withText;
+import static androidx.test.platform.app.InstrumentationRegistry.getInstrumentation;
+import static org.hamcrest.Matchers.allOf;
+import static org.hamcrest.Matchers.anything;
+import static org.hamcrest.Matchers.is;
+
+import android.view.View;
+import android.view.ViewGroup;
+import android.view.ViewParent;
+
+import androidx.test.espresso.DataInteraction;
+import androidx.test.espresso.ViewInteraction;
+import androidx.test.ext.junit.rules.ActivityScenarioRule;
+import androidx.test.ext.junit.runners.AndroidJUnit4;
+import androidx.test.filters.LargeTest;
+
+import org.hamcrest.Description;
+import org.hamcrest.Matcher;
+import org.hamcrest.TypeSafeMatcher;
+import org.hamcrest.core.IsInstanceOf;
+import org.junit.Rule;
+import org.junit.Test;
+import org.junit.runner.RunWith;
+
+import java.util.Arrays;
+
+@LargeTest
+@RunWith(AndroidJUnit4.class)
+public class LanguageChangeUITest {
+
+    @Rule
+    public ActivityScenarioRule<MainActivity> mActivityScenarioRule =
+            new ActivityScenarioRule<>(MainActivity.class);
+
+    @Test
+    public void languageChangeUITest() {
+        ViewInteraction overflowMenuButton = onView(
+                allOf(withContentDescription(R.string.action_more_options),
+                        isDisplayed()));
+        overflowMenuButton.perform(click());
+
+        String expectedText = getInstrumentation().getTargetContext().getString(R.string.settings);
+        ViewInteraction materialTextView = onView(
+                allOf(withId(androidx.recyclerview.R.id.title), withText(expectedText),
+                        childAtPosition(
+                                childAtPosition(
+                                        withId(androidx.appcompat.R.id.content),
+                                        0),
+                                0),
+                        isDisplayed()));
+        materialTextView.perform(click());
+
+        ViewInteraction recyclerView = onView(
+                allOf(withId(com.jaredrummler.android.colorpicker.R.id.recycler_view),
+                        childAtPosition(
+                                withId(android.R.id.list_container),
+                                0)));
+        recyclerView.perform(actionOnItemAtPosition(4, click()));
+
+        String selectedLanguage = "de";
+        int position = getPositionOfItem(selectedLanguage);
+
+        DataInteraction appCompatCheckedTextView = onData(anything())
+                .inAdapterView(allOf(withId(androidx.appcompat.R.id.select_dialog_listview),
+                        childAtPosition(
+                                withId(androidx.appcompat.R.id.contentPanel),
+                                0)))
+                .atPosition(position);
+        appCompatCheckedTextView.perform(click());
+
+        ViewInteraction textView = onView(
+                allOf(withText("Einstellungen"),
+                        withParent(allOf(withId(R.id.toolbar),
+                                withParent(IsInstanceOf.<View>instanceOf(android.widget.LinearLayout.class)))),
+                        isDisplayed()));
+        textView.check(matches(withText("Einstellungen")));
+
+        ViewInteraction recyclerView2 = onView(
+                allOf(withId(com.jaredrummler.android.colorpicker.R.id.recycler_view),
+                        childAtPosition(
+                                withId(android.R.id.list_container),
+                                0)));
+        recyclerView2.perform(actionOnItemAtPosition(4, click()));
+
+        selectedLanguage = "el-rGR";
+        position = getPositionOfItem(selectedLanguage);
+
+        DataInteraction appCompatCheckedTextView2 = onData(anything())
+                .inAdapterView(allOf(withId(androidx.appcompat.R.id.select_dialog_listview),
+                        childAtPosition(
+                                withId(androidx.appcompat.R.id.contentPanel),
+                                0)))
+                .atPosition(position);
+        appCompatCheckedTextView2.perform(click());
+
+        ViewInteraction textView2 = onView(
+                allOf(withText("Ρυθμίσεις"),
+                        withParent(allOf(withId(R.id.toolbar),
+                                withParent(IsInstanceOf.<View>instanceOf(android.widget.LinearLayout.class)))),
+                        isDisplayed()));
+        textView2.check(matches(withText("Ρυθμίσεις")));
+
+        ViewInteraction recyclerView3 = onView(
+                allOf(withId(com.jaredrummler.android.colorpicker.R.id.recycler_view),
+                        childAtPosition(
+                                withId(android.R.id.list_container),
+                                0)));
+        recyclerView3.perform(actionOnItemAtPosition(4, click()));
+
+        DataInteraction appCompatCheckedTextView3 = onData(anything())
+                .inAdapterView(allOf(withId(androidx.appcompat.R.id.select_dialog_listview),
+                        childAtPosition(
+                                withId(androidx.appcompat.R.id.contentPanel),
+                                0)))
+                .atPosition(0);
+        appCompatCheckedTextView3.perform(click());
+
+        ViewInteraction appCompatImageButton = onView(
+                allOf(withContentDescription("Navigate up"),
+                        childAtPosition(
+                                allOf(withId(R.id.toolbar),
+                                        childAtPosition(
+                                                withClassName(is("com.google.android.material.appbar.AppBarLayout")),
+                                                0)),
+                                1),
+                        isDisplayed()));
+        appCompatImageButton.perform(click());
+
+        ViewInteraction textView3 = onView(
+                allOf(withId(R.id.welcome_text), withText("Welcome to Catima"),
+                        withParent(allOf(withId(R.id.helpSection),
+                                withParent(withId(R.id.include)))),
+                        isDisplayed()));
+        textView3.check(matches(withText("Welcome to Catima")));
+    }
+
+    private static Matcher<View> childAtPosition(
+            final Matcher<View> parentMatcher, final int position) {
+
+        return new TypeSafeMatcher<View>() {
+            @Override
+            public void describeTo(Description description) {
+                description.appendText("Child at position " + position + " in parent ");
+                parentMatcher.describeTo(description);
+            }
+
+            @Override
+            public boolean matchesSafely(View view) {
+                ViewParent parent = view.getParent();
+                return parent instanceof ViewGroup && parentMatcher.matches(parent)
+                        && view.equals(((ViewGroup) parent).getChildAt(position));
+            }
+        };
+    }
+
+    private static int getPositionOfItem(String selectedLanguage) {
+        String[] availableLocales = getInstrumentation().getTargetContext().getResources().getStringArray(R.array.locale_values);
+        return Arrays.asList(availableLocales).indexOf(selectedLanguage);
+    }
+}