1 files changed, 102 insertions, 0 deletions
diff --git a/app/src/androidTest/java/de/test/antennapod/EspressoTestUtils.java b/app/src/androidTest/java/de/test/antennapod/EspressoTestUtils.java
new file mode 100644
index 000000000..50109c71a
--- /dev/null
+++ b/app/src/androidTest/java/de/test/antennapod/EspressoTestUtils.java
@@ -0,0 +1,102 @@
+package de.test.antennapod;
+
+import android.content.Context;
+import android.support.annotation.StringRes;
+import android.support.test.InstrumentationRegistry;
+import android.support.test.espresso.PerformException;
+import android.support.test.espresso.UiController;
+import android.support.test.espresso.ViewAction;
+import android.support.test.espresso.contrib.DrawerActions;
+import android.support.test.espresso.contrib.RecyclerViewActions;
+import android.support.test.espresso.util.HumanReadables;
+import android.support.test.espresso.util.TreeIterables;
+import android.view.View;
+import de.danoeh.antennapod.R;
+import org.hamcrest.Matcher;
+
+import java.io.File;
+import java.util.concurrent.TimeoutException;
+
+import static android.support.test.espresso.Espresso.onView;
+import static android.support.test.espresso.action.ViewActions.click;
+import static android.support.test.espresso.matcher.ViewMatchers.hasDescendant;
+import static android.support.test.espresso.matcher.ViewMatchers.isRoot;
+import static android.support.test.espresso.matcher.ViewMatchers.withId;
+import static android.support.test.espresso.matcher.ViewMatchers.withText;
+
+public class EspressoTestUtils {
+    /**
+     * Perform action of waiting for a specific view id.
+     * https://stackoverflow.com/a/49814995/
+     * @param viewMatcher The view to wait for.
+     * @param millis The timeout of until when to wait for.
+     */
+    public static ViewAction waitForView(final Matcher<View> viewMatcher, final long millis) {
+        return new ViewAction() {
+            @Override
+            public Matcher<View> getConstraints() {
+                return isRoot();
+            }
+
+            @Override
+            public String getDescription() {
+                return "wait for a specific view for" + millis + " millis.";
+            }
+
+            @Override
+            public void perform(final UiController uiController, final View view) {
+                uiController.loopMainThreadUntilIdle();
+                final long startTime = System.currentTimeMillis();
+                final long endTime = startTime + millis;
+
+                do {
+                    for (View child : TreeIterables.breadthFirstViewTraversal(view)) {
+                        // found view with required ID
+                        if (viewMatcher.matches(child)) {
+                            return;
+                        }
+                    }
+
+                    uiController.loopMainThreadForAtLeast(50);
+                }
+                while (System.currentTimeMillis() < endTime);
+
+                // timeout happens
+                throw new PerformException.Builder()
+                        .withActionDescription(this.getDescription())
+                        .withViewDescription(HumanReadables.describe(view))
+                        .withCause(new TimeoutException())
+                        .build();
+            }
+        };
+    }
+
+    /**
+     * Clear all app databases
+     */
+    public static void clearAppData() {
+        File root = InstrumentationRegistry.getTargetContext().getFilesDir().getParentFile();
+        String[] sharedPreferencesFileNames = new File(root, "shared_prefs").list();
+        for (String fileName : sharedPreferencesFileNames) {
+            System.out.println("Cleared database: " + fileName);
+            InstrumentationRegistry.getTargetContext().
+                    getSharedPreferences(fileName.replace(".xml", ""), Context.MODE_PRIVATE).edit().clear().commit();
+        }
+    }
+
+    public static void clickPreference(@StringRes int title) {
+        onView(withId(R.id.list)).perform(
+                RecyclerViewActions.actionOnItem(hasDescendant(withText(title)),
+                        click()));
+    }
+
+    public static void openNavDrawer() {
+        onView(isRoot()).perform(waitForView(withId(R.id.drawer_layout), 1000));
+        onView(withId(R.id.drawer_layout)).perform(DrawerActions.open());
+    }
+
+    public static void closeNavDrawer() {
+        onView(isRoot()).perform(waitForView(withId(R.id.drawer_layout), 1000));
+        onView(withId(R.id.drawer_layout)).perform(DrawerActions.close());
+    }
+}