AndroidOverlay implementation using Dialog.

content/public/android/junit/src/org/chromium/content/browser/androidoverlay/DialogOverlayCoreTest.java

+// Copyright 2017 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+package org.chromium.content.browser.androidoverlay;
+
+import static org.junit.Assert.assertEquals;
+import static org.junit.Assert.assertNotNull;
+import static org.junit.Assert.assertTrue;
+
+import android.app.Activity;
+import android.app.Dialog;
+import android.os.Binder;
+import android.os.IBinder;
+import android.view.Surface;
+import android.view.SurfaceHolder;
+
+// TODO(liberato): prior to M, this was ...policy.impl.PhoneWindow
+import com.android.internal.policy.PhoneWindow;
+
+import org.junit.Before;
+import org.junit.Test;
+import org.junit.runner.RunWith;
+import org.robolectric.Robolectric;
+import org.robolectric.Shadows;
+import org.robolectric.annotation.Config;
+import org.robolectric.annotation.Implementation;
+import org.robolectric.annotation.Implements;
+import org.robolectric.shadows.ShadowDialog;
+import org.robolectric.shadows.ShadowPhoneWindow;
+import org.robolectric.shadows.ShadowSurfaceView;
+
+import org.chromium.testing.local.LocalRobolectricTestRunner;
+
+/**
+ * Tests for DialogOverlayCore.
+ */
+@RunWith(LocalRobolectricTestRunner.class)
+@Config(manifest = Config.NONE)
+public class DialogOverlayCoreTest {
+    private Activity mActivity;
+
+    org.chromium.gfx.mojom.Rect mRect = new org.chromium.gfx.mojom.Rect();
+
+    // DialogCore under test.
+    DialogOverlayCore mCore;
+
+    // The dialog that we've provided to |mCore|.
+    Dialog mDialog;
+
+    // Fake window token that we'll send to |mCore|.
+    IBinder mWindowToken = new Binder();
+
+    // Surface that will be provided by |mDialog|.
+    Surface mSurface = new Surface();
+
+    // SurfaceHolder that will be provided by |mDialog|.
+    SurfaceHolder mHolder = new MyFakeSurfaceHolder(mSurface);
+
+    /**
+     * Robolectric shadow for PhoneWindow.  This one keeps track of takeSurface() calls.
+     * TODO(liberato): the @Impl specifies 'minSdk=M' in the robolectric source.
+     */
+    @Implements(value = PhoneWindow.class, isInAndroidSdk = false)
+    public static class MyPhoneWindowShadow extends ShadowPhoneWindow {
+        public MyPhoneWindowShadow() {}
+
+        private SurfaceHolder.Callback2 mCallback;
+
+        @Implementation
+        public void takeSurface(SurfaceHolder.Callback2 callback) {
+            mCallback = callback;
+        }
+    }
+
+    /**
+     * The default fake surface holder doesn't let us provide a surface.
+     */
+    public static class MyFakeSurfaceHolder extends ShadowSurfaceView.FakeSurfaceHolder {
+        private Surface mSurface;
+
+        // @param surface The Surface that we'll provide via getSurface.
+        public MyFakeSurfaceHolder(Surface surface) {
+            mSurface = surface;
+        }
+
+        @Override
+        public Surface getSurface() {
+            return mSurface;
+        }
+    }
+
+    @Before
+    public void setUp() {
+        mActivity = Robolectric.buildActivity(Activity.class).setup().get();
+        mRect.x = 0;
+        mRect.y = 1;
+        mRect.width = 2;
+        mRect.height = 3;
+
+        mCore = new DialogOverlayCore();
+        mDialog = new Dialog(mActivity);
+        mCore.initialize(mDialog, mRect, mHost);
+
+        // Nothing should be called yet.
+        checkOverlayDidntCall();
+
+        // The dialog should not be shown yet.
+        checkDialogIsNotShown();
+    }
+
+    // Make sure that the overlay didn't provide us with a surface, or notify us that it was
+    // destroyed, or wait for cleanup.
+    void checkOverlayDidntCall() {
+        assertEquals(null, mHost.surface());
+        assertEquals(0, mHost.destroyedCount());
+        assertEquals(0, mHost.cleanupCount());
+    }
+
+    // Return the SurfaceHolder callback that was provided to takeSurface(), if any.
+    SurfaceHolder.Callback2 holderCallback() {
+        return ((MyPhoneWindowShadow) Shadows.shadowOf(mDialog.getWindow())).mCallback;
+    }
+
+    /**
+     * Host impl that counts calls to it.
+     */
+    class HostMock implements DialogOverlayCore.Host {
+        private Surface mSurface;
+        private int mDestroyedCount;
+        private int mCleanupCount;
+
+        @Override
+        public void onSurfaceReady(Surface surface) {
+            mSurface = surface;
+        }
+
+        @Override
+        public void onOverlayDestroyed() {
+            mDestroyedCount++;
+        }
+
+        @Override
+        public void waitForCleanup() {
+            mCleanupCount++;
+        }
+
+        public Surface surface() {
+            return mSurface;
+        }
+
+        public int destroyedCount() {
+            return mDestroyedCount;
+        }
+
+        public int cleanupCount() {
+            return mCleanupCount;
+        }
+    };
+
+    HostMock mHost = new HostMock();
+
+    // Send a window token and provide the surface, so that the overlay is ready for use.
+    void sendTokenAndSurface() {
+        mCore.onWindowToken(mWindowToken);
+        // Make sure that somebody called takeSurface.
+        assertNotNull(holderCallback());
+
+        checkDialogIsShown();
+
+        // Provide the Android Surface.
+        holderCallback().surfaceCreated(mHolder);
+
+        // The host should have been told about the surface.
+        assertEquals(mSurface, mHost.surface());
+    }
+
+    // Verify that the dialog has been shown.
+    void checkDialogIsShown() {
+        assertEquals(mDialog, ShadowDialog.getShownDialogs().get(0));
+    }
+
+    // Verify that the dialog is not currently shown.  Note that dismiss() doesn't remove it from
+    // the shown dialog list in Robolectric, so we check for "was never shown or was dismissed".
+    void checkDialogIsNotShown() {
+        assertTrue(ShadowDialog.getShownDialogs().size() == 0
+                || Shadows.shadowOf(mDialog).hasBeenDismissed());
+    }
+
+    // Verify that |mCore| signaled that the overlay was lost to|mHost|.
+    void checkOverlayWasDestroyed() {
+        // |mCore| should have notified the host that it has been destroyed, and also waited for
+        // the host to signal that the client released it.
+        assertEquals(1, mHost.destroyedCount());
+        checkDialogIsNotShown();
+    }
+
+    // Check that releasing an overlay before getting a window token works.
+    @Test
+    @Config(shadows = {MyPhoneWindowShadow.class})
+    public void testReleaseImmediately() {
+        // Release the overlay.  |mCore| shouldn't notify us, since we released it.
+        mCore.release();
+        checkOverlayDidntCall();
+        checkDialogIsNotShown();
+    }
+
+    // Create a dialog, then send it a token.  Verify that it's shown.
+    @Test
+    @Config(shadows = {MyPhoneWindowShadow.class})
+    public void testTokenThenRelease() {
+        mCore.onWindowToken(mWindowToken);
+        checkDialogIsShown();
+
+        // Release the surface.  |mHost| shouldn't be notified, nor should it wait for cleanup.
+        // Note: it might be okay if it checks for cleanup, since cleanup would be complete after
+        // we call release().  However, it's not needed, so we enforce that it isn't.
+        mCore.release();
+        checkOverlayDidntCall();
+        checkDialogIsNotShown();
+    }
+
+    // Create a dialog, send a token, send a surface, then release it.
+    @Test
+    @Config(shadows = {MyPhoneWindowShadow.class})
+    public void testSurfaceThenRelease() {
+        sendTokenAndSurface();
+
+        mCore.release();
+        assertEquals(0, mHost.destroyedCount());
+        assertEquals(0, mHost.cleanupCount());
+        checkDialogIsNotShown();
+    }
+
+    // Create a dialog, send a surface, then destroy the surface.
+    @Test
+    @Config(shadows = {MyPhoneWindowShadow.class})
+    public void testSurfaceThenDestroy() {
+        sendTokenAndSurface();
+
+        // Destroy the surface.
+        holderCallback().surfaceDestroyed(mHolder);
+        // |mCore| should have waited for cleanup during surfaceDestroyed.
+        assertEquals(1, mHost.cleanupCount());
+        // Since we waited for cleanup, also pretend that the release was posted during the wait and
+        // will arrive after the wait completes.
+        mCore.release();
+
+        checkOverlayWasDestroyed();
+    }
+
+    // Test that we're notified when the window token changes.
+    @Test
+    @Config(shadows = {MyPhoneWindowShadow.class})
+    public void testChangeWindowToken() {
+        sendTokenAndSurface();
+
+        // Change the window token.
+        mCore.onWindowToken(new Binder());
+
+        checkOverlayWasDestroyed();
+    }
+
+    // Test that we're notified when the window token is lost.
+    @Test
+    @Config(shadows = {MyPhoneWindowShadow.class})
+    public void testLoseWindowToken() {
+        sendTokenAndSurface();
+
+        // Remove the window token.
+        mCore.onWindowToken(null);
+
+        checkOverlayWasDestroyed();
+    }
+}