[Home] Add lifecycle events and some tests

chrome/android/javatests/src/org/chromium/chrome/browser/widget/BottomSheetObserverTest.java

Index: chrome/android/javatests/src/org/chromium/chrome/browser/widget/BottomSheetObserverTest.java
diff --git a/chrome/android/javatests/src/org/chromium/chrome/browser/widget/BottomSheetObserverTest.java b/chrome/android/javatests/src/org/chromium/chrome/browser/widget/BottomSheetObserverTest.java
new file mode 100644
index 0000000000000000000000000000000000000000..5ac72125bde6926dd57b7a85c7b84b633e1bc78c
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+++ b/chrome/android/javatests/src/org/chromium/chrome/browser/widget/BottomSheetObserverTest.java
@@ -0,0 +1,200 @@
+// 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.chrome.browser.widget;
+
+import android.support.test.filters.MediumTest;
+
+import org.chromium.base.test.util.CallbackHelper;
+import org.chromium.chrome.browser.util.MathUtils;
+import org.chromium.chrome.test.BottomSheetTestCaseBase;
+
+import java.util.concurrent.TimeoutException;
+
+/** This class tests the functionality of the {@link BottomSheetObserver}. */
+public class BottomSheetObserverTest extends BottomSheetTestCaseBase {
+    /** A handle to the sheet's observer. */
+    private TestBottomSheetObserver mObserver;
+
+    /** An observer used to record events that occur with respect to the bottom sheet. */
+    private static class TestBottomSheetObserver implements BottomSheetObserver {
+        /** A {@link CallbackHelper} that can wait for the bottom sheet to be closed. */
+        private final CallbackHelper mClosedCallbackHelper = new CallbackHelper();
+
+        /** A {@link CallbackHelper} that can wait for the bottom sheet to be opened. */
+        private final CallbackHelper mOpenedCallbackHelper = new CallbackHelper();
+
+        /** A {@link CallbackHelper} that can wait for the onTransitionPeekToHalf event. */
+        private final CallbackHelper mPeekToHalfCallbackHelper = new CallbackHelper();
+
+        /** The last value that the onTransitionPeekToHalf event sent. */
+        private float mLastPeekToHalfValue;
+
+        @Override
+        public void onTransitionPeekToHalf(float fraction) {
+            mLastPeekToHalfValue = fraction;
+            mPeekToHalfCallbackHelper.notifyCalled();
+        }
+
+        @Override
+        public void onSheetOpened() {
+            mOpenedCallbackHelper.notifyCalled();
+        }
+
+        @Override
+        public void onSheetClosed() {
+            mClosedCallbackHelper.notifyCalled();
+        }
+
+        @Override
+        public void onLoadUrl(String url) {}
+
+        public CallbackHelper getClosedCallbackHelper() {
+            return mClosedCallbackHelper;
+        }
+
+        public CallbackHelper getOpenedCallbackHelper() {
+            return mOpenedCallbackHelper;
+        }
+
+        public CallbackHelper getPeekToHalfCallbackHelper() {
+            return mPeekToHalfCallbackHelper;
+        }
+
+        public float getLastPeekToHalfValue() {
+            return mLastPeekToHalfValue;
+        }
+    }
+
+    @Override
+    protected void setUp() throws Exception {
+        super.setUp();
+
+        mObserver = new TestBottomSheetObserver();
+        mBottomSheet.addObserver(mObserver);
+    }
+
+    /**
+     * Test that the onSheetClosed event is triggered if the sheet is closed without animation.
+     */
+    @MediumTest
+    public void testCloseEventCalledNoAnimation() throws InterruptedException, TimeoutException {
+        setSheetState(BottomSheet.SHEET_STATE_FULL, false);
+
+        CallbackHelper closedCallbackHelper = mObserver.getClosedCallbackHelper();
+
+        int initialOpenedCount = mObserver.getOpenedCallbackHelper().getCallCount();
+
+        int closedCallbackCount = closedCallbackHelper.getCallCount();
+        setSheetState(BottomSheet.SHEET_STATE_PEEK, false);
+        closedCallbackHelper.waitForCallback(closedCallbackCount, 1);
+
+        assertEquals(initialOpenedCount, mObserver.getOpenedCallbackHelper().getCallCount());
+    }
+
+    /**
+     * Test that the onSheetClosed event is triggered if the sheet is closed with animation.
+     */
+    @MediumTest
+    public void testCloseEventCalledWithAnimation() throws InterruptedException, TimeoutException {
+        setSheetState(BottomSheet.SHEET_STATE_FULL, false);
+
+        CallbackHelper closedCallbackHelper = mObserver.getClosedCallbackHelper();
+
+        int initialOpenedCount = mObserver.getOpenedCallbackHelper().getCallCount();
+
+        int closedCallbackCount = closedCallbackHelper.getCallCount();
+        setSheetState(BottomSheet.SHEET_STATE_PEEK, true);
+        closedCallbackHelper.waitForCallback(closedCallbackCount, 1);
+
+        assertEquals(initialOpenedCount, mObserver.getOpenedCallbackHelper().getCallCount());
+    }
+
+    /**
+     * Test that the onSheetOpened event is triggered if the sheet is opened without animation.
+     */
+    @MediumTest
+    public void testOpenedEventCalledNoAnimation() throws InterruptedException, TimeoutException {
+        setSheetState(BottomSheet.SHEET_STATE_PEEK, false);
+
+        CallbackHelper openedCallbackHelper = mObserver.getOpenedCallbackHelper();
+
+        int initialClosedCount = mObserver.getClosedCallbackHelper().getCallCount();
+
+        int openedCallbackCount = openedCallbackHelper.getCallCount();
+        setSheetState(BottomSheet.SHEET_STATE_FULL, false);
+        openedCallbackHelper.waitForCallback(openedCallbackCount, 1);
+
+        assertEquals(initialClosedCount, mObserver.getClosedCallbackHelper().getCallCount());
+    }
+
+    /**
+     * Test that the onSheetOpened event is triggered if the sheet is opened with animation.
+     */
+    @MediumTest
+    public void testOpenedEventCalledWithAnimation() throws InterruptedException, TimeoutException {
+        setSheetState(BottomSheet.SHEET_STATE_PEEK, false);
+
+        CallbackHelper openedCallbackHelper = mObserver.getOpenedCallbackHelper();
+
+        int initialClosedCount = mObserver.getClosedCallbackHelper().getCallCount();
+
+        int openedCallbackCount = openedCallbackHelper.getCallCount();
+        setSheetState(BottomSheet.SHEET_STATE_FULL, true);
+        openedCallbackHelper.waitForCallback(openedCallbackCount, 1);
+
+        assertEquals(initialClosedCount, mObserver.getClosedCallbackHelper().getCallCount());
+    }
+
+    /**
+     * Test the onTransitionPeekToHalf event.
+     */
+    @MediumTest
+    public void testPeekToHalfTransition() throws InterruptedException, TimeoutException {
+        CallbackHelper callbackHelper = mObserver.getPeekToHalfCallbackHelper();
+
+        float peekHeight = mBottomSheet.getPeekRatio() * mBottomSheet.getSheetContainerHeight();
+        float halfHeight = mBottomSheet.getHalfRatio() * mBottomSheet.getSheetContainerHeight();
+        float fullHeight = mBottomSheet.getFullRatio() * mBottomSheet.getSheetContainerHeight();
+
+        float midPeekHalf = (peekHeight + halfHeight) / 2f;
+        float midHalfFull = (halfHeight + fullHeight) / 2f;
+
+        // When in the peeking state, the transition value should be 0.
+        int callbackCount = callbackHelper.getCallCount();
+        setSheetOffsetFromBottom(peekHeight);
+        callbackHelper.waitForCallback(callbackCount, 1);
+        assertEquals(0f, mObserver.getLastPeekToHalfValue(), MathUtils.EPSILON);
+
+        // When in between peek and half states, the transition value should be 0.5.
+        callbackCount = callbackHelper.getCallCount();
+        setSheetOffsetFromBottom(midPeekHalf);
+        callbackHelper.waitForCallback(callbackCount, 1);
+        assertEquals(0.5f, mObserver.getLastPeekToHalfValue(), MathUtils.EPSILON);
+
+        // After jumping to the full state (skipping the half state), the event should have
+        // triggered once more with a max value of 1.
+        callbackCount = callbackHelper.getCallCount();
+        setSheetOffsetFromBottom(fullHeight);
+        callbackHelper.waitForCallback(callbackCount, 1);
+        assertEquals(1f, mObserver.getLastPeekToHalfValue(), MathUtils.EPSILON);
+
+        // Moving from full to somewhere between half and full should not trigger the event.
+        callbackCount = callbackHelper.getCallCount();
+        setSheetOffsetFromBottom(midHalfFull);
+        assertEquals(callbackCount, callbackHelper.getCallCount());
+
+        // Reset the sheet to be between peek and half states.
+        callbackCount = callbackHelper.getCallCount();
+        setSheetOffsetFromBottom(midPeekHalf);
+        callbackHelper.waitForCallback(callbackCount, 1);
+        assertEquals(0.5f, mObserver.getLastPeekToHalfValue(), MathUtils.EPSILON);
+
+        // At the half state the event should send 1.
+        callbackCount = callbackHelper.getCallCount();
+        setSheetOffsetFromBottom(halfHeight);
+        callbackHelper.waitForCallback(callbackCount, 1);
+        assertEquals(1f, mObserver.getLastPeekToHalfValue(), MathUtils.EPSILON);
+    }
+}