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/*
* Copyright 2017 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package androidx.recyclerview.selection;
import static org.junit.Assert.assertFalse;
import static org.junit.Assert.assertTrue;
import android.support.test.filters.SmallTest;
import android.support.test.runner.AndroidJUnit4;
import android.view.MotionEvent;
import androidx.recyclerview.selection.testing.SelectionProbe;
import androidx.recyclerview.selection.testing.SelectionTrackers;
import androidx.recyclerview.selection.testing.TestAutoScroller;
import androidx.recyclerview.selection.testing.TestEvents;
import androidx.recyclerview.widget.RecyclerView;
import org.junit.Before;
import org.junit.Test;
import org.junit.runner.RunWith;
@RunWith(AndroidJUnit4.class)
@SmallTest
public class GestureSelectionHelperTest {
private static final MotionEvent DOWN = TestEvents.builder()
.action(MotionEvent.ACTION_DOWN)
.location(1, 1)
.build();
private static final MotionEvent MOVE = TestEvents.builder()
.action(MotionEvent.ACTION_MOVE)
.location(1, 1)
.build();
private static final MotionEvent UP = TestEvents.builder()
.action(MotionEvent.ACTION_UP)
.location(1, 1)
.build();
private GestureSelectionHelper mHelper;
private SelectionTracker<String> mSelectionTracker;
private SelectionProbe mSelection;
private OperationMonitor mMonitor;
private TestViewDelegate mView;
@Before
public void setUp() {
mSelectionTracker = SelectionTrackers.createStringTracker("gesture-selection-test", 100);
mSelection = new SelectionProbe(mSelectionTracker);
mMonitor = new OperationMonitor();
mView = new TestViewDelegate();
mHelper = new GestureSelectionHelper(
mSelectionTracker, mView, new TestAutoScroller(), mMonitor);
}
@Test
public void testIgnoresDownOnNoPosition() {
mView.mNextPosition = RecyclerView.NO_POSITION;
assertFalse(mHelper.onInterceptTouchEvent(null, DOWN));
}
@Test
public void testNoStartOnIllegalPosition() {
mView.mNextPosition = RecyclerView.NO_POSITION;
mHelper.onInterceptTouchEvent(null, DOWN);
mHelper.start();
assertFalse(mMonitor.isStarted());
}
@Test
public void testClaimsDownOnItem() {
mView.mNextPosition = 0;
assertTrue(mHelper.onInterceptTouchEvent(null, DOWN));
}
@Test
public void testClaimsMoveIfStarted() {
mView.mNextPosition = 0;
assertTrue(mHelper.onInterceptTouchEvent(null, DOWN));
// Normally, this is controller by the TouchSelectionHelper via a a long press gesture.
mSelectionTracker.select("1");
mSelectionTracker.anchorRange(1);
mHelper.start();
assertTrue(mHelper.onInterceptTouchEvent(null, MOVE));
}
@Test
public void testCreatesRangeSelection() {
mView.mNextPosition = 1;
mHelper.onInterceptTouchEvent(null, DOWN);
// Another way we are implicitly coupled to TouchInputHandler, is that we depend on
// long press to establish the initial anchor point. Without that we'll get an
// error when we try to extend the range.
mSelectionTracker.select("1");
mSelectionTracker.anchorRange(1);
mHelper.start();
mHelper.onTouchEvent(null, MOVE);
mView.mNextPosition = 9;
mHelper.onTouchEvent(null, MOVE);
mHelper.onTouchEvent(null, UP);
mSelection.assertRangeSelected(1, 9);
}
private static final class TestViewDelegate extends GestureSelectionHelper.ViewDelegate {
private int mNextPosition = RecyclerView.NO_POSITION;
@Override
int getHeight() {
return 1000;
}
@Override
int getItemUnder(MotionEvent e) {
return mNextPosition;
}
@Override
int getLastGlidedItemPosition(MotionEvent e) {
return mNextPosition;
}
}
}
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