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      1 /*
      2  * Copyright (C) 2015 The Android Open Source Project
      3  *
      4  * Licensed under the Apache License, Version 2.0 (the "License");
      5  * you may not use this file except in compliance with the License.
      6  * You may obtain a copy of the License at
      7  *
      8  *      http://www.apache.org/licenses/LICENSE-2.0
      9  *
     10  * Unless required by applicable law or agreed to in writing, software
     11  * distributed under the License is distributed on an "AS IS" BASIS,
     12  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
     13  * See the License for the specific language governing permissions and
     14  * limitations under the License.
     15  */
     16 
     17 package com.android.documentsui.selection;
     18 
     19 import static org.junit.Assert.fail;
     20 
     21 import android.support.test.filters.SmallTest;
     22 import android.support.test.runner.AndroidJUnit4;
     23 
     24 import com.android.documentsui.selection.testing.SelectionPredicates;
     25 import com.android.documentsui.selection.testing.SelectionProbe;
     26 import com.android.documentsui.selection.testing.TestAdapter;
     27 import com.android.documentsui.selection.testing.TestSelectionObserver;
     28 import com.android.documentsui.selection.testing.TestStableIdProvider;
     29 
     30 import org.junit.Before;
     31 import org.junit.Test;
     32 import org.junit.runner.RunWith;
     33 
     34 import java.util.List;
     35 
     36 @RunWith(AndroidJUnit4.class)
     37 @SmallTest
     38 public class DefaultSelectionHelper_SingleSelectTest {
     39 
     40     private List<String> mItems;
     41     private SelectionHelper mHelper;
     42     private TestSelectionObserver mListener;
     43     private SelectionProbe mSelection;
     44 
     45     @Before
     46     public void setUp() throws Exception {
     47         mItems = TestAdapter.createItemList(100);
     48         mListener = new TestSelectionObserver();
     49         TestAdapter adapter = new TestAdapter();
     50         adapter.updateTestModelIds(mItems);
     51 
     52         mHelper = new DefaultSelectionHelper(
     53                 DefaultSelectionHelper.MODE_SINGLE,
     54                 adapter,
     55                 new TestStableIdProvider(adapter),
     56                 SelectionPredicates.CAN_SET_ANYTHING);
     57 
     58         mHelper.addObserver(mListener);
     59 
     60         mSelection = new SelectionProbe(mHelper);
     61     }
     62 
     63     @Test
     64     public void testSimpleSelect() {
     65         mHelper.select(mItems.get(3));
     66         mHelper.select(mItems.get(4));
     67         mListener.assertSelectionChanged();
     68         mSelection.assertSelection(4);
     69     }
     70 
     71     @Test
     72     public void testRangeSelectionNotEstablished() {
     73         mHelper.select(mItems.get(3));
     74         mListener.reset();
     75 
     76         try {
     77             mHelper.extendRange(10);
     78             fail("Should have thrown.");
     79         } catch (Exception expected) {}
     80 
     81         mListener.assertSelectionUnchanged();
     82         mSelection.assertSelection(3);
     83     }
     84 }
     85