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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 package android.support.v4.view;
     17 
     18 import static org.junit.Assert.assertEquals;
     19 import static org.junit.Assert.assertNotNull;
     20 import static org.junit.Assert.assertNull;
     21 
     22 import android.app.Activity;
     23 import android.support.compat.test.R;
     24 import android.support.test.filters.SmallTest;
     25 import android.support.test.runner.AndroidJUnit4;
     26 import android.support.v4.BaseInstrumentationTestCase;
     27 import android.view.Display;
     28 import android.view.View;
     29 
     30 import org.junit.Before;
     31 import org.junit.Test;
     32 import org.junit.runner.RunWith;
     33 
     34 
     35 @RunWith(AndroidJUnit4.class)
     36 @SmallTest
     37 public class ViewCompatTest extends BaseInstrumentationTestCase<ViewCompatActivity> {
     38 
     39     private View mView;
     40 
     41     public ViewCompatTest() {
     42         super(ViewCompatActivity.class);
     43     }
     44 
     45     @Before
     46     public void setUp() {
     47         final Activity activity = mActivityTestRule.getActivity();
     48         mView = activity.findViewById(R.id.view);
     49     }
     50 
     51     @Test
     52     public void testConstants() {
     53         // Compat constants must match core constants since they can be used interchangeably
     54         // in various support lib calls.
     55         assertEquals("LTR constants", View.LAYOUT_DIRECTION_LTR, ViewCompat.LAYOUT_DIRECTION_LTR);
     56         assertEquals("RTL constants", View.LAYOUT_DIRECTION_RTL, ViewCompat.LAYOUT_DIRECTION_RTL);
     57     }
     58 
     59     @Test
     60     public void testGetDisplay() {
     61         final Display display = ViewCompat.getDisplay(mView);
     62         assertNotNull(display);
     63     }
     64 
     65     @Test
     66     public void testGetDisplay_returnsNullForUnattachedView() {
     67         final View view = new View(mActivityTestRule.getActivity());
     68         final Display display = ViewCompat.getDisplay(view);
     69         assertNull(display);
     70     }
     71 
     72     @Test
     73     public void testTransitionName() {
     74         final View view = new View(mActivityTestRule.getActivity());
     75         ViewCompat.setTransitionName(view, "abc");
     76         assertEquals("abc", ViewCompat.getTransitionName(view));
     77     }
     78 
     79 }
     80