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      1 /*
      2  * Copyright 2018 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 androidx.recyclerview.test;
     18 
     19 import static org.junit.Assert.assertEquals;
     20 import static org.junit.Assert.assertFalse;
     21 import static org.junit.Assert.assertNotNull;
     22 import static org.junit.Assert.assertTrue;
     23 
     24 import android.app.Activity;
     25 import android.app.Instrumentation;
     26 import android.os.Build;
     27 import android.support.test.InstrumentationRegistry;
     28 import android.support.test.filters.SmallTest;
     29 import android.support.test.rule.ActivityTestRule;
     30 import android.support.test.runner.AndroidJUnit4;
     31 import android.view.ViewGroup;
     32 import android.widget.LinearLayout;
     33 
     34 import androidx.recyclerview.widget.GridLayoutManager;
     35 import androidx.recyclerview.widget.LinearLayoutManager;
     36 import androidx.recyclerview.widget.RecyclerView;
     37 import androidx.recyclerview.widget.StaggeredGridLayoutManager;
     38 
     39 import org.junit.Rule;
     40 import org.junit.Test;
     41 import org.junit.runner.RunWith;
     42 
     43 @SmallTest
     44 @RunWith(AndroidJUnit4.class)
     45 public class RecyclerViewTest {
     46 
     47     @Rule
     48     public ActivityTestRule<RecyclerViewTestActivity> mActivityRule =
     49             new ActivityTestRule<>(RecyclerViewTestActivity.class);
     50 
     51     private void setContentView(final int layoutId) throws Throwable {
     52         final Activity activity = mActivityRule.getActivity();
     53         mActivityRule.runOnUiThread(new Runnable() {
     54             @Override
     55             public void run() {
     56                 activity.setContentView(layoutId);
     57             }
     58         });
     59     }
     60 
     61     @Test
     62     public void savedStateAccess() throws ClassNotFoundException {
     63         // this class should be accessible outside RecyclerView package
     64         assertNotNull(RecyclerView.SavedState.class);
     65         assertNotNull(LinearLayoutManager.SavedState.class);
     66         assertNotNull(GridLayoutManager.SavedState.class);
     67         assertNotNull(StaggeredGridLayoutManager.SavedState.class);
     68     }
     69 
     70     @Test
     71     public void inflation() throws Throwable {
     72         setContentView(R.layout.inflation_test);
     73         getInstrumentation().waitForIdleSync();
     74         RecyclerView view;
     75         view = (RecyclerView) getActivity().findViewById(R.id.clipToPaddingUndefined);
     76         assertTrue(view.getLayoutManager().getClipToPadding());
     77         view = (RecyclerView) getActivity().findViewById(R.id.clipToPaddingYes);
     78         assertTrue(view.getLayoutManager().getClipToPadding());
     79         view = (RecyclerView) getActivity().findViewById(R.id.clipToPaddingNo);
     80         assertFalse(view.getLayoutManager().getClipToPadding());
     81 
     82         view = (RecyclerView) getActivity().findViewById(R.id.recyclerView);
     83         RecyclerView.LayoutManager layoutManager = view.getLayoutManager();
     84         assertNotNull("LayoutManager not created.", layoutManager);
     85         assertEquals("Incorrect LayoutManager created",
     86                 layoutManager.getClass().getName(), GridLayoutManager.class.getName());
     87         GridLayoutManager gridLayoutManager = ((GridLayoutManager) layoutManager);
     88         assertEquals("Incorrect span count.", 3, gridLayoutManager.getSpanCount());
     89         assertEquals("Expected horizontal orientation.",
     90                 LinearLayout.HORIZONTAL, gridLayoutManager.getOrientation());
     91         assertTrue("Expected reversed layout", gridLayoutManager.getReverseLayout());
     92 
     93         view = (RecyclerView) getActivity().findViewById(R.id.recyclerView2);
     94         layoutManager = view.getLayoutManager();
     95         assertNotNull("LayoutManager not created.", layoutManager);
     96         assertEquals("Incorrect LayoutManager created",
     97                 layoutManager.getClass().getName(),
     98                 CustomLayoutManager.class.getName());
     99         CustomLayoutManager customLayoutManager =
    100                 (CustomLayoutManager) layoutManager;
    101         assertEquals("Expected vertical orientation.",
    102                 LinearLayout.VERTICAL, customLayoutManager.getOrientation());
    103         assertTrue("Expected items to be stacked from end", customLayoutManager.getStackFromEnd());
    104 
    105         view = (RecyclerView) getActivity().findViewById(R.id.recyclerView3);
    106         layoutManager = view.getLayoutManager();
    107         assertNotNull("LayoutManager not created.", layoutManager);
    108         assertEquals("Incorrect LayoutManager created",
    109                 layoutManager.getClass().getName(),
    110                 CustomLayoutManager.LayoutManager.class.getName());
    111 
    112         view = (RecyclerView) getActivity().findViewById(R.id.recyclerView4);
    113         layoutManager = view.getLayoutManager();
    114         assertNotNull("LayoutManager not created.", layoutManager);
    115         assertEquals("Incorrect LayoutManager created",
    116                 "androidx.recyclerview.test.PrivateLayoutManager",
    117                 layoutManager.getClass().getName());
    118 
    119         view = (RecyclerView) getActivity().findViewById(R.id.recyclerView5);
    120         assertTrue("Incorrect default nested scrolling value", view.isNestedScrollingEnabled());
    121 
    122         if (Build.VERSION.SDK_INT >= 21) {
    123             view = (RecyclerView) getActivity().findViewById(R.id.recyclerView6);
    124             assertFalse("Incorrect explicit nested scrolling value",
    125                     view.isNestedScrollingEnabled());
    126         }
    127 
    128         view = (RecyclerView) getActivity().findViewById(R.id.focusability_undefined);
    129         assertEquals(ViewGroup.FOCUS_AFTER_DESCENDANTS, view.getDescendantFocusability());
    130 
    131         view = (RecyclerView) getActivity().findViewById(R.id.focusability_after);
    132         assertEquals(ViewGroup.FOCUS_AFTER_DESCENDANTS, view.getDescendantFocusability());
    133 
    134         view = (RecyclerView) getActivity().findViewById(R.id.focusability_before);
    135         assertEquals(ViewGroup.FOCUS_BEFORE_DESCENDANTS, view.getDescendantFocusability());
    136 
    137         view = (RecyclerView) getActivity().findViewById(R.id.focusability_block);
    138         assertEquals(ViewGroup.FOCUS_BLOCK_DESCENDANTS, view.getDescendantFocusability());
    139     }
    140 
    141     private Activity getActivity() {
    142         return mActivityRule.getActivity();
    143     }
    144 
    145     private Instrumentation getInstrumentation() {
    146         return InstrumentationRegistry.getInstrumentation();
    147     }
    148 }
    149