androidx.core.view.ViewCompatTest Maven / Gradle / Ivy

Go to download
Show more of this group Show more artifacts with this name
Show all versions of android-all Show documentation
A library jar that provides APIs for Applications written for the Google Android Platform.
There is a newer version: 14-robolectric-10818077
/*
 * Copyright 2018 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.core.view;

import static org.hamcrest.CoreMatchers.equalTo;
import static org.junit.Assert.assertEquals;
import static org.junit.Assert.assertNotNull;
import static org.junit.Assert.assertNull;
import static org.junit.Assert.assertSame;
import static org.junit.Assert.assertThat;
import static org.junit.Assert.assertTrue;

import android.app.Activity;
import android.support.test.filters.SmallTest;
import android.support.test.runner.AndroidJUnit4;
import android.support.v4.BaseInstrumentationTestCase;
import android.view.Display;
import android.view.View;

import androidx.core.test.R;

import org.junit.Before;
import org.junit.Test;
import org.junit.runner.RunWith;

import java.util.HashSet;
import java.util.Set;

@RunWith(AndroidJUnit4.class)
@SmallTest
public class ViewCompatTest extends BaseInstrumentationTestCase {

    private View mView;

    public ViewCompatTest() {
        super(ViewCompatActivity.class);
    }

    @Before
    public void setUp() {
        final Activity activity = mActivityTestRule.getActivity();
        mView = activity.findViewById(R.id.view);
    }

    @Test
    public void testConstants() {
        // Compat constants must match core constants since they can be used interchangeably
        // in various support lib calls.
        assertEquals("LTR constants", View.LAYOUT_DIRECTION_LTR, ViewCompat.LAYOUT_DIRECTION_LTR);
        assertEquals("RTL constants", View.LAYOUT_DIRECTION_RTL, ViewCompat.LAYOUT_DIRECTION_RTL);
    }

    @Test
    public void testGetDisplay() {
        final Display display = ViewCompat.getDisplay(mView);
        assertNotNull(display);
    }

    @Test
    public void testGetDisplay_returnsNullForUnattachedView() {
        final View view = new View(mActivityTestRule.getActivity());
        final Display display = ViewCompat.getDisplay(view);
        assertNull(display);
    }

    @Test
    public void testTransitionName() {
        final View view = new View(mActivityTestRule.getActivity());
        ViewCompat.setTransitionName(view, "abc");
        assertEquals("abc", ViewCompat.getTransitionName(view));
    }

    @Test
    public void testGenerateViewId() {
        final int requestCount = 100;

        Set generatedIds = new HashSet<>();
        for (int i = 0; i < requestCount; i++) {
            int generatedId = ViewCompat.generateViewId();
            assertTrue(isViewIdGenerated(generatedId));
            generatedIds.add(generatedId);
        }

        assertThat(generatedIds.size(), equalTo(requestCount));
    }

    @Test
    public void testRequireViewByIdFound() {
        View container = mActivityTestRule.getActivity().findViewById(R.id.container);
        assertSame(mView, ViewCompat.requireViewById(container, R.id.view));
    }

    @Test(expected = IllegalArgumentException.class)
    public void testRequireViewByIdMissing() {
        View container = mActivityTestRule.getActivity().findViewById(R.id.container);

        // action_bar isn't present inside container
        ViewCompat.requireViewById(container, R.id.action_bar);
    }

    @Test(expected = IllegalArgumentException.class)
    public void testRequireViewByIdInvalid() {
        View container = mActivityTestRule.getActivity().findViewById(R.id.container);

        // NO_ID is always invalid
        ViewCompat.requireViewById(container, View.NO_ID);
    }

    private static boolean isViewIdGenerated(int id) {
        return (id & 0xFF000000) == 0 && (id & 0x00FFFFFF) != 0;
    }
}