Android example source code file (ViewGroupAttributesTest.java)

This example Android source code file (ViewGroupAttributesTest.java) is included in the DevDaily.com "Java Source Code Warehouse" project. The intent of this project is to help you "Learn Android by Example" ^TM.

Java - Android tags/keywords

android, androidtestcase, content, illegalargumentexception, myviewgroup, override, smalltest, string, test, viewgroupattributestest

The ViewGroupAttributesTest.java Android example source code

/*
 * Copyright (C) 2008 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 android.view;

import android.content.Context;
import android.test.AndroidTestCase;
import android.test.suitebuilder.annotation.SmallTest;

public class ViewGroupAttributesTest extends AndroidTestCase {

    private MyViewGroup mViewGroup;

    private static final class MyViewGroup extends ViewGroup {

        public MyViewGroup(Context context) {
            super(context);
        }

        @Override
        protected void onLayout(boolean changed, int l, int t, int r, int b) {
        }
        
        @Override
        public boolean isChildrenDrawnWithCacheEnabled() {
            return super.isChildrenDrawnWithCacheEnabled();
        }
    }

    @Override
    protected void setUp() throws Exception {
        super.setUp();
        mViewGroup = new MyViewGroup(getContext());
    }

    @SmallTest
    public void testDescendantFocusabilityEnum() {
        assertEquals("expected ViewGroup.FOCUS_BEFORE_DESCENDANTS to be default",
                ViewGroup.FOCUS_BEFORE_DESCENDANTS, mViewGroup.getDescendantFocusability());

        // remember some state before we muck with flags
        final boolean isAnimationCachEnabled = mViewGroup.isAnimationCacheEnabled();
        final boolean isAlwaysDrawnWithCacheEnabled = mViewGroup.isAlwaysDrawnWithCacheEnabled();
        final boolean isChildrenDrawnWithCacheEnabled = mViewGroup.isChildrenDrawnWithCacheEnabled();

        mViewGroup.setDescendantFocusability(ViewGroup.FOCUS_AFTER_DESCENDANTS);
        assertEquals(ViewGroup.FOCUS_AFTER_DESCENDANTS, mViewGroup.getDescendantFocusability());

        mViewGroup.setDescendantFocusability(ViewGroup.FOCUS_BLOCK_DESCENDANTS);
        assertEquals(ViewGroup.FOCUS_BLOCK_DESCENDANTS, mViewGroup.getDescendantFocusability());

        mViewGroup.setDescendantFocusability(ViewGroup.FOCUS_BEFORE_DESCENDANTS);
        assertEquals(ViewGroup.FOCUS_BEFORE_DESCENDANTS, mViewGroup.getDescendantFocusability());

        // verify we didn't change something unrelated
        final String msg = "setDescendantFocusability messed with an unrelated flag";
        assertEquals(msg, isAnimationCachEnabled, mViewGroup.isAnimationCacheEnabled());
        assertEquals(msg, isAlwaysDrawnWithCacheEnabled, mViewGroup.isAlwaysDrawnWithCacheEnabled());
        assertEquals(msg, isChildrenDrawnWithCacheEnabled, mViewGroup.isChildrenDrawnWithCacheEnabled());
    }

    @SmallTest
    public void testWrongIntSetForDescendantFocusabilityEnum() {
        try {
            mViewGroup.setDescendantFocusability(0);
            fail("expected setting wrong flag to throw an exception");
        } catch (IllegalArgumentException expected) {
        }
    }
}