Merge "Prevent key removal on cache update" into qt-r1-dev am: c1dc1fac

                if (mEvictionCallback != null) {

                    mEvictionCallback.onEntryEvicted(mKeys.get(taskId));

                }

                // Only remove from mKeys on cache remove, not a cache update.

                if (newV == null) {

                    mKeys.remove(taskId);

                }

            }

        };

    }

/*

 * Copyright (C) 2019 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 com.android.systemui.shared.recents.model;

import static junit.framework.TestCase.assertEquals;

import static junit.framework.TestCase.assertNull;

import android.test.suitebuilder.annotation.SmallTest;

import com.android.systemui.SysuiTestCase;

import org.junit.Before;

import org.junit.Test;

import org.junit.runner.RunWith;

import org.junit.runners.JUnit4;

@SmallTest

@RunWith(JUnit4.class)

public class TaskKeyLruCacheTest extends SysuiTestCase {

    private static int sCacheSize = 3;

    private static int sIdTask1 = 1;

    private static int sIdTask2 = 2;

    private static int sIdTask3 = 3;

    private static int sIdUser1 = 1;

    TaskKeyCache<Integer> mCache = new TaskKeyLruCache<>(sCacheSize, null);

    Task.TaskKey mKey1;

    Task.TaskKey mKey2;

    Task.TaskKey mKey3;

    @Before

    public void setup() {

        mKey1 = new Task.TaskKey(sIdTask1, 0, null, null, sIdUser1, System.currentTimeMillis());

        mKey2 = new Task.TaskKey(sIdTask2, 0, null, null, sIdUser1, System.currentTimeMillis());

        mKey3 = new Task.TaskKey(sIdTask3, 0, null, null, sIdUser1, System.currentTimeMillis());

    }

    @Test

    public void addSingleItem_get_success() {

        mCache.put(mKey1, 1);

        assertEquals(1, (int) mCache.get(mKey1));

    }

    @Test

    public void addSingleItem_getUninsertedItem_returnsNull() {

        mCache.put(mKey1, 1);

        assertNull(mCache.get(mKey2));

    }

    @Test

    public void emptyCache_get_returnsNull() {

        assertNull(mCache.get(mKey1));

    }

    @Test

    public void updateItem_get_returnsSecond() {

        mCache.put(mKey1, 1);

        mCache.put(mKey1, 2);

        assertEquals(2, (int) mCache.get(mKey1));

        assertEquals(1, mCache.mKeys.size());

    }

    @Test

    public void fillCache_put_evictsOldest() {

        mCache.put(mKey1, 1);

        mCache.put(mKey2, 2);

        mCache.put(mKey3, 3);

        Task.TaskKey key4 = new Task.TaskKey(sIdTask3 + 1, 0,

                null, null, sIdUser1, System.currentTimeMillis());

        mCache.put(key4, 4);

        assertNull(mCache.get(mKey1));

        assertEquals(3, mCache.mKeys.size());

        assertEquals(mKey2, mCache.mKeys.valueAt(0));

    }

    @Test

    public void fillCache_remove_success() {

        mCache.put(mKey1, 1);

        mCache.put(mKey2, 2);

        mCache.put(mKey3, 3);

        mCache.remove(mKey2);

        assertNull(mCache.get(mKey2));

        assertEquals(2, mCache.mKeys.size());

    }

}