| /* |
| * Copyright (C) 2017 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.server.backup.utils; |
| |
| import static com.google.common.truth.Truth.assertThat; |
| |
| import android.platform.test.annotations.Presubmit; |
| import android.util.SparseArray; |
| |
| import androidx.test.filters.SmallTest; |
| import androidx.test.runner.AndroidJUnit4; |
| |
| import com.google.android.collect.Sets; |
| |
| import org.junit.Test; |
| import org.junit.runner.RunWith; |
| |
| import java.util.HashSet; |
| |
| @SmallTest |
| @Presubmit |
| @RunWith(AndroidJUnit4.class) |
| public class SparseArrayUtilsTest { |
| @Test |
| public void union_mergesSets() { |
| SparseArray<HashSet<String>> sparseArray = new SparseArray<>(); |
| sparseArray.append(12, Sets.newHashSet("a", "b", "c")); |
| sparseArray.append(45, Sets.newHashSet("d", "e")); |
| sparseArray.append(46, Sets.newHashSet()); |
| sparseArray.append(66, Sets.newHashSet("a", "e", "f")); |
| |
| assertThat(SparseArrayUtils.union(sparseArray)).isEqualTo( |
| Sets.newHashSet("a", "b", "c", "d", "e", "f")); |
| } |
| |
| @Test |
| public void union_returnsEmptySetForEmptyList() { |
| SparseArray<HashSet<String>> sparseArray = new SparseArray<>(); |
| |
| assertThat(SparseArrayUtils.union(sparseArray)).isEqualTo(Sets.newHashSet()); |
| } |
| } |