| // Copyright 2014 The Bazel Authors. All rights reserved. |
| // |
| // 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.google.devtools.build.lib.collect; |
| |
| import static com.google.common.truth.Truth.assertThat; |
| import static org.junit.Assert.assertThrows; |
| |
| import com.google.common.collect.ImmutableList; |
| import com.google.common.collect.ImmutableSet; |
| import com.google.common.collect.Lists; |
| import com.google.common.collect.Sets; |
| import java.util.List; |
| import java.util.Set; |
| import org.junit.Test; |
| import org.junit.runner.RunWith; |
| import org.junit.runners.JUnit4; |
| |
| /** Tests for {@link CollectionUtils}. */ |
| @RunWith(JUnit4.class) |
| public final class CollectionUtilsTest { |
| |
| @Test |
| public void testDuplicatedElementsOf() { |
| assertDups(ImmutableList.of(), ImmutableSet.of()); |
| assertDups(ImmutableList.of(0), ImmutableSet.of()); |
| assertDups(ImmutableList.of(0, 0, 0), ImmutableSet.of(0)); |
| assertDups(ImmutableList.of(1, 2, 3, 1, 2, 3), ImmutableSet.of(1, 2, 3)); |
| assertDups(ImmutableList.of(1, 2, 3, 1, 2, 3, 4), ImmutableSet.of(1, 2, 3)); |
| assertDups(ImmutableList.of(1, 2, 3, 4), ImmutableSet.of()); |
| } |
| |
| private static void assertDups(List<Integer> collection, Set<Integer> dups) { |
| assertThat(CollectionUtils.duplicatedElementsOf(collection)).isEqualTo(dups); |
| } |
| |
| @Test |
| public void testIsImmutable() { |
| assertThat(CollectionUtils.isImmutable(ImmutableList.of(1, 2, 3))).isTrue(); |
| assertThat(CollectionUtils.isImmutable(ImmutableSet.of(1, 2, 3))).isTrue(); |
| |
| Iterable<Integer> chain = IterablesChain.<Integer>builder().addElement(1).build(); |
| |
| assertThat(CollectionUtils.isImmutable(chain)).isTrue(); |
| |
| assertThat(CollectionUtils.isImmutable(Lists.newArrayList())).isFalse(); |
| assertThat(CollectionUtils.isImmutable(Lists.newLinkedList())).isFalse(); |
| assertThat(CollectionUtils.isImmutable(Sets.newHashSet())).isFalse(); |
| assertThat(CollectionUtils.isImmutable(Sets.newLinkedHashSet())).isFalse(); |
| } |
| |
| @Test |
| public void testCheckImmutable() { |
| CollectionUtils.checkImmutable(ImmutableList.of(1, 2, 3)); |
| CollectionUtils.checkImmutable(ImmutableSet.of(1, 2, 3)); |
| |
| List<Integer> mutableList = Lists.newArrayList(1, 2, 3); |
| assertThrows(IllegalStateException.class, () -> CollectionUtils.checkImmutable(mutableList)); |
| } |
| |
| @Test |
| public void testMakeImmutable() { |
| Iterable<Integer> immutableList = ImmutableList.of(1, 2, 3); |
| assertThat(CollectionUtils.makeImmutable(immutableList)).isSameInstanceAs(immutableList); |
| |
| List<Integer> mutableList = Lists.newArrayList(1, 2, 3); |
| Iterable<Integer> converted = CollectionUtils.makeImmutable(mutableList); |
| assertThat(converted).isNotSameInstanceAs(mutableList); |
| assertThat(ImmutableList.copyOf(converted)).isEqualTo(mutableList); |
| } |
| |
| @Test |
| public void isNullOrEmpty_null() { |
| assertThat(CollectionUtils.isNullOrEmpty(null)).isTrue(); |
| } |
| |
| @Test |
| public void isNullOrEmpty_empty() { |
| assertThat(CollectionUtils.isNullOrEmpty(ImmutableList.of())).isTrue(); |
| } |
| |
| @Test |
| public void isNullOrEmpty_nonEmpty() { |
| assertThat(CollectionUtils.isNullOrEmpty(ImmutableList.of(1))).isFalse(); |
| } |
| } |