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82 lines
2.6 KiB
Java
82 lines
2.6 KiB
Java
// Copyright 2016 The Nomulus Authors. All Rights Reserved.
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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package google.registry.util;
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import static com.google.common.truth.Truth.assertThat;
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import static google.registry.util.CollectionUtils.nullToEmpty;
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import static google.registry.util.CollectionUtils.partitionMap;
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import com.google.common.collect.HashMultimap;
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import com.google.common.collect.ImmutableList;
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import com.google.common.collect.ImmutableMap;
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import google.registry.testing.ExceptionRule;
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import java.util.Map;
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import org.junit.Rule;
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import org.junit.Test;
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import org.junit.runner.RunWith;
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import org.mockito.runners.MockitoJUnitRunner;
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/** Unit tests for {@link CollectionUtils} */
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@RunWith(MockitoJUnitRunner.class)
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public class CollectionUtilsTest {
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@Rule
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public final ExceptionRule thrown = new ExceptionRule();
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@Test
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public void testNullToEmptyMap_leavesNonNullAlone() {
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Map<String, Integer> map = ImmutableMap.of("hello", 1);
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assertThat(nullToEmpty(map)).isEqualTo(map);
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}
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@Test
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public void testNullToEmptyMap_convertsNullToEmptyMap() {
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Map<String, Integer> map = null;
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Map<String, Integer> convertedMap = nullToEmpty(map);
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assertThat(map).isNull();
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assertThat(convertedMap).isNotNull();
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assertThat(convertedMap).isEmpty();
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}
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@Test
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public void testPartitionMap() {
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Map<String, String> map = ImmutableMap.of("ka", "va", "kb", "vb", "kc", "vc");
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assertThat(partitionMap(map, 2)).containsExactlyElementsIn(ImmutableList.of(
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ImmutableMap.of("ka", "va", "kb", "vb"),
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ImmutableMap.of("kc", "vc")));
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}
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@Test
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public void testPartitionMap_emptyInput() {
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assertThat(partitionMap(ImmutableMap.of(), 100)).isEmpty();
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}
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@Test
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public void testPartitionMap_negativePartitionSize() {
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thrown.expect(IllegalArgumentException.class);
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partitionMap(ImmutableMap.of("A", "b"), -2);
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}
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@Test
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public void testPartitionMap_nullMap() {
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thrown.expect(NullPointerException.class);
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partitionMap(null, 100);
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}
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@Test
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public void testDeadCodeWeDontWantToDelete() throws Exception {
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CollectionUtils.nullToEmpty(HashMultimap.create());
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}
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}
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