91 lines
3.4 KiB
Java
91 lines
3.4 KiB
Java
/*
|
|
* Copyright 2024-2025 the original author or authors.
|
|
*
|
|
* 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
|
|
*
|
|
* https://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 xyz.zhouxy.plusone.commons.collection;
|
|
|
|
import static org.junit.jupiter.api.Assertions.assertEquals;
|
|
import static org.junit.jupiter.api.Assertions.assertFalse;
|
|
import static org.junit.jupiter.api.Assertions.assertInstanceOf;
|
|
import static org.junit.jupiter.api.Assertions.assertSame;
|
|
import static org.junit.jupiter.api.Assertions.assertThrows;
|
|
import static org.junit.jupiter.api.Assertions.assertTrue;
|
|
|
|
import java.lang.reflect.Constructor;
|
|
import java.util.ArrayList;
|
|
import java.util.Arrays;
|
|
import java.util.Collections;
|
|
import java.util.HashMap;
|
|
import java.util.List;
|
|
import java.util.Map;
|
|
import java.util.Set;
|
|
|
|
import org.junit.jupiter.api.Test;
|
|
|
|
import com.google.common.collect.ImmutableMap;
|
|
import com.google.common.collect.Lists;
|
|
import com.google.common.collect.Sets;
|
|
|
|
public class CollectionToolsTests {
|
|
@Test
|
|
void testIsEmpty() {
|
|
|
|
List<String> list = new ArrayList<>();
|
|
assertTrue(CollectionTools.isEmpty(list));
|
|
assertFalse(CollectionTools.isNotEmpty(list));
|
|
|
|
list.add("Test");
|
|
assertFalse(CollectionTools.isEmpty(list));
|
|
assertTrue(CollectionTools.isNotEmpty(list));
|
|
|
|
Map<String, Integer> map = new HashMap<>();
|
|
assertTrue(CollectionTools.isEmpty(map));
|
|
assertFalse(CollectionTools.isNotEmpty(map));
|
|
|
|
map.put("2", 2);
|
|
assertFalse(CollectionTools.isEmpty(map));
|
|
assertTrue(CollectionTools.isNotEmpty(map));
|
|
}
|
|
|
|
@Test
|
|
void testNullToEmpty() {
|
|
List<String> list = Lists.newArrayList("Java", "C", "C++", "C#");
|
|
assertSame(list, CollectionTools.nullToEmptyList(list));
|
|
assertEquals(Collections.emptyList(), CollectionTools.nullToEmptyList(null));
|
|
|
|
Set<String> set = Sets.newHashSet("Java", "C", "C++", "C#");
|
|
assertSame(set, CollectionTools.nullToEmptySet(set));
|
|
assertEquals(Collections.emptySet(), CollectionTools.nullToEmptySet(null));
|
|
|
|
Map<String, Integer> map = ImmutableMap.of("K1", 1, "K2", 2, "K3", 3);
|
|
assertSame(map, CollectionTools.nullToEmptyMap(map));
|
|
assertEquals(Collections.emptyMap(), CollectionTools.nullToEmptyMap(null));
|
|
}
|
|
|
|
@Test
|
|
void test_constructor_isNotAccessible_ThrowsIllegalStateException() {
|
|
Constructor<?>[] constructors = CollectionTools.class.getDeclaredConstructors();
|
|
Arrays.stream(constructors)
|
|
.forEach(constructor -> {
|
|
assertFalse(constructor.isAccessible());
|
|
constructor.setAccessible(true);
|
|
Throwable cause = assertThrows(Exception.class, constructor::newInstance)
|
|
.getCause();
|
|
assertInstanceOf(IllegalStateException.class, cause);
|
|
assertEquals("Utility class", cause.getMessage());
|
|
});
|
|
}
|
|
}
|