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Add tests for CollectionUtils

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This commit is contained in:
Paul Schaub 2022-11-25 14:55:46 +01:00
parent e1ab128c2e
commit 4426895814
Signed by: vanitasvitae
GPG key ID: 62BEE9264BF17311
1 changed files with 112 additions and 0 deletions
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pgpainless-core/src/test/java/org/pgpainless/util/CollectionUtilsTest.java Normal file
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// SPDX-FileCopyrightText: 2022 Paul Schaub <vanitasvitae@fsfe.org>
//
// SPDX-License-Identifier: Apache-2.0
package org.pgpainless.util;
import static org.junit.jupiter.api.Assertions.assertArrayEquals;
import static org.junit.jupiter.api.Assertions.assertEquals;
import static org.junit.jupiter.api.Assertions.assertFalse;
import static org.junit.jupiter.api.Assertions.assertTrue;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.Collections;
import java.util.Iterator;
import java.util.List;
import org.junit.jupiter.api.Test;
public class CollectionUtilsTest {
@Test
public void testConcat() {
String a = "A";
String[] bc = new String[] {"B", "C"};
String[] abc = CollectionUtils.concat(a, bc);
assertArrayEquals(new String[] {"A", "B", "C"}, abc);
}
@Test
public void testConcatWithEmptyArray() {
String a = "A";
String[] empty = new String[0];
String[] concat = CollectionUtils.concat(a, empty);
assertArrayEquals(new String[] {"A"}, concat);
}
@Test
public void iteratorToListTest() {
List<String> list = Arrays.asList("A", "B", "C");
Iterator<String> iterator = list.iterator();
List<String> listFromIterator = CollectionUtils.iteratorToList(iterator);
assertEquals(list, listFromIterator);
}
@Test
public void iteratorToList_emptyIteratorTest() {
Iterator<String> iterator = Collections.emptyIterator();
List<String> listFromIterator = CollectionUtils.iteratorToList(iterator);
assertTrue(listFromIterator.isEmpty());
}
@Test
public void containsTest() {
String[] abc = new String[] {"A", "B", "C"};
assertTrue(CollectionUtils.contains(abc, "A"));
assertTrue(CollectionUtils.contains(abc, "B"));
assertTrue(CollectionUtils.contains(abc, "C"));
assertFalse(CollectionUtils.contains(abc, "D"));
}
@Test
public void contains_emptyTest() {
String[] empty = new String[0];
assertFalse(CollectionUtils.contains(empty, "A"));
}
@Test
public void addAllTest() {
List<String> list = new ArrayList<>();
list.add("A");
list.add("B");
List<String> other = new ArrayList<>();
other.add("C");
other.add("D");
Iterator<String> iterator = other.iterator();
CollectionUtils.addAll(iterator, list);
assertEquals(Arrays.asList("A", "B", "C", "D"), list);
}
@Test
public void addAllEmptyListTest() {
List<String> empty = new ArrayList<>();
List<String> other = Arrays.asList("A", "B", "C");
Iterator<String> iterator = other.iterator();
CollectionUtils.addAll(iterator, empty);
assertEquals(Arrays.asList("A", "B", "C"), empty);
}
@Test
public void addAllEmptyIterator() {
List<String> list = new ArrayList<>();
list.add("A");
list.add("B");
Iterator<String> iterator = Collections.emptyIterator();
CollectionUtils.addAll(iterator, list);
assertEquals(Arrays.asList("A", "B"), list);
}
}