mirror of
https://github.com/pgpainless/pgpainless.git
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90 lines
2.6 KiB
Java
90 lines
2.6 KiB
Java
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/*
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* Copyright 2021 Paul Schaub.
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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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*/
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package sop.util;
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import static org.junit.jupiter.api.Assertions.assertEquals;
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import static org.junit.jupiter.api.Assertions.assertFalse;
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import static org.junit.jupiter.api.Assertions.assertNull;
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import static org.junit.jupiter.api.Assertions.assertThrows;
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import static org.junit.jupiter.api.Assertions.assertTrue;
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import org.junit.jupiter.api.Test;
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public class OptionalTest {
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@Test
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public void testEmpty() {
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Optional<String> optional = new Optional<>();
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assertEmpty(optional);
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}
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@Test
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public void testArg() {
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String string = "foo";
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Optional<String> optional = new Optional<>(string);
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assertFalse(optional.isEmpty());
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assertTrue(optional.isPresent());
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assertEquals(string, optional.get());
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}
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@Test
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public void testOfEmpty() {
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Optional<String> optional = Optional.ofEmpty();
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assertEmpty(optional);
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}
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@Test
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public void testNullArg() {
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Optional<String> optional = new Optional<>(null);
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assertEmpty(optional);
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}
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@Test
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public void testOfWithNullArgThrows() {
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assertThrows(NullPointerException.class, () -> Optional.of(null));
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}
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@Test
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public void testOf() {
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String string = "Hello, World!";
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Optional<String> optional = Optional.of(string);
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assertFalse(optional.isEmpty());
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assertTrue(optional.isPresent());
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assertEquals(string, optional.get());
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}
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@Test
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public void testOfNullableWithNull() {
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Optional<String> optional = Optional.ofNullable(null);
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assertEmpty(optional);
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}
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@Test
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public void testOfNullableWithArg() {
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Optional<String> optional = Optional.ofNullable("bar");
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assertEquals("bar", optional.get());
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assertFalse(optional.isEmpty());
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assertTrue(optional.isPresent());
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}
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private <T> void assertEmpty(Optional<T> optional) {
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assertTrue(optional.isEmpty());
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assertFalse(optional.isPresent());
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assertNull(optional.get());
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}
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}
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