1 /* 2 * Licensed to the Apache Software Foundation (ASF) under one or more 3 * contributor license agreements. See the NOTICE file distributed with 4 * this work for additional information regarding copyright ownership. 5 * The ASF licenses this file to You under the Apache License, Version 2.0 6 * (the "License"); you may not use this file except in compliance with 7 * the License. You may obtain a copy of the License at 8 * 9 * http://www.apache.org/licenses/LICENSE-2.0 10 * 11 * Unless required by applicable law or agreed to in writing, software 12 * distributed under the License is distributed on an "AS IS" BASIS, 13 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 14 * See the License for the specific language governing permissions and 15 * limitations under the License. 16 */ 17 18 package org.apache.commons.lang3.function; 19 20 import static org.junit.jupiter.api.Assertions.assertEquals; 21 import static org.junit.jupiter.api.Assertions.assertNull; 22 23 import java.util.function.Supplier; 24 25 import org.apache.commons.lang3.AbstractLangTest; 26 import org.junit.jupiter.api.Test; 27 28 /** 29 * Tests {@link Suppliers}. 30 */ 31 public class SuppliersTest extends AbstractLangTest { 32 33 /** 34 * Tests {@link Suppliers#get(Supplier)}. 35 */ 36 @Test 37 public void testGet() { 38 assertNull(Suppliers.get(null)); 39 assertNull(Suppliers.get(() -> null)); 40 assertNull(Suppliers.get(Suppliers.nul())); 41 assertEquals("foo", Suppliers.get(() -> "foo")); 42 } 43 }