| /* |
| * Licensed to the Apache Software Foundation (ASF) under one |
| * or more contributor license agreements. See the NOTICE file |
| * distributed with this work for additional information |
| * regarding copyright ownership. The ASF licenses this file |
| * to you 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 |
| * |
| * http://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 org.apache.reef.util; |
| |
| import org.junit.Assert; |
| import org.junit.Test; |
| |
| /** |
| * Tests for CollectionUtils functions. |
| */ |
| public final class CollectionUtilsTest { |
| |
| @Test |
| public void testNullToEmptyNull() { |
| Assert.assertNotNull("Method should never return null", CollectionUtils.nullToEmpty(null)); |
| } |
| |
| @Test |
| public void testNullToEmptyNull2() { |
| final Integer[] array = new Integer[0]; |
| Assert.assertArrayEquals("Must return an empty array", array, CollectionUtils.nullToEmpty(null)); |
| } |
| |
| @Test |
| public void testNullToEmptyIntegers() { |
| final Integer[] array = new Integer[] {1, 2, 3}; |
| Assert.assertArrayEquals("Must return the same array", array, CollectionUtils.nullToEmpty(array)); |
| Assert.assertTrue("Must return reference to the same object", array == CollectionUtils.nullToEmpty(array)); |
| } |
| |
| @Test |
| public void testNullToEmptyZeroLength() { |
| final Integer[] array = new Integer[0]; |
| Assert.assertArrayEquals("Must return the same array", array, CollectionUtils.nullToEmpty(array)); |
| Assert.assertTrue("Must return reference to the same object", array == CollectionUtils.nullToEmpty(array)); |
| } |
| } |