| /* |
| * Copyright 2012-present Facebook, Inc. |
| * |
| * 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 |
| * |
| * 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 com.facebook.buck.util; |
| |
| import static org.junit.Assert.assertEquals; |
| |
| import com.google.common.base.Optional; |
| import com.google.common.collect.ImmutableSet; |
| |
| import org.junit.Test; |
| |
| /** |
| * Unit test for {@link Optionals}. |
| */ |
| public class OptionalsTest { |
| |
| @Test |
| public void testAbsentItemNotAdded() { |
| Optional<String> absent = Optional.absent(); |
| ImmutableSet.Builder<String> builder = ImmutableSet.builder(); |
| |
| Optionals.addIfPresent(absent, builder); |
| |
| assertEquals(ImmutableSet.<String>of(), builder.build()); |
| } |
| |
| @Test |
| public void testPresentItemAdded() { |
| Optional<String> absent = Optional.of("Hello"); |
| ImmutableSet.Builder<String> builder = ImmutableSet.builder(); |
| |
| Optionals.addIfPresent(absent, builder); |
| |
| assertEquals(ImmutableSet.of("Hello"), builder.build()); |
| } |
| } |