| /* |
| * Copyright 2013-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.java.abi; |
| |
| import static org.hamcrest.Matchers.containsString; |
| import static org.hamcrest.Matchers.not; |
| import static org.junit.Assert.assertEquals; |
| import static org.junit.Assert.assertThat; |
| |
| import com.google.common.collect.ImmutableList; |
| |
| import org.junit.Test; |
| |
| public class JoinerTest { |
| |
| @Test(expected = NullPointerException.class) |
| public void separatorMustNotBeNull() { |
| Joiner.on(null); |
| } |
| |
| @Test |
| public void aSingleItemShouldNotBeJoinedWithAnything() { |
| String joined = Joiner.on(",").join(ImmutableList.of("hello")); |
| |
| assertThat(joined, not(containsString(","))); |
| } |
| |
| @Test |
| public void separatorShouldOnlyBeInsertedBetweenItems() { |
| String joined = Joiner.on(".").join(ImmutableList.of("hello", "world")); |
| |
| assertEquals("hello.world", joined); |
| } |
| |
| @Test |
| public void shouldAppendToAStringBuilder() { |
| StringBuilder builder = new StringBuilder("This example: "); |
| Joiner.on(", ").appendTo(builder, ImmutableList.of("one", "two", "three")); |
| |
| assertEquals("This example: one, two, three", builder.toString()); |
| } |
| } |