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// Copyright 2014 Google Inc. All rights reserved.
//
// 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.google.devtools.build.lib.util;
import static com.google.common.truth.Truth.assertThat;
import static com.google.devtools.build.lib.util.StringUtil.capitalize;
import static com.google.devtools.build.lib.util.StringUtil.indent;
import static com.google.devtools.build.lib.util.StringUtil.joinEnglishList;
import static com.google.devtools.build.lib.util.StringUtil.splitAndInternString;
import static com.google.devtools.build.lib.util.StringUtil.stripSuffix;
import static org.junit.Assert.assertEquals;
import static org.junit.Assert.assertNull;
import static org.junit.Assert.assertSame;
import com.google.common.collect.ImmutableList;
import org.junit.Test;
import org.junit.runner.RunWith;
import org.junit.runners.JUnit4;
import java.util.Arrays;
import java.util.Collections;
import java.util.List;
/**
* A test for {@link StringUtil}.
*/
@RunWith(JUnit4.class)
public class StringUtilTest {
@Test
public void testJoinEnglishList() throws Exception {
assertEquals("nothing",
joinEnglishList(Collections.emptyList()));
assertEquals("one",
joinEnglishList(Arrays.asList("one")));
assertEquals("one or two",
joinEnglishList(Arrays.asList("one", "two")));
assertEquals("one and two",
joinEnglishList(Arrays.asList("one", "two"), "and"));
assertEquals("one, two or three",
joinEnglishList(Arrays.asList("one", "two", "three")));
assertEquals("one, two and three",
joinEnglishList(Arrays.asList("one", "two", "three"), "and"));
assertEquals("'one', 'two' and 'three'",
joinEnglishList(Arrays.asList("one", "two", "three"), "and", "'"));
}
@Test
public void splitAndIntern() throws Exception {
assertThat(splitAndInternString(" ")).isEmpty();
assertThat(splitAndInternString(null)).isEmpty();
List<String> list1 = splitAndInternString(" x y z z");
List<String> list2 = splitAndInternString("a z c z");
assertThat(list1).containsExactly("x", "y", "z", "z").inOrder();
assertThat(list2).containsExactly("a", "z", "c", "z").inOrder();
assertSame(list1.get(2), list1.get(3));
assertSame(list1.get(2), list2.get(1));
assertSame(list2.get(1), list2.get(3));
}
@Test
public void listItemsWithLimit() throws Exception {
assertEquals("begin/a, b, c/end", StringUtil.listItemsWithLimit(
new StringBuilder("begin/"), 3, ImmutableList.of("a", "b", "c")).append("/end").toString());
assertEquals("begin/a, b, c ...(omitting 2 more item(s))/end", StringUtil.listItemsWithLimit(
new StringBuilder("begin/"), 3, ImmutableList.of("a", "b", "c", "d", "e"))
.append("/end").toString());
}
@Test
public void testIndent() throws Exception {
assertThat(indent("", 0)).isEmpty();
assertThat(indent("", 1)).isEmpty();
assertEquals("a", indent("a", 1));
assertEquals("\n a", indent("\na", 2));
assertEquals("a\n b", indent("a\nb", 2));
assertEquals("a\n b\n c\n d", indent("a\nb\nc\nd", 1));
assertEquals("\n ", indent("\n", 1));
}
@Test
public void testStripSuffix() throws Exception {
assertThat(stripSuffix("", "")).isEmpty();
assertNull(stripSuffix("", "a"));
assertEquals("a", stripSuffix("a", ""));
assertEquals("a", stripSuffix("aa", "a"));
assertNull(stripSuffix("ab", "c"));
}
@Test
public void testCapitalize() throws Exception {
assertThat(capitalize("")).isEmpty();
assertEquals("Joe", capitalize("joe"));
assertEquals("Joe", capitalize("Joe"));
assertEquals("O", capitalize("o"));
assertEquals("O", capitalize("O"));
}
}
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