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// Copyright (c) 2017, the R8 project authors. Please see the AUTHORS file
// for details. All rights reserved. Use of this source code is governed by a
// BSD-style license that can be found in the LICENSE file.
package com.android.tools.r8.utils;
import static org.junit.Assert.assertEquals;
import static org.junit.Assert.assertSame;
import com.android.tools.r8.utils.StringUtils.BraceType;
import com.google.common.base.Strings;
import com.google.common.collect.ImmutableList;
import java.util.List;
import org.junit.Test;
public class StringUtilsTest {
@Test
public void splitLines() {
assertListEquals(ImmutableList.of(), StringUtils.splitLines(""));
assertListEquals(ImmutableList.of(""), StringUtils.splitLines("\n"));
assertListEquals(ImmutableList.of("", "", ""), StringUtils.splitLines("\n\n\n"));
assertListEquals(ImmutableList.of(" "," "), StringUtils.splitLines(" \n "));
assertListEquals(ImmutableList.of("a","b"), StringUtils.splitLines("a\nb"));
assertListEquals(ImmutableList.of("\r\r\r"), StringUtils.splitLines("\r\r\r"));
assertListEquals(ImmutableList.of("", "\r"), StringUtils.splitLines("\r\n\r"));
assertListEquals(ImmutableList.of("", "", "", "\r"), StringUtils.splitLines("\r\n\r\n\r\n\r"));
assertListEquals(ImmutableList.of("\r ", "\r \r"), StringUtils.splitLines("\r \r\n\r \r"));
assertListEquals(ImmutableList.of("\ra", "\rb\r"), StringUtils.splitLines("\ra\r\n\rb\r"));
assertListEquals(ImmutableList.of("\ra\r\rb\r"), StringUtils.splitLines("\ra\r\rb\r"));
}
private void assertListEquals(List<String> xs, List<String> ys) {
assertEquals(
StringUtils.join(xs, ", ", BraceType.SQUARE, s -> '"' + StringUtils.toASCIIString(s) + '"'),
StringUtils.join(ys, ", ", BraceType.SQUARE, s -> '"' + StringUtils.toASCIIString(s) + '"')
);
}
@Test
public void testTrim() {
assertEquals("", StringUtils.trim(""));
String empty = "";
assertSame(empty, StringUtils.trim(empty));
assertSame(Strings.repeat("A", 1), StringUtils.trim(Strings.repeat("A", 1)));
String oneChar = "A";
assertSame(oneChar, StringUtils.trim(oneChar));
assertEquals(Strings.repeat("A", 2), Strings.repeat("A", 2));
String twoChar = "AB";
assertSame(twoChar, StringUtils.trim(twoChar));
assertEquals(Strings.repeat("A", 10), Strings.repeat("A", 10));
String manyChar = Strings.repeat("A", 10);
assertSame(manyChar, StringUtils.trim(manyChar));
}
@Test
public void testTrimWithWhitespace() {
List<String> ws =
ImmutableList.of(
"",
" ",
" ",
"\t ",
" \t",
"" + StringUtils.BOM,
StringUtils.BOM + " " + StringUtils.BOM);
List<String> strings = ImmutableList.of("", "A", "AB", Strings.repeat("A", 10));
for (String before : ws) {
for (String after : ws) {
for (String string : strings) {
assertEquals(string, StringUtils.trim(before + string + after));
}
}
}
}
}