/*
* SonarQube
* Copyright (C) 2009-2017 SonarSource SA
* mailto:info AT sonarsource DOT com
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 3 of the License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public License
* along with this program; if not, write to the Free Software Foundation,
* Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
*/
package org.sonar.core.hash;
import java.nio.charset.StandardCharsets;
import javax.annotation.Nullable;
import org.apache.commons.codec.digest.DigestUtils;
import org.junit.Rule;
import org.junit.Test;
import org.junit.rules.ExpectedException;
import static org.assertj.core.api.Assertions.assertThat;
public class SourceLinesHashesComputerTest {
@Rule
public ExpectedException expectedException = ExpectedException.none();
@Test
public void addLine_throws_NPE_is_line_null() {
expectedException.expect(NullPointerException.class);
expectedException.expectMessage("line can not be null");
new SourceLinesHashesComputer(1).addLine(null);
}
@Test
public void hash_of_empty_string_is_empty_string() {
assertThat(hashSingleLine("")).isEqualTo("");
}
@Test
public void tab_and_spaces_are_ignored_from_hash() {
assertThat(hashSingleLine(" ")).isEqualTo("");
assertThat(hashSingleLine("\t")).isEqualTo("");
assertThat(hashSingleLine("\t \t \t\t ")).isEqualTo("");
String abHash = hashSingleLine("ab");
assertThat(hashSingleLine("a b")).isEqualTo(abHash);
assertThat(hashSingleLine("a\tb")).isEqualTo(abHash);
assertThat(hashSingleLine("\t a\t \tb\t ")).isEqualTo(abHash);
}
@Test
public void hash_of_line_is_md5_of_UTF_char_array_as_an_hex_string() {
String lineWithAccentAndSpace = "Yolo lélà";
assertThat(hashSingleLine(lineWithAccentAndSpace)).isEqualTo(
DigestUtils.md5Hex("Yololélà".getBytes(StandardCharsets.UTF_8)));
}
@Test
public void getLineHashes_returns_line_hash_in_order_of_addLine_calls() {
String line1 = "line 1";
String line2 = "line 1 + 1";
String line3 = "line 10 - 7";
SourceLinesHashesComputer underTest = new SourceLinesHashesComputer();
underTest.addLine(line1);
underTest.addLine(line2);
underTest.addLine(line3);
assertThat(underTest.getLineHashes()).containsExactly(
hashSingleLine(line1), hashSingleLine(line2), hashSingleLine(line3));
}
private static String hashSingleLine(@Nullable String line) {
SourceLinesHashesComputer sourceLinesHashesComputer = new SourceLinesHashesComputer(1);
sourceLinesHashesComputer.addLine(line);
return sourceLinesHashesComputer.getLineHashes().iterator().next();
}
}