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/*
* Copyright (C) 2009-2010, Google Inc.
* Copyright (C) 2009, Johannes E. Schindelin <johannes.schindelin@gmx.de> and others
*
* This program and the accompanying materials are made available under the
* terms of the Eclipse Distribution License v. 1.0 which is available at
* https://www.eclipse.org/org/documents/edl-v10.php.
*
* SPDX-License-Identifier: BSD-3-Clause
*/
package org.eclipse.jgit.diff;
import static org.junit.Assert.assertEquals;
import static org.junit.Assert.assertFalse;
import static org.junit.Assert.assertNotEquals;
import static org.junit.Assert.assertTrue;
import org.eclipse.jgit.lib.Constants;
import org.junit.Test;
public class RawTextIgnoreWhitespaceChangeTest {
private final RawTextComparator cmp = RawTextComparator.WS_IGNORE_CHANGE;
@Test
public void testEqualsWithoutWhitespace() {
final RawText a = new RawText(Constants
.encodeASCII("foo-a\nfoo-b\nfoo\n"));
final RawText b = new RawText(Constants
.encodeASCII("foo-b\nfoo-c\nf\n"));
assertEquals(3, a.size());
assertEquals(3, b.size());
// foo-a != foo-b
assertFalse(cmp.equals(a, 0, b, 0));
assertFalse(cmp.equals(b, 0, a, 0));
// foo-b == foo-b
assertTrue(cmp.equals(a, 1, b, 0));
assertTrue(cmp.equals(b, 0, a, 1));
// foo != f
assertFalse(cmp.equals(a, 2, b, 2));
assertFalse(cmp.equals(b, 2, a, 2));
}
@Test
public void testEqualsWithWhitespace() {
final RawText a = new RawText(Constants
.encodeASCII("foo-a\n \n a b c\na \n foo\na b c\n"));
final RawText b = new RawText(Constants
.encodeASCII("foo-a b\n\nab c\na\nfoo\na b c \n"));
// "foo-a" != "foo-a b"
assertFalse(cmp.equals(a, 0, b, 0));
assertFalse(cmp.equals(b, 0, a, 0));
// " " == ""
assertTrue(cmp.equals(a, 1, b, 1));
assertTrue(cmp.equals(b, 1, a, 1));
// " a b c" != "ab c"
assertFalse(cmp.equals(a, 2, b, 2));
assertFalse(cmp.equals(b, 2, a, 2));
// "a " == "a"
assertTrue(cmp.equals(a, 3, b, 3));
assertTrue(cmp.equals(b, 3, a, 3));
// " foo" != "foo"
assertFalse(cmp.equals(a, 4, b, 4));
assertFalse(cmp.equals(b, 4, a, 4));
// "a b c" == "a b c "
assertTrue(cmp.equals(a, 5, b, 5));
assertTrue(cmp.equals(b, 5, a, 5));
}
@Test
public void testEqualsWithTabs() {
RawText a = new RawText(
Constants.encodeASCII("a\tb\t \na\tb\t c \n foo\na b\na b"));
RawText b = new RawText(
Constants.encodeASCII("a b \na b c\n\tfoo\nab\na \tb"));
// "a\tb\t \n" == "a b \n"
assertTrue(cmp.equals(a, 0, b, 0));
assertTrue(cmp.equals(b, 0, a, 0));
// "a\tb\t c \n" == "a b c\n"
assertTrue(cmp.equals(a, 1, b, 1));
assertTrue(cmp.equals(b, 1, a, 1));
// " foo" == "\tfoo"
assertTrue(cmp.equals(a, 2, b, 2));
assertTrue(cmp.equals(b, 2, a, 2));
// "a b" != "ab"
assertFalse(cmp.equals(a, 3, b, 3));
assertFalse(cmp.equals(b, 3, a, 3));
// "a b" == "a \tb "
assertTrue(cmp.equals(a, 4, b, 4));
assertTrue(cmp.equals(b, 4, a, 4));
}
@Test
public void testHashCode() {
RawText a = new RawText(Constants
.encodeASCII("a b c\n\nab c d \n\ta bc d\nxyz\na b c"));
RawText b = new RawText(Constants.encodeASCII(
"a b c\na b c\nab c d\na bc d\n \t a bc d\na b c\n"));
// Same line gives equal hash
assertEquals(cmp.hash(a, 0), cmp.hash(a, 0));
// Empty lines produce the same hash
assertEquals(cmp.hash(a, 1), cmp.hash(a, 1));
// Equal lines from different RawTexts get the same hash (RawText
// instance is not part of the hash)
assertEquals(cmp.hash(a, 0), cmp.hash(b, 0));
// A blank produces the same hash as a TAB
assertEquals(cmp.hash(new RawText(Constants.encodeASCII(" ")), 0),
cmp.hash(new RawText(Constants.encodeASCII("\t")), 0));
// Lines with only differing whitespace produce same hash
assertEquals(cmp.hash(a, 0), cmp.hash(b, 1));
// Lines with different trailing whitespace produce the same hash
assertEquals(cmp.hash(a, 2), cmp.hash(b, 2));
// A line with leading whitespace produces a hash different from the
// same line without leading whitespace
assertNotEquals(cmp.hash(a, 3), cmp.hash(b, 3));
// Lines with different leading whitespace produce equal hashes
assertEquals(cmp.hash(a, 3), cmp.hash(b, 4));
// While different lines _should_ produce different hashes, that may not
// always be the case. But for these two lines, it is.
assertNotEquals(cmp.hash(a, 4), cmp.hash(b, 4));
// A line without trailing \n produces the same hash as one without
assertEquals(cmp.hash(a, 5), cmp.hash(b, 5));
}
}
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