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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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