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- /*
- * Copyright (C) 2010, 2020 Google Inc. 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.assertNotNull;
- import static org.junit.Assert.assertNull;
- import static org.junit.Assert.assertTrue;
-
- import java.io.BufferedOutputStream;
- import java.io.ByteArrayOutputStream;
- import java.io.File;
-
- import org.eclipse.jgit.api.Git;
- import org.eclipse.jgit.api.Status;
- import org.eclipse.jgit.diff.DiffEntry.ChangeType;
- import org.eclipse.jgit.dircache.DirCacheIterator;
- import org.eclipse.jgit.junit.RepositoryTestCase;
- import org.eclipse.jgit.junit.TestRepository;
- import org.eclipse.jgit.lib.AnyObjectId;
- import org.eclipse.jgit.lib.ConfigConstants;
- import org.eclipse.jgit.lib.FileMode;
- import org.eclipse.jgit.lib.ObjectId;
- import org.eclipse.jgit.lib.Repository;
- import org.eclipse.jgit.patch.FileHeader;
- import org.eclipse.jgit.patch.HunkHeader;
- import org.eclipse.jgit.revwalk.RevCommit;
- import org.eclipse.jgit.storage.file.FileBasedConfig;
- import org.eclipse.jgit.treewalk.FileTreeIterator;
- import org.eclipse.jgit.treewalk.filter.PathFilter;
- import org.eclipse.jgit.util.FileUtils;
- import org.eclipse.jgit.util.RawParseUtils;
- import org.eclipse.jgit.util.io.DisabledOutputStream;
- import org.junit.After;
- import org.junit.Before;
- import org.junit.Test;
-
- public class DiffFormatterTest extends RepositoryTestCase {
- private static final String DIFF = "diff --git ";
-
- private static final String REGULAR_FILE = "100644";
-
- private static final String GITLINK = "160000";
-
- private static final String PATH_A = "src/a";
-
- private static final String PATH_B = "src/b";
-
- private DiffFormatter df;
-
- private TestRepository<Repository> testDb;
-
- @Override
- @Before
- public void setUp() throws Exception {
- super.setUp();
- testDb = new TestRepository<>(db);
- df = new DiffFormatter(DisabledOutputStream.INSTANCE);
- df.setRepository(db);
- df.setAbbreviationLength(8);
- }
-
- @Override
- @After
- public void tearDown() throws Exception {
- if (df != null) {
- df.close();
- }
- super.tearDown();
- }
-
- @Test
- public void testDefaultRenameDetectorSettings() throws Exception {
- RenameDetector rd = df.getRenameDetector();
- assertNull(rd);
- df.setDetectRenames(true);
- rd = df.getRenameDetector();
- assertNotNull(rd);
- assertEquals(400, rd.getRenameLimit());
- assertEquals(60, rd.getRenameScore());
- }
-
- @Test
- public void testCreateFileHeader_Add() throws Exception {
- ObjectId adId = blob("a\nd\n");
- DiffEntry ent = DiffEntry.add("FOO", adId);
- FileHeader fh = df.toFileHeader(ent);
-
- String diffHeader = "diff --git a/FOO b/FOO\n" //
- + "new file mode " + REGULAR_FILE + "\n"
- + "index "
- + ObjectId.zeroId().abbreviate(8).name()
- + ".."
- + adId.abbreviate(8).name() + "\n" //
- + "--- /dev/null\n"//
- + "+++ b/FOO\n";
- assertEquals(diffHeader, RawParseUtils.decode(fh.getBuffer()));
-
- assertEquals(0, fh.getStartOffset());
- assertEquals(fh.getBuffer().length, fh.getEndOffset());
- assertEquals(FileHeader.PatchType.UNIFIED, fh.getPatchType());
-
- assertEquals(1, fh.getHunks().size());
-
- HunkHeader hh = fh.getHunks().get(0);
- assertEquals(1, hh.toEditList().size());
-
- EditList el = hh.toEditList();
- assertEquals(1, el.size());
-
- Edit e = el.get(0);
- assertEquals(0, e.getBeginA());
- assertEquals(0, e.getEndA());
- assertEquals(0, e.getBeginB());
- assertEquals(2, e.getEndB());
- assertEquals(Edit.Type.INSERT, e.getType());
- }
-
- @Test
- public void testCreateFileHeader_Delete() throws Exception {
- ObjectId adId = blob("a\nd\n");
- DiffEntry ent = DiffEntry.delete("FOO", adId);
- FileHeader fh = df.toFileHeader(ent);
-
- String diffHeader = "diff --git a/FOO b/FOO\n" //
- + "deleted file mode " + REGULAR_FILE + "\n"
- + "index "
- + adId.abbreviate(8).name()
- + ".."
- + ObjectId.zeroId().abbreviate(8).name() + "\n" //
- + "--- a/FOO\n"//
- + "+++ /dev/null\n";
- assertEquals(diffHeader, RawParseUtils.decode(fh.getBuffer()));
-
- assertEquals(0, fh.getStartOffset());
- assertEquals(fh.getBuffer().length, fh.getEndOffset());
- assertEquals(FileHeader.PatchType.UNIFIED, fh.getPatchType());
-
- assertEquals(1, fh.getHunks().size());
-
- HunkHeader hh = fh.getHunks().get(0);
- assertEquals(1, hh.toEditList().size());
-
- EditList el = hh.toEditList();
- assertEquals(1, el.size());
-
- Edit e = el.get(0);
- assertEquals(0, e.getBeginA());
- assertEquals(2, e.getEndA());
- assertEquals(0, e.getBeginB());
- assertEquals(0, e.getEndB());
- assertEquals(Edit.Type.DELETE, e.getType());
- }
-
- @Test
- public void testCreateFileHeader_Modify() throws Exception {
- ObjectId adId = blob("a\nd\n");
- ObjectId abcdId = blob("a\nb\nc\nd\n");
-
- String diffHeader = makeDiffHeader(PATH_A, PATH_A, adId, abcdId);
-
- DiffEntry ad = DiffEntry.delete(PATH_A, adId);
- DiffEntry abcd = DiffEntry.add(PATH_A, abcdId);
-
- DiffEntry mod = DiffEntry.pair(ChangeType.MODIFY, ad, abcd, 0);
-
- FileHeader fh = df.toFileHeader(mod);
-
- assertEquals(diffHeader, RawParseUtils.decode(fh.getBuffer()));
- assertEquals(0, fh.getStartOffset());
- assertEquals(fh.getBuffer().length, fh.getEndOffset());
- assertEquals(FileHeader.PatchType.UNIFIED, fh.getPatchType());
-
- assertEquals(1, fh.getHunks().size());
-
- HunkHeader hh = fh.getHunks().get(0);
- assertEquals(1, hh.toEditList().size());
-
- EditList el = hh.toEditList();
- assertEquals(1, el.size());
-
- Edit e = el.get(0);
- assertEquals(1, e.getBeginA());
- assertEquals(1, e.getEndA());
- assertEquals(1, e.getBeginB());
- assertEquals(3, e.getEndB());
- assertEquals(Edit.Type.INSERT, e.getType());
- }
-
- @Test
- public void testCreateFileHeader_Binary() throws Exception {
- ObjectId adId = blob("a\nd\n");
- ObjectId binId = blob("a\nb\nc\n\0\0\0\0d\n");
-
- String diffHeader = makeDiffHeader(PATH_A, PATH_B, adId, binId)
- + "Binary files differ\n";
-
- DiffEntry ad = DiffEntry.delete(PATH_A, adId);
- DiffEntry abcd = DiffEntry.add(PATH_B, binId);
-
- DiffEntry mod = DiffEntry.pair(ChangeType.MODIFY, ad, abcd, 0);
-
- FileHeader fh = df.toFileHeader(mod);
-
- assertEquals(diffHeader, RawParseUtils.decode(fh.getBuffer()));
- assertEquals(FileHeader.PatchType.BINARY, fh.getPatchType());
-
- assertEquals(1, fh.getHunks().size());
-
- HunkHeader hh = fh.getHunks().get(0);
- assertEquals(0, hh.toEditList().size());
- }
-
- @Test
- public void testCreateFileHeader_GitLink() throws Exception {
- ObjectId aId = blob("a\n");
- ObjectId bId = blob("b\n");
-
- String diffHeader = makeDiffHeaderModeChange(PATH_A, PATH_A, aId, bId,
- GITLINK, REGULAR_FILE);
-
- DiffEntry ad = DiffEntry.delete(PATH_A, aId);
- ad.oldMode = FileMode.GITLINK;
- DiffEntry abcd = DiffEntry.add(PATH_A, bId);
-
- DiffEntry mod = DiffEntry.pair(ChangeType.MODIFY, ad, abcd, 0);
-
- FileHeader fh = df.toFileHeader(mod);
-
- assertEquals(diffHeader, RawParseUtils.decode(fh.getBuffer()));
-
- assertEquals(1, fh.getHunks().size());
-
- HunkHeader hh = fh.getHunks().get(0);
- assertEquals(1, hh.toEditList().size());
- }
-
- @Test
- public void testCreateFileHeader_AddGitLink() throws Exception {
- ObjectId adId = blob("a\nd\n");
- DiffEntry ent = DiffEntry.add("FOO", adId);
- ent.newMode = FileMode.GITLINK;
- FileHeader fh = df.toFileHeader(ent);
-
- String diffHeader = "diff --git a/FOO b/FOO\n" //
- + "new file mode " + GITLINK + "\n"
- + "index "
- + ObjectId.zeroId().abbreviate(8).name()
- + ".."
- + adId.abbreviate(8).name() + "\n" //
- + "--- /dev/null\n"//
- + "+++ b/FOO\n";
- assertEquals(diffHeader, RawParseUtils.decode(fh.getBuffer()));
-
- assertEquals(1, fh.getHunks().size());
- HunkHeader hh = fh.getHunks().get(0);
-
- EditList el = hh.toEditList();
- assertEquals(1, el.size());
-
- Edit e = el.get(0);
- assertEquals(0, e.getBeginA());
- assertEquals(0, e.getEndA());
- assertEquals(0, e.getBeginB());
- assertEquals(1, e.getEndB());
- assertEquals(Edit.Type.INSERT, e.getType());
- }
-
- @Test
- public void testCreateFileHeader_DeleteGitLink() throws Exception {
- ObjectId adId = blob("a\nd\n");
- DiffEntry ent = DiffEntry.delete("FOO", adId);
- ent.oldMode = FileMode.GITLINK;
- FileHeader fh = df.toFileHeader(ent);
-
- String diffHeader = "diff --git a/FOO b/FOO\n" //
- + "deleted file mode " + GITLINK + "\n"
- + "index "
- + adId.abbreviate(8).name()
- + ".."
- + ObjectId.zeroId().abbreviate(8).name() + "\n" //
- + "--- a/FOO\n"//
- + "+++ /dev/null\n";
- assertEquals(diffHeader, RawParseUtils.decode(fh.getBuffer()));
-
- assertEquals(1, fh.getHunks().size());
- HunkHeader hh = fh.getHunks().get(0);
-
- EditList el = hh.toEditList();
- assertEquals(1, el.size());
-
- Edit e = el.get(0);
- assertEquals(0, e.getBeginA());
- assertEquals(1, e.getEndA());
- assertEquals(0, e.getBeginB());
- assertEquals(0, e.getEndB());
- assertEquals(Edit.Type.DELETE, e.getType());
- }
-
- @Test
- public void testCreateFileHeaderWithoutIndexLine() throws Exception {
- DiffEntry m = DiffEntry.modify(PATH_A);
- m.oldMode = FileMode.REGULAR_FILE;
- m.newMode = FileMode.EXECUTABLE_FILE;
-
- FileHeader fh = df.toFileHeader(m);
- String expected = DIFF + "a/src/a b/src/a\n" + //
- "old mode 100644\n" + //
- "new mode 100755\n";
- assertEquals(expected, fh.getScriptText());
- }
-
- @Test
- public void testCreateFileHeaderForRenameWithoutContentChange() throws Exception {
- DiffEntry a = DiffEntry.delete(PATH_A, ObjectId.zeroId());
- DiffEntry b = DiffEntry.add(PATH_B, ObjectId.zeroId());
- DiffEntry m = DiffEntry.pair(ChangeType.RENAME, a, b, 100);
- m.oldId = null;
- m.newId = null;
-
- FileHeader fh = df.toFileHeader(m);
- String expected = DIFF + "a/src/a b/src/b\n" + //
- "similarity index 100%\n" + //
- "rename from src/a\n" + //
- "rename to src/b\n";
- assertEquals(expected, fh.getScriptText());
- }
-
- @Test
- public void testCreateFileHeaderForRenameModeChange()
- throws Exception {
- DiffEntry a = DiffEntry.delete(PATH_A, ObjectId.zeroId());
- DiffEntry b = DiffEntry.add(PATH_B, ObjectId.zeroId());
- b.oldMode = FileMode.REGULAR_FILE;
- b.newMode = FileMode.EXECUTABLE_FILE;
- DiffEntry m = DiffEntry.pair(ChangeType.RENAME, a, b, 100);
- m.oldId = null;
- m.newId = null;
-
- FileHeader fh = df.toFileHeader(m);
- //@formatter:off
- String expected = DIFF + "a/src/a b/src/b\n" +
- "old mode 100644\n" +
- "new mode 100755\n" +
- "similarity index 100%\n" +
- "rename from src/a\n" +
- "rename to src/b\n";
- //@formatter:on
- assertEquals(expected, fh.getScriptText());
- }
-
- @Test
- public void testDiff() throws Exception {
- write(new File(db.getDirectory().getParent(), "test.txt"), "test");
- File folder = new File(db.getDirectory().getParent(), "folder");
- FileUtils.mkdir(folder);
- write(new File(folder, "folder.txt"), "folder");
- try (Git git = new Git(db);
- ByteArrayOutputStream os = new ByteArrayOutputStream();
- DiffFormatter dfmt = new DiffFormatter(new BufferedOutputStream(os))) {
- git.add().addFilepattern(".").call();
- git.commit().setMessage("Initial commit").call();
- write(new File(folder, "folder.txt"), "folder change");
- dfmt.setRepository(db);
- dfmt.setPathFilter(PathFilter.create("folder"));
- DirCacheIterator oldTree = new DirCacheIterator(db.readDirCache());
- FileTreeIterator newTree = new FileTreeIterator(db);
-
- dfmt.format(oldTree, newTree);
- dfmt.flush();
-
- String actual = os.toString("UTF-8");
- String expected =
- "diff --git a/folder/folder.txt b/folder/folder.txt\n"
- + "index 0119635..95c4c65 100644\n"
- + "--- a/folder/folder.txt\n" + "+++ b/folder/folder.txt\n"
- + "@@ -1 +1 @@\n" + "-folder\n"
- + "\\ No newline at end of file\n" + "+folder change\n"
- + "\\ No newline at end of file\n";
-
- assertEquals(expected, actual);
- }
- }
-
- @Test
- public void testDiffRootNullToTree() throws Exception {
- write(new File(db.getDirectory().getParent(), "test.txt"), "test");
- File folder = new File(db.getDirectory().getParent(), "folder");
- FileUtils.mkdir(folder);
- write(new File(folder, "folder.txt"), "folder");
- try (Git git = new Git(db);
- ByteArrayOutputStream os = new ByteArrayOutputStream();
- DiffFormatter dfmt = new DiffFormatter(new BufferedOutputStream(os))) {
- git.add().addFilepattern(".").call();
- RevCommit commit = git.commit().setMessage("Initial commit").call();
- write(new File(folder, "folder.txt"), "folder change");
-
- dfmt.setRepository(db);
- dfmt.setPathFilter(PathFilter.create("folder"));
- dfmt.format(null, commit.getTree().getId());
- dfmt.flush();
-
- String actual = os.toString("UTF-8");
- String expected = "diff --git a/folder/folder.txt b/folder/folder.txt\n"
- + "new file mode 100644\n"
- + "index 0000000..0119635\n"
- + "--- /dev/null\n"
- + "+++ b/folder/folder.txt\n"
- + "@@ -0,0 +1 @@\n"
- + "+folder\n"
- + "\\ No newline at end of file\n";
-
- assertEquals(expected, actual);
- }
- }
-
- @Test
- public void testDiffRootTreeToNull() throws Exception {
- write(new File(db.getDirectory().getParent(), "test.txt"), "test");
- File folder = new File(db.getDirectory().getParent(), "folder");
- FileUtils.mkdir(folder);
- write(new File(folder, "folder.txt"), "folder");
- try (Git git = new Git(db);
- ByteArrayOutputStream os = new ByteArrayOutputStream();
- DiffFormatter dfmt = new DiffFormatter(new BufferedOutputStream(os));) {
- git.add().addFilepattern(".").call();
- RevCommit commit = git.commit().setMessage("Initial commit").call();
- write(new File(folder, "folder.txt"), "folder change");
-
- dfmt.setRepository(db);
- dfmt.setPathFilter(PathFilter.create("folder"));
- dfmt.format(commit.getTree().getId(), null);
- dfmt.flush();
-
- String actual = os.toString("UTF-8");
- String expected = "diff --git a/folder/folder.txt b/folder/folder.txt\n"
- + "deleted file mode 100644\n"
- + "index 0119635..0000000\n"
- + "--- a/folder/folder.txt\n"
- + "+++ /dev/null\n"
- + "@@ -1 +0,0 @@\n"
- + "-folder\n"
- + "\\ No newline at end of file\n";
-
- assertEquals(expected, actual);
- }
- }
-
- @Test
- public void testDiffNullToNull() throws Exception {
- try (ByteArrayOutputStream os = new ByteArrayOutputStream();
- DiffFormatter dfmt = new DiffFormatter(new BufferedOutputStream(os))) {
- dfmt.setRepository(db);
- dfmt.format((AnyObjectId) null, null);
- dfmt.flush();
-
- String actual = os.toString("UTF-8");
- String expected = "";
-
- assertEquals(expected, actual);
- }
- }
-
- @Test
- public void testTrackedFileInIgnoredFolderUnchanged()
- throws Exception {
- commitFile("empty/empty/foo", "", "master");
- commitFile(".gitignore", "empty/*", "master");
- try (Git git = new Git(db)) {
- Status status = git.status().call();
- assertTrue(status.isClean());
- }
- try (ByteArrayOutputStream os = new ByteArrayOutputStream();
- DiffFormatter dfmt = new DiffFormatter(os)) {
- dfmt.setRepository(db);
- dfmt.format(new DirCacheIterator(db.readDirCache()),
- new FileTreeIterator(db));
- dfmt.flush();
-
- String actual = os.toString("UTF-8");
-
- assertEquals("", actual);
- }
- }
-
- @Test
- public void testTrackedFileInIgnoredFolderChanged()
- throws Exception {
- String expectedDiff = "diff --git a/empty/empty/foo b/empty/empty/foo\n"
- + "index e69de29..5ea2ed4 100644\n" //
- + "--- a/empty/empty/foo\n" //
- + "+++ b/empty/empty/foo\n" //
- + "@@ -0,0 +1 @@\n" //
- + "+changed\n";
-
- commitFile("empty/empty/foo", "", "master");
- commitFile(".gitignore", "empty/*", "master");
- try (Git git = new Git(db)) {
- Status status = git.status().call();
- assertTrue(status.isClean());
- }
- try (ByteArrayOutputStream os = new ByteArrayOutputStream();
- DiffFormatter dfmt = new DiffFormatter(os)) {
- writeTrashFile("empty/empty/foo", "changed\n");
- dfmt.setRepository(db);
- dfmt.format(new DirCacheIterator(db.readDirCache()),
- new FileTreeIterator(db));
- dfmt.flush();
-
- String actual = os.toString("UTF-8");
-
- assertEquals(expectedDiff, actual);
- }
- }
-
- @Test
- public void testDiffAutoCrlfSmallFile() throws Exception {
- String content = "01234\r\n01234\r\n01234\r\n";
- String expectedDiff = "diff --git a/test.txt b/test.txt\n"
- + "index fe25983..a44a032 100644\n" //
- + "--- a/test.txt\n" //
- + "+++ b/test.txt\n" //
- + "@@ -1,3 +1,4 @@\n" //
- + " 01234\n" //
- + "+ABCD\n" //
- + " 01234\n" //
- + " 01234\n";
- doAutoCrLfTest(content, expectedDiff);
- }
-
- @Test
- public void testDiffAutoCrlfMediumFile() throws Exception {
- String content = mediumCrLfString();
- String expectedDiff = "diff --git a/test.txt b/test.txt\n"
- + "index 215c502..c10f08c 100644\n" //
- + "--- a/test.txt\n" //
- + "+++ b/test.txt\n" //
- + "@@ -1,4 +1,5 @@\n" //
- + " 01234567\n" //
- + "+ABCD\n" //
- + " 01234567\n" //
- + " 01234567\n" //
- + " 01234567\n";
- doAutoCrLfTest(content, expectedDiff);
- }
-
- @Test
- public void testDiffAutoCrlfLargeFile() throws Exception {
- String content = largeCrLfString();
- String expectedDiff = "diff --git a/test.txt b/test.txt\n"
- + "index 7014942..c0487a7 100644\n" //
- + "--- a/test.txt\n" //
- + "+++ b/test.txt\n" //
- + "@@ -1,4 +1,5 @@\n"
- + " 012345678901234567890123456789012345678901234567\n"
- + "+ABCD\n"
- + " 012345678901234567890123456789012345678901234567\n"
- + " 012345678901234567890123456789012345678901234567\n"
- + " 012345678901234567890123456789012345678901234567\n";
- doAutoCrLfTest(content, expectedDiff);
- }
-
- private void doAutoCrLfTest(String content, String expectedDiff)
- throws Exception {
- FileBasedConfig config = db.getConfig();
- config.setString(ConfigConstants.CONFIG_CORE_SECTION, null,
- ConfigConstants.CONFIG_KEY_AUTOCRLF, "true");
- config.save();
- commitFile("test.txt", content, "master");
- // Insert a line into content
- int i = content.indexOf('\n');
- content = content.substring(0, i + 1) + "ABCD\r\n"
- + content.substring(i + 1);
- writeTrashFile("test.txt", content);
- // Create the patch
- try (ByteArrayOutputStream os = new ByteArrayOutputStream();
- DiffFormatter dfmt = new DiffFormatter(
- new BufferedOutputStream(os))) {
- dfmt.setRepository(db);
- dfmt.format(new DirCacheIterator(db.readDirCache()),
- new FileTreeIterator(db));
- dfmt.flush();
-
- String actual = os.toString("UTF-8");
-
- assertEquals(expectedDiff, actual);
- }
- }
-
- private static String largeCrLfString() {
- String line = "012345678901234567890123456789012345678901234567\r\n";
- StringBuilder builder = new StringBuilder(
- 2 * RawText.FIRST_FEW_BYTES);
- while (builder.length() < 2 * RawText.FIRST_FEW_BYTES) {
- builder.append(line);
- }
- return builder.toString();
- }
-
- private static String mediumCrLfString() {
- // Create a CR-LF string longer than RawText.FIRST_FEW_BYTES whose
- // canonical representation is shorter than RawText.FIRST_FEW_BYTES.
- String line = "01234567\r\n"; // 10 characters
- StringBuilder builder = new StringBuilder(
- RawText.FIRST_FEW_BYTES + line.length());
- while (builder.length() <= RawText.FIRST_FEW_BYTES) {
- builder.append(line);
- }
- return builder.toString();
- }
-
- private static String makeDiffHeader(String pathA, String pathB,
- ObjectId aId,
- ObjectId bId) {
- String a = aId.abbreviate(8).name();
- String b = bId.abbreviate(8).name();
- return DIFF + "a/" + pathA + " " + "b/" + pathB + "\n" + //
- "index " + a + ".." + b + " " + REGULAR_FILE + "\n" + //
- "--- a/" + pathA + "\n" + //
- "+++ b/" + pathB + "\n";
- }
-
- private static String makeDiffHeaderModeChange(String pathA, String pathB,
- ObjectId aId, ObjectId bId, String modeA, String modeB) {
- String a = aId.abbreviate(8).name();
- String b = bId.abbreviate(8).name();
- return DIFF + "a/" + pathA + " " + "b/" + pathB + "\n" + //
- "old mode " + modeA + "\n" + //
- "new mode " + modeB + "\n" + //
- "index " + a + ".." + b + "\n" + //
- "--- a/" + pathA + "\n" + //
- "+++ b/" + pathB + "\n";
- }
-
- private ObjectId blob(String content) throws Exception {
- return testDb.blob(content).copy();
- }
- }
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