/*
 * Copyright (c) 2011-2013 TMate Software Ltd
 *  
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; version 2 of the License.
 *
 * 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 General Public License for more details.
 *
 * For information on how to redistribute this software under
 * the terms of a license other than GNU General Public License
 * contact TMate Software at support@hg4j.com
 */
package org.tmatesoft.hg.test;

import static org.hamcrest.CoreMatchers.equalTo;
import static org.junit.Assert.*;
import static org.tmatesoft.hg.core.HgStatus.Kind.*;
import static org.tmatesoft.hg.repo.HgRepository.TIP;
import static org.tmatesoft.hg.repo.HgRepository.WORKING_COPY;

import java.io.File;
import java.util.ArrayList;
import java.util.Collection;
import java.util.Collections;
import java.util.HashMap;
import java.util.LinkedHashMap;
import java.util.LinkedList;
import java.util.List;
import java.util.Map;
import java.util.TreeMap;

import org.junit.Assume;
import org.junit.Ignore;
import org.junit.Rule;
import org.junit.Test;
import org.tmatesoft.hg.core.HgStatus;
import org.tmatesoft.hg.core.HgStatus.Kind;
import org.tmatesoft.hg.core.HgStatusCommand;
import org.tmatesoft.hg.core.HgStatusHandler;
import org.tmatesoft.hg.internal.PathGlobMatcher;
import org.tmatesoft.hg.repo.HgLookup;
import org.tmatesoft.hg.repo.HgRepository;
import org.tmatesoft.hg.repo.HgStatusCollector;
import org.tmatesoft.hg.repo.HgWorkingCopyStatusCollector;
import org.tmatesoft.hg.util.Path;
import org.tmatesoft.hg.util.Outcome;

/**
 * 
 * @author Artem Tikhomirov
 * @author TMate Software Ltd.
 */
public class TestStatus {

	@Rule
	public ErrorCollectorExt errorCollector = new ErrorCollectorExt();

	private HgRepository repo;
	private StatusOutputParser statusParser;
	private ExecHelper eh;
	private StatusReporter sr;

	public static void main(String[] args) throws Throwable {
		TestStatus test = new TestStatus();
		test.testLowLevel();
		test.testStatusCommand();
		test.testPerformance();
		test.errorCollector.verify();
		//
		TestStatus t2 = new TestStatus(new HgLookup().detect("/temp/hg/hg4j-merging/hg4j"));
		t2.testDirstateParentOtherThanTipWithUpdate();
		t2.errorCollector.verify();
		TestStatus t3 = new TestStatus(new HgLookup().detect("/temp/hg/cpython"));
		t3.testDirstateParentOtherThanTipNoUpdate();
		t3.errorCollector.verify();
	}

	public TestStatus() throws Exception {
		this(new HgLookup().detectFromWorkingDir());
	}

	private TestStatus(HgRepository hgRepo) {
		repo = hgRepo;
		Assume.assumeTrue(!repo.isInvalid());
		statusParser = new StatusOutputParser();
		eh = new ExecHelper(statusParser, hgRepo.getWorkingDir());
		sr = new StatusReporter(errorCollector, statusParser);
	}

	@Test
	public void testLowLevel() throws Exception {
		final HgWorkingCopyStatusCollector wcc = new HgWorkingCopyStatusCollector(repo);
		statusParser.reset();
		eh.run("hg", "status", "-A");
		HgStatusCollector.Record r = wcc.status(HgRepository.TIP);
		sr.report("hg status -A", r);
		//
		statusParser.reset();
		int revision = 3;
		eh.run("hg", "status", "-A", "--rev", String.valueOf(revision));
		r = wcc.status(revision);
		sr.report("status -A --rev " + revision, r);
		//
		statusParser.reset();
		eh.run("hg", "status", "-A", "--change", String.valueOf(revision));
		r = new HgStatusCollector.Record();
		new HgStatusCollector(repo).change(revision, r);
		sr.report("status -A --change " + revision, r);
		//
		statusParser.reset();
		int rev2 = 80;
		final String range = String.valueOf(revision) + ":" + String.valueOf(rev2);
		eh.run("hg", "status", "-A", "--rev", range);
		r = new HgStatusCollector(repo).status(revision, rev2);
		sr.report("Status -A -rev " + range, r);
	}

	/**
	 * hg up --rev <earlier rev>; hg status
	 * 
	 * To check if HgWorkingCopyStatusCollector respects actual working copy parent (takes from dirstate)
	 * and if status is calculated correctly
	 */
	@Test
	@Ignore("modifies test repository, needs careful configuration")
	public void testDirstateParentOtherThanTipWithUpdate() throws Exception {
		int revToUpdate = 238;
		try {
			eh.run("hg", "up", "--rev", String.valueOf(revToUpdate));
			testDirstateParentOtherThanTipNoUpdate();
		} finally {
			eh.run("hg", "up");
		}
	}

	@Test
	@Ignore("needs configuration as it requires special repository")
	public void testDirstateParentOtherThanTipNoUpdate() throws Exception {
		final HgWorkingCopyStatusCollector wcc = new HgWorkingCopyStatusCollector(repo);
		statusParser.reset();
		//
		eh.run("hg", "status", "-A");
		HgStatusCollector.Record r = wcc.status(HgRepository.TIP);
		sr.report("hg status -A", r);
		//
		statusParser.reset();
		int revision = 3;
		eh.run("hg", "status", "-A", "--rev", String.valueOf(revision));
		r = wcc.status(revision);
		sr.report("status -A --rev " + revision, r);
	}

	@Test
	public void testStatusCommand() throws Exception {
		final HgStatusCommand sc = new HgStatusCommand(repo).all();
		StatusCollector r;
		statusParser.reset();
		eh.run("hg", "status", "-A");
		sc.execute(r = new StatusCollector());
		sr.report("hg status -A", r);
		//
		statusParser.reset();
		int revision = 3;
		eh.run("hg", "status", "-A", "--rev", String.valueOf(revision));
		sc.base(revision).execute(r = new StatusCollector());
		sr.report("status -A --rev " + revision, r);
		//
		statusParser.reset();
		eh.run("hg", "status", "-A", "--change", String.valueOf(revision));
		sc.base(TIP).revision(revision).execute(r = new StatusCollector());
		sr.report("status -A --change " + revision, r);

		// TODO check not -A, but defaults()/custom set of modifications 
	}

	static class StatusCollector implements HgStatusHandler {
		private final Map<Kind, List<Path>> kind2names = new TreeMap<Kind, List<Path>>();
		private final Map<Path, List<Kind>> name2kinds = new TreeMap<Path, List<Kind>>();
		private final Map<Path, Outcome> name2error = new LinkedHashMap<Path, Outcome>();
		private final Map<Path, Path> new2oldName = new LinkedHashMap<Path, Path>();

		public void status(HgStatus s) {
			List<Path> l = kind2names.get(s.getKind());
			if (l == null) {
				kind2names.put(s.getKind(), l = new LinkedList<Path>());
			}
			l.add(s.getPath());
			if (s.isCopy()) {
				new2oldName.put(s.getPath(), s.getOriginalPath());
			}
			//
			List<Kind> k = name2kinds.get(s.getPath());
			if (k == null) {
				name2kinds.put(s.getPath(), k = new LinkedList<Kind>());
			}
			k.add(s.getKind());
		}

		public void error(Path file, Outcome s) {
			name2error.put(file, s);
		}

		public List<Path> get(Kind k) {
			List<Path> rv = kind2names.get(k);
			return rv == null ? Collections.<Path> emptyList() : rv;
		}

		public List<Kind> get(Path p) {
			List<Kind> rv = name2kinds.get(p);
			return rv == null ? Collections.<Kind> emptyList() : rv;
		}

		public Map<Path, Outcome> getErrors() {
			return name2error;
		}

		public HgStatusCollector.Record asStatusRecord() {
			HgStatusCollector.Record rv = new HgStatusCollector.Record();
			for (Path p : get(Modified)) {
				rv.modified(p);
			}
			for (Path p : get(Added)) {
				if (!new2oldName.containsKey(p)) {
					// new files that are result of a copy get reported separately, below
					rv.added(p);
				}
			}
			for (Path p : get(Removed)) {
				rv.removed(p);
			}
			for (Path p : get(Clean)) {
				rv.clean(p);
			}
			for (Path p : get(Ignored)) {
				rv.ignored(p);
			}
			for (Path p : get(Missing)) {
				rv.missing(p);
			}
			for (Path p : get(Unknown)) {
				rv.unknown(p);
			}
			for (Map.Entry<Path, Path> e : new2oldName.entrySet()) {
				rv.copied(e.getValue(), e.getKey());
			}
			return rv;
		}
	}

	/*
	 * status-1/dir/file5 was added in rev 8, scheduled (hg remove file5) for removal, but not yet committed
	 * Erroneously reported extra REMOVED file (the one added and removed in between). Shall not
	 */
	@Test
	public void testRemovedAgainstBaseWithoutIt() throws Exception {
		// check very end of WCStatusCollector, foreach left knownEntry, collect == null || baseRevFiles.contains()
		repo = Configuration.get().find("status-1");
		HgStatusCommand cmd = new HgStatusCommand(repo);
		StatusCollector sc = new StatusCollector();
		cmd.all().base(7).execute(sc);
		assertTrue(sc.getErrors().isEmpty());
		Path file5 = Path.create("dir/file5");
		// shall not be listed at all
		assertTrue(sc.get(file5).isEmpty());
	}

	/*
	 * status-1/file2 is tracked, but later .hgignore got entry to ignore it, file2 got modified
	 * HG doesn't respect .hgignore for tracked files.
	 * Now reported as ignored and missing(?!).
	 * Shall be reported as modified.
	 */
	@Test
	public void testTrackedModifiedIgnored() throws Exception {
		repo = Configuration.get().find("status-1");
		HgStatusCommand cmd = new HgStatusCommand(repo);
		StatusCollector sc = new StatusCollector();
		cmd.all().execute(sc);
		assertTrue(sc.getErrors().isEmpty());
		final Path file2 = Path.create("file2");
		assertTrue(sc.get(file2).contains(Modified));
		assertTrue(sc.get(file2).size() == 1);
	}

	/*
	 * status/dir/file4, added in rev 3, has been scheduled for removal (hg remove -Af file4), but still there in the WC.
	 * Shall be reported as Removed, when comparing against rev 3
	 * (despite both rev 3 and WC's parent has file4, there are different paths in the code for wc against parent and wc against rev)
	 */
	@Test
	public void testMarkedRemovedButStillInWC() throws Exception {
		repo = Configuration.get().find("status-1");
		HgStatusCommand cmd = new HgStatusCommand(repo);
		StatusCollector sc = new StatusCollector();
		cmd.all().execute(sc);
		assertTrue(sc.getErrors().isEmpty());
		Path file4 = Path.create("dir/file4");
		assertTrue(sc.get(file4).contains(Removed));
		assertTrue(sc.get(file4).size() == 1);
		//
		// different code path (collect != null)
		cmd.base(3).execute(sc = new StatusCollector());
		assertTrue(sc.getErrors().isEmpty());
		assertTrue(sc.get(file4).contains(Removed));
		assertTrue(sc.get(file4).size() == 1);
		//
		// wasn't there in rev 2, shall not be reported at all
		cmd.base(2).execute(sc = new StatusCollector());
		assertTrue(sc.getErrors().isEmpty());
		assertTrue(sc.get(file4).isEmpty());
	}

	/*
	 * status-1/dir/file3 tracked, listed in .hgignore since rev 4, removed (hg remove file3) from repo and WC
	 * (but entry in .hgignore left) in revision 5, and new file3 got created in WC.
	 * Shall be reported as ignored when comparing against WC's parent,
	 * and both ignored and removed when comparing against revision 3
	 */
	@Test
	public void testRemovedIgnoredInWC() throws Exception {
		// check branch !known, ignored
		repo = Configuration.get().find("status-1");
		HgStatusCommand cmd = new HgStatusCommand(repo);
		StatusCollector sc = new StatusCollector();
		cmd.all().execute(sc);
		assertTrue(sc.getErrors().isEmpty());
		final Path file3 = Path.create("dir/file3");
		assertTrue(sc.get(file3).contains(Ignored));
		assertTrue(sc.get(file3).size() == 1);
		//
		cmd.base(3).execute(sc = new StatusCollector());
		assertTrue(sc.getErrors().isEmpty());
		assertTrue(sc.get(file3).contains(Ignored));
		assertTrue(sc.get(file3).contains(Removed));
		assertTrue(sc.get(file3).size() == 2);
		//
		cmd.base(5).execute(sc = new StatusCollector());
		assertTrue(sc.getErrors().isEmpty());
		assertTrue(sc.get(file3).contains(Ignored));
		assertTrue(sc.get(file3).size() == 1);
		//
		cmd.base(0).execute(sc = new StatusCollector());
		assertTrue(sc.getErrors().isEmpty());
		assertTrue(sc.get(file3).contains(Ignored));
		assertTrue(sc.get(file3).size() == 1);

	}

	/*
	 * status/file1 was removed in cset 2. New file with the same name in the WC.
	 * Shall report 2 statuses (as cmdline hg does): unknown and removed when comparing against that revision.
	 */
	@Test
	public void testNewFileWithSameNameAsDeletedOld() throws Exception {
		// check branch !known, !ignored (=> unknown)
		repo = Configuration.get().find("status-1");
		HgStatusCommand cmd = new HgStatusCommand(repo);
		StatusCollector sc = new StatusCollector();
		cmd.base(1);
		cmd.all().execute(sc);
		assertTrue(sc.getErrors().isEmpty());
		final Path file1 = Path.create("file1");
		assertTrue(sc.get(file1).contains(Unknown));
		assertTrue(sc.get(file1).contains(Removed));
		assertTrue(sc.get(file1).size() == 2);
		// 
		// no file1 in rev 2, shall be reported as unknown only
		cmd.base(2).execute(sc = new StatusCollector());
		assertTrue(sc.getErrors().isEmpty());
		assertTrue(sc.get(file1).contains(Unknown));
		assertTrue(sc.get(file1).size() == 1);
	}

	@Test
	public void testSubTreeStatus() throws Exception {
		repo = Configuration.get().find("status-1");
		HgStatusCommand cmd = new HgStatusCommand(repo);
		StatusCollector sc = new StatusCollector();
		cmd.match(new PathGlobMatcher("*"));
		cmd.all().execute(sc);
		assertTrue(sc.getErrors().isEmpty());
		/*
		 * C .hgignore
		 * ? file1
		 * M file2
		 * C readme
		 */
		final Path file1 = Path.create("file1");
		assertTrue(sc.get(file1).contains(Unknown));
		assertTrue(sc.get(file1).size() == 1);
		assertTrue(sc.get(Removed).isEmpty());
		assertTrue(sc.get(Clean).size() == 2);
		assertTrue(sc.get(Modified).size() == 1);
		//
		cmd.match(new PathGlobMatcher("dir/*")).execute(sc = new StatusCollector());
		assertTrue(sc.getErrors().isEmpty());
		/*
		 * I dir/file3
		 * R dir/file4
		 * R dir/file5
		 */
		assertTrue(sc.get(Modified).isEmpty());
		assertTrue(sc.get(Added).isEmpty());
		assertTrue(sc.get(Ignored).size() == 1);
		assertTrue(sc.get(Removed).size() == 2);
	}

	@Test
	public void testSpecificFileStatus() throws Exception {
		repo = Configuration.get().find("status-1");
		// files only
		final Path file2 = Path.create("file2");
		final Path file3 = Path.create("dir/file3");
		HgWorkingCopyStatusCollector sc = HgWorkingCopyStatusCollector.create(repo, file2, file3);
		HgStatusCollector.Record r = new HgStatusCollector.Record();
		sc.walk(WORKING_COPY, r);
		assertTrue(r.getAdded().isEmpty());
		assertTrue(r.getRemoved().isEmpty());
		assertTrue(r.getUnknown().isEmpty());
		assertTrue(r.getClean().isEmpty());
		assertTrue(r.getMissing().isEmpty());
		assertTrue(r.getCopied().isEmpty());
		assertTrue(r.getIgnored().contains(file3));
		assertTrue(r.getIgnored().size() == 1);
		assertTrue(r.getModified().contains(file2));
		assertTrue(r.getModified().size() == 1);
		// mix files and directories
		final Path readme = Path.create("readme");
		final Path dir = Path.create("dir/");
		sc = HgWorkingCopyStatusCollector.create(repo, readme, dir);
		sc.walk(WORKING_COPY, r = new HgStatusCollector.Record());
		assertTrue(r.getAdded().isEmpty());
		assertTrue(r.getRemoved().size() == 2);
		for (Path p : r.getRemoved()) {
			assertEquals(Path.CompareResult.ImmediateChild, p.compareWith(dir));
		}
		assertTrue(r.getUnknown().isEmpty());
		assertTrue(r.getClean().size() == 1);
		assertTrue(r.getClean().contains(readme));
		assertTrue(r.getMissing().isEmpty());
		assertTrue(r.getCopied().isEmpty());
		assertTrue(r.getIgnored().contains(file3));
		assertTrue(r.getIgnored().size() == 1);
		assertTrue(r.getModified().isEmpty());
	}

	@Test
	public void testSameResultDirectPathVsMatcher() throws Exception {
		repo = Configuration.get().find("status-1");
		final Path file3 = Path.create("dir/file3");
		final Path file5 = Path.create("dir/file5");

		HgWorkingCopyStatusCollector sc = HgWorkingCopyStatusCollector.create(repo, file3, file5);
		HgStatusCollector.Record r;
		sc.walk(WORKING_COPY, r = new HgStatusCollector.Record());
		assertTrue(r.getRemoved().contains(file5));
		assertTrue(r.getIgnored().contains(file3));
		//
		// query for the same file, but with
		sc = HgWorkingCopyStatusCollector.create(repo, new PathGlobMatcher(file3.toString(), file5.toString()));
		sc.walk(WORKING_COPY, r = new HgStatusCollector.Record());
		assertTrue(r.getRemoved().contains(file5));
		assertTrue(r.getIgnored().contains(file3));
	}

	@Test
	public void testScopeInHistoricalStatus() throws Exception {
		repo = Configuration.get().find("status-1");
		HgStatusCommand cmd = new HgStatusCommand(repo);
		cmd.base(3).revision(8).all();
		cmd.match(new PathGlobMatcher("dir/*"));
		StatusCollector sc = new StatusCollector();
		cmd.execute(sc);
		assertTrue(sc.getErrors().isEmpty());
		final Path file3 = Path.create("dir/file3");
		final Path file4 = Path.create("dir/file4");
		final Path file5 = Path.create("dir/file5");
		//
		assertTrue(sc.get(file3).contains(Removed));
		assertTrue(sc.get(file3).size() == 1);
		assertTrue(sc.get(Removed).size() == 1);
		//
		assertTrue(sc.get(file4).contains(Clean));
		assertTrue(sc.get(file4).size() == 1);
		assertTrue(sc.get(Clean).size() == 1);
		//
		assertTrue(sc.get(file5).contains(Added));
		assertTrue(sc.get(file5).size() == 1);
		assertTrue(sc.get(Added).size() == 1);

	}

	/**
	 * Issue 22
	 */
	@Test
	public void testOnEmptyRepositoryWithAllFilesDeleted() throws Exception {
		repo = Configuration.get().find("status-2");
		HgStatusCommand cmd = new HgStatusCommand(repo);
		cmd.all();
		StatusCollector sc = new StatusCollector();
		cmd.execute(sc);
		// shall pass without exception
		assertTrue(sc.getErrors().isEmpty());
		for (HgStatus.Kind k : HgStatus.Kind.values()) {
			assertTrue("Kind " + k.name() + " shall be empty", sc.get(k).isEmpty());
		}
	}

	/**
	 * Issue 22, two subsequent commits that remove all repository files, each in a different branch.
	 * Here's excerpt from my RevlogWriter utility:
	 * 
	 * <pre>
	 * 		final List<String> filesList = Collections.singletonList("file1");
	 * //
	 * file1.writeUncompressed(-1, -1, 0, 0, "garbage".getBytes());
	 * //
	 * ManifestBuilder mb = new ManifestBuilder();
	 * mb.reset().add("file1", file1.getRevision(0));
	 * manifest.writeUncompressed(-1, -1, 0, 0, mb.build()); // manifest revision 0
	 * final byte[] cset1 = buildChangelogEntry(manifest.getRevision(0), Collections.<String, String>emptyMap(), filesList, "Add a file");
	 * changelog.writeUncompressed(-1, -1, 0, 0, cset1);
	 * //
	 * // pretend we delete all files in a branch 1
	 * manifest.writeUncompressed(0, -1, 1, 1, new byte[0]); // manifest revision 1
	 * final byte[] cset2 = buildChangelogEntry(manifest.getRevision(1), Collections.singletonMap("branch", "delete-all-1"), filesList, "Delete all files in a first branch");
	 *  changelog.writeUncompressed(0, -1, 1, 1, cset2);
	 * //
	 * // pretend we delete all files in a branch 2 (which is based on revision 0, same as branch 1)
	 * manifest.writeUncompressed(1, -1, 1 /*!!! here comes baseRevision != index * /, 2, new byte[0]); // manifest revision 2
	 * final byte[] cset3 = buildChangelogEntry(manifest.getRevision(2), Collections.singletonMap("branch", "delete-all-2"), filesList, "Again delete all files but in another branch");
	 * changelog.writeUncompressed(0, -1, 2, 2, cset3);
	 * </pre>
	 */
	@Test
	public void testOnEmptyRepositoryWithAllFilesDeletedInBranch() throws Exception {
		repo = Configuration.get().find("status-3");
		HgStatusCommand cmd = new HgStatusCommand(repo);
		cmd.all();
		StatusCollector sc = new StatusCollector();
		cmd.execute(sc);
		// shall pass without exception
		assertTrue(sc.getErrors().isEmpty());
		for (HgStatus.Kind k : HgStatus.Kind.values()) {
			assertTrue("Kind " + k.name() + " shall be empty", sc.get(k).isEmpty());
		}
	}

	/**
	 * Issue 23: HgInvalidRevisionException for svn imported repository (changeset 0 references nullid manifest)
	 */
	@Test
	public void testImportedRepoWithOddManifestRevisions() throws Exception {
		repo = Configuration.get().find("status-4");
		HgStatusCommand cmd = new HgStatusCommand(repo);
		cmd.all();
		StatusCollector sc = new StatusCollector();
		cmd.execute(sc);
		// shall pass without exception
		assertTrue(sc.getErrors().isEmpty());
	}

	/**
	 * Issue 24: IllegalArgumentException in FilterDataAccess
	 * There were two related defects in RevlogStream
	 * a) for compressedLen == 0, a byte was read and FilterDataAccess (of length 0, but it didn't help too much) was created - first byte happen to be 0.
	 * Patch was not applied (userDataAccess.isEmpty() check thanks to Issue 22)
	 * b) That FilterDataAccess (with 0 size represents patch more or less relevantly, but didn't represent actual revision) get successfully
	 * reassigned as lastUserData for the next iteration. And at the next step attempt to apply patch recorded in the next revision failed
	 * because baseRevisionData is 0 length FilterDataAccess
	 * 
	 * Same applies for
	 * Issue 25: IOException: Underflow. Rewind past end of the slice in InflaterDataAccess
	 * with the difference in separate .i and .d (thus not 0 but 'x' first byte was read)
	 * 
	 * Sample:
	 * status-5/file1 has 3 revisions, second is zero-length patch:
	 * Index Offset Packed Actual Base Rev
	 * 0: 0 8 7 0
	 * DATA
	 * 1: 8 0 7 0
	 * NO DATA
	 * 2: 8 14 6 0
	 * PATCH
	 */
	@Test
	public void testZeroLengthPatchAgainstNonEmptyBaseRev() throws Exception {
		repo = Configuration.get().find("status-5");
		// pretend we modified files in the working copy
		// for HgWorkingCopyStatusCollector to go and retrieve its content from repository 
		File f1 = new File(repo.getWorkingDir(), "file1");
		f1.setLastModified(System.currentTimeMillis());
		File f3 = new File(repo.getWorkingDir(), "file3");
		f3.setLastModified(System.currentTimeMillis());
		//
		HgStatusCommand cmd = new HgStatusCommand(repo);
		cmd.all();
		StatusCollector sc = new StatusCollector();
		cmd.execute(sc);
		// shall pass without exception
		//
		for (Map.Entry<Path, Outcome> e : sc.getErrors().entrySet()) {
			System.out.printf("%s : (%s %s)\n", e.getKey(), e.getValue().getKind(), e.getValue().getMessage());
		}
		assertTrue(sc.getErrors().isEmpty());
	}

	/**
	 * Issue 26: UnsupportedOperationException when patching empty base revision
	 * 
	 * Sample:
	 * status-5/file2 has 3 revisions, second is patch (complete revision content in a form of the patch) for empty base revision:
	 * Index Offset Packed Actual Base Rev
	 * 0: 0 0 0 0
	 * NO DATA
	 * 1: 0 20 7 0
	 * PATCH: 0..0, 7:garbage
	 * 2: 20 16 7 0
	 */
	@Test
	public void testPatchZeroLengthBaseRevision() throws Exception {
		repo = Configuration.get().find("status-5");
		// touch the file to force content retrieval
		File f2 = new File(repo.getWorkingDir(), "file2");
		f2.setLastModified(System.currentTimeMillis());
		//
		HgStatusCommand cmd = new HgStatusCommand(repo);
		cmd.all();
		StatusCollector sc = new StatusCollector();
		cmd.execute(sc);
		// shall pass without exception
		//
		for (Map.Entry<Path, Outcome> e : sc.getErrors().entrySet()) {
			System.out.printf("%s : (%s %s)\n", e.getKey(), e.getValue().getKind(), e.getValue().getMessage());
		}
		assertTrue(sc.getErrors().isEmpty());
	}
	
	@Test
	public void testNestedRepositoriesAreNotWalkedIn() throws Exception {
		repo = Configuration.get().find("status-nested-repo");
		File s2 = new File(repo.getWorkingDir(), "skip/s2/.hg/");
		File s1 = new File(repo.getWorkingDir(), "s1/.hg/");
		File s1b = new File(repo.getWorkingDir(), "s1/b");
		assertTrue("[sanity]", s1.exists() && s1.isDirectory());
		assertTrue("[sanity]", s1b.exists() && s1b.isFile());
		assertTrue("[sanity]", s2.exists() && s2.isDirectory());
		StatusCollector sc = new StatusCollector();
		new HgStatusCommand(repo).all().execute(sc);
		List<Path> ignored = sc.get(Ignored);
		assertEquals(1, ignored.size());
		assertEquals(Path.create("skip/a"), ignored.get(0));
		assertTrue(sc.get(Path.create("s1/b")).isEmpty());
	}
	
	@Test
	public void testDetectRenamesInNonFirstRev() throws Exception {
		repo = Configuration.get().find("log-renames");
		eh.cwd(repo.getWorkingDir());
		final HgStatusCommand cmd = new HgStatusCommand(repo).defaults();
		StatusCollector sc;
		for (int r : new int[] {2,3,4}) {
			statusParser.reset();
			eh.run("hg", "status", "-C", "--change", String.valueOf(r));
			cmd.change(r).execute(sc = new StatusCollector());
			sr.report("hg status -C --change " + r, sc);
		}
		// a and d from r5 are missing in r3
		statusParser.reset();
		eh.run("hg", "status", "-C", "--rev", "3", "--rev", "5");
		cmd.base(3).revision(5).execute(sc = new StatusCollector());
		sr.report("hg status -C 3..5 ", sc);
		//
		// a is c which is initially b
		// d is b which is initially a
		Path fa = Path.create("a"); 
		Path fb = Path.create("b");
		Path fc = Path.create("c");
		Path fd = Path.create("d");
		// neither initial a nor b have isCopy(() == true
		assertFalse("[sanity]", repo.getFileNode(fa).isCopy());
		// check HgStatusCollector
		// originals (base revision) doesn't contain first copy origin (there's no b in r2)
		cmd.base(2).revision(5).execute(sc = new StatusCollector());
		errorCollector.assertEquals(fa, sc.new2oldName.get(fd));
		errorCollector.assertEquals(Collections.singletonList(Removed), sc.get(fc));
		// ensure same result with HgWorkingCopyStatusCollector
		cmd.base(2).revision(WORKING_COPY).execute(sc = new StatusCollector());
		errorCollector.assertEquals(fa, sc.new2oldName.get(fd));
		errorCollector.assertEquals(Collections.singletonList(Removed), sc.get(fc));
		// originals (base revision) does contain first copy origin (b is in r1)
		cmd.base(1).revision(5).execute(sc = new StatusCollector());
		errorCollector.assertEquals(fa, sc.new2oldName.get(fd));
		errorCollector.assertEquals(Collections.singletonList(Removed), sc.get(fb));
	}

	/*
	 * With warm-up of previous tests, 10 runs, time in milliseconds
	 * 'hg status -A': Native client total 953 (95 per run), Java client 94 (9)
	 * 'hg status -A --rev 3:80': Native client total 1828 (182 per run), Java client 235 (23)
	 * 'hg log --debug', 10 runs: Native client total 1766 (176 per run), Java client 78 (7)
	 * 
	 * 18.02.2011
	 * 'hg status -A --rev 3:80', 10 runs: Native client total 2000 (200 per run), Java client 250 (25)
	 * 'hg log --debug', 10 runs: Native client total 2297 (229 per run), Java client 125 (12)
	 * 
	 * 9.3.2011 (DataAccess instead of byte[] in ReflogStream.Inspector
	 * 'hg status -A', 10 runs: Native client total 1516 (151 per run), Java client 219 (21)
	 * 'hg status -A --rev 3:80', 10 runs: Native client total 1875 (187 per run), Java client 3187 (318) (!!! ???)
	 * 'hg log --debug', 10 runs: Native client total 2484 (248 per run), Java client 344 (34)
	 */
	public void testPerformance() throws Exception {
		final int runs = 10;
		final long start1 = System.currentTimeMillis();
		for (int i = 0; i < runs; i++) {
			statusParser.reset();
			eh.run("hg", "status", "-A", "--rev", "3:80");
		}
		final long start2 = System.currentTimeMillis();
		for (int i = 0; i < runs; i++) {
			StatusCollector r = new StatusCollector();
			new HgStatusCommand(repo).all().base(3).revision(80).execute(r);
		}
		final long end = System.currentTimeMillis();
		System.out.printf("'hg status -A --rev 3:80', %d runs:  Native client total %d (%d per run), Java client %d (%d)\n", runs, start2 - start1, (start2 - start1) / runs, end - start2,
				(end - start2) / runs);
	}
	
	static class StatusReporter {
		private final StatusOutputParser statusParser;
		private final ErrorCollectorExt errorCollector;

		public StatusReporter(ErrorCollectorExt ec, StatusOutputParser sp) {
			errorCollector = ec;
			statusParser = sp;
		}
	
		public void report(String what, StatusCollector r) {
			errorCollector.assertTrue(what, r.getErrors().isEmpty());
			report(what, r.asStatusRecord());
		}

		public void report(String what, HgStatusCollector.Record r) {
			reportNotEqual(what + "#MODIFIED", r.getModified(), statusParser.getModified());
			reportNotEqual(what + "#ADDED", r.getAdded(), statusParser.getAdded());
			reportNotEqual(what + "#REMOVED", r.getRemoved(), statusParser.getRemoved());
			reportNotEqual(what + "#CLEAN", r.getClean(), statusParser.getClean());
			reportNotEqual(what + "#IGNORED", r.getIgnored(), statusParser.getIgnored());
			reportNotEqual(what + "#MISSING", r.getMissing(), statusParser.getMissing());
			reportNotEqual(what + "#UNKNOWN", r.getUnknown(), statusParser.getUnknown());
			List<Path> copiedKeyDiff = difference(r.getCopied().keySet(), statusParser.getCopied().keySet());
			HashMap<Path, String> copyDiff = new HashMap<Path, String>();
			if (copiedKeyDiff.isEmpty()) {
				for (Path jk : r.getCopied().keySet()) {
					Path jv = r.getCopied().get(jk);
					if (statusParser.getCopied().containsKey(jk)) {
						Path cmdv = statusParser.getCopied().get(jk);
						if (!jv.equals(cmdv)) {
							copyDiff.put(jk, jv + " instead of " + cmdv);
						}
					} else {
						copyDiff.put(jk, "ERRONEOUSLY REPORTED IN JAVA");
					}
				}
			}
			errorCollector.checkThat(what + "#Non-matching 'copied' keys: ", copiedKeyDiff, equalTo(Collections.<Path> emptyList()));
			errorCollector.checkThat(what + "#COPIED", copyDiff, equalTo(Collections.<Path, String> emptyMap()));
		}

		private <T extends Comparable<? super T>> void reportNotEqual(String what, Collection<T> l1, Collection<T> l2) {
		//		List<T> diff = difference(l1, l2);
		//		errorCollector.checkThat(what, diff, equalTo(Collections.<T>emptyList()));
			ArrayList<T> sl1 = new ArrayList<T>(l1);
			Collections.sort(sl1);
			ArrayList<T> sl2 = new ArrayList<T>(l2);
			Collections.sort(sl2);
			if (!sl1.isEmpty() && !sl2.isEmpty()) {
				what = what + ", diff:" + difference(sl1, sl2);
			}
			errorCollector.checkThat(what, sl1, equalTo(sl2));
		}

		public static <T> List<T> difference(Collection<T> l1, Collection<T> l2) {
			LinkedList<T> result = new LinkedList<T>(l2);
			for (T t : l1) {
				if (l2.contains(t)) {
					result.remove(t);
				} else {
					result.add(t);
				}
			}
			return result;
		}
	}
}