Package org.eclipse.jgit.dircache

Source Code of org.eclipse.jgit.dircache.ReceivedEventMarkerException

/*
* Copyright (C) 2008-2009, Google Inc.
* Copyright (C) 2011, Matthias Sohn <matthias.sohn@sap.com>
* and other copyright owners as documented in the project's IP log.
*
* This program and the accompanying materials are made available
* under the terms of the Eclipse Distribution License v1.0 which
* accompanies this distribution, is reproduced below, and is
* available at http://www.eclipse.org/org/documents/edl-v10.php
*
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or
* without modification, are permitted provided that the following
* conditions are met:
*
* - Redistributions of source code must retain the above copyright
*   notice, this list of conditions and the following disclaimer.
*
* - Redistributions in binary form must reproduce the above
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*   disclaimer in the documentation and/or other materials provided
*   with the distribution.
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*   names of its contributors may be used to endorse or promote
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package org.eclipse.jgit.dircache;

import static org.junit.Assert.assertEquals;
import static org.junit.Assert.assertFalse;
import static org.junit.Assert.assertNotNull;
import static org.junit.Assert.assertNotSame;
import static org.junit.Assert.assertSame;
import static org.junit.Assert.assertTrue;
import static org.junit.Assert.fail;

import java.io.File;

import org.eclipse.jgit.events.IndexChangedEvent;
import org.eclipse.jgit.events.IndexChangedListener;
import org.eclipse.jgit.events.ListenerList;
import org.eclipse.jgit.junit.RepositoryTestCase;
import org.eclipse.jgit.lib.FileMode;
import org.eclipse.jgit.lib.ObjectId;
import org.junit.Test;

public class DirCacheBuilderTest extends RepositoryTestCase {
  @Test
  public void testBuildEmpty() throws Exception {
    {
      final DirCache dc = db.lockDirCache();
      final DirCacheBuilder b = dc.builder();
      assertNotNull(b);
      b.finish();
      dc.write();
      assertTrue(dc.commit());
    }
    {
      final DirCache dc = db.readDirCache();
      assertEquals(0, dc.getEntryCount());
    }
  }

  @Test
  public void testBuildRejectsUnsetFileMode() throws Exception {
    final DirCache dc = DirCache.newInCore();
    final DirCacheBuilder b = dc.builder();
    assertNotNull(b);

    final DirCacheEntry e = new DirCacheEntry("a");
    assertEquals(0, e.getRawMode());
    try {
      b.add(e);
    } catch (IllegalArgumentException err) {
      assertEquals("FileMode not set for path a", err.getMessage());
    }
  }

  @Test
  public void testBuildOneFile_FinishWriteCommit() throws Exception {
    final String path = "a-file-path";
    final FileMode mode = FileMode.REGULAR_FILE;
    final long lastModified = 1218123387057L;
    final int length = 1342;
    final DirCacheEntry entOrig;
    {
      final DirCache dc = db.lockDirCache();
      final DirCacheBuilder b = dc.builder();
      assertNotNull(b);

      entOrig = new DirCacheEntry(path);
      entOrig.setFileMode(mode);
      entOrig.setLastModified(lastModified);
      entOrig.setLength(length);

      assertNotSame(path, entOrig.getPathString());
      assertEquals(path, entOrig.getPathString());
      assertEquals(ObjectId.zeroId(), entOrig.getObjectId());
      assertEquals(mode.getBits(), entOrig.getRawMode());
      assertEquals(0, entOrig.getStage());
      assertEquals(lastModified, entOrig.getLastModified());
      assertEquals(length, entOrig.getLength());
      assertFalse(entOrig.isAssumeValid());
      b.add(entOrig);

      b.finish();
      assertEquals(1, dc.getEntryCount());
      assertSame(entOrig, dc.getEntry(0));

      dc.write();
      assertTrue(dc.commit());
    }
    {
      final DirCache dc = db.readDirCache();
      assertEquals(1, dc.getEntryCount());

      final DirCacheEntry entRead = dc.getEntry(0);
      assertNotSame(entOrig, entRead);
      assertEquals(path, entRead.getPathString());
      assertEquals(ObjectId.zeroId(), entOrig.getObjectId());
      assertEquals(mode.getBits(), entOrig.getRawMode());
      assertEquals(0, entOrig.getStage());
      assertEquals(lastModified, entOrig.getLastModified());
      assertEquals(length, entOrig.getLength());
      assertFalse(entOrig.isAssumeValid());
    }
  }

  @Test
  public void testBuildOneFile_Commit() throws Exception {
    final String path = "a-file-path";
    final FileMode mode = FileMode.REGULAR_FILE;
    final long lastModified = 1218123387057L;
    final int length = 1342;
    final DirCacheEntry entOrig;
    {
      final DirCache dc = db.lockDirCache();
      final DirCacheBuilder b = dc.builder();
      assertNotNull(b);

      entOrig = new DirCacheEntry(path);
      entOrig.setFileMode(mode);
      entOrig.setLastModified(lastModified);
      entOrig.setLength(length);

      assertNotSame(path, entOrig.getPathString());
      assertEquals(path, entOrig.getPathString());
      assertEquals(ObjectId.zeroId(), entOrig.getObjectId());
      assertEquals(mode.getBits(), entOrig.getRawMode());
      assertEquals(0, entOrig.getStage());
      assertEquals(lastModified, entOrig.getLastModified());
      assertEquals(length, entOrig.getLength());
      assertFalse(entOrig.isAssumeValid());
      b.add(entOrig);

      assertTrue(b.commit());
      assertEquals(1, dc.getEntryCount());
      assertSame(entOrig, dc.getEntry(0));
      assertFalse(new File(db.getDirectory(), "index.lock").exists());
    }
    {
      final DirCache dc = db.readDirCache();
      assertEquals(1, dc.getEntryCount());

      final DirCacheEntry entRead = dc.getEntry(0);
      assertNotSame(entOrig, entRead);
      assertEquals(path, entRead.getPathString());
      assertEquals(ObjectId.zeroId(), entOrig.getObjectId());
      assertEquals(mode.getBits(), entOrig.getRawMode());
      assertEquals(0, entOrig.getStage());
      assertEquals(lastModified, entOrig.getLastModified());
      assertEquals(length, entOrig.getLength());
      assertFalse(entOrig.isAssumeValid());
    }
  }

  @Test
  public void testBuildOneFile_Commit_IndexChangedEvent()
      throws Exception {
    final class ReceivedEventMarkerException extends RuntimeException {
      private static final long serialVersionUID = 1L;
      // empty
    }

    final String path = "a-file-path";
    final FileMode mode = FileMode.REGULAR_FILE;
    // "old" date in 2008
    final long lastModified = 1218123387057L;
    final int length = 1342;
    DirCacheEntry entOrig;
    boolean receivedEvent = false;

    DirCache dc = db.lockDirCache();
    IndexChangedListener listener = new IndexChangedListener() {

      public void onIndexChanged(IndexChangedEvent event) {
        throw new ReceivedEventMarkerException();
      }
    };

    ListenerList l = db.getListenerList();
    l.addIndexChangedListener(listener);
    DirCacheBuilder b = dc.builder();

    entOrig = new DirCacheEntry(path);
    entOrig.setFileMode(mode);
    entOrig.setLastModified(lastModified);
    entOrig.setLength(length);
    b.add(entOrig);
    try {
      b.commit();
    } catch (ReceivedEventMarkerException e) {
      receivedEvent = true;
    }
    if (!receivedEvent)
      fail("did not receive IndexChangedEvent");

    // do the same again, as this doesn't change index compared to first
    // round we should get no event this time
    dc = db.lockDirCache();
    listener = new IndexChangedListener() {

      public void onIndexChanged(IndexChangedEvent event) {
        throw new ReceivedEventMarkerException();
      }
    };

    l = db.getListenerList();
    l.addIndexChangedListener(listener);
    b = dc.builder();

    entOrig = new DirCacheEntry(path);
    entOrig.setFileMode(mode);
    entOrig.setLastModified(lastModified);
    entOrig.setLength(length);
    b.add(entOrig);
    try {
      b.commit();
    } catch (ReceivedEventMarkerException e) {
      fail("unexpected IndexChangedEvent");
    }
  }

  @Test
  public void testFindSingleFile() throws Exception {
    final String path = "a-file-path";
    final DirCache dc = db.readDirCache();
    final DirCacheBuilder b = dc.builder();
    assertNotNull(b);

    final DirCacheEntry entOrig = new DirCacheEntry(path);
    entOrig.setFileMode(FileMode.REGULAR_FILE);
    assertNotSame(path, entOrig.getPathString());
    assertEquals(path, entOrig.getPathString());
    b.add(entOrig);
    b.finish();

    assertEquals(1, dc.getEntryCount());
    assertSame(entOrig, dc.getEntry(0));
    assertEquals(0, dc.findEntry(path));

    assertEquals(-1, dc.findEntry("@@-before"));
    assertEquals(0, real(dc.findEntry("@@-before")));

    assertEquals(-2, dc.findEntry("a-zoo"));
    assertEquals(1, real(dc.findEntry("a-zoo")));

    assertSame(entOrig, dc.getEntry(path));
  }

  @Test
  public void testAdd_InGitSortOrder() throws Exception {
    final DirCache dc = db.readDirCache();

    final String[] paths = { "a.", "a.b", "a/b", "a0b" };
    final DirCacheEntry[] ents = new DirCacheEntry[paths.length];
    for (int i = 0; i < paths.length; i++) {
      ents[i] = new DirCacheEntry(paths[i]);
      ents[i].setFileMode(FileMode.REGULAR_FILE);
    }

    final DirCacheBuilder b = dc.builder();
    for (int i = 0; i < ents.length; i++)
      b.add(ents[i]);
    b.finish();

    assertEquals(paths.length, dc.getEntryCount());
    for (int i = 0; i < paths.length; i++) {
      assertSame(ents[i], dc.getEntry(i));
      assertEquals(paths[i], dc.getEntry(i).getPathString());
      assertEquals(i, dc.findEntry(paths[i]));
      assertSame(ents[i], dc.getEntry(paths[i]));
    }
  }

  @Test
  public void testAdd_ReverseGitSortOrder() throws Exception {
    final DirCache dc = db.readDirCache();

    final String[] paths = { "a.", "a.b", "a/b", "a0b" };
    final DirCacheEntry[] ents = new DirCacheEntry[paths.length];
    for (int i = 0; i < paths.length; i++) {
      ents[i] = new DirCacheEntry(paths[i]);
      ents[i].setFileMode(FileMode.REGULAR_FILE);
    }

    final DirCacheBuilder b = dc.builder();
    for (int i = ents.length - 1; i >= 0; i--)
      b.add(ents[i]);
    b.finish();

    assertEquals(paths.length, dc.getEntryCount());
    for (int i = 0; i < paths.length; i++) {
      assertSame(ents[i], dc.getEntry(i));
      assertEquals(paths[i], dc.getEntry(i).getPathString());
      assertEquals(i, dc.findEntry(paths[i]));
      assertSame(ents[i], dc.getEntry(paths[i]));
    }
  }

  @Test
  public void testBuilderClear() throws Exception {
    final DirCache dc = db.readDirCache();

    final String[] paths = { "a.", "a.b", "a/b", "a0b" };
    final DirCacheEntry[] ents = new DirCacheEntry[paths.length];
    for (int i = 0; i < paths.length; i++) {
      ents[i] = new DirCacheEntry(paths[i]);
      ents[i].setFileMode(FileMode.REGULAR_FILE);
    }
    {
      final DirCacheBuilder b = dc.builder();
      for (int i = 0; i < ents.length; i++)
        b.add(ents[i]);
      b.finish();
    }
    assertEquals(paths.length, dc.getEntryCount());
    {
      final DirCacheBuilder b = dc.builder();
      b.finish();
    }
    assertEquals(0, dc.getEntryCount());
  }

  private static int real(int eIdx) {
    if (eIdx < 0)
      eIdx = -(eIdx + 1);
    return eIdx;
  }
}
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