/*
 * Copyright 2000-2009 JetBrains s.r.o.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 * http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package com.intellij.history.integration.ui;

import com.intellij.history.core.revisions.Difference;
import com.intellij.history.core.revisions.Revision;
import com.intellij.history.core.tree.DirectoryEntry;
import com.intellij.history.core.tree.Entry;
import com.intellij.history.integration.IntegrationTestCase;
import com.intellij.history.integration.ui.models.DirectoryChangeModel;
import com.intellij.openapi.vfs.VirtualFile;

import java.io.IOException;
import java.util.List;


public class DirectoryChangeModelTest extends IntegrationTestCase {
  public void testNames() throws IOException {
    VirtualFile f = createDirectory("foo");
    f.rename(this, "bar");

    List<Revision> revs = getRevisionsFor(f);

    Difference d = new Difference(false, revs.get(0).findEntry(), revs.get(1).findEntry());
    DirectoryChangeModel m = createModelOn(d);

    assertEquals("bar", m.getEntryName(0));
    assertEquals("foo", m.getEntryName(1));
  }

  public void testNamesForAbsentEntries() {
    Difference d = new Difference(false, null, null);
    DirectoryChangeModel m = createModelOn(d);

    assertEquals("", m.getEntryName(0));
    assertEquals("", m.getEntryName(1));
  }

  public void testCanShowFileDifference() throws IOException {
    VirtualFile f = createFile("foo.txt");
    setContent(f, "xxx");

    List<Revision> revs = getRevisionsFor(f);

    Difference d1 = new Difference(true, revs.get(0).findEntry(), revs.get(1).findEntry());
    Difference d2 = new Difference(true, null, revs.get(1).findEntry());
    Difference d3 = new Difference(true, revs.get(1).findEntry(), null);

    assertTrue(createModelOn(d1).canShowFileDifference());
    assertTrue(createModelOn(d2).canShowFileDifference());
    assertTrue(createModelOn(d3).canShowFileDifference());
  }

  public void testCanNotShowFileDifferenceForDirectories() {
    Entry left = new DirectoryEntry("left");
    Entry right = new DirectoryEntry("right");

    Difference d = new Difference(false, left, right);
    assertFalse(createModelOn(d).canShowFileDifference());
  }

  private DirectoryChangeModel createModelOn(Difference d) {
    return new DirectoryChangeModel(d, myGateway);
  }
}