/*
 * Copyright 2011 Google Inc. All rights reserved.
 *
 * 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.google.errorprone.apply;

import static org.junit.Assert.assertEquals;

import java.util.Arrays;
import java.util.List;
import org.junit.Before;
import org.junit.Test;
import org.junit.runner.RunWith;
import org.junit.runners.JUnit4;

/**
 * Unit tests for {@link SourceFile}s.
 * 
 * @author sjnickerson@google.com (Simon Nickerson)
 */
@RunWith(JUnit4.class)
public class SourceFileTest {
  
  private static final String DUMMY_PATH = "java/com/google/foo/bar/FooBar.java";
  private static final String SOURCE_TEXT =
      "// Lorem ipsum dolor sit amet, consectetur adipisicing elit, sed do\n"
          + "// eiusmod tempor incididunt ut labore et dolore magna aliqua. Ut\n"
          + "// enim ad minim veniam, quis nostrud exercitation ullamco\n"
          + "// laboris nisi ut aliquip ex ea commodo consequat. Duis aute\n"
          + "// irure dolor in reprehenderit in voluptate velit esse cillum dolore\n"
          + "// eu fugiat nulla pariatur. Excepteur sint occaecat cupidatat\n"
          + "// non proident, sunt in culpa qui officia deserunt mollit anim id\n"
          + "// est laborum.\n";

  private SourceFile sourceFile;
  
  @Before
  public void setUp() {
    sourceFile = new SourceFile(DUMMY_PATH, SOURCE_TEXT);
  }

  @Test
  public void getSourceText() {
    assertEquals(SOURCE_TEXT, sourceFile.getSourceText());
  }
  
  @Test
  public void getPath() {
    assertEquals(DUMMY_PATH, sourceFile.getPath());    
  }

  @Test
  public void getLines() {
    List<String> lines = sourceFile.getLines();
    assertEquals(8, lines.size());
    assertEquals(
        "// Lorem ipsum dolor sit amet, consectetur adipisicing elit, sed do",
        lines.get(0));
    assertEquals("// est laborum.", lines.get(7));
  }
  
  @Test
  public void replaceChars() {
    sourceFile.replaceChars(3, 8, "Sasquatch");
    assertEquals(
        SOURCE_TEXT.replaceAll("Lorem", "Sasquatch"),
        sourceFile.getSourceText());
    assertEquals(
        "// Sasquatch ipsum dolor sit amet, consectetur adipisicing elit, sed do",
        sourceFile.getLines().get(0));
  }
  
  @Test
  public void replaceLines() {
    sourceFile.replaceLines(Arrays.asList("Line1", "Line2"));
    assertEquals("Line1\nLine2\n", sourceFile.getSourceText());
  }
  
  @Test
  public void replaceLines_numbered() {
    sourceFile.replaceLines(2, 5, Arrays.asList("cat", "dog"));
    assertEquals(
        "// Lorem ipsum dolor sit amet, consectetur adipisicing elit, sed do\n"
            + "cat\n"
            + "dog\n"
            + "// eu fugiat nulla pariatur. Excepteur sint occaecat cupidatat\n"
            + "// non proident, sunt in culpa qui officia deserunt mollit anim id\n"
            + "// est laborum.\n",
        sourceFile.getSourceText());
  }
  
  @Test
  public void getFragmentByChars() {
    assertEquals("Lorem", sourceFile.getFragmentByChars(3, 8));
  }
  
  @Test
  public void getFragmentByLines() {
    assertEquals(
        "// eiusmod tempor incididunt ut labore et dolore magna aliqua. Ut\n",
        sourceFile.getFragmentByLines(2, 2));
    assertEquals(
        "// est laborum.\n",
        sourceFile.getFragmentByLines(8, 8));
    assertEquals(
        "// eiusmod tempor incididunt ut labore et dolore magna aliqua. Ut\n"
            + "// enim ad minim veniam, quis nostrud exercitation ullamco\n",
        sourceFile.getFragmentByLines(2, 3));
    assertEquals(
        SOURCE_TEXT,
        sourceFile.getFragmentByLines(1, 8));
  }
}