/*
    * Copyright (C) 2017, 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 org.eclipse.jgit.errors.BinaryBlobException;
  import org.eclipse.jgit.internal.storage.file.FileRepository;
  import org.eclipse.jgit.junit.RepositoryTestCase;
  import org.eclipse.jgit.lib.Constants;
  import org.eclipse.jgit.lib.ObjectId;
  import org.eclipse.jgit.lib.ObjectInserter;
  import org.eclipse.jgit.lib.ObjectLoader;
  import org.junit.Assert;
  import org.junit.Test;
  
  import java.io.IOException;
  
  public class RawTextLoadTest extends RepositoryTestCase {
  	private static byte[] generate(int size, int nullAt) {
  		byte[] data = new byte[size];
  		for (int i = 0; i < data.length; i++) {
  			data[i] = (byte) ((i % 72 == 0) ? '\n' : (i%10) + '0');
  		}
  		if (nullAt >= 0) {
  			data[nullAt] = '\0';
  		}
  		return data;
  	}
  
  	private RawText textFor(byte[] data, int limit) throws IOException, BinaryBlobException {
  		FileRepository repo = createBareRepository();
  		ObjectId id;
  		try (ObjectInserter ins = repo.getObjectDatabase().newInserter()) {
  			id = ins.insert(Constants.OBJ_BLOB, data);
  		}
  		ObjectLoader ldr = repo.open(id);
  		return RawText.load(ldr, limit);
  	}
  
  	@Test
  	public void testSmallOK() throws Exception {
  		byte[] data = generate(1000, -1);
  		RawText result = textFor(data, 1 << 20);
  		Assert.assertArrayEquals(result.content, data);
  	}
  
  	@Test(expected = BinaryBlobException.class)
  	public void testSmallNull() throws Exception {
  		byte[] data = generate(1000, 22);
  		textFor(data, 1 << 20);
  	}
  
  	@Test
  	public void testBigOK() throws Exception {
  		byte[] data = generate(10000, -1);
  		RawText result = textFor(data, 1 << 20);
  		Assert.assertArrayEquals(result.content, data);
  	}
  
  	@Test(expected = BinaryBlobException.class)
  	public void testBigWithNullAtStart() throws Exception {
  		byte[] data = generate(10000, 22);
  		textFor(data, 1 << 20);
  	}
  
  	@Test(expected = BinaryBlobException.class)
  	public void testBinaryThreshold() throws Exception {
  		byte[] data = generate(2 << 20, -1);
  		textFor(data, 1 << 20);
  	}
  }