/*
 * Copyright (C) 2017, Google Inc.
 * 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
 *   copyright notice, this list of conditions and the following
 *   disclaimer in the documentation and/or other materials provided
 *   with the distribution.
 *
 * - Neither the name of the Eclipse Foundation, Inc. nor the
 *   names of its contributors may be used to endorse or promote
 *   products derived from this software without specific prior
 *   written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND
 * CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES,
 * INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
 * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
 * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */
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);
	}
}