/*
    * Copyright (C) 2013, Robin Stocker <robin@nibor.org> 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.util;
  
  import static java.nio.charset.StandardCharsets.UTF_8;
  import static org.junit.Assert.assertEquals;
  import static org.junit.Assert.assertNotNull;
  
  import org.eclipse.jgit.junit.RepositoryTestCase;
  import org.junit.Test;
  
  public class RawSubStringPatternTest extends RepositoryTestCase {
  
  	@Test
  	public void testBoundary() {
  		assertMatchResult("a", "a", 0);
  		assertMatchResult("a", "abcd", 0);
  		assertMatchResult("ab", "abcd", 0);
  		assertMatchResult("abcd", "abcd", 0);
  		assertMatchResult("bc", "abcd", 1);
  		assertMatchResult("bcd", "abcd", 1);
  		assertMatchResult("cd", "abcd", 2);
  		assertMatchResult("d", "abcd", 3);
  		assertMatchResult("abab", "abaabab", 3);
  	}
  
  	@Test
  	public void testNoMatches() {
  		assertMatchResult("a", "", -1);
  		assertMatchResult("a", "b", -1);
  		assertMatchResult("abab", "abaaba", -1);
  		assertMatchResult("ab", "ddda", -1);
  	}
  
  	@Test
  	public void testCaseInsensitive() {
  		assertMatchResult("a", "A", 0);
  		assertMatchResult("A", "a", 0);
  		assertMatchResult("Ab", "aB", 0);
  		assertMatchResult("aB", "Ab", 0);
  	}
  
  	@Test(expected = IllegalArgumentException.class)
  	public void testEmptyPattern() {
  		assertNotNull(new RawSubStringPattern(""));
  	}
  
  	private static void assertMatchResult(String pattern, String input, int position) {
  		RawSubStringPattern p = new RawSubStringPattern(pattern);
  		assertEquals("Expected match result " + position + " with input "
  				+ input + " for pattern " + pattern,
  				position, p.match(raw(input)));
  	}
  
  	private static RawCharSequence raw(String text) {
  		byte[] bytes = text.getBytes(UTF_8);
  		return new RawCharSequence(bytes, 0, bytes.length);
  	}
  }