/*
    * Copyright (C) 2010, 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.util;
  
  import static java.nio.charset.StandardCharsets.US_ASCII;
  import static org.eclipse.jgit.util.RawCharUtil.isWhitespace;
  import static org.eclipse.jgit.util.RawCharUtil.trimLeadingWhitespace;
  import static org.eclipse.jgit.util.RawCharUtil.trimTrailingWhitespace;
  import static org.junit.Assert.assertEquals;
  import static org.junit.Assert.assertFalse;
  import static org.junit.Assert.assertTrue;
  
  import org.junit.Test;
  
  public class RawCharUtilTest {
  
  	/**
  	 * Test method for {@link RawCharUtil#isWhitespace(byte)}.
  	 */
  	@Test
  	public void testIsWhitespace() {
  		for (byte c = -128; c < 127; c++) {
  			switch (c) {
  			case (byte) '\r':
  			case (byte) '\n':
  			case (byte) '\t':
  			case (byte) ' ':
  				assertTrue(isWhitespace(c));
  				break;
  			default:
  				assertFalse(isWhitespace(c));
  			}
  		}
  	}
  
  	/**
  	 * Test method for
  	 * {@link RawCharUtil#trimTrailingWhitespace(byte[], int, int)}.
  	 */
  	@Test
  	public void testTrimTrailingWhitespace() {
  		assertEquals(0, trimTrailingWhitespace("".getBytes(US_ASCII), 0, 0));
  		assertEquals(0, trimTrailingWhitespace(" ".getBytes(US_ASCII), 0, 1));
  		assertEquals(1, trimTrailingWhitespace("a ".getBytes(US_ASCII), 0, 2));
  		assertEquals(2, trimTrailingWhitespace(" a ".getBytes(US_ASCII), 0, 3));
  		assertEquals(3, trimTrailingWhitespace("  a".getBytes(US_ASCII), 0, 3));
  		assertEquals(6,
  				trimTrailingWhitespace("  test   ".getBytes(US_ASCII), 2, 9));
  	}
  
  	/**
  	 * Test method for
  	 * {@link RawCharUtil#trimLeadingWhitespace(byte[], int, int)}.
  	 */
  	@Test
  	public void testTrimLeadingWhitespace() {
  		assertEquals(0, trimLeadingWhitespace("".getBytes(US_ASCII), 0, 0));
  		assertEquals(1, trimLeadingWhitespace(" ".getBytes(US_ASCII), 0, 1));
  		assertEquals(0, trimLeadingWhitespace("a ".getBytes(US_ASCII), 0, 2));
  		assertEquals(1, trimLeadingWhitespace(" a ".getBytes(US_ASCII), 0, 3));
  		assertEquals(2, trimLeadingWhitespace("  a".getBytes(US_ASCII), 0, 3));
  		assertEquals(2,
  				trimLeadingWhitespace("  test   ".getBytes(US_ASCII),
  				2, 9));
  	}
  
  }