/*
 *  Licensed to the Apache Software Foundation (ASF) under one or more
 *  contributor license agreements.  See the NOTICE file distributed with
 *  this work for additional information regarding copyright ownership.
 *  The ASF licenses this file to You 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 org.apache.harmony.archive.util;

import junit.framework.TestCase;

public class UtilTest extends TestCase {
    private static final String ASCII_ALPHABET_LC = "abcdefghijklmnopqrstuvwxyz";
    private static final String ASCII_ALPHABET_UC = "ABCDEFGHIJKLMNOPQRSTUVWXYZ";
    private static final byte[] ASCII_ALPHABET_LC_BYTES;
    private static final byte[] ASCII_ALPHABET_UC_BYTES;

    static {
        ASCII_ALPHABET_LC_BYTES = new byte[ASCII_ALPHABET_LC.length()];
        for (int i = 0; i < ASCII_ALPHABET_LC_BYTES.length; i++) {
            final char c = ASCII_ALPHABET_LC.charAt(i);
            final byte b = (byte) c;
            assert ((char) b) == c;
            ASCII_ALPHABET_LC_BYTES[i] = b;
        }

        ASCII_ALPHABET_UC_BYTES = new byte[ASCII_ALPHABET_UC.length()];
        for (int i = 0; i < ASCII_ALPHABET_UC_BYTES.length; i++) {
            final char c = ASCII_ALPHABET_UC.charAt(i);
            final byte b = (byte) c;
            assert ((char) b) == c;
            ASCII_ALPHABET_UC_BYTES[i] = b;
        }
    }

    public void testASCIIIgnoreCaseRegionMatches() {
        final String s1 = ASCII_ALPHABET_LC;
        final String s2 = ASCII_ALPHABET_UC;
        for (int i = 0; i < s1.length(); i++) {
            assertTrue(Util.ASCIIIgnoreCaseRegionMatches(s1, i, s2, i, s1
                    .length()
                    - i));
        }
    }

    public void testToASCIIUpperCaseByte() {
        for (int i = 0; i < ASCII_ALPHABET_LC_BYTES.length; i++) {
            assertEquals(ASCII_ALPHABET_UC_BYTES[i], Util
                    .toASCIIUpperCase(ASCII_ALPHABET_LC_BYTES[i]));
        }
        for (int i = 0; i < ASCII_ALPHABET_UC_BYTES.length; i++) {
            assertEquals(ASCII_ALPHABET_UC_BYTES[i], Util
                    .toASCIIUpperCase(ASCII_ALPHABET_UC_BYTES[i]));
        }
    }

    public void testToASCIIUpperCaseChar() {
        for (int i = 0; i < ASCII_ALPHABET_LC.length(); i++) {
            assertEquals(ASCII_ALPHABET_UC.charAt(i), Util
                    .toASCIIUpperCase(ASCII_ALPHABET_LC.charAt(i)));
        }
        for (int i = 0; i < ASCII_ALPHABET_UC.length(); i++) {
            assertEquals(ASCII_ALPHABET_UC.charAt(i), Util
                    .toASCIIUpperCase(ASCII_ALPHABET_UC.charAt(i)));
        }
    }

    public void testEqualsIgnoreCaseByteArrayByteArray() {
        assertTrue(Util.equalsIgnoreCase(ASCII_ALPHABET_LC_BYTES,
                ASCII_ALPHABET_LC_BYTES));
        assertTrue(Util.equalsIgnoreCase(ASCII_ALPHABET_LC_BYTES,
                ASCII_ALPHABET_UC_BYTES));
        assertTrue(Util.equalsIgnoreCase(ASCII_ALPHABET_UC_BYTES,
                ASCII_ALPHABET_UC_BYTES));
    }

}