/*
 * 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
 *
 *   https://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.
 *
 *   SPDX-License-Identifier: Apache-2.0
 */

package org.apache.jena.atlas.io;

import static org.junit.jupiter.api.Assertions.assertEquals;

import java.io.ByteArrayOutputStream;
import java.io.IOException;
import java.io.OutputStreamWriter;
import java.io.Writer;

import org.junit.jupiter.api.Test;

public class TestPrintUtils {
    @Test
    public void hex1() {
        String s = test(0, 4);
        assertEquals("0000", s);
    }

    @Test
    public void hex2() {
        String s = test(1, 8);
        assertEquals("00000001", s);
    }

    @Test
    public void hex3() {
        String s = test(0xFF, 2);
        assertEquals("FF", s);
    }

    private static String test(int value, int width) {
        ByteArrayOutputStream x = new ByteArrayOutputStream();
        Writer out = new OutputStreamWriter(x);
        OutputUtils.printHex(out, value, width);
        try {
            out.flush();
        } catch (IOException ex) {}
        String s = x.toString();
        return s;
    }
}
