/*
 * Copyright 2007-2023 The jdeb developers.
 *
 * Licensed 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.vafer.jdeb.utils;

import java.io.ByteArrayOutputStream;
import java.io.InputStream;

import org.junit.Test;
import org.junit.Assert;

public class InformationInputStreamTestCase extends Assert {

    private InputStream getStream( String file ) {
        return getClass().getClassLoader().getResourceAsStream("org/vafer/jdeb/utils/" + file);
    }

    @Test
    public void testUTF8CRLF() throws Exception {
        InformationInputStream informationStream = new InformationInputStream(getStream("utf8-crlf.txt"));
        Utils.copy(informationStream, new ByteArrayOutputStream());
        assertTrue("Should be windows line endings", !informationStream.hasUnixLineEndings());
        assertTrue("Shebang not detected", informationStream.isShell());
        assertTrue("BOM detected", !informationStream.hasBom());
        assertEquals("Encoding", null, informationStream.getEncoding());
    }

    @Test
    public void testUTF8() throws Exception {
        InformationInputStream informationStream = new InformationInputStream(getStream("utf8-lf.txt"));
        Utils.copy(informationStream, new ByteArrayOutputStream());
        assertTrue("Shebang not detected", informationStream.isShell());
        assertTrue("BOM detected", !informationStream.hasBom());
        assertEquals("Encoding", null, informationStream.getEncoding());
    }

    @Test
    public void testUTF8BOM() throws Exception {
        InformationInputStream informationStream = new InformationInputStream(getStream("utf8-lf-bom.txt"));
        Utils.copy(informationStream, new ByteArrayOutputStream());
        assertTrue("Shebang not detected", informationStream.isShell());
        assertTrue("BOM not detected", informationStream.hasBom());
        assertEquals("Encoding", "UTF-8", informationStream.getEncoding());
    }

    @Test
    public void testUTF16BE() throws Exception {
        InformationInputStream informationStream = new InformationInputStream(getStream("utf16be-lf.txt"));
        Utils.copy(informationStream, new ByteArrayOutputStream());
        assertTrue("Shebang not detected", informationStream.isShell());
        assertTrue("BOM detected", !informationStream.hasBom());
        assertEquals("Encoding", "UTF-16BE", informationStream.getEncoding());
    }

    @Test
    public void testUTF16BEBOM() throws Exception {
        InformationInputStream informationStream = new InformationInputStream(getStream("utf16be-lf-bom.txt"));
        Utils.copy(informationStream, new ByteArrayOutputStream());
        assertTrue("Shebang not detected", informationStream.isShell());
        assertTrue("BOM not detected", informationStream.hasBom());
        assertEquals("Encoding", "UTF-16BE", informationStream.getEncoding());
    }

    @Test
    public void testUTF16LE() throws Exception {
        InformationInputStream informationStream = new InformationInputStream(getStream("utf16le-lf.txt"));
        Utils.copy(informationStream, new ByteArrayOutputStream());
        assertTrue("Shebang not detected", informationStream.isShell());
        assertTrue("BOM detected", !informationStream.hasBom());
        assertEquals("Encoding", "UTF-16LE", informationStream.getEncoding());
    }

    @Test
    public void testUTF16LEBOM() throws Exception {
        InformationInputStream informationStream = new InformationInputStream(getStream("utf16le-lf-bom.txt"));
        Utils.copy(informationStream, new ByteArrayOutputStream());
        assertTrue("Shebang not detected", informationStream.isShell());
        assertTrue("BOM not detected", informationStream.hasBom());
        assertEquals("Encoding", "UTF-16LE", informationStream.getEncoding());
    }
}
