package org.apache.maven.building;

/*
 * 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.
 */

import java.io.File;
import java.io.InputStream;
import java.util.Scanner;

import org.junit.jupiter.api.Test;

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

public class FileSourceTest
{

    @Test
    public void testFileSource()
    {
        NullPointerException e = assertThrows(
                NullPointerException.class,
                () -> new FileSource( null ),
                "Should fail, since you must specify a file" );
        assertEquals( "file cannot be null", e.getMessage() );
    }

    @Test
    public void testGetInputStream()
        throws Exception
    {
        File txtFile = new File( "target/test-classes/source.txt" );
        FileSource source = new FileSource( txtFile );

        try ( InputStream is = source.getInputStream();
              Scanner scanner = new Scanner( is ) )
        {

            assertEquals( "Hello World!", scanner.nextLine() );
        }
    }

    @Test
    public void testGetLocation()
    {
        File txtFile = new File( "target/test-classes/source.txt" );
        FileSource source = new FileSource( txtFile );
        assertEquals( txtFile.getAbsolutePath(), source.getLocation() );
    }

    @Test
    public void testGetFile()
    {
        File txtFile = new File( "target/test-classes/source.txt" );
        FileSource source = new FileSource( txtFile );
        assertEquals( txtFile.getAbsoluteFile(), source.getFile() );
    }

}