/**
 * AnalyzerBeans
 * Copyright (C) 2014 Neopost - Customer Information Management
 *
 * This copyrighted material is made available to anyone wishing to use, modify,
 * copy, or redistribute it subject to the terms and conditions of the GNU
 * Lesser General Public License, as published by the Free Software Foundation.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
 * or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU Lesser General Public License
 * for more details.
 *
 * You should have received a copy of the GNU Lesser General Public License
 * along with this distribution; if not, write to:
 * Free Software Foundation, Inc.
 * 51 Franklin Street, Fifth Floor
 * Boston, MA  02110-1301  USA
 */
package org.eobjects.analyzer.beans.convert;

import java.io.ByteArrayInputStream;
import java.io.InputStream;
import java.io.StringReader;

import org.eobjects.analyzer.data.InputColumn;
import org.eobjects.analyzer.data.MockInputColumn;
import org.eobjects.analyzer.data.MockInputRow;

import junit.framework.TestCase;

public class ConvertToStringTransformerTest extends TestCase {

    public void testBasicScenario() throws Exception {
        ConvertToStringTransformer t = new ConvertToStringTransformer();
        InputColumn<Object> col = new MockInputColumn<Object>("foo");
        t.setInput(new InputColumn[] { col });
        t.setNullReplacement("!null!");
        
        assertEquals("OutputColumns[foo (as string)]", t.getOutputColumns().toString());

        assertEquals("!null!", t.transform(new MockInputRow().put(col, null))[0]);
        assertEquals("foo", t.transform(new MockInputRow().put(col, "foo"))[0]);
    }

    public void testTransformValue() throws Exception {
        assertEquals("hello\nworld", ConvertToStringTransformer.transformValue("hello\nworld"));

        assertEquals("w00p\nw0000p",
                ConvertToStringTransformer.transformValue(new ByteArrayInputStream("w00p\nw0000p".getBytes())));

        assertEquals("mrr\nrh", ConvertToStringTransformer.transformValue(new StringReader("mrr\nrh")));
    }

    public void testTransformInputStream() throws Exception {
        InputStream inputStream = new ByteArrayInputStream("hello\nworld".getBytes());
        assertEquals("hello\nworld", ConvertToStringTransformer.transformValue(inputStream));

        inputStream = new ByteArrayInputStream("hello\r\nworld\n".getBytes());
        assertEquals("hello\r\nworld\n", ConvertToStringTransformer.transformValue(inputStream));

        // make a string that will not fit into the buffer being used in the
        // converter
        StringBuilder longString = new StringBuilder("hello");
        for (int i = 0; i < 1024; i++) {
            longString.append(" hello");
        }

        inputStream = new ByteArrayInputStream(longString.toString().getBytes());
        assertEquals(longString.toString(), ConvertToStringTransformer.transformValue(inputStream));
    }
}