src/test/java/org/apache/commons/csv/issues/JiraCsv248Test.java

/*
 * 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.commons.csv.issues;

import static org.junit.jupiter.api.Assertions.assertEquals;
import static org.junit.jupiter.api.Assertions.assertFalse;
import static org.junit.jupiter.api.Assertions.assertNull;
import static org.junit.jupiter.api.Assertions.assertTrue;

import org.apache.commons.csv.CSVRecord;
import org.junit.jupiter.api.Test;

import java.io.IOException;
import java.io.InputStream;
import java.io.ObjectInputStream;

public class JiraCsv248Test {
    /**
     * Test deserialisation of a CSVRecord created using version 1.6.
     *
     * <p>This test asserts that serialization from 1.8 onwards is consistent with
     * previous versions. Serialization was broken in version 1.7.
     *
     * @throws IOException Signals that an I/O exception has occurred.
     * @throws ClassNotFoundException If the CSVRecord cannot be deserialized
     */
    @Test
    public void testJiraCsv248() throws IOException, ClassNotFoundException {
        // Record was originally created using CSV version 1.6 with the following code:
        //try (final CSVParser parser = CSVParser.parse("A,B\n#my comment\nOne,Two", CSVFormat.DEFAULT.withHeader().withCommentMarker('#'))) {
        //    CSVRecord rec = parser.iterator().next();
        //}
        try (InputStream in = getTestInput();
            ObjectInputStream ois = new ObjectInputStream(in)) {
            final Object object = ois.readObject();
            assertTrue(object instanceof CSVRecord);
            final CSVRecord rec = (CSVRecord) object;
            assertEquals(1L, rec.getRecordNumber());
            assertEquals("One", rec.get(0));
            assertEquals("Two", rec.get(1));
            assertEquals(2, rec.size());
            // The comment and whitespace are ignored so this is not 17 but 4
            assertEquals(4, rec.getCharacterPosition());
            assertEquals("my comment", rec.getComment());
            // The parser is not serialized
            assertNull(rec.getParser());
            // Check all header map functionality is absent
            assertTrue(rec.isConsistent());
            assertFalse(rec.isMapped("A"));
            assertFalse(rec.isSet("A"));
            assertEquals(0, rec.toMap().size());
            // This will throw
            try {
                rec.get("A");
                org.junit.jupiter.api.Assertions.fail("Access by name is not expected after deserialisation");
            } catch (final IllegalStateException expected) {
                // OK
            }
        }
    }

    private static InputStream getTestInput() {
        return ClassLoader.getSystemClassLoader().getResourceAsStream("CSV-248/csvRecord.bin");
    }
}