src/test/java/org/apache/commons/csv/issues/JiraCsv263Test.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
 *
 *   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
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 * 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 java.io.IOException;
import java.io.Reader;
import java.io.StringReader;

import org.apache.commons.csv.CSVFormat;
import org.apache.commons.csv.QuoteMode;
import org.junit.jupiter.api.Test;

/**
 * Tests [CSV-263] Print from Reader with embedded quotes generates incorrect output.
 */
class JiraCsv263Test {

    @Test
    void testPrintFromReaderWithQuotes() throws IOException {
        // @formatter:off
        final CSVFormat format = CSVFormat.RFC4180.builder()
            .setDelimiter(',')
            .setQuote('"')
            .setEscape('?')
            .setQuoteMode(QuoteMode.NON_NUMERIC)
            .get();
        // @formatter:on
        final StringBuilder out = new StringBuilder();

        final Reader atStartOnly = new StringReader("\"a,b,c\r\nx,y,z");
        format.print(atStartOnly, out, true);
        assertEquals("\"\"\"a,b,c\r\nx,y,z\"", out.toString());

        final Reader atEndOnly = new StringReader("a,b,c\r\nx,y,z\"");
        out.setLength(0);
        format.print(atEndOnly, out, true);
        assertEquals("\"a,b,c\r\nx,y,z\"\"\"", out.toString());

        final Reader atBeginEnd = new StringReader("\"a,b,c\r\nx,y,z\"");
        out.setLength(0);
        format.print(atBeginEnd, out, true);
        assertEquals("\"\"\"a,b,c\r\nx,y,z\"\"\"", out.toString());

        final Reader embeddedBeginMiddle = new StringReader("\"a\",b,c\r\nx,\"y\",z");
        out.setLength(0);
        format.print(embeddedBeginMiddle, out, true);
        assertEquals("\"\"\"a\"\",b,c\r\nx,\"\"y\"\",z\"", out.toString());

        final Reader embeddedMiddleEnd = new StringReader("a,\"b\",c\r\nx,y,\"z\"");
        out.setLength(0);
        format.print(embeddedMiddleEnd, out, true);
        assertEquals("\"a,\"\"b\"\",c\r\nx,y,\"\"z\"\"\"", out.toString());

        final Reader nested = new StringReader("a,\"b \"and\" c\",d");
        out.setLength(0);
        format.print(nested, out, true);
        assertEquals("\"a,\"\"b \"\"and\"\" c\"\",d\"", out.toString());
    }

}