src/test/java/org/anarres/cpp/TokenPastingWhitespaceTest.java


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package org.anarres.cpp;

import com.google.common.io.CharStreams;
import java.io.IOException;
import java.io.Reader;
import org.junit.Test;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import static org.junit.Assert.*;

/**
 * https://github.com/shevek/jcpp/issues/25
 *
 * @author shevek
 */
public class TokenPastingWhitespaceTest {

    private static final Logger LOG = LoggerFactory.getLogger(TokenPastingWhitespaceTest.class);

    @Test
    public void testWhitespacePasting() throws IOException {
        Preprocessor pp = new Preprocessor();
        pp.addInput(new StringLexerSource(
                "#define ONE(arg) one_##arg\n"
                + "#define TWO(arg) ONE(two_##arg)\n"
                + "\n"
                + "TWO(good)\n"
                + "TWO(     /* evil newline */\n"
                + "    bad)\n"
                + "\n"
                + "ONE(good)\n"
                + "ONE(     /* evil newline */\n"
                + "    bad)\n", true));
        Reader r = new CppReader(pp);
        String text = CharStreams.toString(r).trim();
        LOG.info("Output is:\n" + text);
        assertEquals("one_two_good\n"
                + "one_two_bad\n"
                + "\n"
                + "one_good\n"
                + "one_bad", text);
    }
}