source: other-projects/rsyntax-textarea/devel-packages/jflex-1.4.3/examples/simple-maven/src/test/java/YylexTest.java@ 25584

import java.io.BufferedReader;
import java.io.File;
import java.io.FileOutputStream;
import java.io.FileReader;
import java.io.IOException;
import java.io.PrintStream;

import junit.framework.TestCase;

/**
 * This is an integration test.
 * 
 * The class Yylex is generated by JFLex from
 * <code>src/main/jflex/simple.flex</code>.
 * 
 * @author regis
 * 
 */
public class YylexTest extends TestCase {

    private static final String OUTPUT_FILE = "target/output.actual";

    /**
     * Test that Yylex parser behaves like expected.
     * 
     * @throws IOException
     */
    public void testOutput() throws IOException {
        String[] argv = new String[1];
        argv[0] = "src/test/resources/test.txt";

        // the Yylex prints status on stdout
        File actual = new File("target/output.actual");
        actual.delete();
        FileOutputStream fos = new FileOutputStream(OUTPUT_FILE, true);
        System.setOut(new PrintStream(fos));

        Yylex.main(argv);
        
        fos.close();
        
        // test actual is expected
        File expected = new File("src/test/resources/output.good");
        assertTrue(expected.isFile());
        assertTrue(actual.isFile());

        BufferedReader actualContent = new BufferedReader(
                new FileReader(actual));
        BufferedReader expectedContent = new BufferedReader(new FileReader(
                expected));

        for (int lineNumber = 1;lineNumber!=-1; lineNumber++) {
            String expectedLine = expectedContent.readLine();
            String actualLine = actualContent.readLine();           
            assertEquals("Line "+lineNumber, expectedLine, actualLine);
            if (expectedLine==null) lineNumber=-2; //EOF
        }
    }
}