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package org.anarres.cpp;
import java.io.IOException;
import org.junit.Test;
import static org.anarres.cpp.Token.*;
import static org.junit.Assert.*;
public class ErrorTest {
private boolean testError(Preprocessor p)
throws LexerException,
IOException {
for (;;) {
Token tok = p.token();
if (tok.getType() == EOF)
break;
if (tok.getType() == INVALID)
return true;
}
return false;
}
private void testError(String input) throws Exception {
StringLexerSource sl;
PreprocessorListener pl;
Preprocessor p;
/* Without a PreprocessorListener, throws an exception. */
sl = new StringLexerSource(input, true);
p = new Preprocessor();
p.addFeature(Feature.CSYNTAX);
p.addInput(sl);
try {
assertTrue(testError(p));
fail("Lexing unexpectedly succeeded without listener.");
} catch (LexerException e) {
/* required */
}
/* With a PreprocessorListener, records the error. */
sl = new StringLexerSource(input, true);
p = new Preprocessor();
p.addFeature(Feature.CSYNTAX);
p.addInput(sl);
pl = new PreprocessorListener();
p.setListener(pl);
assertNotNull("CPP has listener", p.getListener());
assertTrue(testError(p));
assertTrue("Listener has errors", pl.getErrors() > 0);
/* Without CSYNTAX, works happily. */
sl = new StringLexerSource(input, true);
p = new Preprocessor();
p.addInput(sl);
assertTrue(testError(p));
}
@Test
public void testErrors() throws Exception {
testError("\"");
testError("'");
// testError("''");
}
}
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