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package org.anarres.cpp;
import java.util.Arrays;
import org.junit.Test;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import static org.anarres.cpp.PreprocessorTest.assertType;
import static org.anarres.cpp.Token.*;
import static org.junit.Assert.*;
public class LexerSourceTest {
private static final Logger LOG = LoggerFactory.getLogger(LexerSourceTest.class);
public static void testLexerSource(String in, boolean textmatch, int... out)
throws Exception {
LOG.info("Testing '" + in + "' => "
+ Arrays.toString(out));
StringLexerSource s = new StringLexerSource(in);
StringBuilder buf = new StringBuilder();
for (int i = 0; i < out.length; i++) {
Token tok = s.token();
LOG.info("Token is " + tok);
assertType(out[i], tok);
// assertEquals(col, tok.getColumn());
buf.append(tok.getText());
}
Token tok = s.token();
LOG.info("Token is " + tok);
assertType(EOF, tok);
if (textmatch)
assertEquals(in, buf.toString());
}
@Test
public void testLexerSource()
throws Exception {
testLexerSource("int a = 5;", true,
IDENTIFIER, WHITESPACE, IDENTIFIER, WHITESPACE,
'=', WHITESPACE, NUMBER, ';'
);
// \n is WHITESPACE because ppvalid = false
testLexerSource("# # \r\n\n\r \rfoo", true,
HASH, WHITESPACE, '#', WHITESPACE, IDENTIFIER
);
// No match - trigraphs
testLexerSource("%:%:", false, PASTE);
testLexerSource("%:?", false, '#', '?');
testLexerSource("%:%=", false, '#', MOD_EQ);
testLexerSource("0x1234ffdUL 0765I", true,
NUMBER, WHITESPACE, NUMBER);
testLexerSource("+= -= *= /= %= <= >= >>= <<= &= |= ^= x", true,
PLUS_EQ, WHITESPACE,
SUB_EQ, WHITESPACE,
MULT_EQ, WHITESPACE,
DIV_EQ, WHITESPACE,
MOD_EQ, WHITESPACE,
LE, WHITESPACE,
GE, WHITESPACE,
RSH_EQ, WHITESPACE,
LSH_EQ, WHITESPACE,
AND_EQ, WHITESPACE,
OR_EQ, WHITESPACE,
XOR_EQ, WHITESPACE,
IDENTIFIER);
testLexerSource("/**/", true, CCOMMENT);
testLexerSource("/* /**/ */", true, CCOMMENT, WHITESPACE, '*', '/');
testLexerSource("/** ** **/", true, CCOMMENT);
testLexerSource("//* ** **/", true, CPPCOMMENT);
testLexerSource("'\\r' '\\xf' '\\xff' 'x' 'aa' ''", true,
CHARACTER, WHITESPACE,
CHARACTER, WHITESPACE,
CHARACTER, WHITESPACE,
CHARACTER, WHITESPACE,
SQSTRING, WHITESPACE,
SQSTRING);
if (false) // Actually, I think this is illegal.
testLexerSource("1i1I1l1L1ui1ul", true,
NUMBER, NUMBER,
NUMBER, NUMBER,
NUMBER, NUMBER);
testLexerSource("'' 'x' 'xx'", true,
SQSTRING, WHITESPACE, CHARACTER, WHITESPACE, SQSTRING);
}
@Test
public void testNumbers() throws Exception {
testLexerSource("0", true, NUMBER);
testLexerSource("045", true, NUMBER);
testLexerSource("45", true, NUMBER);
testLexerSource("0.45", true, NUMBER);
testLexerSource("1.45", true, NUMBER);
testLexerSource("1e6", true, NUMBER);
testLexerSource("1.45e6", true, NUMBER);
testLexerSource(".45e6", true, NUMBER);
testLexerSource("-6", true, '-', NUMBER);
}
@Test
public void testNumbersSuffix() throws Exception {
testLexerSource("6f", true, NUMBER);
testLexerSource("6d", true, NUMBER);
testLexerSource("6l", true, NUMBER);
testLexerSource("6ll", true, NUMBER);
testLexerSource("6ul", true, NUMBER);
testLexerSource("6ull", true, NUMBER);
testLexerSource("6e3f", true, NUMBER);
testLexerSource("6e3d", true, NUMBER);
testLexerSource("6e3l", true, NUMBER);
testLexerSource("6e3ll", true, NUMBER);
testLexerSource("6e3ul", true, NUMBER);
testLexerSource("6e3ull", true, NUMBER);
}
@Test
public void testNumbersInvalid() throws Exception {
// testLexerSource("0x foo", true, INVALID, WHITESPACE, IDENTIFIER); // FAIL
testLexerSource("6x foo", true, INVALID, WHITESPACE, IDENTIFIER);
testLexerSource("6g foo", true, INVALID, WHITESPACE, IDENTIFIER);
testLexerSource("6xsd foo", true, INVALID, WHITESPACE, IDENTIFIER);
testLexerSource("6gsd foo", true, INVALID, WHITESPACE, IDENTIFIER);
}
@Test
public void testUnterminatedComment() throws Exception {
testLexerSource("5 /*", false, NUMBER, WHITESPACE, INVALID); // Bug #15
testLexerSource("5 //", false, NUMBER, WHITESPACE, CPPCOMMENT);
}
}
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