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1 package tests.jfun.parsec;
2
3 import jfun.parsec.Parser;
4 import jfun.parsec.Parsers;
5 import jfun.parsec.Scanners;
6 import junit.framework.TestCase;
7
8 public class SimpleParserTestCase extends TestCase {
9 public void testOrShouldRecoverError(){
10 Parser<Object  > parser = Parsers.or(
11 Scanners.isChar('a').seq(Scanners.isChar('b')).seq(Parsers.retn(new Character ('b'))),
12 Scanners.isString("aa").seq(Parsers.retn("aa"))
13 );
14 verify("aaa", "aa", parser);
15 verify("ab", new Character ('b'), parser);
16 }
17 public void testAltShouldRecoverError() {
18 Parser<String > parser = Parsers.alt(
19 Scanners.isChar('a').seq(Scanners.isChar('b')).seq(Parsers.retn("ab")),
20 Scanners.isString("aa").seq(Parsers.retn("aa"))
21 );
22 verify("aaa", "aa", parser);
23 verify("ab", "ab", parser);
24 }
25 private static void verify(String code, Object expected, Parser parser){
26 assertEquals(expected, parser.parse(code));
27 }
28 }
29 |
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