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1 package tests.jfun.parsec;
2
3 import jfun.parsec.Lexers;
4 import jfun.parsec.Map;
5 import jfun.parsec.Maps;
6 import jfun.parsec.Parser;
7 import jfun.parsec.Parsers;
8 import jfun.parsec.Scanners;
9 import jfun.parsec.Tok;
10 import jfun.parsec.Tokenizer;
11 import jfun.parsec._;
12 import jfun.parsec.pattern.Patterns;
13 import jfun.parsec.tokens.Tokenizers;
14 import junit.framework.TestCase;
15
16 public class SimpleInterpolationTestCase extends TestCase {
17 private static class Var{
18 private final String  name;
19
20 public Var(String name) {
21 this.name = name;
22 }
23
24 public String getName() {
25 return name;
26 }
27
28 @Override
29 public String toString() {
30 return name;
31 }
32
33 @Override
34 public boolean equals(Object obj) {
35 if(obj instanceof Var){
36 return name.equals(((Var)obj).name);
37 }
38 else return false;
39 }
40
41 }
42 private static Parser<Object []> getParser(){
43 final Parser<_> fragment = Scanners.isPattern(Patterns.notString("${").many1(), "literal");
44 final Parser<Object > literal = Lexers.lexer(fragment, Tokenizers.forString()).map(Maps.toToken());
45 final Parser<Object > word = Lexers.lexer(
46 Scanners.isPattern(Patterns.isWord(), "variable"),
47 new Tokenizer(){
48 public Object toToken(CharSequence cs, int from, int len) {
49 return new Var(cs.subSequence(from, from+len).toString().trim());
50 }
51 }
52 ).map(Maps.toToken());
53 final Parser<Object > var = Parsers.between(Scanners.isString("${"), Scanners.isChar('}'), word);
54 final Parser<Object > element = Parsers.plus(literal, var);
55 return element.many(Object .class);
56 }
57 public void testSimpleString(){
58 verifyResult("abc", "abc");
59 }
60 public void testEmptyString(){
61 verifyResult("");
62 }
63 public void testOneVariable(){
64 verifyResult("${var1}", new Var("var1"));
65 }
66 public void testTwoVariables(){
67 verifyResult("hello ${name}, today is ${today}.", "hello ", new Var("name"), ", today is ", new Var("today"), ".");
68 }
69 private static void verifyResult(String src, Object ... expected){
70 Object [] result = getParser().parse(src);
71 assertEquals(expected.length, result.length);
72 for(int i=0; i<expected.length; i++){
73 assertEquals(expected[i], result[i]);
74 }
75 }
76 }
77 |
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