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Java > Open Source Codes > TestAlphabet


1 import lexer.Alphabet;
2
3 class TestAlphabet {
4     public static void main(String JavaDoc args[]) throws Exception JavaDoc {
5         // test Alphabet()
6 Alphabet alpha = new Alphabet();
7         if (alpha.size() != 0) {
8             throw new Exception JavaDoc("Alphabet() size error");
9         }
10
11         // test Alphabet(java.lang.String s)
12 StringBuffer JavaDoc sb = new StringBuffer JavaDoc();
13         for (char ch='a'; ch<'z'; ch++) {
14             sb.append(ch);
15             sb.append(ch); // each character two times in a row
16 }
17         String JavaDoc str = new String JavaDoc(sb);
18         alpha = new Alphabet(str);
19         if (alpha.size() != str.length()/2) {
20             if (alpha.size() != 0) {
21                 throw new Exception JavaDoc("Alphabet(String) size error");
22             }
23         }
24         for (int i = 0; i<str.length()/2; i++) {
25             if (alpha.getSymbol(i).charValue() != str.charAt(2*i)) {
26                 throw new Exception JavaDoc("Alphabet(String) content error");
27             }
28         }
29
30         // test Alphabet(Alphabet alpha)
31 Alphabet alpha2 = new Alphabet(alpha);
32         if (alpha2 == alpha) {
33             throw new Exception JavaDoc("Alphabet(Alphabet) same reference");
34         }
35         if (!alpha2.equals(alpha)) {
36             throw new Exception JavaDoc("Alphabet(Alphabet) not the same");
37         }
38
39         // Add symbol
40 int oldSize = alpha.size();
41         alpha.addSymbol(alpha.getSymbol(0).charValue()); // already in there
42 if (oldSize != alpha.size()) {
43             throw new Exception JavaDoc("addSymbol(char) addad a symbol twice");
44         }
45         char symbol = '+';
46         alpha.addSymbol(symbol);
47         if (oldSize+1 != alpha.size()) {
48             throw new Exception JavaDoc("addSymbol(char) symbol not added");
49         }
50         if (symbol != alpha.getSymbol(oldSize).charValue()) {
51             throw new Exception JavaDoc("addSymbol(char) symbol not added properly");
52         }
53
54         // Test clear
55 alpha2.clear();
56         if (alpha2.size() != 0) {
57             throw new Exception JavaDoc("clear(char) size error");
58         }
59
60         // Test toString()
61 System.out.println(alpha.toString());
62
63         // Test Other
64 alpha = new Alphabet("0124301");
65         for (char ch = 'a'; ch<='f'; ch++) {
66             alpha.addSymbol(ch);
67         }
68         alpha.print();
69         for (char ch = 'd'; ch<='h'; ch++) {
70             if (!alpha.containsSymbol(ch)) {
71                 System.out.println(ch+" is not in the alphabet");
72             } else {
73                 int idx = alpha.idxSymbol(ch);
74                 System.out.println("["+ch+"]="+idx);
75                 Character JavaDoc cObj = alpha.getSymbol(idx);
76                 if (cObj.charValue() != ch) {
77                     throw new Exception JavaDoc("Inconsistency found: idxSymbol - getSymbol");
78                 }
79             }
80         }
81     }
82 }
83
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