KickJava   Java API By Example, From Geeks To Geeks.

Java > Open Source Codes > org > codehaus > groovy > syntax > parser > AbstractMethodCheckTest


1
2
3 /*
4 interface Comparable { int compareTo(Object o); }
5 abstract class GString { abstract String[] getStrings(); }
6 interface CharSequence {
7     char charAt(int); int length(); CharSequence subsequence(int, int); String toString()
8 }
9
10 abstract class AbstractList: { abstract Object get(int index); abstract int size(); }
11
12 */
13
14 package org.codehaus.groovy.syntax.parser;
15
16 import groovy.lang.GroovyObject;
17 import groovy.lang.MissingClassException;
18 import groovy.lang.MissingPropertyException;
19
20 import java.io.ByteArrayInputStream JavaDoc;
21
22 import org.codehaus.groovy.classgen.RuntimeIncompleteClassException;
23 import org.codehaus.groovy.classgen.TestSupport;
24 import org.codehaus.groovy.control.CompilationFailedException;
25
26 public class AbstractMethodCheckTest extends TestSupport {
27
28
29     /**
30      * GString literals generate an anonymous inner class which
31      * adds an implementation of the abstract String[] getStrings()
32      * method.
33      */
34     public void testAnonymousGStringAbstract() throws Exception JavaDoc {
35     GroovyObject object =
36         assertCompileWorks(
37                "class GStringTest {\n" +
38                " public groovy.lang.GString testGStringAbstract(Integer x, Integer y) {\n" +
39                " return \"GStringTest of ${x} and ${y}\"\n" +
40                " }\n" +
41                "}\n");
42
43     }
44
45     public void testCompleteComparable() throws Exception JavaDoc {
46     GroovyObject object =
47         assertCompileWorks(
48          "class ComparableTest implements java.lang.Comparable {\n" +
49          " int compareTo(java.lang.Object o) {\n" +
50          " return 0;\n" +
51          " }\n" +
52          "}\n");
53     }
54
55
56     public void testIncompleteCharSequence() throws Exception JavaDoc {
57     // Should generate an error for not implementing subsequence
58 MissingClassException e =
59         assertCompileFailed(
60            "class IncompleteCharSequenceTest implements java.lang.CharSequence {\n" +
61            " char charAt(int pos) {\n" +
62            " return 'a';\n" +
63            " }\n" +
64            "\n" +
65            " int length() {\n" +
66            " return 5;\n" +
67            " }\n" +
68            "}\n");
69     }
70
71     public void testCompleteCharSequence() throws Exception JavaDoc {
72     GroovyObject object =
73         assertCompileWorks(
74               "class CompleteCharSequenceTest implements java.lang.CharSequence {\n" +
75           " char charAt(int pos) {\n" +
76           " return 'a';\n" +
77           " }\n" +
78           "\n" +
79           " int length() {\n" +
80           " return 5;\n" +
81           " }\n" +
82           "\n" +
83           " java.lang.CharSequence subSequence(int start, int end) {\n" +
84           " return null;\n" +
85           " }\n" +
86           "}\n");
87     }
88
89
90     public void testIncompleteList() throws Exception JavaDoc {
91     // Should generate an error for not implementing Object get(int)
92 MissingClassException e =
93         assertCompileFailed(
94                "class IncompleteList extends java.util.AbstractList {\n" +
95            " int size() { return 0; }\n" +
96            "}\n");
97     }
98
99
100     public void testCompleteList() throws Exception JavaDoc {
101     GroovyObject object =
102         assertCompileWorks(
103                "class CompleteList extends java.util.AbstractList {\n" +
104            " int size() { return 0; }\n" +
105            " Object get(int pos) { return null; }\n" +
106            "}\n");
107     }
108
109     
110     protected GroovyObject assertCompileWorks(String JavaDoc code) throws Exception JavaDoc {
111         Class JavaDoc type =
112             loader.parseClass(new ByteArrayInputStream JavaDoc(code.getBytes()), "ValidClass_" + getMethodName() + ".groovy");
113         return (GroovyObject) type.newInstance();
114     }
115
116     protected MissingClassException assertCompileFailed(String JavaDoc code) throws Exception JavaDoc {
117         try {
118             assertCompileWorks(code);
119
120             fail("Should have thrown an exception");
121         }
122         catch( CompilationFailedException e ) {
123             Exception JavaDoc cause = e.getUnit().getException(0);
124             if( cause instanceof RuntimeIncompleteClassException ) {
125                 System.out.println("Worked, threw: " + cause);
126                 //e.printStackTrace();
127 return null;
128             }
129             throw e;
130         }
131         return null;
132     }
133
134 }
135
Popular Tags