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1 package org.junit.internal.runners;
2
3 import java.lang.annotation.Annotation  ;
4 import java.lang.reflect.Method ;
5 import java.lang.reflect.Modifier ;
6 import java.util.ArrayList ;
7 import java.util.List ;
8
9 import org.junit.After;
10 import org.junit.AfterClass;
11 import org.junit.Before;
12 import org.junit.BeforeClass;
13 import org.junit.Test;
14
15 public class MethodValidator {
16 private final TestIntrospector fIntrospector;
17
18 private final List <Throwable > fErrors= new ArrayList <Throwable >();
19
20 private final Class <?> fTestClass;
21
22 public MethodValidator(Class <?> testClass) {
23 fTestClass= testClass;
24 fIntrospector= new TestIntrospector(testClass);
25 }
26
27 public void validateInstanceMethods() {
28 validateTestMethods(After.class, false);
29 validateTestMethods(Before.class, false);
30 validateTestMethods(Test.class, false);
31 }
32
33 public void validateStaticMethods() {
34 validateTestMethods(BeforeClass.class, true);
35 validateTestMethods(AfterClass.class, true);
36 }
37
38 public List <Throwable > validateMethodsForDefaultRunner() {
39 validateNoArgConstructor();
40 validateStaticMethods();
41 validateInstanceMethods();
42 return fErrors;
43 }
44
45 public void assertValid() throws InitializationError {
46 if (!fErrors.isEmpty())
47 throw new InitializationError(fErrors);
48 }
49
50 public void validateNoArgConstructor() {
51 try {
52 fTestClass.getConstructor();
53 } catch (Exception e) {
54 fErrors.add(new Exception ("Test class should have public zero-argument constructor", e));
55 }
56 }
57
58 private void validateTestMethods(Class <? extends Annotation > annotation,
59 boolean isStatic) {
60 List <Method > methods= fIntrospector.getTestMethods(annotation);
61 for (Method each : methods) {
62 if (Modifier.isStatic(each.getModifiers()) != isStatic) {
63 String state= isStatic ? "should" : "should not";
64 fErrors.add(new Exception ("Method " + each.getName() + "() "
65 + state + " be static"));
66 }
67 if (!Modifier.isPublic(each.getDeclaringClass().getModifiers()))
68 fErrors.add(new Exception ("Class " + each.getDeclaringClass().getName()
69 + " should be public"));
70 if (!Modifier.isPublic(each.getModifiers()))
71 fErrors.add(new Exception ("Method " + each.getName()
72 + " should be public"));
73 if (each.getReturnType() != Void.TYPE)
74 fErrors.add(new Exception ("Method " + each.getName()
75 + " should be void"));
76 if (each.getParameterTypes().length != 0)
77 fErrors.add(new Exception ("Method " + each.getName()
78 + " should have no parameters"));
79 }
80 }
81 }
82 |
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