LoadingTestCollector.java revision e70f61b1160e953e5e4d18d30a463fa9ba821779 
1package junit.runner;
2
3import java.lang.reflect.*;
4import junit.runner.*;
5import junit.framework.*;
6
7/**
8 * An implementation of a TestCollector that loads
9 * all classes on the class path and tests whether
10 * it is assignable from Test or provides a static suite method.
11 * @see TestCollector
12 * {@hide} - Not needed for 1.0 SDK
13 */
14public class LoadingTestCollector extends ClassPathTestCollector {
15
16	TestCaseClassLoader fLoader;
17
18	public LoadingTestCollector() {
19		fLoader= new TestCaseClassLoader();
20	}
21
22	protected boolean isTestClass(String classFileName) {
23		try {
24			if (classFileName.endsWith(".class")) {
25				Class testClass= classFromFile(classFileName);
26				return (testClass != null) && isTestClass(testClass);
27			}
28		}
29		catch (ClassNotFoundException expected) {
30		}
31		catch (NoClassDefFoundError notFatal) {
32		}
33		return false;
34	}
35
36	Class classFromFile(String classFileName) throws ClassNotFoundException {
37		String className= classNameFromFile(classFileName);
38		if (!fLoader.isExcluded(className))
39			return fLoader.loadClass(className, false);
40		return null;
41	}
42
43	boolean isTestClass(Class testClass) {
44		if (hasSuiteMethod(testClass))
45			return true;
46		if (Test.class.isAssignableFrom(testClass) &&
47			Modifier.isPublic(testClass.getModifiers()) &&
48			hasPublicConstructor(testClass))
49			return true;
50		return false;
51	}
52
53	boolean hasSuiteMethod(Class testClass) {
54		try {
55			testClass.getMethod(BaseTestRunner.SUITE_METHODNAME, new Class[0]);
56	 	} catch(Exception e) {
57	 		return false;
58		}
59		return true;
60	}
61
62	boolean hasPublicConstructor(Class testClass) {
63		try {
64			TestSuite.getTestConstructor(testClass);
65		} catch(NoSuchMethodException e) {
66			return false;
67		}
68		return true;
69	}
70}
71