@SuppressWarnings("unchecked")
private void doTestCache() {
for (int i = 0; i < toConstruct.length; i++) {
Class cl = toConstruct[i];
Object x = ReflectionUtils.newInstance(cl, null);
Object y = ReflectionUtils.newInstance(cl, null);
assertEquals(cl, x.getClass());
assertEquals(cl, y.getClass());
}
}
@Test
public void testCantCreate() {
try {
ReflectionUtils.newInstance(NoDefaultCtor.class, null);
fail("invalid call should fail");
} catch (RuntimeException rte) {
assertEquals(NoSuchMethodException.class, rte.getCause().getClass());
}
}
@SuppressWarnings("unchecked")
@Test
public void testCacheDoesntLeak() throws Exception {
int iterations = 9999; // very fast, but a bit less reliable - bigger numbers force GC
for (int i = 0; i < iterations; i++) {
URLClassLoader loader = new URLClassLoader(new URL[0], getClass().getClassLoader());
Class cl =
Class.forName("org.apache.hadoop.util.TestReflectionUtils$LoadedInChild", false, loader);
Object o = ReflectionUtils.newInstance(cl, null);
assertEquals(cl, o.getClass());
}
System.gc();
assertTrue(cacheSize() + " too big", cacheSize() < iterations);
}