public void testInvalidRegionName() {
		Collection<String> invalidNames = new ArrayList<String>();
		invalidNames.addAll(Arrays.asList(":", "bad:Name", ":bad::name:", ":badname", "badname:"));
		invalidNames.addAll(Arrays.asList("=", "bad=Name", "=bad==name=", "=badname", "badname="));
		invalidNames.addAll(Arrays.asList("\n", "bad\nName", "\nbad\n\nname\n", "\nbadname", "badname\n"));
		invalidNames.addAll(Arrays.asList("*", "bad*Name", "*bad**name*", "*badname", "badname*"));
		invalidNames.addAll(Arrays.asList("?", "bad?Name", "?bad??name?", "?badname", "badname?"));
		invalidNames.addAll(Arrays.asList(",", "bad,Name", ",bad,,name,", ",badname", "badname,"));
		invalidNames.addAll(Arrays.asList("\"", "bad\"Name", "\"bad\"\"name\"", "\"badname", "badname\""));
		invalidNames.addAll(Arrays.asList("\\", "bad\\Name", "\\bad\\\\name\\", "\\badname", "badname\\"));

		for (String invalidName : invalidNames) {
			try {
				digraph.createRegion(invalidName);
				fail("Expected failure to create region.");
			} catch (IllegalArgumentException e) {
				// expected
			} catch (BundleException e) {
				fail("Unexpected bundle exception: " + e.getMessage());
			}
		}

	}