def testcases():
manifest = Manifest(open_data_file('rdfcore/Manifest.rdf'))
rdf_suite = RDFTestSuite.from_manifest(manifest, opener=TEST_OPENER)
if not TEST_URIS:
return rdf_suite
else:
suite = RDFTestSuite()
for test in rdf_suite:
if test.id() in TEST_URIS:
suite.addTest(test)
return suite
