String credential = checkNotNull(
System.getProperty("test.credential." + provider),
"test.credential." + provider);
contexts.add(factory.createContext(provider, identity, credential, ImmutableSet
.of(new Log4JLoggingModule())));
urisToTest.add(String.format("blobstore://%s:%s@%s/%s/%s", identity, credential,
provider, container, path));
}