handler.expectNamespace("ex", "http://example.com/", "test", docURI, null);
handler.expectTriple(s, p, o, null, "test", docURI, null);
handler.expectCloseContext("test", docURI, null);
handler.expectEndDocument(docURI);
ExtractionContext context = new ExtractionContext("test", docURI);
blocker.openContext(context);
blocker.blockContext(context);
blocker.receiveNamespace("ex", "http://example.com/", context);
blocker.receiveTriple(s, p, o, null, context);
blocker.closeContext(context);