/** * Test method for {@link * RDFJSONUtility.kmr.scam.rest.util.RDFJSON#graphToRdfJsonPreordered(java.util.Set, * java.io.Writer)} . * * @throws JSONException */ @Test public void testModelToRdfJsonPreorderedSetOfStatementWriter() throws Exception { // final Set<Statement> testStatements = new TreeSet<Statement>(new StatementComparator()); final Model testStatements = new TreeModel(); final ValueFactoryImpl vf = ValueFactoryImpl.getInstance(); final BNode testBNode1 = vf.createBNode(); final BNode testBNode2 = vf.createBNode(); final URI testURI1 = vf.createURI("http://example.org/test/rdf/json/1"); final URI testURI2 = vf.createURI("http://my.test.org/rdf/type/2"); final URI testURI3 = vf.createURI("http://example.org/test/rdf/json/3"); final URI testURI4 = vf.createURI("http://example.org/test/rdf/json/4"); final URI testURI5 = vf.createURI("http://my.test.org/rdf/type/5"); final Statement testStatement1 = vf.createStatement(testURI1, testURI2, testURI3); testStatements.add(testStatement1); final Statement testStatement2 = vf.createStatement(testURI1, testURI2, testBNode1); testStatements.add(testStatement2); final Statement testStatement3 = vf.createStatement(testURI1, testURI2, testBNode2); testStatements.add(testStatement3); final Statement testStatement4 = vf.createStatement(testURI4, testURI2, testURI3); testStatements.add(testStatement4); final Statement testStatement5 = vf.createStatement(testURI4, testURI2, testBNode2); testStatements.add(testStatement5); final Statement testStatement6 = vf.createStatement(testURI4, testURI2, testBNode1); testStatements.add(testStatement6); final Statement testStatement7 = vf.createStatement(testBNode1, testURI5, testBNode2); testStatements.add(testStatement7); final Statement testStatement8 = vf.createStatement(testBNode1, testURI5, testURI1); testStatements.add(testStatement8); final Statement testStatement9 = vf.createStatement(testBNode1, testURI5, testURI4); testStatements.add(testStatement9); // RDFJSONUnitTest.log.info("testStatements=" + testStatements); Assert.assertEquals(9, testStatements.size()); // Verify that the statements are in an acceptable order (testStatement5 and testStatement6 // can be legitimately swapped) final Iterator<Statement> testStatementIterator = testStatements.iterator(); Assert.assertTrue(testStatementIterator.hasNext()); // testStatement7 should always be first by virtue of the fact that it has two blank nodes // and no other statements have two blank nodes Assert.assertEquals(testStatement7, testStatementIterator.next()); Assert.assertTrue(testStatementIterator.hasNext()); // Then testStatement8 Assert.assertEquals(testStatement8, testStatementIterator.next()); Assert.assertTrue(testStatementIterator.hasNext()); // Then testStatement9 Assert.assertEquals(testStatement9, testStatementIterator.next()); Assert.assertTrue(testStatementIterator.hasNext()); Rio.write(testStatements, this.testWriter, RDFFormat.RDFJSON); // RDFJSONUtility.modelToRdfJson(testStatements, this.testWriter, this.testWriterConfig); this.testOutput = this.testWriter.toString(); Assert.assertTrue(this.testOutput.length() > 0); Assert.assertTrue(this.testOutput.startsWith("{")); Assert.assertTrue(this.testOutput.endsWith("}")); // RDFJSONUnitTest.log.info("testOutput=" + this.testOutput); final int firstBlankNode = this.testOutput.indexOf("\"_:"); // Test that a bnode exists after the opening brace Assert.assertTrue(firstBlankNode > 0); // The first value after the first blank node should be a blank node identifier final int firstValue = this.testOutput.indexOf("\"value\" : \"_:", firstBlankNode); Assert.assertTrue("A suitable blank node value was not found", firstValue > 0); // This should be guaranteed by the indexOf contract, but doing a quick check anyway Assert.assertTrue(firstValue > firstBlankNode); // Do a quick check to see if the testOutput is valid JSON // FIXME: TODO: Test using Jackson // Assert.fail("TODO: Implement me using Jackson"); // final JSONObject testJSONObject = new JSONObject(this.testOutput); // Assert.assertNotNull(testJSONObject); // Assert.assertTrue(testJSONObject.length() > 0); // Assert.assertTrue(testJSONObject.names().length() > 0); // Assert.assertTrue(testJSONObject.keys().hasNext()); }