Github user afs commented on a diff in the pull request:
https://github.com/apache/jena/pull/314#discussion_r153755081
--- Diff:
jena-arq/src/test/java/org/apache/jena/sparql/core/assembler/TestDatasetAssembler.java
---
@@ -0,0 +1,122 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements. See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership. The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License. You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.apache.jena.sparql.core.assembler;
+
+import static java.nio.file.Files.createTempFile;
+import static org.apache.jena.assembler.JA.data;
+import static org.apache.jena.assembler.Mode.DEFAULT;
+import static org.apache.jena.rdf.model.ModelFactory.createDefaultModel;
+import static org.apache.jena.riot.Lang.NQUADS;
+import static org.apache.jena.riot.RDFDataMgr.write;
+import static org.apache.jena.vocabulary.RDF.type;
+
+import java.io.*;
+import java.nio.file.Path;
+
+import org.apache.jena.assembler.JA;
+import org.apache.jena.assembler.exceptions.CannotConstructException;
+import org.apache.jena.query.Dataset;
+import org.apache.jena.rdf.model.*;
+import org.apache.jena.sparql.core.*;
+import org.apache.jena.sparql.sse.SSE;
+import org.apache.jena.sparql.util.IsoMatcher;
+import org.apache.jena.system.Txn;
+import org.junit.Assert;
+import org.junit.Test;
+
+public class TestDatasetAssembler extends Assert {
--- End diff --
Having one or two tests that works from a Turtle string or would make for
clear tests of expected use.
With test for bad cases of mixed usage (general and TIM vocabulary
together) text written test cases will help generating tests.
---
