rdf.tests: add test loading multiple formats in flipped order

This test was failing when running from OSGi, due to RIOT not starting
correctly when Jena was not packaged as an uber-JAR.

tests/org.eclipse.epsilon.emc.rdf.tests/src/org/eclipse/epsilon/emc/rdf/RDFModelMultipleUriTest.java

@@ -21,10 +21,10 @@
 public class RDFModelMultipleUriTest {
 
 	private static final String SPIDERMAN_TTL = "resources/spiderman.ttl";
-	private static final String FOAF_RDFXML = "resources/foaf.rdfxml";
+	private static final String FOAF_RDFXML = "resources/foaf.rdf";
 
 	@Test
-	public void classIsAvailable() throws Exception {
+	public void ttlThenRDFXML() throws Exception {
 		try (RDFModel model = new RDFModel()) {
 			model.getUris().add(getAbsoluteURI(SPIDERMAN_TTL));
 			model.getUris().add(getAbsoluteURI(FOAF_RDFXML));
@@ -34,6 +34,17 @@ public void classIsAvailable() throws Exception {
 		}
 	}
 
+	@Test
+	public void rdfXMLThenTTL() throws Exception {
+		try (RDFModel model = new RDFModel()) {
+			model.getUris().add(getAbsoluteURI(FOAF_RDFXML));
+			model.getUris().add(getAbsoluteURI(SPIDERMAN_TTL));
+			model.load();
+
+			assertEquals("The FOAF vocabulary has 13 classes", 13, model.getAllOfType("Class").size());
+		}
+	}
+
 	private String getAbsoluteURI(String path) {
 		return new File(path).getAbsoluteFile().toURI().toString();
 	}