added getTests to serializer

de.fhmuenster.masterthesis.textgeneratordsl/src/de/fhmuenster/masterthesis/serialization/TestgeneratorDSLSerializer.java

@@ -371,6 +371,13 @@ public class TestgeneratorDSLSerializer {
 				.collect(Collectors.toList()); //
 	}
 	
+	public List<Test> getTests() {
+		return model.getDeclarations().stream() //
+				.filter(d -> d instanceof Test) //
+				.map(test -> ((Test) test)) //
+				.collect(Collectors.toList()); //
+	}
+	
 	public List<Loop> getLoops() {
 		return model.getDeclarations().stream() //
 			.filter(l -> l instanceof Loop) //