Added test for ForwardRuleReasonerOWLHorst R4 rule

Author: patrickwestphal

sansa-inference-spark/src/test/resources/forward_chaining/axioms/test_r4.owl

@@ -0,0 +1,37 @@
+Prefix(:=<http://ex.com/default#>)
+
+Ontology(<http://ex.com/ont/sample1.owl>
+  <http://ex.com/ont/release/123/sample1.owl>
+
+  Declaration(Class(:Cls01))
+  Declaration(Class(:Cls02))
+  Declaration(Class(:Cls03))
+
+  Declaration(NamedIndividual(:indivA))
+  Declaration(NamedIndividual(:indivB))
+  Declaration(NamedIndividual(:indivC))
+  Declaration(NamedIndividual(:indivD))
+  Declaration(NamedIndividual(:indivE))
+  Declaration(NamedIndividual(:indivF))
+
+  Declaration(ObjectProperty(:objProp01))
+  Declaration(ObjectProperty(:objProp02))
+  ObjectPropertyDomain(:objProp02 :Cls01)
+
+  Declaration(DataProperty(:dataProp01))
+  Declaration(DataProperty(:dataProp02))
+  DataPropertyDomain(:dataProp02 :Cls02)
+
+  Declaration(AnnotationProperty(:annProp01))
+  Declaration(AnnotationProperty(:annProp02))
+  AnnotationPropertyDomain(:annProp02 :Cls03)
+
+  ObjectPropertyAssertion(:objProp01 :indivA :indivB)
+  ObjectPropertyAssertion(:objProp02 :indivB :indivC)
+
+  DataPropertyAssertion(:dataProp01 :indivC "ABCD")
+  DataPropertyAssertion(:dataProp02 :indivD "DCBA")
+
+  AnnotationAssertion(:annProp01 :indivE "wxyz")
+  AnnotationAssertion(:annProp02 :indivF "zyxw")
+)

sansa-inference-spark/src/test/scala/net/sansa_stack/inference/spark/forwardchaining/axioms/ForwardRuleReasonerOWLHorstTest.scala

@@ -175,6 +175,38 @@ class ForwardRuleReasonerOWLHorstTest extends FunSuite with SharedSparkContext w
     assert(inferred.contains(
       df.getOWLAnnotationAssertionAxiom(annProp01, indivA.getIRI,
         df.getOWLLiteral("wxyz"))))
+  }
+
+  /**
+    * R4:
+    *   Condition:
+    *     s rdfs:domain x
+    *     u s y
+    *   Consequence:
+    *     u rdf:type x
+    */
+  test("Rule R4 should return correct results") {
+    val cls01 = df.getOWLClass(defaultPrefix + "Cls01")
+    val cls02 = df.getOWLClass(defaultPrefix + "Cls02")
+    val cls03 = df.getOWLClass(defaultPrefix + "Cls03")
+    val indivB = df.getOWLNamedIndividual(defaultPrefix + "indivB")
+    val indivD = df.getOWLNamedIndividual(defaultPrefix + "indivD")
+    val indivF = df.getOWLNamedIndividual(defaultPrefix + "indivF")
+
+    val input = getClass.getResource(resourcePath + "test_r4.owl").getPath
+
+    val axiomsRDD = spark.owl(Syntax.FUNCTIONAL)(input)
+    val reasoner = new ForwardRuleReasonerOWLHorst(sc, sc.defaultMinPartitions)
+    val inferred: Seq[OWLAxiom] = reasoner.apply(axiomsRDD).collect()
+
+    // Three axioms should be inferred:
+    // ClassAssertion(:Cls01 :indivB)
+    // ClassAssertion(:Cls02 :indivD)
+    // ClassAssertion(:Cls03 :indivF)
+    assert(inferred.size == 3)
+    assert(inferred.contains(df.getOWLClassAssertionAxiom(cls01, indivB)))
+    assert(inferred.contains(df.getOWLClassAssertionAxiom(cls02, indivD)))
+    assert(inferred.contains(df.getOWLClassAssertionAxiom(cls03, indivF)))
 
   }
 }