diff --git a/src/test/java/UnifyTest.java b/src/test/java/UnifyTest.java
index 6f75a89..5661c72 100644
--- a/src/test/java/UnifyTest.java
+++ b/src/test/java/UnifyTest.java
@@ -81,5 +81,126 @@ public class UnifyTest {
         Set<Set<UnifyPair>> solution = unifyAlgo.unify(undConstraints, oderConstraints, finiteClosure, new NullWriter(), false, urm, tasks);
         System.out.println(solution.size());
         //System.out.println(solution);
-    }}
+    }
+
+    @Test
+    public void matrixTest(){
+        UnifyType type1;
+        UnifyType type2;
+        Set<UnifyPair> undConstraints = new HashSet<>();
+
+        //und-constraints
+        //Matrix <. ret
+        type1 = new ReferenceType("Matrix");
+        type2 = new PlaceholderType("ret");
+        undConstraints.add(new UnifyPair(type1, type2, PairOperator.SMALLERDOT));
+        //Integer <. i
+        type1 = new ReferenceType("Integer");
+        type2 = new PlaceholderType("i");
+        undConstraints.add(new UnifyPair(type1, type2, PairOperator.SMALLERDOT));
+        //Matrix <. Vector<x?>
+        type1 = new ReferenceType("Matrix");
+        type2 = new ReferenceType("Vector", new TypeParams(new PlaceholderType("x")));
+        undConstraints.add(new UnifyPair(type1, type2, PairOperator.SMALLERDOT));
+        //x? <. v1
+        type1 = new PlaceholderType("x");
+        type2 = new PlaceholderType("v1");
+        undConstraints.add(new UnifyPair(type1, type2, PairOperator.SMALLERDOT));
+        //i <. Integer
+        type1 = new PlaceholderType("i");
+        type2 = new ReferenceType("Integer");
+        undConstraints.add(new UnifyPair(type1, type2, PairOperator.SMALLERDOT));
+        //Vector<Integer> <. v2
+        type1 = new ReferenceType("Vector", new TypeParams(new ReferenceType("Integer")));
+        type2 = new PlaceholderType("v2");
+        undConstraints.add(new UnifyPair(type1, type2, PairOperator.SMALLERDOT));
+        //v1 <. Vector<y?>
+        type1 = new PlaceholderType("v1");
+        type2 = new ReferenceType("Vector", new TypeParams(new PlaceholderType("y")));
+        undConstraints.add(new UnifyPair(type1, type2, PairOperator.SMALLERDOT));
+        //m <. Vector<z?>
+        type1 = new PlaceholderType("m");
+        type2 = new ReferenceType("Vector", new TypeParams(new PlaceholderType("z")));
+        undConstraints.add(new UnifyPair(type1, type2, PairOperator.SMALLERDOT));
+        //z? <. zr
+        type1 = new PlaceholderType("z");
+        type2 = new PlaceholderType("zr");
+        undConstraints.add(new UnifyPair(type1, type2, PairOperator.SMALLERDOT));
+        //zr <. Vector<z2?>
+        type1 = new PlaceholderType("zr");
+        type2 = new ReferenceType("Vector", new TypeParams(new PlaceholderType("z2")));
+        undConstraints.add(new UnifyPair(type1, type2, PairOperator.SMALLERDOT));
+        //z2? <. z2r
+        type1 = new PlaceholderType("z2");
+        type2 = new PlaceholderType("z2r");
+        undConstraints.add(new UnifyPair(type1, type2, PairOperator.SMALLERDOT));
+        //z2r <. Integer
+        type1 = new PlaceholderType("z2r");
+        type2 = new ReferenceType("Integer");
+        undConstraints.add(new UnifyPair(type1, type2, PairOperator.SMALLERDOT));
+        //v1 <. Vector<y2?>
+        type1 = new PlaceholderType("v1");
+        type2 = new ReferenceType("Vector", new TypeParams(new PlaceholderType("y2")));
+        undConstraints.add(new UnifyPair(type1, type2, PairOperator.SMALLERDOT));
+        //y2? <. y2r
+        type1 = new PlaceholderType("y2");
+        type2 = new PlaceholderType("y2r");
+        undConstraints.add(new UnifyPair(type1, type2, PairOperator.SMALLERDOT));
+        //y2r <. Integer
+        type1 = new PlaceholderType("y2r");
+        type2 = new ReferenceType("Integer");
+        undConstraints.add(new UnifyPair(type1, type2, PairOperator.SMALLERDOT));
+        //v2 <. Vector<x3?>
+        type1 = new PlaceholderType("v2");
+        type2 = new ReferenceType("Vector", new TypeParams(new PlaceholderType("x3")));
+        undConstraints.add(new UnifyPair(type1, type2, PairOperator.SMALLERDOT));
+        //x3? <. x3r
+        type1 = new PlaceholderType("x3");
+        type2 = new PlaceholderType("x3r");
+        undConstraints.add(new UnifyPair(type1, type2, PairOperator.SMALLERDOT));
+        //Integer <. x3r
+        type1 = new ReferenceType("Integer");
+        type2 = new PlaceholderType("x3r");
+        undConstraints.add(new UnifyPair(type1, type2, PairOperator.SMALLERDOT));
+        //ret <. Vector<x2?>
+        type1 = new PlaceholderType("ret");
+        type2 = new ReferenceType("Vector", new TypeParams(new PlaceholderType("x2")));
+        undConstraints.add(new UnifyPair(type1, type2, PairOperator.SMALLERDOT));
+        //x2? <. x2r
+        type1 = new PlaceholderType("x2");
+        type2 = new PlaceholderType("x2r");
+        undConstraints.add(new UnifyPair(type1, type2, PairOperator.SMALLERDOT));
+        //v2 <. x2r
+        type1 = new PlaceholderType("v2");
+        type2 = new PlaceholderType("x2r");
+        undConstraints.add(new UnifyPair(type1, type2, PairOperator.SMALLERDOT));
+
+        //oder-constraints
+        List<Set<Constraint<UnifyPair>>> oderConstraints = new ArrayList<>();
+
+        //FiniteClosure
+        Set<UnifyPair> constraints = new HashSet<>();
+        //Matrix extends Vector<Vector<Integer>>
+        type1 = new ReferenceType("Matrix");
+        type2 = new ReferenceType("Vector", new TypeParams(new ReferenceType("Vector", new TypeParams(new ReferenceType("Integer")))));
+        constraints.add(new UnifyPair(type1, type2, PairOperator.SMALLER));
+        //Vector<X> extends Object
+        type1 = new ReferenceType("Vector", new TypeParams(new ReferenceType("X")));
+        type2 = new ReferenceType("Object");
+        constraints.add(new UnifyPair(type1, type2, PairOperator.SMALLER));
+        //Integer extends Object
+        type1 = new ReferenceType("Integer");
+        type2 = new ReferenceType("Object");
+        constraints.add(new UnifyPair(type1, type2, PairOperator.SMALLER));
+        FiniteClosure finiteClosure = new FiniteClosure(constraints, new NullWriter());
+
+        TypeUnify unifyAlgo = new TypeUnify();
+        ConstraintSet< Pair> cons = new ConstraintSet<>();
+        UnifyResultModel urm = new UnifyResultModel(cons, finiteClosure);
+        UnifyTaskModel tasks = new UnifyTaskModel();
+        Set<Set<UnifyPair>> solution = unifyAlgo.unify(undConstraints, oderConstraints, finiteClosure, new NullWriter(), false, urm, tasks);
+        System.out.println(solution);
+        System.out.println(solution.size());
+    }
+}