Index: DamEngine/trunk/src/Deltares.DamEngine.Interface.Tests/ConversionHelperTests.cs
===================================================================
diff -u -r1589 -r1611
--- DamEngine/trunk/src/Deltares.DamEngine.Interface.Tests/ConversionHelperTests.cs	(.../ConversionHelperTests.cs)	(revision 1589)
+++ DamEngine/trunk/src/Deltares.DamEngine.Interface.Tests/ConversionHelperTests.cs	(.../ConversionHelperTests.cs)	(revision 1611)
@@ -643,5 +643,22 @@
             Assert.AreEqual(inputTimeStepUnit, ConversionHelper.ConvertToInputTimeStepUnit(timeStepUnit));
         }
 
+        [TestCase(ConversionHelper.PlLineTypePl1, PlLineType.Pl1)]
+        [TestCase(ConversionHelper.PlLineTypePl2, PlLineType.Pl2)]
+        [TestCase(ConversionHelper.PlLineTypePl3, PlLineType.Pl3)]
+        [TestCase(ConversionHelper.PlLineTypePl4, PlLineType.Pl4)]
+        public void CanConvertToPlLineType(uint inputPlLineType, PlLineType plLineType)
+        {
+            Assert.AreEqual(plLineType, ConversionHelper.ConvertToPlLineType(inputPlLineType));
+        }
+
+        [TestCase(PlLineType.Pl1, ConversionHelper.PlLineTypePl1)]
+        [TestCase(PlLineType.Pl2, ConversionHelper.PlLineTypePl2)]
+        [TestCase(PlLineType.Pl3, ConversionHelper.PlLineTypePl3)]
+        [TestCase(PlLineType.Pl4, ConversionHelper.PlLineTypePl4)]
+        public void CanConvertToInputPlLineType(PlLineType plLineType, uint inputPlLineType)
+        {
+            Assert.AreEqual(inputPlLineType, ConversionHelper.ConvertToInputPlLineType(plLineType));
+        }
     }
 }