[test_FMIExport] fix due to OMCPath usage

Author: syntron

tests/test_FMIExport.py

@@ -1,12 +1,13 @@
 import OMPython
 import shutil
 import os
+import pathlib
 
 
 def test_CauerLowPassAnalog():
     mod = OMPython.ModelicaSystem(modelName="Modelica.Electrical.Analog.Examples.CauerLowPassAnalog",
                                   lmodel=["Modelica"])
-    tmp = mod.getWorkDirectory()
+    tmp = pathlib.Path(mod.getWorkDirectory())
     try:
         fmu = mod.convertMo2Fmu(fileNamePrefix="CauerLowPassAnalog")
         assert os.path.exists(fmu)
@@ -16,7 +17,7 @@ def test_CauerLowPassAnalog():
 
 def test_DrumBoiler():
     mod = OMPython.ModelicaSystem(modelName="Modelica.Fluid.Examples.DrumBoiler.DrumBoiler", lmodel=["Modelica"])
-    tmp = mod.getWorkDirectory()
+    tmp = pathlib.Path(mod.getWorkDirectory())
     try:
         fmu = mod.convertMo2Fmu(fileNamePrefix="DrumBoiler")
         assert os.path.exists(fmu)