Issue253 coverage (#564)

* add coverage script from Mans with changes based on review in #315 #243

* add unit-test and fix minor bug

* Catch case for no examples

buildingspy/CHANGES.txt

@@ -4,6 +4,9 @@ BuildingsPy Changelog
 Version 5.2.0, xxxx
 ^^^^^^^^^^^^^^^^^^^
 
+- In buildingspy/development/regressiontest.py, add option to get the coverage
+  rate, i.e., what percentage of examples are covered by regression tests.
+  (https://github.com/lbl-srg/BuildingsPy/issues/253)
 - In buildingspy/development/regressiontest.py, add option to create reference
   results in batch mode.
   (https://github.com/lbl-srg/BuildingsPy/issues/560)

buildingspy/development/regressiontest.py

@@ -597,7 +597,6 @@ def getModelicaCommand(self):
         elif self._modelica_tool != 'dymola':
             return 'jm_ipython.sh'
         else:
-            return "C://Program Files//Dymola 2023x//bin64//Dymola"
             return self._modelica_tool
 
     def isExecutable(self, program):
@@ -4355,7 +4354,7 @@ def getCoverage(self):
                     ) and not filepath.endswith(('package.mo', '.order')):
                         all_examples.append(filepath)
 
-        n_tested_examples = len(temp_data)
+        n_tested_examples = len(self._data)
         n_examples = len(all_examples)
         if n_examples > 0:
             coverage = round(n_tested_examples / n_examples, 2) * 100