Fixed a test that was failing on Windows.

vasl_templates/webapp/tests/control_tests_servicer.py

@@ -174,6 +174,10 @@ class ControlTestsServicer( BaseControlTestsServicer ): #pylint: disable=too-man
         """End a test run."""
         self._log_request( request, context )
         # end the test run
+        # NOTE: If the active VaslMod has loaded any extension files from our temp directory, since they are
+        # kept open for the duration, we need to clean up the VaslMod (so that it will close these files),
+        # otherwise we may not be able to clean up our temp file directory.
+        webapp_vasl_mod.set_vasl_mod( None, None )
         self.cleanup()
         return Empty()
 

vasl_templates/webapp/vasl_mod.py

@@ -172,6 +172,13 @@ class VaslMod:
         if self.vasl_version not in SUPPORTED_VASL_MOD_VERSIONS:
             _logger.warning( "Unsupported VASL version: %s", self.vasl_version )
 
+    def __del__( self ):
+        # clean up
+        # NOTE: We keep our module and extension ZIP files open for the duration (so we can
+        # read images out of them on demand), so we need to make sure we close them here.
+        for f in self._files:
+            f[0].close()
+
     def get_piece_image( self, gpid, side, index ):
         """Get the image for the specified piece."""