Enable Python Draft import tests

A failing test was added to Draft tests to ensure CI catches it

src/Mod/Draft/TestDraft.py

@@ -106,7 +106,8 @@ from drafttests.test_draftgeomutils import TestDraftGeomUtils as DraftTest04
 
 # Handling of file formats tests
 # from drafttests.test_svg import DraftSVG as DraftTest05
-# from drafttests.test_dxf import DraftDXF as DraftTest06
+from drafttests.test_dxf import DraftDXF as DraftTest06
+
 # from drafttests.test_dwg import DraftDWG as DraftTest07
 # from drafttests.test_oca import DraftOCA as DraftTest08
 # from drafttests.test_airfoildat import DraftAirfoilDAT as DraftTest09
@@ -118,7 +119,7 @@ True if DraftTest02 else False
 True if DraftTest03 else False
 True if DraftTest04 else False
 # True if DraftTest05 else False
-# True if DraftTest06 else False
+True if DraftTest06 else False
 # True if DraftTest07 else False
 # True if DraftTest08 else False
 # True if DraftTest09 else False

src/Mod/Draft/drafttests/test_dxf.py

@@ -56,7 +56,7 @@ class DraftDXF(test_base.DraftTestCaseDoc):
         _msg("  exists={}".format(os.path.exists(in_file)))
 
         obj = aux.fake_function(in_file)
-        self.assertTrue(obj, "'{}' failed".format(operation))
+        self.assertFalse(obj, "'{}' failed".format(operation))
 
     def test_export_dxf(self):
         """Create some figures and export them to a DXF file."""