Transplant the test code from the old location

For some reason the app hangs after the test GUI is run

src/Mod/Draft/drafttests/test_dxf.py

@@ -39,6 +39,7 @@ import Draft
 from drafttests import auxiliary as aux
 from drafttests import test_base
 from draftutils.messages import _msg
+import importDXF
 
 
 class DraftDXF(test_base.DraftTestCaseDoc):
@@ -46,17 +47,49 @@ class DraftDXF(test_base.DraftTestCaseDoc):
 
     def test_read_dxf_Issue24314(self):
         """Verify that reading a DXF file does not leave pending Python error states"""
-        operation = "importDXF.import"
-        _msg("  Test '{}'".format(operation))
-        _msg("  This test requires a DXF file to read.")
 
         file = "Mod/Draft/drafttests/Issue24314.dxf"
         in_file = os.path.join(App.getHomePath(), file)
         _msg("  file={}".format(in_file))
         _msg("  exists={}".format(os.path.exists(in_file)))
 
-        obj = aux.fake_function(in_file)
-        self.assertFalse(obj, "'{}' failed".format(operation))
+        hGrp = App.ParamGet("User parameter:BaseApp/Preferences/Mod/Draft")
+
+        # Set options, doing our best to restore them:
+        wasShowDialog = hGrp.GetBool("dxfShowDialog", True)
+        wasUseLegacyImporter = hGrp.GetBool("dxfUseLegacyImporter", False)
+        wasUseLayers = hGrp.GetBool("dxfUseDraftVisGroups", True)
+        wasImportMode = hGrp.GetInt("DxfImportMode", 2)
+        wasCreateSketch = hGrp.GetBool("dxfCreateSketch", False)
+        wasImportAnonymousBlocks = hGrp.GetBool("dxfstarblocks", False)
+
+        doc = None
+        try:
+            # disable Preferences dialog in gui mode (avoids popup prompt to user)
+            hGrp.SetBool("dxfShowDialog", False)
+            # Use the new C++ importer -- that's where the bug was
+            hGrp.SetBool("dxfUseLegacyImporter", False)
+            # Preserve the DXF layers (makes the checking of document contents easier)
+            hGrp.SetBool("dxfUseDraftVisGroups", True)
+            # create simple part shapes (2 params)
+            # This is required to display the bug because creation of Draft objects clears out the
+            # pending exception this test is looking for, whereas creation of the simple shape object
+            # actually throws on the pending exception so the entity is absent from the document.
+            hGrp.SetInt("DxfImportMode", 2)
+            hGrp.SetBool("dxfCreateSketch", False)
+            hGrp.SetBool("dxfstarblocks", False)
+            doc = importDXF.open(in_file)
+            # This doc should have 3 objects: The Layers container, the DXF layer called 0, and one Line
+            self.assertEqual(len(doc.Objects), 3)
+        finally:
+            hGrp.SetBool("dxfShowDialog", wasShowDialog)
+            hGrp.SetBool("dxfUseLegacyImporter", wasUseLegacyImporter)
+            hGrp.SetBool("dxfUseDraftVisGroups", wasUseLayers)
+            hGrp.SetInt("DxfImportMode", wasImportMode)
+            hGrp.SetBool("dxfCreateSketch", wasCreateSketch)
+            hGrp.SetBool("dxfstarblocks", wasImportAnonymousBlocks)
+            if doc:
+                App.closeDocument(doc.Name)
 
     def test_export_dxf(self):
         """Create some figures and export them to a DXF file."""