Add FreeCAD CI regression test suite

.github/workflows/tests.yml

@@ -0,0 +1,46 @@
+name: FreeCAD tests
+
+on:
+  push:
+  pull_request:
+
+permissions:
+  contents: read
+
+jobs:
+  tests:
+    runs-on: ubuntu-latest
+    strategy:
+      fail-fast: false
+      matrix:
+        freecad: ["1.0.*", "1.1.*"]
+
+    defaults:
+      run:
+        shell: bash -el {0}
+
+    steps:
+      - name: Check out repository
+        uses: actions/checkout@v7
+
+      - name: Install FreeCAD ${{ matrix.freecad }}
+        uses: mamba-org/setup-micromamba@v3
+        with:
+          environment-name: freecad-ci
+          create-args: freecad=${{ matrix.freecad }}
+
+      - name: Install virtual display
+        run: sudo apt-get update && sudo apt-get install --yes xvfb
+
+      - name: Install addon
+        run: |
+          mkdir -p "$HOME/.local/share/FreeCAD/Mod"
+          ln -s "$GITHUB_WORKSPACE" "$HOME/.local/share/FreeCAD/Mod/FusedFilamentDesign"
+
+      - name: Run FreeCAD tests
+        shell: micromamba-shell {0}
+        run: |
+          set -o pipefail
+          freecad_executable="$(command -v FreeCAD || command -v freecad)"
+          xvfb-run -a "$freecad_executable" -t ffDesign_Tests 2>&1 | tee freecad-tests.log
+          ! grep -q "Traceback (most recent call last)" freecad-tests.log

InitGui.py

@@ -59,3 +59,6 @@ class ffDesignWB:
 
 
 register_pd_toolbar()
+
+if "ffDesign_Tests" not in FreeCAD.__unit_test__:
+    FreeCAD.__unit_test__.append("ffDesign_Tests")

ffDesign_RibThreads.py

@@ -1,5 +1,6 @@
 import math
 import dataclasses
+import re
 
 from PySide import QtCore, QtGui
 
@@ -275,7 +276,17 @@ def rib_template_name(hole, global_template: bool):
 def find_rib_template(body, hole, global_template: bool):
     name = rib_template_name(hole, global_template)
     if global_template:
-        return body.Document.getObject(name)
+        template = body.Document.getObject(name)
+        if template is None:
+            sanitized_name = re.sub(r"[^A-Za-z0-9_]", "_", name)
+            template = body.Document.getObject(sanitized_name)
+        if template is not None:
+            return template
+
+        # New templates preserve the unsanitized thread name in their Label,
+        # which also provides a fallback if FreeCAD's sanitization changes.
+        templates = body.Document.getObjectsByLabel(name)
+        return templates[0] if templates else None
     else:
         return body.getObject(name)
 
@@ -292,6 +303,7 @@ def get_or_create_rib_template(body, hole, global_template: bool, rib_param: Rib
     name = rib_template_name(hole, global_template)
     if global_template:
         template = body.Document.addObject("Sketcher::SketchObject", name)
+        template.Label = name
     else:
         template = body.newObject("Sketcher::SketchObject", name)
         template.Label = f"{hole.Label}_RibThread_Template"