test: internalize external documents

doc/changelog.d/2109.test.md

@@ -0,0 +1 @@
+Internalize external documents

tests/integration/test_design_import.py

@@ -535,3 +535,31 @@ def test_design_insert_id_bug(modeler: Modeler):
 
     assert len(design1.components[0].bodies) == 1
     assert len(design1.components[1].bodies) == 1
+
+
+def test_import_scdocx_with_external_docs(modeler: Modeler):
+    """Test importing an SCDOCX file with external documents and verify it is internalized."""
+    # Create a new design
+    design = modeler.create_design("Insert External Document")
+
+    # Define the path to the external SCDOCX file
+    path_to_external_doc = Path(FILES_DIR, "external_file_scdocx", "Design1.scdocx")
+
+    # Import the external SCDOCX file
+    design.insert_file(file_location=path_to_external_doc)
+
+    # Verify that the design structure is internalized
+    # Check the number of bodies in the design
+    assert len(design.bodies) == 0
+
+    # Check the number of components in the design
+    assert len(design.components) == 1
+
+    # Check the number of bodies in the first component
+    assert len(design.components[0].bodies) == 1
+
+    # Check the number of subcomponents in the first component
+    assert len(design.components[0].components) == 5
+
+    for component in design.components[0].components:
+        assert len(component.bodies) == 1