Implement native BPMN workflows and guided modes

tests/test_node_library.py

@@ -2,7 +2,10 @@ from __future__ import annotations
 
 import unittest
 
-from govoplan_workflow.backend.node_library import WORKFLOW_GRAPH_LIBRARY
+from govoplan_workflow.backend.node_library import (
+    BPMN_NODE_TYPES,
+    WORKFLOW_GRAPH_LIBRARY,
+)
 from govoplan_workflow.backend.schemas import WorkflowEdge, WorkflowGraph, WorkflowNode
 from govoplan_workflow.backend.validation import validate_workflow_graph
 
@@ -91,6 +94,52 @@ class WorkflowNodeLibraryTests(unittest.TestCase):
     def test_library_has_domain_specific_cycle_policy(self) -> None:
         self.assertTrue(WORKFLOW_GRAPH_LIBRARY.constraints.allow_cycles)
         self.assertEqual(WORKFLOW_GRAPH_LIBRARY.id, "workflow")
+        self.assertEqual("1.0.0", WORKFLOW_GRAPH_LIBRARY.version)
+        activity = WORKFLOW_GRAPH_LIBRARY.node_type("workflow.activity")
+        self.assertIn(
+            "view_surface_ids",
+            {field.id for field in activity.config_fields},
+        )
+
+    def test_native_palette_uses_standard_bpmn_vocabulary(self) -> None:
+        node_types = {item.type for item in BPMN_NODE_TYPES}
+
+        self.assertIn("bpmn.startEvent", node_types)
+        self.assertIn("bpmn.userTask", node_types)
+        self.assertIn("bpmn.exclusiveGateway", node_types)
+        self.assertIn("bpmn.participant", node_types)
+        self.assertIn("bpmn.textAnnotation", node_types)
+        self.assertTrue(all(item.startswith("bpmn.") for item in node_types))
+
+    def test_bpmn_rejects_multiple_default_flows(self) -> None:
+        graph = WorkflowGraph(
+            nodes=[
+                WorkflowNode(id="start", type="bpmn.startEvent"),
+                WorkflowNode(id="choice", type="bpmn.exclusiveGateway"),
+                WorkflowNode(id="end-a", type="bpmn.endEvent"),
+                WorkflowNode(id="end-b", type="bpmn.endEvent"),
+            ],
+            edges=[
+                WorkflowEdge(id="to-choice", source="start", target="choice"),
+                WorkflowEdge(
+                    id="default-a",
+                    source="choice",
+                    target="end-a",
+                    config={"default": True},
+                ),
+                WorkflowEdge(
+                    id="default-b",
+                    source="choice",
+                    target="end-b",
+                    config={"default": True},
+                ),
+            ],
+        )
+
+        self.assertIn(
+            "bpmn.multiple_default_flows",
+            {item.code for item in validate_workflow_graph(graph)},
+        )
 
 
 if __name__ == "__main__":