feat: add workflow node registry phase 2

backend/tests/domains/test_workflow_node_registry.py

@@ -0,0 +1,47 @@
+import pytest
+
+from app.core.process_steps import StepName
+from app.domains.rendering.workflow_node_registry import (
+    get_node_definition,
+    list_node_definitions,
+)
+
+
+def test_node_registry_covers_all_step_names():
+    registered_steps = {definition.step for definition in list_node_definitions()}
+    expected_steps = {step.value for step in StepName}
+
+    assert registered_steps == expected_steps
+
+
+def test_turntable_node_definition_exposes_expected_schema():
+    definition = get_node_definition(StepName.BLENDER_TURNTABLE)
+
+    assert definition is not None
+    assert definition.node_type == "renderFramesNode"
+    assert definition.defaults["fps"] == 24
+    assert definition.defaults["duration_s"] == 5
+    assert {field.key for field in definition.fields} >= {
+        "render_engine",
+        "samples",
+        "width",
+        "height",
+        "fps",
+        "duration_s",
+        "rotation_z",
+    }
+
+
+@pytest.mark.asyncio
+async def test_node_definitions_endpoint_returns_registry(client, auth_headers):
+    response = await client.get("/api/workflows/node-definitions", headers=auth_headers)
+
+    assert response.status_code == 200
+    body = response.json()
+    assert len(body["definitions"]) == len(StepName)
+
+    blender_still = next(
+        definition for definition in body["definitions"] if definition["step"] == StepName.BLENDER_STILL.value
+    )
+    assert blender_still["node_type"] == "renderNode"
+    assert blender_still["defaults"]["render_engine"] == "cycles"