feat: query all process nodes for business_object

stateflow/tests/test_services.py

@@ -288,3 +288,33 @@ class StateFlowServicesTestCase(TestCase):
         self.state3.parameters.add(required_param)
         params = services.get_state_parameters(self.state3, required_only=True)
         self.assertEqual(len(params), 1)
+    
+    def test_get_process_nodes(self):
+        """测试获取业务对象所属流程的所有状态节点"""
+        # 获取流程节点
+        nodes = services.get_process_nodes(self.business_object)
+        
+        # 验证节点数量
+        self.assertEqual(len(nodes), 3)
+        
+        # 验证节点顺序和内容
+        self.assertEqual(nodes[0]['state_id'], self.state1.id)
+        self.assertEqual(nodes[0]['state_name'], self.state1.name)
+        self.assertEqual(nodes[0]['order'], 0)
+        
+        self.assertEqual(nodes[1]['state_id'], self.state2.id)
+        self.assertEqual(nodes[1]['state_name'], self.state2.name)
+        self.assertEqual(nodes[1]['order'], 1)
+        
+        self.assertEqual(nodes[2]['state_id'], self.state3.id)
+        self.assertEqual(nodes[2]['state_name'], self.state3.name)
+        self.assertEqual(nodes[2]['order'], 2)
+        
+        # 验证每个节点都有必要的字段
+        for node in nodes:
+            self.assertIn('id', node)
+            self.assertIn('state', node)
+            self.assertIn('state_id', node)
+            self.assertIn('state_name', node)
+            self.assertIn('order', node)
+            self.assertIsInstance(node['state'], models.State)