docs(nav): 阅读路径导航 + 数字统一

src/py_params/test/test_param_callback.py

@@ -1,5 +1,4 @@
 """测试参数变化回调: 接受合法值 / 拒绝非法值 / 同步缓存。"""
-from rcl_interfaces.msg import ParameterValue, ParameterType
 from rclpy.parameter import Parameter
 
 from py_params.param_node import ParamsTalker
@@ -7,24 +6,12 @@ from py_params.param_node import ParamsTalker
 
 def _make_double_param(name: str, value: float) -> Parameter:
     """构造 DOUBLE 类型 Parameter(测试样板)。"""
-    return Parameter(
-        name=name,
-        value=ParameterValue(
-            type=ParameterType.PARAMETER_DOUBLE,
-            double_value=value,
-        ),
-    )
+    return Parameter(name, Parameter.Type.DOUBLE, value)
 
 
 def _make_string_param(name: str, value: str) -> Parameter:
     """构造 STRING 类型 Parameter(测试样板)。"""
-    return Parameter(
-        name=name,
-        value=ParameterValue(
-            type=ParameterType.PARAMETER_STRING,
-            string_value=value,
-        ),
-    )
+    return Parameter(name, Parameter.Type.STRING, value)
 
 
 def test_set_valid_rate(params_talker: ParamsTalker) -> None:
@@ -56,7 +43,6 @@ def test_set_prefix_syncs_cache(params_talker: ParamsTalker) -> None:
         [_make_string_param('message_prefix', 'HelloWorld:')],
     )
     assert results[0].successful is True
-    # 验证内部缓存
     assert params_talker._prefix == 'HelloWorld:'
 
 
@@ -80,4 +66,4 @@ def test_set_parameters_atomically_rollback(params_talker: ParamsTalker) -> None
     ]
     result = params_talker.set_parameters_atomically(new_params)
     assert result.successful is False
-    assert params_talker.get_parameter('message_prefix').value == 'Params:'
+    assert params_talker.get_parameter('message_prefix').value == 'Params:'