add hook feature:

1, setup_hook: call function before request
2, teardown_hook: call function after request

tests/test_client.py

@@ -1,6 +1,8 @@
-from httprunner.client import HttpSession, prepare_kwargs
+from httprunner.built_in import setup_hook_prepare_kwargs
+from httprunner.client import HttpSession
 from tests.base import ApiServerUnittest
 
+
 class TestHttpClient(ApiServerUnittest):
     def setUp(self):
         super(TestHttpClient, self).setUp()
@@ -46,7 +48,7 @@ class TestHttpClient(ApiServerUnittest):
                 "b": 2
             }
         }
-        prepare_kwargs("POST", kwargs)
+        setup_hook_prepare_kwargs("POST", "/path", kwargs)
         self.assertIn('"a": 1', kwargs["data"])
         self.assertIn('"b": 2', kwargs["data"])
 
@@ -60,5 +62,5 @@ class TestHttpClient(ApiServerUnittest):
                 "b": 2
             }
         }
-        prepare_kwargs("POST", kwargs)
+        setup_hook_prepare_kwargs("POST", "/path", kwargs)
         self.assertIsInstance(kwargs["data"], bytes)

tests/test_context.py

@@ -230,7 +230,7 @@ class VariableBindsUnittest(ApiServerUnittest):
 
     def test_exec_content_functions(self):
         test_runner = runner.Runner()
-        content = "${sleep(1)}"
+        content = "${teardown_hook_sleep_1_secs(1)}"
         start_time = time.time()
         test_runner.context.eval_content(content)
         end_time = time.time()

tests/test_runner.py

@@ -65,7 +65,7 @@ class TestRunner(ApiServerUnittest):
                 {"check": "status_code", "expect": 205},
                 {"check": "content.token", "comparator": "len_eq", "expect": 19}
             ],
-            "teardown": ["${sleep(2)}"]
+            "teardown_hooks": ["teardown_hook_sleep_1_secs"]
         }
 
         with self.assertRaises(exception.ValidationError):