use ir_tree_to_data to avoid going through full flow

Author: tybug

hypothesis-python/src/hypothesis/internal/conjecture/engine.py

@@ -239,6 +239,11 @@ def __stoppable_test_function(self, data):
                     # correct engine.
                     raise
 
+    def ir_tree_to_data(self, ir_tree_nodes):
+        data = ConjectureData.for_ir_tree(ir_tree_nodes)
+        self.__stoppable_test_function(data)
+        return data
+
     def test_function(self, data):
         if self.__pending_call_explanation is not None:
             self.debug(self.__pending_call_explanation)
@@ -316,8 +321,7 @@ def test_function(self, data):
 
                 # drive the ir tree through the test function to convert it
                 # to a buffer
-                data = ConjectureData.for_ir_tree(data.examples.ir_tree_nodes)
-                self.__stoppable_test_function(data)
+                data = self.ir_tree_to_data(data.examples.ir_tree_nodes)
                 self.__data_cache[data.buffer] = data.as_result()
 
             key = data.interesting_origin

hypothesis-python/src/hypothesis/internal/conjecture/shrinker.py

@@ -376,8 +376,7 @@ def calls(self):
         return self.engine.call_count
 
     def consider_new_tree(self, tree):
-        data = ConjectureData.for_ir_tree(tree)
-        self.engine.test_function(data)
+        data = self.engine.ir_tree_to_data(tree)
 
         return self.consider_new_buffer(data.buffer)