bind_extractors: Bind named extractors to value within the context.

ate/context.py

@@ -8,6 +8,7 @@ class Context(object):
     def __init__(self):
         self.functions = dict()
         self.variables = dict()  # Maps variable name to value
+        self.extractors = dict()
 
     def import_requires(self, modules):
         """ import required modules dynamicly
@@ -44,6 +45,20 @@ class Context(object):
             for var_name, var_value in variable_bind_map.items():
                 self.variables[var_name] = self.get_eval_value(var_value)
 
+    def bind_extractors(self, extract_binds):
+        """ Bind named extractors to value within the context.
+            value => parsed from requests.Response object
+            key => extractor name, can be used as variable in next testcases
+        @param (dict) extract_binds
+            {
+                "resp_status_code": "status_code",
+                "resp_headers": "headers",
+                "resp_headers_content_type": "headers.content-type",
+                "resp_content": "content"
+            }
+        """
+        self.extractors.update(extract_binds)
+
     def get_eval_value(self, data):
         """ evaluate data recursively, each variable in data will be evaluated.
             variables marker: ${variable}.