Add 'Stringify JSON' keyword

src/HttpLibrary/__init__.py

@@ -495,14 +495,33 @@ def should_be_valid_json(self, json_string):
 
     def parse_json(self, json_string):
         """
-        Parses the JSON document `json_string` and returns a Python datastructure.
+        Parses the JSON document `json_string` and returns a data structure.
 
         Example:
         | ${result}=       | Parse Json  | [1, 2, 3] |
         | Length Should Be | ${result}   | 3         |
+
+        `json_string` is the string containg JSON that will be parsed
         """
         return load_json(json_string)
 
+    def stringify_json(self, data):
+        """
+        Converts the data structure to a string containing its JSON string representation
+
+        Example:
+        | ${data} =                   | Create List    |  1  2  3          |
+        | ${json_string}=             | Stringify JSON |  ${data}          |
+        | Should Be Equal As Strings  | ${json_string} |  ["1", "2", "3"]  |
+
+        `data` is the data structure to convert to json
+        """
+
+        try:
+            return json.dumps(data)
+        except ValueError, e:
+            raise ValueError("Could not stringify '%r' to JSON: %s" % (data, e))
+
     @_with_json
     def get_json_value(self, json_string, json_pointer):
         """

tests/json.txt

@@ -1,6 +1,7 @@
 *** Setting ***
 
 Library  HttpLibrary.HTTP
+Library  Collections
 
 *** Test Cases ***
 
@@ -96,3 +97,15 @@ Json Value Should Be Fail Invalid Pointer
     ...  JsonPointerException: 'baz' not found in {u'foo': {u'bar': [4, 5, 6]}}
     ...  Json Value Should Equal  ${doc}  /baz  [7,8,9]
 
+Stringify Documentation Example
+    ${data} =                   Create List      1  2  3
+    ${json_string}=             Stringify JSON   ${data}
+    Should Be Equal As Strings  ${json_string}   ["1", "2", "3"]
+
+Stringify Complex Object
+    ${names} =       Create List         First Name     Family Name    Email
+    ${data} =        Create Dictionary   names  ${names}   a  1   b  12
+    ${json_string}=  Stringify JSON      ${data}
+
+    Should Be Equal As Strings  ${json_string}   {"a": "1", "b": "12", "names": ["First Name", "Family Name", "Email"]}
+