Added jsonstring tests

.travis.yml

@@ -22,7 +22,7 @@ before_install:
 install:
 - |
   if [ "$TEST_TYPE" = build ]; then
-    pip install pytest pytest-cov pytest-benchmark coveralls six
+    pip install pytest pytest-cov pytest-benchmark coveralls six pytz iso8601
     pip install -e .
     python setup.py develop
   elif [ "$TEST_TYPE" = lint ]; then

graphene/types/tests/test_json.py

@@ -0,0 +1,39 @@
+import json
+
+from ..json import JSONString
+from ..objecttype import ObjectType
+from ..schema import Schema
+
+
+class Query(ObjectType):
+    json = JSONString(input=JSONString())
+
+    def resolve_json(self, args, context, info):
+        input = args.get('input')
+        return input
+
+schema = Schema(query=Query)
+
+
+def test_jsonstring_query():
+    json_value = '{"key": "value"}'
+
+    json_value_quoted = json_value.replace('"', '\\"')
+    result = schema.execute('''{ json(input: "%s") }'''%json_value_quoted)
+    assert not result.errors
+    assert result.data == {
+        'json': json_value
+    }
+
+
+def test_jsonstring_query_variable():
+    json_value = '{"key": "value"}'
+
+    result = schema.execute(
+        '''query Test($json: JSONString){ json(input: $json) }''',
+        variable_values={'json': json_value}
+    )
+    assert not result.errors
+    assert result.data == {
+        'json': json_value
+    }