Fix bad usage of the strip function (#77)

Author: akariv

jsontableschema/VERSION

@@ -1 +1 @@
-0.6.4
+0.6.5

jsontableschema/types/base.py

@@ -67,9 +67,9 @@ def __init__(self, field=None):
         # Set parsed format (fmt feature)
         self.__format_main = self.__format
         self.__format_fmt = None
-        if self.__format.startswith('fmt'):
+        if self.__format.startswith('fmt:'):
             self.__format_main = 'fmt'
-            self.__format_fmt = self.__format.strip('fmt:')
+            self.__format_fmt = self.__format[4:]
 
     @property
     def field(self):

tests/test_types.py

@@ -446,6 +446,14 @@ def test_date_type_fmt(self):
 
         self.assertEquals(_type.cast(value), date(2014, 6, 10))
 
+    def test_date_type_fmt_stripping_bug(self):
+
+        value = '2014-06'
+        self.field['format'] = 'fmt:%Y-%m'
+        _type = types.DateType(self.field)
+
+        self.assertEquals(_type.cast(value), date(2014, 6, 1))
+
     def test_non_iso_date_fails_for_default(self):
         value = '01-01-2019'
         _type = types.DateType(self.field)