added URLField, DecimalField, tests.

tests/fields.py

@@ -1,5 +1,6 @@
 import unittest
 import datetime
+from decimal import Decimal
 
 from mongoengine import *
 from mongoengine.connection import _get_db
@@ -78,6 +79,23 @@ class FieldTest(unittest.TestCase):
 
         person.name = 'Shorter name'
         person.validate()
+        
+    def test_url_validation(self):
+        """Ensure that invalid URLs cannot be assigned to URL fields.
+        """
+        class Person(Document):
+            name = StringField()
+            personal_blog = URLField()
+            
+        person = Person()
+        person.name = "Guido van Rossum"
+        person.personal_blog = "pep8 or bust!"
+
+        self.assertRaises(ValidationError, person.validate)
+        
+        # swap in a real URL
+        person.personal_blog = "http://neopythonic.blogspot.com/"
+        person.validate()
 
     def test_int_validation(self):
         """Ensure that invalid values cannot be assigned to int fields.
@@ -112,6 +130,24 @@ class FieldTest(unittest.TestCase):
         self.assertRaises(ValidationError, person.validate)
         person.height = 4.0
         self.assertRaises(ValidationError, person.validate)
+        
+    def test_decimal_validation(self):
+        """Ensure that invalid values cannot be assigned to decimal fields.
+        """
+        class AlbumReview(Document):
+            score = DecimalField()
+            
+        review = AlbumReview()
+        review.score = "8.7"
+        review.validate()
+        review.score = Decimal("10.0")
+        review.validate()
+        # implicit conversion from float to string
+        review.score = 3.14
+        review.validate()
+        
+        review.score = "it stinks!"
+        self.assertRaises(ValidationError, review.validate)
 
     def test_boolean_validation(self):
         """Ensure that invalid values cannot be assigned to boolean fields.