add lookup iexact (#39)

Author: GlooMyPan

pgcrypto/fields.py

@@ -320,6 +320,7 @@ class EncryptedInLookup(FieldGetDbPrepValueIterableMixin, EncryptedLookup):
 
 for lookup_name in (
     "exact",
+    "iexact",
     "gt",
     "gte",
     "lt",

testapp/tests.py

@@ -262,6 +262,14 @@ def test_concat_decrypt(self):
         ).get(ssn="999-05-6728")
         self.assertEqual(employee.value, "999-05-6728 - 42")
 
+    def test_exact(self):
+        employee = Employee.objects.filter(email__exact="[email protected]").get()
+        self.assertEqual(employee.email, "[email protected]")
+
+    def test_iexact(self):
+        employee = Employee.objects.filter(email__iexact="[email protected]").get()
+        self.assertEqual(employee.email, "[email protected]")
+
     def test_contains(self):
         employee = Employee.objects.filter(email__contains="sal").get()
         self.assertEqual(employee.email, "[email protected]")