start implementing a validation layer, refs #215

test/property/validators/test_validator.py

@@ -0,0 +1,16 @@
+from unittest import TestCase
+from owrx.property.validators import Validator, NumberValidator, LambdaValidator
+
+
+class ValidatorTest(TestCase):
+
+    def testReturnsValidator(self):
+        validator = NumberValidator()
+        self.assertIs(validator, Validator.of(validator))
+
+    def testTransformsLambda(self):
+        def my_callable(v):
+            return True
+        validator = Validator.of(my_callable)
+        self.assertIsInstance(validator, LambdaValidator)
+        self.assertTrue(validator.isValid("test"))