introduce PropertyValidator (wrapper)

test/property/test_property_validator.py

@@ -0,0 +1,37 @@
+from unittest import TestCase
+from owrx.property import PropertyLayer, PropertyValidator, PropertyValidationError
+from owrx.property.validators import NumberValidator, StringValidator
+
+
+class PropertyValidatorTest(TestCase):
+    def testPassesUnvalidated(self):
+        pm = PropertyLayer()
+        pv = PropertyValidator(pm)
+        pv["testkey"] = "testvalue"
+        self.assertEqual(pv["testkey"], "testvalue")
+        self.assertEqual(pm["testkey"], "testvalue")
+
+    def testPassesValidValue(self):
+        pv = PropertyValidator(PropertyLayer(), {"testkey": NumberValidator()})
+        pv["testkey"] = 42
+        self.assertEqual(pv["testkey"], 42)
+
+    def testThrowsErrorOnInvalidValue(self):
+        pv = PropertyValidator(PropertyLayer(), {"testkey": NumberValidator()})
+        with self.assertRaises(PropertyValidationError):
+            pv["testkey"] = "text"
+
+    def testSetValidator(self):
+        pv = PropertyValidator(PropertyLayer())
+        pv.setValidator("testkey", NumberValidator())
+        with self.assertRaises(PropertyValidationError):
+            pv["testkey"] = "text"
+
+    def testUpdateValidator(self):
+        pv = PropertyValidator(PropertyLayer(), {"testkey": StringValidator()})
+        # this should pass
+        pv["testkey"] = "text"
+        pv.setValidator("testkey", NumberValidator())
+        # this should raise
+        with self.assertRaises(PropertyValidationError):
+            pv["testkey"] = "text"