Add test method to property_utils

Author: Maxcode123

src/property_utils/tests/properties/property_utils.py

@@ -45,6 +45,12 @@ def assert_result(self, result_str):
         self.assertResultIsNot(self.prop())
         self.assertSequenceEqual(str(self.cachedResult()), result_str, str)
 
+    def assert_result_almost(self, result_str):
+        self.assertResultIsNot(self.prop())
+        result = self.cachedResult()
+        result.value = round(result.value, 2)
+        self.assertSequenceEqual(str(result), result_str, str)
+
     def _assert_error(self, error: PropertyUtilsException, expected_regex):
         if expected_regex is None:
             self.assertResultRaises(error)