Started moving update tests into lib.

src/action/update.rs

@@ -1,4 +1,4 @@
-use super::{Query, RequestData};
+use super::{CalcValue, Query, RequestData};
 use crate::{message::MessageAction, name::NameType};
 
 #[derive(Clone, Debug)]
@@ -28,6 +28,14 @@ impl Update {
         &mut self.query
     }
 
+    pub fn add_field<NT, CV>(&mut self, name: NT, field: CV)
+    where
+        CV: Into<CalcValue>,
+        NT: Into<NameType>,
+    {
+        self.values.add_field(name, field);
+    }
+
     pub fn get_values(&self) -> &RequestData {
         &self.values
     }