chore(common): add serde skip for compute_units_per_second in EvmArgs (foundry-rs#11662)

* chore(common): add serde skip for compute_units_per_second in EvmArgs

* add tests

Author: Forostovec

crates/common/src/evm.rs

@@ -113,6 +113,7 @@ pub struct EvmArgs {
     ///
     /// See also --fork-url and <https://docs.alchemy.com/reference/compute-units#what-are-cups-compute-units-per-second>
     #[arg(long, alias = "cups", value_name = "CUPS", help_heading = "Fork config")]
+    #[serde(skip_serializing_if = "Option::is_none")]
     pub compute_units_per_second: Option<u64>,
 
     /// Disables rate limiting for this node's provider.
@@ -298,6 +299,26 @@ mod tests {
     use super::*;
     use foundry_config::NamedChain;
 
+    #[test]
+    fn compute_units_per_second_skips_when_none() {
+        let args = EvmArgs::default();
+        let data = args.data().expect("provider data");
+        let dict = data.get(&Config::selected_profile()).expect("profile dict");
+        assert!(
+            !dict.contains_key("compute_units_per_second"),
+            "compute_units_per_second should be skipped when None"
+        );
+    }
+
+    #[test]
+    fn compute_units_per_second_present_when_some() {
+        let args = EvmArgs { compute_units_per_second: Some(1000), ..Default::default() };
+        let data = args.data().expect("provider data");
+        let dict = data.get(&Config::selected_profile()).expect("profile dict");
+        let val = dict.get("compute_units_per_second").expect("cups present");
+        assert_eq!(val, &Value::from(1000u64));
+    }
+
     #[test]
     fn can_parse_chain_id() {
         let args = EvmArgs {