test: add test for state override json (#3586)

crates/rpc/rpc-types/src/eth/state.rs

@@ -30,3 +30,22 @@ pub struct AccountOverride {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub state_diff: Option<HashMap<H256, H256>>,
 }
+
+#[cfg(test)]
+mod tests {
+    use super::*;
+
+    #[test]
+    fn test_state_override() {
+        let s = r#"{
+            "0x0000000000000000000000000000000000000124": {
+                "code": "0x6080604052348015600e575f80fd5b50600436106026575f3560e01c80632096525514602a575b5f80fd5b60306044565b604051901515815260200160405180910390f35b5f604e600242605e565b5f0360595750600190565b505f90565b5f82607757634e487b7160e01b5f52601260045260245ffd5b50069056fea2646970667358221220287f77a4262e88659e3fb402138d2ee6a7ff9ba86bae487a95aa28156367d09c64736f6c63430008140033"
+            }
+        }"#;
+        let state_override: StateOverride = serde_json::from_str(s).unwrap();
+        let acc = state_override
+            .get(&"0x0000000000000000000000000000000000000124".parse().unwrap())
+            .unwrap();
+        assert!(acc.code.is_some());
+    }
+}