eips: add missing unit test for MIN_PROTOCOL_BASE_FEE

crates/eips/src/eip1559/constants.rs

@@ -51,3 +51,13 @@ pub(crate) const OP_MAINNET_EIP1559_DEFAULT_ELASTICITY_MULTIPLIER: u128 = 6;
 /// Base fee max change denominator for Base Sepolia as defined in the Optimism
 /// [transaction costs](https://community.optimism.io/docs/developers/build/differences/#transaction-costs) doc.
 pub(crate) const BASE_SEPOLIA_EIP1559_DEFAULT_ELASTICITY_MULTIPLIER: u128 = 10;
+
+#[cfg(test)]
+mod tests {
+    use super::*;
+
+    #[test]
+    fn min_protocol_sanity() {
+        assert_eq!(MIN_PROTOCOL_BASE_FEE_U256.to::<u64>(), MIN_PROTOCOL_BASE_FEE);
+    }
+}