Update test to include Slow fee priority

The test for map_transaction_rate_rates now checks for three fee priorities: Slow, Normal, and Fast, with corresponding gas prices. This reflects an update to the function's output to include the Slow priority.

Author: gemcoder21

crates/gem_sui/src/provider/preload_mapper.rs

@@ -213,10 +213,12 @@ mod tests {
     fn test_map_transaction_rate_rates() {
         let rates = map_transaction_rate_rates(BigInt::from(497));
 
-        assert_eq!(rates.len(), 2);
-        assert_eq!(rates[0].priority, FeePriority::Normal);
-        assert_eq!(rates[0].gas_price_type.gas_price(), BigInt::from(546));
-        assert_eq!(rates[1].priority, FeePriority::Fast);
-        assert_eq!(rates[1].gas_price_type.gas_price(), BigInt::from(994));
+        assert_eq!(rates.len(), 3);
+        assert_eq!(rates[0].priority, FeePriority::Slow);
+        assert_eq!(rates[0].gas_price_type.gas_price(), BigInt::from(497));
+        assert_eq!(rates[1].priority, FeePriority::Normal);
+        assert_eq!(rates[1].gas_price_type.gas_price(), BigInt::from(546));
+        assert_eq!(rates[2].priority, FeePriority::Fast);
+        assert_eq!(rates[2].gas_price_type.gas_price(), BigInt::from(994));
     }
 }