text(tx-pool): add unit tests for tx pool state (#12690)

crates/transaction-pool/src/pool/state.rs

@@ -46,8 +46,6 @@ bitflags::bitflags! {
     }
 }
 
-// === impl TxState ===
-
 impl TxState {
     /// The state of a transaction is considered `pending`, if the transaction has:
     ///   - _No_ parked ancestors
@@ -89,8 +87,6 @@ pub enum SubPool {
     Pending,
 }
 
-// === impl SubPool ===
-
 impl SubPool {
     /// Whether this transaction is to be moved to the pending sub-pool.
     #[inline]
@@ -126,16 +122,15 @@ impl SubPool {
 impl From<TxState> for SubPool {
     fn from(value: TxState) -> Self {
         if value.is_pending() {
-            return Self::Pending
-        }
-        if value.is_blob() {
+            Self::Pending
+        } else if value.is_blob() {
             // all _non-pending_ blob transactions are in the blob sub-pool
-            return Self::Blob
+            Self::Blob
+        } else if value.bits() < TxState::BASE_FEE_POOL_BITS.bits() {
+            Self::Queued
+        } else {
+            Self::BaseFee
         }
-        if value.bits() < TxState::BASE_FEE_POOL_BITS.bits() {
-            return Self::Queued
-        }
-        Self::BaseFee
     }
 }
 
@@ -204,4 +199,61 @@ mod tests {
         assert!(state.is_blob());
         assert!(!state.is_pending());
     }
+
+    #[test]
+    fn test_tx_state_no_nonce_gap() {
+        let mut state = TxState::default();
+        state |= TxState::NO_NONCE_GAPS;
+        assert!(!state.has_nonce_gap());
+    }
+
+    #[test]
+    fn test_tx_state_with_nonce_gap() {
+        let state = TxState::default();
+        assert!(state.has_nonce_gap());
+    }
+
+    #[test]
+    fn test_tx_state_enough_balance() {
+        let mut state = TxState::default();
+        state.insert(TxState::ENOUGH_BALANCE);
+        assert!(state.contains(TxState::ENOUGH_BALANCE));
+    }
+
+    #[test]
+    fn test_tx_state_not_too_much_gas() {
+        let mut state = TxState::default();
+        state.insert(TxState::NOT_TOO_MUCH_GAS);
+        assert!(state.contains(TxState::NOT_TOO_MUCH_GAS));
+    }
+
+    #[test]
+    fn test_tx_state_enough_fee_cap_block() {
+        let mut state = TxState::default();
+        state.insert(TxState::ENOUGH_FEE_CAP_BLOCK);
+        assert!(state.contains(TxState::ENOUGH_FEE_CAP_BLOCK));
+    }
+
+    #[test]
+    fn test_tx_base_fee() {
+        let state = TxState::BASE_FEE_POOL_BITS;
+        assert_eq!(SubPool::BaseFee, state.into());
+    }
+
+    #[test]
+    fn test_blob_transaction_only() {
+        let state = TxState::BLOB_TRANSACTION;
+        assert_eq!(SubPool::Blob, state.into());
+        assert!(state.is_blob());
+        assert!(!state.is_pending());
+    }
+
+    #[test]
+    fn test_blob_transaction_with_base_fee_bits() {
+        let mut state = TxState::BASE_FEE_POOL_BITS;
+        state.insert(TxState::BLOB_TRANSACTION);
+        assert_eq!(SubPool::Blob, state.into());
+        assert!(state.is_blob());
+        assert!(!state.is_pending());
+    }
 }