feat(client): add test for offset

Author: refcell

bin/client/src/precompiles/bls12.rs

@@ -96,6 +96,16 @@ mod tests {
     use super::*;
     use alloc::vec;
 
+    #[test]
+    fn test_fpvm_bls12_offset() {
+        let input = Bytes::from(vec![0u8; INPUT_LENGTH + 1]);
+        let gas_limit = PAIRING_OFFSET_BASE;
+        let err = PrecompileError::Other(
+            "Pairing input length should be multiple of 384, was 385".to_string(),
+        );
+        assert_eq!(fpvm_bls12_pairing(&input, gas_limit), Err(err.into()));
+    }
+
     #[test]
     fn test_fpvm_bls12_out_of_gas() {
         let input = Bytes::from(vec![0u8; INPUT_LENGTH * 2]);