test: added coverage for tokenAirdrop to a smart contract

Signed-off-by: Logan Nguyen <logan.nguyen@swirldslabs.com>

test/system-contracts/hedera-token-service/token-airdrop/tokenAirdropContract.js

@@ -80,6 +80,25 @@ describe.only('HRC904Contract Test Suite', function () {
     expect(receipt.status).to.eq(1);
   });
 
+  it('should revert for tokenAirdrop to a smart contract', async function () {
+    try {
+      const tx = await airdropContract.tokenAirdrop(
+        tokenAddress,
+        signers[0].address,
+        tokenCreateContract.target,
+        1,
+        {
+          gasLimit: 2_000_000,
+          value: 100_000,
+        }
+      );
+      await tx.wait();
+      expect.fail('Should revert');
+    } catch (error) {
+      expect(error.code).to.eq(Constants.CALL_EXCEPTION);
+    }
+  });
+
   it('should be able to airdrop any token in its balance based on token address', async function () {
     const tx = await airdropContract.tokenAirdrop(
       tokenAddress,