chore: add basic unit test for deprecated aliases

Signed-off-by: exploreriii <[email protected]>

Author: exploreriii

tests/unit/test_deprecated.py

@@ -0,0 +1,67 @@
+import pytest
+from unittest.mock import MagicMock
+
+from hiero_sdk_python.tokens.nft_id import NftId
+from hiero_sdk_python.tokens.token_info import TokenInfo
+from hiero_sdk_python.transaction.transaction_receipt import TransactionReceipt
+from hiero_sdk_python.tokens.token_id import TokenId
+
+def test_nftid_deprecated_alias_access():
+    token = TokenId.from_string("0.0.123")
+    nft = NftId(token_id=token, serial_number=7)
+
+    # serialNumber -> serial_number
+    with pytest.warns(FutureWarning) as record_serial:
+        got = nft.serialNumber
+    assert got == 7
+    assert "serialNumber" in str(record_serial[0].message)
+
+    # tokenId -> token_id
+    with pytest.warns(FutureWarning) as record_tokenid:
+        got = nft.tokenId
+    assert got is token
+    assert "tokenId" in str(record_tokenid[0].message)
+
+
+def test_tokeninfo_deprecated_alias_access():
+    token = TokenId.from_string("0.0.456")
+    info = TokenInfo(token_id=token, total_supply=1000, is_deleted=True)
+
+    # totalSupply -> total_supply
+    with pytest.warns(FutureWarning) as record_supply:
+        got = info.totalSupply
+    assert got == 1000
+    assert "totalSupply" in str(record_supply[0].message)
+
+    # isDeleted -> is_deleted
+    with pytest.warns(FutureWarning) as record_delete:
+        got = info.isDeleted
+    assert got is True
+    assert "isDeleted" in str(record_delete[0].message)
+
+
+def test_transactionreceipt_deprecated_alias_access():
+    proto = MagicMock()
+    proto.status = "OK"
+    proto.HasField.return_value = False
+    proto.serialNumbers = [1, 2, 3]
+
+    tr = TransactionReceipt(receipt_proto=proto)
+
+    # tokenId -> token_id
+    with pytest.warns(FutureWarning) as record_token:
+        got = tr.tokenId
+    assert got is None
+    assert "tokenId" in str(record_token[0].message)
+
+    # topicId -> topic_id
+    with pytest.warns(FutureWarning) as record_topic:
+        got = tr.topicId
+    assert got is None
+    assert "topicId" in str(record_topic[0].message)
+
+    # accountId -> account_id
+    with pytest.warns(FutureWarning) as record_acc:
+        acc = tr.accountId
+    assert acc is None
+    assert "accountId" in str(record_acc[0].message)