this got @gmail.com banned on kilo.ai

tests/test_usage.py

@@ -0,0 +1,17 @@
+import pytest
+
+from usage import BalanceResult
+
+
+def test_balance_result_dataclass():
+    result = BalanceResult(balance=10.5, is_invalid=False, error=None)
+    assert result.balance == 10.5
+    assert result.is_invalid is False
+    assert result.error is None
+
+
+def test_balance_result_invalid():
+    result = BalanceResult(balance=None, is_invalid=True, error="Invalid token")
+    assert result.balance is None
+    assert result.is_invalid is True
+    assert result.error == "Invalid token"