v0.1.0-dev: initial public extraction + new abstractions

tests/test_invoice.py

@@ -0,0 +1,49 @@
+"""Invoice dataclass + state machine tests."""
+
+from __future__ import annotations
+
+from datetime import datetime, timedelta, timezone
+
+from cardano_checkout.invoice import Invoice, InvoiceStatus
+
+
+def _make() -> Invoice:
+    return Invoice(
+        id="inv_001",
+        merchant_id="example-studio",
+        derivation_index=0,
+        receive_address="addr1...",
+        expected_lovelace=5_000_000,   # 5 ADA
+        usd_amount=2.50,
+    )
+
+
+def test_defaults_are_pending_and_non_terminal() -> None:
+    inv = _make()
+    assert inv.status == InvoiceStatus.PENDING
+    assert inv.is_terminal is False
+    assert inv.ada_amount == 5.0
+
+
+def test_terminal_states() -> None:
+    for s in (InvoiceStatus.CONFIRMED, InvoiceStatus.EXPIRED, InvoiceStatus.CANCELLED):
+        inv = _make()
+        inv.status = s
+        assert inv.is_terminal is True
+
+
+def test_is_expired_honors_expires_at() -> None:
+    past = datetime.now(timezone.utc) - timedelta(minutes=5)
+    future = datetime.now(timezone.utc) + timedelta(minutes=5)
+
+    inv = _make()
+    inv.expires_at = past
+    assert inv.is_expired() is True
+
+    inv.expires_at = future
+    assert inv.is_expired() is False
+
+    # Confirmed invoices are never "expired" regardless of timestamp
+    inv.expires_at = past
+    inv.status = InvoiceStatus.CONFIRMED
+    assert inv.is_expired() is False