feat(mcp-alpaca): leverage_cap + paper resolver + environment_info

services/mcp-alpaca/tests/test_leverage_cap.py

@@ -0,0 +1,47 @@
+from __future__ import annotations
+
+import pytest
+from fastapi import HTTPException
+
+from mcp_alpaca.leverage_cap import enforce_leverage, get_max_leverage
+
+
+def test_get_max_leverage_returns_creds_value():
+    creds = {"max_leverage": 4}
+    assert get_max_leverage(creds) == 4
+
+
+def test_get_max_leverage_default_when_missing():
+    """Default 1 (cash) se il secret non ha max_leverage."""
+    assert get_max_leverage({}) == 1
+
+
+def test_enforce_leverage_pass_at_cap_one():
+    """Alpaca cash account: cap 1, leverage 1 OK."""
+    creds = {"max_leverage": 1}
+    enforce_leverage(1, creds=creds, exchange="alpaca")  # no raise
+
+
+def test_enforce_leverage_reject_over_cap_one():
+    creds = {"max_leverage": 1}
+    with pytest.raises(HTTPException) as exc:
+        enforce_leverage(2, creds=creds, exchange="alpaca")
+    assert exc.value.status_code == 403
+    assert exc.value.detail["error"] == "LEVERAGE_CAP_EXCEEDED"
+    assert exc.value.detail["exchange"] == "alpaca"
+    assert exc.value.detail["requested"] == 2
+    assert exc.value.detail["max"] == 1
+
+
+def test_enforce_leverage_reject_when_below_one():
+    creds = {"max_leverage": 1}
+    with pytest.raises(HTTPException) as exc:
+        enforce_leverage(0, creds=creds, exchange="alpaca")
+    assert exc.value.status_code == 403
+
+
+def test_enforce_leverage_default_when_none():
+    """Se requested è None, applica il cap come default."""
+    creds = {"max_leverage": 1}
+    result = enforce_leverage(None, creds=creds, exchange="alpaca")
+    assert result == 1