Add 'fiscal/' from commit '102ba84500dbd9655a0471288c3e278652593ca9'

git-subtree-dir: fiscal
git-subtree-mainline: d95165fc8f
git-subtree-split: 102ba84500

fiscal/central/tests/test_ai_budget_ledger.py

@@ -0,0 +1,16 @@
+from central.app.ai.budget_ledger import BudgetLedger, BudgetLimits
+
+
+def test_budget_rejects_before_provider_when_daily_limit_is_exceeded():
+    ledger = BudgetLedger(BudgetLimits(max_run_cost_usd=2.0, max_daily_cost_usd=1.0))
+    assert ledger.check_and_reserve("r1", "t1", 0.75, 1, 0).allowed is True
+    decision = ledger.check_and_reserve("r2", "t1", 0.30, 1, 0)
+
+    assert decision.allowed is False
+    assert decision.reason == "AI_BUDGET_EXHAUSTED"
+
+
+def test_budget_allows_exact_limit_and_counts_new_products():
+    ledger = BudgetLedger(BudgetLimits(max_run_cost_usd=1.0, max_new_products_per_run=2))
+    assert ledger.check_and_reserve("r1", "t1", 1.0, 1, 2).allowed is True
+    assert ledger.check_and_reserve("r1", "t1", 0.0, 0, 1).allowed is False