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Ergänzte Tests für Lückenschluss: 1. test_absolute_modifier_reduces_outflow: Absolute Modifier reduziert Ausgaben (-200 - 50 = -150) 2. test_absolute_modifier_clamps_to_zero: Absolute Modifier klemmt auf 0 (nie Vorzeichenflip: -200 + 300 = 0) 3. test_cashflow_on_start_date_excluded: Cashflows am start_date werden ausgeschlossen (Teil des Startsaldos) Alle 18 Tests grün (15 existierend + 3 neu). Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
31 lines
1.2 KiB
Python
31 lines
1.2 KiB
Python
from datetime import date
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from decimal import Decimal
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from app.engine.projection import project
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def test_low_point_and_threshold():
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flows = [(date(2026, 8, 1), Decimal("-150")), (date(2026, 8, 10), Decimal("200"))]
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p = project(Decimal("100"), date(2026, 7, 31), flows, horizon_days=15,
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threshold=Decimal("60"))
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assert p.low_point == (date(2026, 8, 1), Decimal("-50"))
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assert p.first_below_zero == date(2026, 8, 1)
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assert p.first_below_threshold == date(2026, 8, 1)
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assert p.series[-1][1] == Decimal("150")
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def test_no_crossing():
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p = project(Decimal("100"), date(2026, 7, 31), [], horizon_days=5)
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assert p.first_below_zero is None
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assert p.low_point[1] == Decimal("100")
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def test_cashflow_on_start_date_excluded():
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"""Cashflows dated exactly on start_date are excluded (part of starting balance)"""
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p = project(Decimal("100"), date(2026, 8, 1), [(date(2026, 8, 1), Decimal("-999"))],
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horizon_days=5)
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# All balances remain 100 because the -999 flow on start_date is ignored
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assert all(bal == Decimal("100") for _, bal in p.series)
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assert p.first_below_zero is None
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assert p.low_point[1] == Decimal("100")
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