wlfb
020f41e9f2
Implementiert Task 5 mit TDD-Ansatz: projection.py mit Projection-Klasse und project()-Funktion für Cashflow-Simulation; scenario.py mit PlainRecurring, PlainPlanned, PlainModifier Dataclasses und build_cashflows() für Szenarien-Zahlungsströme mit Modifier-Support (remove, percent, absolute). Alle 15 Tests grün. Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
38 lines
1.8 KiB
Python
38 lines
1.8 KiB
Python
from datetime import date
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from decimal import Decimal
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from app.engine.loans import loan_schedule
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from app.engine.scenario import (PlainModifier, PlainPlanned, PlainRecurring,
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build_cashflows)
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W = (date(2026, 8, 1), date(2026, 10, 31))
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def test_recurring_with_percent_cut():
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rec = [PlainRecurring(id=1, name="Marketing", amount=Decimal("-1000"),
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rhythm="monthly", due_day=5, start_date=None,
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end_date=None, category_id=7)]
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mods = [PlainModifier(target_type="category", target_id=7,
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kind="percent", value=Decimal("50"))]
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flows = build_cashflows(rec, [], [], [], mods, *W)
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assert flows == [(date(2026, 8, 5), Decimal("-500.00")),
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(date(2026, 9, 5), Decimal("-500.00")),
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(date(2026, 10, 5), Decimal("-500.00"))]
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def test_remove_modifier_and_planned_and_loan():
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rec = [PlainRecurring(id=2, name="Abo", amount=Decimal("-50"),
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rhythm="monthly", due_day=1, start_date=None,
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end_date=None, category_id=None)]
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mods = [PlainModifier(target_type="recurring", target_id=2,
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kind="remove", value=Decimal("0"))]
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planned = [PlainPlanned(name="Steuer", amount=Decimal("-2000"),
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due=date(2026, 9, 15), category_id=None)]
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sched = loan_schedule(Decimal("10000"), Decimal("6"), 48, date(2026, 8, 1), "annuity")
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flows = build_cashflows(rec, planned, [sched],
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[(date(2026, 8, 1), Decimal("10000"))], mods, *W)
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days = [d for d, _ in flows]
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assert date(2026, 8, 1) in days # Kredit-Auszahlung
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assert date(2026, 9, 15) in days # Einmalposten
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assert all(a != Decimal("-50") for _, a in flows) # Abo entfernt
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