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feat: fuel surcharge per lane and cargo type

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Marshal
2026-08-12 13:47:53 +00:00
parent dd39c2be7c
commit ff3cee12e3
4 changed files with 42 additions and 21 deletions
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9
apps/edr-freight-api/src/modules/rule-engine/rule-engine.service.spec.ts
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@@ -475,13 +475,16 @@ describe('RuleEngineService — fuel surcharge (per lane + cargo type)', () => {
const fuelMods = (result: Awaited<ReturnType<RuleEngineService['evaluate']>>) =>
result.appliedModifiers.filter((m) => m.surchargeCode === 'FUEL_SURCHARGE');
it('PER_LITER bills base liters × rate value once, regardless of wagons', async () => {
it('PER_LITER collapses to one flat total (base liters × rate value), regardless of wagons', async () => {
const result = await buildService([fuelPerLiter]).evaluate(fuelInput());
const mods = fuelMods(result);
expect(mods).toHaveLength(1);
expect(mods[0].triggerValue).toBe(100);
// Flat: the customer sees only the total, and a frozen contract snapshot
// (also stored flat) multiplies it by quantity 1 — never by the liters.
expect(mods[0].triggerValue).toBe(1);
expect(mods[0].unitPriceUsd).toBe(200);
expect(mods[0].calculatedAmount).toBe(200);
expect(mods[0].billingUnit).toBe('PER_LITER');
expect(mods[0].billingUnit).toBe('FLAT');
});
it('PER_WAGON bills the wagons the cargo occupies', async () => {