33 lines
1.1 KiB
TypeScript
33 lines
1.1 KiB
TypeScript
import { applyMonthlyCredit } from '../src/billing/credit';
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import { DEFAULT_TIERS } from '../src/pricing';
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import { UsageSummary } from '../src/usage';
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const freeTier = DEFAULT_TIERS.find((t) => t.id === 'free')!; // monthlyCreditCents: 100
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const summary = (totalCents: number): UsageSummary => ({
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customerId: 'cust_1',
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totalCents,
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calls: 1,
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byEndpoint: {},
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});
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describe('applyMonthlyCredit', () => {
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it('covers usage fully when under the monthly credit', () => {
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const billed = applyMonthlyCredit(summary(60), freeTier);
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expect(billed.includedCents).toBe(60);
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expect(billed.billableCents).toBe(0);
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expect(billed.totalCents).toBe(60);
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});
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it('bills only the overage when usage exceeds the credit', () => {
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const billed = applyMonthlyCredit(summary(250), freeTier);
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expect(billed.includedCents).toBe(100);
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expect(billed.billableCents).toBe(150);
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});
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it('bills nothing when there is no usage', () => {
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const billed = applyMonthlyCredit(summary(0), freeTier);
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expect(billed.includedCents).toBe(0);
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expect(billed.billableCents).toBe(0);
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});
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});
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