0pt/tests/document-workbench/credit-quote.test.ts

import { describe, expect, it } from 'vitest';
import { quoteMaximumCredits } from '../../src/document-workbench/credit-quote';

describe('credit quote', () => {
  it('rounds each component up exactly and retains the price book version', () => {
    expect(
      quoteMaximumCredits('v1', [
        { metric: 'pages', maxUnits: 11, creditsPerBlock: 3, unitsPerBlock: 10 },
        { metric: 'tokens', maxUnits: 2000, creditsPerBlock: 2, unitsPerBlock: 1000 },
      ]),
    ).toMatchObject({ priceBookVersion: 'v1', maximumCredits: 10 });
  });
  it('does not charge an unused component', () => {
    expect(
      quoteMaximumCredits('v1', [{ metric: 'pages', maxUnits: 0, creditsPerBlock: 1, unitsPerBlock: 10 }])
        .maximumCredits,
    ).toBe(0);
  });
  it('rejects fractional, negative, duplicate and overflowing quantities', () => {
    const line = { metric: 'pages', maxUnits: 1, creditsPerBlock: 1, unitsPerBlock: 1 };
    expect(() => quoteMaximumCredits('', [line])).toThrow();
    expect(() => quoteMaximumCredits('v1', [line, line])).toThrow();
    expect(() => quoteMaximumCredits('v1', [{ ...line, maxUnits: 0.5 }])).toThrow();
    expect(() => quoteMaximumCredits('v1', [{ ...line, creditsPerBlock: -1 }])).toThrow();
    expect(() => quoteMaximumCredits('v1', [{ ...line, unitsPerBlock: 0 }])).toThrow();
    expect(() =>
      quoteMaximumCredits('v1', [{ ...line, maxUnits: Number.MAX_SAFE_INTEGER, creditsPerBlock: 2 }]),
    ).toThrow();
  });
});