106 lines
3.4 KiB
TypeScript
106 lines
3.4 KiB
TypeScript
import { content } from "@deadhead/content";
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import { describe, expect, it } from "vitest";
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import {
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createDispatchRecord,
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resolveDispatch,
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splitLoanRepayment,
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type Contract,
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pilotShare,
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} from "../src/index";
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/** Fuel enough for any leg in these tests (decision 0.5.94), bought at 10 cr/fu. */
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const PLENTY = { fuelFu: 10_000, avgPrice: 10 };
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describe("loan repayment split", () => {
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it("takes min(balance, credits × share), rounded down to whole credits", () => {
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expect(splitLoanRepayment(1000, 5000, 0.3)).toEqual({ repayment: 300, net: 700 });
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expect(splitLoanRepayment(1001, 5000, 0.3)).toEqual({ repayment: 300, net: 701 });
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expect(splitLoanRepayment(1000, 120, 0.3)).toEqual({ repayment: 120, net: 880 });
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});
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it("takes nothing when there is no balance, or no positive payout", () => {
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expect(splitLoanRepayment(1000, 0, 0.3)).toEqual({ repayment: 0, net: 1000 });
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expect(splitLoanRepayment(0, 5000, 0.3)).toEqual({ repayment: 0, net: 0 });
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expect(splitLoanRepayment(-60, 5000, 0.3)).toEqual({ repayment: 0, net: -60 });
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});
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it("always splits the whole amount and never repays more than the balance", () => {
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for (const credits of [-500, -1, 0, 1, 7, 99, 1000, 123_457]) {
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for (const balance of [0, 1, 50, 299, 5000, 1_000_000]) {
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for (const share of [0, 0.1, 0.3, 1]) {
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const { repayment, net } = splitLoanRepayment(credits, balance, share);
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expect(net + repayment).toBe(credits);
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expect(repayment).toBeLessThanOrEqual(balance);
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expect(repayment).toBeGreaterThanOrEqual(0);
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expect(repayment).toBe(
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credits > 0 && balance > 0 ? Math.min(balance, Math.floor(credits * share)) : 0,
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);
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}
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}
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}
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});
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});
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describe("resolution with a loan", () => {
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const now = Date.parse("2100-01-01T00:30:00Z");
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const contract: Contract = {
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id: "c1",
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originId: "earth",
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destinationId: "moon",
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cargoTypeId: "standard",
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goodId: "consumer-goods",
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shipper: "Pacific Orbital Logistics",
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priority: false,
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deliveryWindowGameHours: null,
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tier: 0,
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massTonnes: 10,
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payout: 2000,
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requiredSkill: null,
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requiredLongHaulLevel: 0,
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offeredAt: now,
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expiresAt: now + 3_600_000,
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firstContact: false,
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};
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const record = createDispatchRecord(
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{
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id: "d1",
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ship: { id: "s1", modelId: "courier", locationId: "earth", inFlight: false, tank: PLENTY },
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pilot: {
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id: "p1",
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isAvatar: false,
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assignedShipId: "s1",
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inFlight: false,
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skills: {},
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restEndsAt: null,
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},
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contract,
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tutorial: false,
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now,
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worldSeed: 7,
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},
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content,
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);
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it("returns the repayment alongside the credits to add, after pilot pay", () => {
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const result = resolveDispatch(
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{
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record,
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pilotIsAvatar: false,
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discoveredIds: new Set(["earth", "moon"]),
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loanBalance: 5000,
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pilotDutyHours: 0,
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pilotSkills: {},
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now: record.arrivalAt,
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},
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content,
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);
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if (result.status !== "resolved") throw new Error("expected a resolution");
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const afterPay = 2000 - pilotShare(2000, record.fuelCost, content.config);
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const repayment = Math.floor(afterPay * content.config.loanRepaymentShare);
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expect(result.resolution).toMatchObject({
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loanRepayment: repayment,
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credits: afterPay - repayment,
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});
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});
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});
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