51 lines
2.1 KiB
JavaScript
51 lines
2.1 KiB
JavaScript
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import assert from "node:assert/strict";
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import { test } from "node:test";
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import { fetchLemfiRate, parseLemfiQuote } from "../utils/lemfi.js";
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// Captured from LemFi's Netherlands EUR → NGN calculator endpoint.
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const quote = {
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exchange_from: "EUR",
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exchange_to: "NGN",
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rate: "9.8057976951626334827662874e+25",
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ID: "64eeb42d-7f05-4b50-a172-5e581358517a",
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};
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test("decodes the live quote to the rate displayed by LemFi", () => {
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assert.equal(parseLemfiQuote({ data: quote }), 1522);
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});
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test("keeps promotional rewards out of the base rate comparison", () => {
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assert.equal(parseLemfiQuote({ data: { ...quote, promotion_rate: { rate: "1e30" } } }), 1522);
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});
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test("rejects malformed rates and currency pairs", () => {
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for (const change of [
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{ exchange_from: "GBP" }, { exchange_to: "USD" },
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{ rate: undefined }, { rate: "invalid" }, { rate: true },
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{ rate: "Infinity" }, { rate: "0" }, { rate: "-1" },
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{ ID: undefined }, { ID: "abc" }, { ID: "000" },
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]) {
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assert.throws(() => parseLemfiQuote({ data: { ...quote, ...change } }));
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}
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assert.throws(() => parseLemfiQuote({}));
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});
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test("requests the EUR to NGN Netherlands quote with a timeout", async (t) => {
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t.mock.method(globalThis, "fetch", async (url, options) => {
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assert.equal(url.origin + url.pathname, "https://lemfi.com/api/exchange-quote");
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assert.deepEqual(Object.fromEntries(url.searchParams), {
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from: "EUR", to: "NGN", country: "Netherlands", lang: "en",
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});
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assert.ok(options.signal instanceof AbortSignal);
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return { ok: true, json: async () => ({ data: quote }) };
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});
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assert.equal(await fetchLemfiRate(), 1522);
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});
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test("rejects upstream HTTP and network errors", async (t) => {
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const fetchMock = t.mock.method(globalThis, "fetch", async () => ({ ok: false, status: 503 }));
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await assert.rejects(fetchLemfiRate(), /503/);
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fetchMock.mock.mockImplementation(async () => { throw new Error("Network unavailable"); });
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await assert.rejects(fetchLemfiRate(), /Network unavailable/);
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});
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