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cacheEntryStale.test.mjs
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// @ts-check
import "./test/polyfillCustomEvent.mjs";
import { deepStrictEqual, strictEqual, throws } from "node:assert";
import { describe, it } from "node:test";
import Cache from "./Cache.mjs";
import cacheEntryStale from "./cacheEntryStale.mjs";
import assertBundleSize from "./test/assertBundleSize.mjs";
import assertInstanceOf from "./test/assertInstanceOf.mjs";
describe("Function `cacheEntryStale`.", { concurrency: true }, () => {
it("Bundle size.", async () => {
await assertBundleSize(
new URL("./cacheEntryStale.mjs", import.meta.url),
350,
);
});
it("Argument 1 `cache` not a `Cache` instance.", () => {
throws(() => {
cacheEntryStale(
// @ts-expect-error Testing invalid.
true,
"a",
);
}, new TypeError("Argument 1 `cache` must be a `Cache` instance."));
});
it("Argument 2 `cacheKey` not a string.", () => {
throws(() => {
cacheEntryStale(
new Cache(),
// @ts-expect-error Testing invalid.
true,
);
}, new TypeError("Argument 2 `cacheKey` must be a string."));
});
it("Entry not populated.", () => {
const cacheKey = "a";
throws(
() => {
cacheEntryStale(new Cache(), cacheKey);
},
new Error(`Cache key \`${cacheKey}\` isn’t in the store.`),
);
});
it("Entry populated.", () => {
const cacheKey = "a";
const initialCacheStore = { [cacheKey]: 1 };
const cache = new Cache({ ...initialCacheStore });
/** @type {Array<Event>} */
const events = [];
const staleEventName = `${cacheKey}/stale`;
cache.addEventListener(staleEventName, (event) => {
events.push(event);
});
cacheEntryStale(cache, cacheKey);
strictEqual(events.length, 1);
assertInstanceOf(events[0], CustomEvent);
strictEqual(events[0].type, staleEventName);
strictEqual(events[0].cancelable, false);
deepStrictEqual(cache.store, initialCacheStore);
});
});