context-cache.test.ts
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context-cache.test.ts
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	import assert from "assert";
	import { sleep } from "../test_utils/sleep.js";
	import { withStoppedApp } from "../test_utils/with-test-app.js";
	import extract_context from "./extract-context.js";

	describe("Context cache", () => {
	it("Runs the getter only once when dealing with a sequential scenario", async () =>
	withStoppedApp(null, async ({ app, rest_api, router }) => {
	let calls = 0;
	router.get("/custom", extract_context(), async (ctx) => {
	await ctx.$cache("cached", async () => {
	calls++;
	});
	await ctx.$cache("cached", async () => {
	calls++;
	});
	ctx.status = 200;
	return "OK";
	});
	await app.start();
	await sleep(100);
	await rest_api.get("/custom");
	assert.strictEqual(calls, 1);
	}));

	it("Runs the getter only once when dealing with a parallel scenario", async () =>
	withStoppedApp(null, async ({ app, rest_api, router }) => {
	let calls = 0;
	router.get("/custom", extract_context(), async (ctx) => {
	await Promise.all([
	ctx.$cache("cached", async () => {
	calls++;
	}),
	ctx.$cache("cached", async () => {
	calls++;
	}),
	]);
	ctx.status = 200;
	return "OK";
	});
	await app.start();
	await sleep(100);
	await rest_api.get("/custom");
	assert.strictEqual(calls, 1);
	}));
	});