code-server/packages/protocol/test/evaluate.test.ts

import { createClient } from "./helpers";

describe("Evaluate", () => {
	const client = createClient();

	it("should transfer string", async () => {
		const value = await client.evaluate(() => {
			return "hi";
		});

		expect(value).toEqual("hi");
	}, 100);

	it("should compute from string", async () => {
		const start = "ban\%\$\"``a,,,,asdasd";
		const value = await client.evaluate((a) => {
			return a;
		}, start);

		expect(value).toEqual(start);
	}, 100);

	it("should compute from object", async () => {
		const value = await client.evaluate((arg) => {
			return arg.bananas * 2;
		}, { bananas: 1 });

		expect(value).toEqual(2);
	}, 100);

	it("should transfer object", async () => {
		const value = await client.evaluate(() => {
			return { alpha: "beta" };
		});

		expect(value.alpha).toEqual("beta");
	}, 100);

	it("should require", async () => {
		const value = await client.evaluate(() => {
			const fs = require("fs") as typeof import("fs");

			return Object.keys(fs).filter((f) => f === "readFileSync");
		});

		expect(value[0]).toEqual("readFileSync");
	}, 100);

	it("should resolve with promise", async () => {
		const value = await client.evaluate(async () => {
			await new Promise((r): number => setTimeout(r, 100));

			return "donkey";
		});

		expect(value).toEqual("donkey");
	}, 250);

	it("should do active process", (done) => {
		const runner = client.run((ae) => {
			ae.on("first", () => {
				ae.emit("first:response");
				ae.on("second", () => ae.emit("second:response"));
			});

			const disposeCallbacks = <Array<() => void>>[];
			const dispose = (): void => {
				disposeCallbacks.forEach((cb) => cb());
				ae.emit("disposed");
			};

			return {
				onDidDispose: (cb: () => void): number => disposeCallbacks.push(cb),
				dispose,
			};
		});

		runner.emit("first");
		runner.on("first:response", () => runner.emit("second"));
		runner.on("second:response", () => client.dispose());

		runner.on("disposed", () => done());
	});
});