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code-server/packages/vscode/test/node-pty.test.ts

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2019-02-19 22:38:17 +01:00
import { IPty } from "node-pty";
import { createClient } from "@coder/protocol/test";
const client = createClient();
jest.mock("../../ide/src/fill/client", () => ({ client }));
const pty = require("../src/fill/node-pty") as typeof import("node-pty");
describe("node-pty", () => {
/**
* Returns a function that when called returns a promise that resolves with
* the next chunk of data from the process.
*/
const promisifyData = (proc: IPty): (() => Promise<string>) => {
// Use a persistent callback instead of creating it in the promise since
// otherwise we could lose data that comes in while no promise is listening.
let onData: (() => void) | undefined;
let buffer: string | undefined;
proc.on("data", (data) => {
// Remove everything that isn't a letter, number, or $ to avoid issues
// with ANSI escape codes printing inside the test output.
buffer = (buffer || "") + data.toString().replace(/[^a-zA-Z0-9$]/g, "");
if (onData) {
onData();
}
});
return (): Promise<string> => new Promise((resolve): void => {
onData = (): void => {
if (typeof buffer !== "undefined") {
const data = buffer;
buffer = undefined;
onData = undefined;
resolve(data);
}
};
onData();
});
};
it("should create shell", async () => {
// Setting the config file to something that shouldn't exist so the test
// isn't affected by custom configuration.
const proc = pty.spawn("/bin/bash", ["--rcfile", "/tmp/test/nope/should/not/exist"], {
cols: 100,
rows: 10,
});
const getData = promisifyData(proc);
// First it outputs @hostname:cwd
expect((await getData()).length).toBeGreaterThan(1);
// Then it seems to overwrite that with a shorter prompt in the format of
// [hostname@user]$
expect((await getData())).toContain("$");
proc.kill();
await new Promise((resolve): void => {
proc.on("exit", resolve);
});
});
it("should resize", async () => {
// Requires the `tput lines` cmd to be available.
// Setting the config file to something that shouldn't exist so the test
// isn't affected by custom configuration.
const proc = pty.spawn("/bin/bash", ["--rcfile", "/tmp/test/nope/should/not/exist"], {
cols: 10,
rows: 10,
});
const getData = promisifyData(proc);
// We've already tested these first two bits of output; see shell test.
await getData();
await getData();
proc.write("tput lines\n");
expect(await getData()).toContain("tput");
expect((await getData()).trim()).toContain("10");
proc.resize(10, 50);
// The prompt again.
await getData();
await getData();
proc.write("tput lines\n");
expect(await getData()).toContain("tput");
expect((await getData())).toContain("50");
proc.kill();
await new Promise((resolve): void => {
proc.on("exit", resolve);
});
});
});