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code-server/test/e2e/models/CodeServer.ts
2021-09-15 14:54:33 -04:00

336 lines
10 KiB
TypeScript

import { Logger, logger } from "@coder/logger"
import * as cp from "child_process"
import { promises as fs } from "fs"
import * as path from "path"
import { Page } from "playwright"
import { onLine } from "../../../src/node/util"
import { PASSWORD, workspaceDir } from "../../utils/constants"
import { tmpdir } from "../../utils/helpers"
interface CodeServerProcess {
process: cp.ChildProcess
address: string
}
class CancelToken {
private _canceled = false
public canceled(): boolean {
return this._canceled
}
public cancel(): void {
this._canceled = true
}
}
/**
* Class for spawning and managing code-server.
*/
export class CodeServer {
private process: Promise<CodeServerProcess> | undefined
public readonly logger: Logger
private closed = false
constructor(name: string) {
this.logger = logger.named(name)
}
/**
* The address at which code-server can be accessed. Spawns code-server if it
* has not yet been spawned.
*/
async address(): Promise<string> {
if (!this.process) {
this.process = this.spawn()
}
const { address } = await this.process
return address
}
/**
* Create a random workspace and seed it with settings.
*/
private async createWorkspace(): Promise<string> {
const dir = await tmpdir(workspaceDir)
await fs.mkdir(path.join(dir, ".vscode"))
await fs.writeFile(
path.join(dir, ".vscode/settings.json"),
JSON.stringify({
"workbench.startupEditor": "none",
}),
"utf8",
)
return dir
}
/**
* Spawn a new code-server process with its own workspace and data
* directories.
*/
private async spawn(): Promise<CodeServerProcess> {
// This will be used both as the workspace and data directory to ensure
// instances don't bleed into each other.
const dir = await this.createWorkspace()
return new Promise((resolve, reject) => {
this.logger.debug("spawning")
const proc = cp.spawn(
"node",
[
process.env.CODE_SERVER_TEST_ENTRY || ".",
// Using port zero will spawn on a random port.
"--bind-addr",
"127.0.0.1:0",
// Setting the XDG variables would be easier and more thorough but the
// modules we import ignores those variables for non-Linux operating
// systems so use these flags instead.
"--config",
path.join(dir, "config.yaml"),
"--user-data-dir",
dir,
// The last argument is the workspace to open.
dir,
],
{
cwd: path.join(__dirname, "../../.."),
env: {
...process.env,
PASSWORD,
},
},
)
proc.on("error", (error) => {
this.logger.error(error.message)
reject(error)
})
proc.on("close", () => {
const error = new Error("closed unexpectedly")
if (!this.closed) {
this.logger.error(error.message)
}
reject(error)
})
let resolved = false
proc.stdout.setEncoding("utf8")
onLine(proc, (line) => {
// Log the line without the timestamp.
this.logger.trace(line.replace(/\[.+\]/, ""))
if (resolved) {
return
}
const match = line.trim().match(/HTTP server listening on (https?:\/\/[.:\d]+)$/)
if (match) {
// Cookies don't seem to work on IP address so swap to localhost.
// TODO: Investigate whether this is a bug with code-server.
const address = match[1].replace("127.0.0.1", "localhost")
this.logger.debug(`spawned on ${address}`)
resolved = true
resolve({ process: proc, address })
}
})
})
}
/**
* Close the code-server process.
*/
async close(): Promise<void> {
logger.debug("closing")
if (this.process) {
const proc = (await this.process).process
this.closed = true // To prevent the close handler from erroring.
proc.kill()
}
}
}
/**
* This is a "Page Object Model" (https://playwright.dev/docs/pom/) meant to
* wrap over a page and represent actions on that page in a more readable way.
* This targets a specific code-server instance which must be passed in.
* Navigation and setup performed by this model will cause the code-server
* process to spawn if it hasn't yet.
*/
export class CodeServerPage {
private readonly editorSelector = "div.monaco-workbench"
constructor(private readonly codeServer: CodeServer, public readonly page: Page) {}
address() {
return this.codeServer.address()
}
/**
* Navigate to code-server.
*/
async navigate() {
const address = await this.codeServer.address()
await this.page.goto(address, { waitUntil: "networkidle" })
}
/**
* Checks if the editor is visible
* and that we are connected to the host
*
* Reload until both checks pass
*/
async reloadUntilEditorIsReady() {
this.codeServer.logger.debug("Waiting for editor to be ready...")
const editorIsVisible = await this.isEditorVisible()
const editorIsConnected = await this.isConnected()
let reloadCount = 0
// Occassionally code-server timeouts in Firefox
// we're not sure why
// but usually a reload or two fixes it
// TODO@jsjoeio @oxy look into Firefox reconnection/timeout issues
while (!editorIsVisible && !editorIsConnected) {
// When a reload happens, we want to wait for all resources to be
// loaded completely. Hence why we use that instead of DOMContentLoaded
// Read more: https://thisthat.dev/dom-content-loaded-vs-load/
await this.page.waitForLoadState("load")
// Give it an extra second just in case it's feeling extra slow
await this.page.waitForTimeout(1000)
reloadCount += 1
if ((await this.isEditorVisible()) && (await this.isConnected())) {
this.codeServer.logger.debug(`editor became ready after ${reloadCount} reloads`)
break
}
await this.page.reload()
}
this.codeServer.logger.debug("Editor is ready!")
}
/**
* Checks if the editor is visible
*/
async isEditorVisible() {
this.codeServer.logger.debug("Waiting for editor to be visible...")
// Make sure the editor actually loaded
await this.page.waitForSelector(this.editorSelector)
const visible = await this.page.isVisible(this.editorSelector)
this.codeServer.logger.debug(`Editor is ${visible ? "not visible" : "visible"}!`)
return visible
}
/**
* Checks if the editor is visible
*/
async isConnected() {
this.codeServer.logger.debug("Waiting for network idle...")
await this.page.waitForLoadState("networkidle")
const host = new URL(await this.codeServer.address()).host
// NOTE: This seems to be pretty brittle between version changes.
const hostSelector = `[aria-label="remote ${host}"]`
this.codeServer.logger.debug(`Waiting selector: ${hostSelector}`)
await this.page.waitForSelector(hostSelector)
return await this.page.isVisible(hostSelector)
}
/**
* Focuses Integrated Terminal
* by using "Terminal: Focus Terminal"
* from the Command Palette
*
* This should focus the terminal no matter
* if it already has focus and/or is or isn't
* visible already.
*/
async focusTerminal() {
await this.executeCommandViaMenus("Terminal: Focus Terminal")
// Wait for terminal textarea to show up
await this.page.waitForSelector("textarea.xterm-helper-textarea")
}
/**
* Navigate to the command palette via menus then execute a command by typing
* it then clicking the match from the results.
*/
async executeCommandViaMenus(command: string) {
await this.navigateMenus(["View", "Command Palette"])
await this.page.keyboard.type(command)
await this.page.hover(`text=${command}`)
await this.page.click(`text=${command}`)
}
/**
* Navigate through the specified set of menus. If it fails it will keep
* trying.
*/
async navigateMenus(menus: string[]) {
const navigate = async (cancelToken: CancelToken) => {
const steps: Array<() => Promise<unknown>> = [() => this.page.waitForSelector(`${menuSelector}:focus-within`)]
for (const menu of menus) {
// Normally these will wait for the item to be visible and then execute
// the action. The problem is that if the menu closes these will still
// be waiting and continue to execute once the menu is visible again,
// potentially conflicting with the new set of navigations (for example
// if the old promise clicks logout before the new one can). By
// splitting them into two steps each we can cancel before running the
// action.
steps.push(() => this.page.hover(`text=${menu}`, { trial: true }))
steps.push(() => this.page.hover(`text=${menu}`, { force: true }))
steps.push(() => this.page.click(`text=${menu}`, { trial: true }))
steps.push(() => this.page.click(`text=${menu}`, { force: true }))
}
for (const step of steps) {
await step()
if (cancelToken.canceled()) {
this.codeServer.logger.debug("menu navigation canceled")
return false
}
}
return true
}
const menuSelector = '[aria-label="Application Menu"]'
const open = async () => {
await this.page.click(menuSelector)
await this.page.waitForSelector(`${menuSelector}:not(:focus-within)`)
return false
}
// TODO: Starting in 1.57 something closes the menu after opening it if we
// open it too soon. To counter that we'll watch for when the menu loses
// focus and when/if it does we'll try again.
// I tried using the classic menu but it doesn't show up at all for some
// reason. I also tried toggle but the menu disappears after toggling.
let retryCount = 0
let cancelToken = new CancelToken()
while (!(await Promise.race([open(), navigate(cancelToken)]))) {
this.codeServer.logger.debug("menu was closed, retrying")
++retryCount
cancelToken.cancel()
cancelToken = new CancelToken()
}
this.codeServer.logger.debug(`menu navigation retries: ${retryCount}`)
}
/**
* Navigates to code-server then reloads until the editor is ready.
*
* It is recommended to run setup before using this model in any tests.
*/
async setup(authenticated: boolean) {
await this.navigate()
// If we aren't authenticated we'll see a login page so we can't wait until
// the editor is ready.
if (authenticated) {
await this.reloadUntilEditorIsReady()
}
}
}