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code-server/test/unit/node/app.test.ts
Joe Previte 86c8590bd5
feat(testing): add test for app > listen (#4971)
* feat(testing): add test for app > listen

* Update test/unit/node/app.test.ts

* refactor: modernize listen fn in app

* wip

* fix: update error message

* fixup: remove console.log

* fixup: use clearAllMocks once in beforeAll

* fix: move chmod after socket listen

* fixup: formatting

* Update src/node/app.ts

Co-authored-by: Jonathan Yu <jonathan@coder.com>

* Update src/node/app.ts

Co-authored-by: Asher <ash@coder.com>

Co-authored-by: Jonathan Yu <jonathan@coder.com>
Co-authored-by: Asher <ash@coder.com>
2022-03-11 16:54:59 -07:00

286 lines
7.9 KiB
TypeScript

import { logger } from "@coder/logger"
import { promises } from "fs"
import * as http from "http"
import * as https from "https"
import * as path from "path"
import { createApp, ensureAddress, handleArgsSocketCatchError, handleServerError, listen } from "../../../src/node/app"
import { OptionalString, setDefaults } from "../../../src/node/cli"
import { generateCertificate } from "../../../src/node/util"
import { clean, mockLogger, getAvailablePort, tmpdir } from "../../utils/helpers"
describe("createApp", () => {
let unlinkSpy: jest.SpyInstance
let port: number
let tmpDirPath: string
let tmpFilePath: string
beforeAll(async () => {
mockLogger()
const testName = "unlink-socket"
await clean(testName)
tmpDirPath = await tmpdir(testName)
tmpFilePath = path.join(tmpDirPath, "unlink-socket-file")
})
beforeEach(async () => {
// NOTE:@jsjoeio
// Be mindful when spying.
// You can't spy on fs functions if you do import * as fs
// You have to import individually, like we do here with promises
// then you can spy on those modules methods, like unlink.
// See: https://github.com/aelbore/esbuild-jest/issues/26#issuecomment-893763840
unlinkSpy = jest.spyOn(promises, "unlink")
port = await getAvailablePort()
})
afterEach(() => {
jest.clearAllMocks()
})
it("should return an Express app, a WebSockets Express app and an http server", async () => {
const defaultArgs = await setDefaults({
port,
})
const app = await createApp(defaultArgs)
// This doesn't check much, but it's a good sanity check
// to ensure we actually get back values from createApp
expect(app.router).not.toBeNull()
expect(app.wsRouter).not.toBeNull()
expect(app.server).toBeInstanceOf(http.Server)
// Cleanup
app.dispose()
})
it("should handle error events on the server", async () => {
const defaultArgs = await setDefaults({
port,
})
const app = await createApp(defaultArgs)
const testError = new Error("Test error")
// We can easily test how the server handles errors
// By emitting an error event
// Ref: https://stackoverflow.com/a/33872506/3015595
app.server.emit("error", testError)
expect(logger.error).toHaveBeenCalledTimes(1)
expect(logger.error).toHaveBeenCalledWith(`http server error: ${testError.message} ${testError.stack}`)
// Cleanup
app.dispose()
})
it("should reject errors that happen before the server can listen", async () => {
// We listen on an invalid port
// causing the app to reject the Promise called at startup
const port = 2
const defaultArgs = await setDefaults({
port,
})
async function masterBall() {
const app = await createApp(defaultArgs)
const testError = new Error("Test error")
app.server.emit("error", testError)
// Cleanup
app.dispose()
}
expect(() => masterBall()).rejects.toThrow(`listen EACCES: permission denied 127.0.0.1:${port}`)
})
it("should unlink a socket before listening on the socket", async () => {
await promises.writeFile(tmpFilePath, "")
const defaultArgs = await setDefaults({
socket: tmpFilePath,
})
const app = await createApp(defaultArgs)
expect(unlinkSpy).toHaveBeenCalledTimes(1)
app.dispose()
})
it("should change the file mode of a socket", async () => {
const defaultArgs = await setDefaults({
socket: tmpFilePath,
"socket-mode": "777",
})
const app = await createApp(defaultArgs)
expect((await promises.stat(tmpFilePath)).mode & 0o777).toBe(0o777)
app.dispose()
})
it("should create an https server if args.cert exists", async () => {
const testCertificate = await generateCertificate("localhost")
const cert = new OptionalString(testCertificate.cert)
const defaultArgs = await setDefaults({
port,
cert,
["cert-key"]: testCertificate.certKey,
})
const app = await createApp(defaultArgs)
// This doesn't check much, but it's a good sanity check
// to ensure we actually get an https.Server
expect(app.server).toBeInstanceOf(https.Server)
// Cleanup
app.dispose()
})
})
describe("ensureAddress", () => {
let mockServer: http.Server
beforeEach(() => {
mockServer = http.createServer()
})
afterEach(() => {
mockServer.close()
})
it("should throw and error if no address", () => {
expect(() => ensureAddress(mockServer, "http")).toThrow("Server has no address")
})
it("should return the address if it exists", async () => {
mockServer.address = () => "http://localhost:8080/"
const address = ensureAddress(mockServer, "http")
expect(address.toString()).toBe(`http://localhost:8080/`)
})
})
describe("handleServerError", () => {
beforeAll(() => {
mockLogger()
})
afterEach(() => {
jest.clearAllMocks()
})
it("should call reject if resolved is false", async () => {
const resolved = false
const reject = jest.fn((err: Error) => undefined)
const error = new Error("handleServerError Error")
handleServerError(resolved, error, reject)
expect(reject).toHaveBeenCalledTimes(1)
expect(reject).toHaveBeenCalledWith(error)
})
it("should log an error if resolved is true", async () => {
const resolved = true
const reject = jest.fn((err: Error) => undefined)
const error = new Error("handleServerError Error")
handleServerError(resolved, error, reject)
expect(logger.error).toHaveBeenCalledTimes(1)
expect(logger.error).toHaveBeenCalledWith(`http server error: ${error.message} ${error.stack}`)
})
})
describe("handleArgsSocketCatchError", () => {
beforeAll(() => {
mockLogger()
})
afterEach(() => {
jest.clearAllMocks()
})
it("should log an error if its not an NodeJS.ErrnoException", () => {
const message = "other message"
const error = new Error(message)
expect(() => {
handleArgsSocketCatchError(error)
}).toThrowError(error)
})
it("should log an error if its not an NodeJS.ErrnoException (and the error has a message)", () => {
const errorMessage = "handleArgsSocketCatchError Error"
const error = new Error(errorMessage)
expect(() => {
handleArgsSocketCatchError(error)
}).toThrowError(error)
})
it("should not log an error if its a NodeJS.ErrnoException", () => {
const code = "ENOENT"
const error: NodeJS.ErrnoException = new Error(code)
error.code = code
handleArgsSocketCatchError(error)
expect(() => {
handleArgsSocketCatchError(error)
}).not.toThrowError()
})
it("should log an error if the code is not ENOENT (and the error has a message)", () => {
const errorMessage = "no access"
const error: NodeJS.ErrnoException = new Error()
error.code = "EACCESS"
error.message = errorMessage
expect(() => {
handleArgsSocketCatchError(error)
}).toThrowError(error)
})
it("should log an error if the code is not ENOENT", () => {
const code = "EACCESS"
const error: NodeJS.ErrnoException = new Error(code)
error.code = code
expect(() => {
handleArgsSocketCatchError(error)
}).toThrowError(error)
})
})
describe("listen", () => {
let tmpDirPath: string
let mockServer: http.Server
const testName = "listen"
beforeEach(async () => {
await clean(testName)
mockLogger()
tmpDirPath = await tmpdir(testName)
mockServer = http.createServer()
})
afterEach(() => {
mockServer.close()
jest.clearAllMocks()
})
it("should throw an error if a directory is passed in instead of a file", async () => {
const errorMessage = "EISDIR: illegal operation on a directory, unlink"
const port = await getAvailablePort()
const mockArgs = { port, host: "0.0.0.0", socket: tmpDirPath }
try {
await listen(mockServer, mockArgs)
} catch (error) {
expect(error).toBeInstanceOf(Error)
expect((error as any).message).toMatch(errorMessage)
}
})
})