feat(testing): add unit tests for common/util

test/package.json

@@ -1,11 +1,12 @@
 {
-  "#": "We must put jest in a sub-directory otherwise VS Code somehow picks up",
-  "#": "the types and generates conflicts with mocha.",
+  "#": "We must put jest in a sub-directory otherwise VS Code somehow picks up the types and generates conflicts with mocha.",
   "devDependencies": {
     "@types/jest": "^26.0.20",
+    "@types/jsdom": "^16.2.6",
     "@types/node-fetch": "^2.5.8",
     "@types/supertest": "^2.0.10",
     "jest": "^26.6.3",
+    "jsdom": "^16.4.0",
     "node-fetch": "^2.6.1",
     "playwright": "^1.8.0",
     "supertest": "^6.1.1",

test/util.test.ts

@@ -1,4 +1,25 @@
-import { normalize } from "../src/common/util"
+import { JSDOM } from "jsdom"
+// Note: we need to import logger from the root
+// because this is the logger used in logError in ../src/common/util
+import { logger } from "../node_modules/@coder/logger"
+import {
+  arrayify,
+  generateUuid,
+  getFirstString,
+  getOptions,
+  logError,
+  normalize,
+  plural,
+  resolveBase,
+  split,
+  trimSlashes,
+} from "../src/common/util"
+
+const dom = new JSDOM()
+global.document = dom.window.document
+// global.window = (dom.window as unknown) as Window & typeof globalThis
+
+type LocationLike = Pick<Location, "pathname" | "origin">
 
 describe("util", () => {
   describe("normalize", () => {
@@ -15,4 +36,227 @@ describe("util", () => {
       expect(normalize("qux", true)).toBe("qux")
     })
   })
+
+  describe("split", () => {
+    it("should split at a comma", () => {
+      expect(split("Hello,world", ",")).toStrictEqual(["Hello", "world"])
+    })
+
+    it("shouldn't split if the delimiter doesn't exist", () => {
+      expect(split("Hello world", ",")).toStrictEqual(["Hello world", ""])
+    })
+  })
+
+  describe("plural", () => {
+    it("should add an s if count is greater than 1", () => {
+      expect(plural(2, "dog")).toBe("dogs")
+    })
+    it("should NOT add an s if the count is 1", () => {
+      expect(plural(1, "dog")).toBe("dog")
+    })
+  })
+
+  describe("generateUuid", () => {
+    it("should generate a unique uuid", () => {
+      const uuid = generateUuid()
+      const uuid2 = generateUuid()
+      expect(uuid).toHaveLength(24)
+      expect(typeof uuid).toBe("string")
+      expect(uuid).not.toBe(uuid2)
+    })
+    it("should generate a uuid of a specific length", () => {
+      const uuid = generateUuid(10)
+      expect(uuid).toHaveLength(10)
+    })
+  })
+
+  describe("trimSlashes", () => {
+    it("should remove leading slashes", () => {
+      expect(trimSlashes("/hello-world")).toBe("hello-world")
+    })
+
+    it("should remove trailing slashes", () => {
+      expect(trimSlashes("hello-world/")).toBe("hello-world")
+    })
+
+    it("should remove both leading and trailing slashes", () => {
+      expect(trimSlashes("/hello-world/")).toBe("hello-world")
+    })
+
+    it("should remove multiple leading and trailing slashes", () => {
+      expect(trimSlashes("///hello-world////")).toBe("hello-world")
+    })
+  })
+
+  describe("resolveBase", () => {
+    beforeEach(() => {
+      const location: LocationLike = {
+        pathname: "/healthz",
+        origin: "http://localhost:8080",
+      }
+
+      // Because resolveBase is not a pure function
+      // and relies on the global location to be set
+      // we set it before all the tests
+      // and tell TS that our location should be looked at
+      // as Location (even though it's missing some properties)
+      global.location = location as Location
+    })
+
+    it("should resolve a base", () => {
+      expect(resolveBase("localhost:8080")).toBe("/localhost:8080")
+    })
+
+    it("should resolve a base with a forward slash at the beginning", () => {
+      expect(resolveBase("/localhost:8080")).toBe("/localhost:8080")
+    })
+
+    it("should resolve a base with query params", () => {
+      expect(resolveBase("localhost:8080?folder=hello-world")).toBe("/localhost:8080")
+    })
+
+    it("should resolve a base with a path", () => {
+      expect(resolveBase("localhost:8080/hello/world")).toBe("/localhost:8080/hello/world")
+    })
+
+    it("should resolve a base to an empty string when not provided", () => {
+      expect(resolveBase()).toBe("")
+    })
+  })
+
+  describe("getOptions", () => {
+    // Things to mock
+    // logger
+    // location
+    // document
+    beforeEach(() => {
+      const location: LocationLike = {
+        pathname: "/healthz",
+        origin: "http://localhost:8080",
+        // search: "?environmentId=600e0187-0909d8a00cb0a394720d4dce",
+      }
+
+      // Because resolveBase is not a pure function
+      // and relies on the global location to be set
+      // we set it before all the tests
+      // and tell TS that our location should be looked at
+      // as Location (even though it's missing some properties)
+      global.location = location as Location
+    })
+
+    afterEach(() => {
+      jest.restoreAllMocks()
+    })
+
+    it("should return options with base and cssStaticBase even if it doesn't exist", () => {
+      expect(getOptions()).toStrictEqual({
+        base: "",
+        csStaticBase: "",
+      })
+    })
+
+    it("should return options when they do exist", () => {
+      // Mock getElementById
+      const spy = jest.spyOn(document, "getElementById")
+      // Create a fake element and set the attribute
+      const mockElement = document.createElement("div")
+      mockElement.setAttribute(
+        "data-settings",
+        '{"base":".","csStaticBase":"./static/development/Users/jp/Dev/code-server","logLevel":2,"disableTelemetry":false,"disableUpdateCheck":false}',
+      )
+      // Return mockElement from the spy
+      // this way, when we call "getElementById"
+      // it returns the element
+      spy.mockImplementation(() => mockElement)
+
+      expect(getOptions()).toStrictEqual({
+        base: "",
+        csStaticBase: "/static/development/Users/jp/Dev/code-server",
+        disableTelemetry: false,
+        disableUpdateCheck: false,
+        logLevel: 2,
+      })
+    })
+
+    it("should include queryOpts", () => {
+      // Trying to understand how the implementation works
+      // 1. It grabs the search params from location.search (i.e. ?)
+      // 2. it then grabs the "options" param if it exists
+      // 3. then it creates a new options object
+      // spreads the original options
+      // then parses the queryOpts
+      location.search = '?options={"logLevel":2}'
+      expect(getOptions()).toStrictEqual({
+        base: "",
+        csStaticBase: "",
+        logLevel: 2,
+      })
+    })
+  })
+
+  describe("arrayify", () => {
+    it("should return value it's already an array", () => {
+      expect(arrayify(["hello", "world"])).toStrictEqual(["hello", "world"])
+    })
+
+    it("should wrap the value in an array if not an array", () => {
+      expect(
+        arrayify({
+          name: "Coder",
+          version: "3.8",
+        }),
+      ).toStrictEqual([{ name: "Coder", version: "3.8" }])
+    })
+
+    it("should return an empty array if the value is undefined", () => {
+      expect(arrayify(undefined)).toStrictEqual([])
+    })
+  })
+
+  describe("getFirstString", () => {
+    it("should return the string if passed a string", () => {
+      expect(getFirstString("Hello world!")).toBe("Hello world!")
+    })
+
+    it("should get the first string from an array", () => {
+      expect(getFirstString(["Hello", "World"])).toBe("Hello")
+    })
+
+    it("should return undefined if the value isn't an array or a string", () => {
+      expect(getFirstString({ name: "Coder" })).toBe(undefined)
+    })
+  })
+
+  describe("logError", () => {
+    let spy: jest.SpyInstance
+
+    beforeEach(() => {
+      spy = jest.spyOn(logger, "error")
+    })
+
+    afterEach(() => {
+      jest.clearAllMocks()
+    })
+
+    afterAll(() => {
+      jest.restoreAllMocks()
+    })
+
+    it("should log an error with the message and stack trace", () => {
+      const message = "You don't have access to that folder."
+      const error = new Error(message)
+
+      logError("ui", error)
+
+      expect(spy).toHaveBeenCalled()
+      expect(spy).toHaveBeenCalledWith(`ui: ${error.message} ${error.stack}`)
+    })
+
+    it("should log an error, even if not an instance of error", () => {
+      logError("api", "oh no")
+
+      expect(spy).toHaveBeenCalled()
+      expect(spy).toHaveBeenCalledWith("api: oh no")
+    })
+  })
 })

test/yarn.lock

@@ -551,6 +551,15 @@
     jest-diff "^26.0.0"
     pretty-format "^26.0.0"
 
+"@types/jsdom@^16.2.6":
+  version "16.2.6"
+  resolved "https://registry.yarnpkg.com/@types/jsdom/-/jsdom-16.2.6.tgz#9ddf0521e49be5365797e690c3ba63148e562c29"
+  integrity sha512-yQA+HxknGtW9AkRTNyiSH3OKW5V+WzO8OPTdne99XwJkYC+KYxfNIcoJjeiSqP3V00PUUpFP6Myoo9wdIu78DQ==
+  dependencies:
+    "@types/node" "*"
+    "@types/parse5" "*"
+    "@types/tough-cookie" "*"
+
 "@types/node-fetch@^2.5.8":
   version "2.5.8"
   resolved "https://registry.yarnpkg.com/@types/node-fetch/-/node-fetch-2.5.8.tgz#e199c835d234c7eb0846f6618012e558544ee2fb"
@@ -569,6 +578,11 @@
   resolved "https://registry.yarnpkg.com/@types/normalize-package-data/-/normalize-package-data-2.4.0.tgz#e486d0d97396d79beedd0a6e33f4534ff6b4973e"
   integrity sha512-f5j5b/Gf71L+dbqxIpQ4Z2WlmI/mPJ0fOkGGmFgtb6sAu97EPczzbS3/tJKxmcYDj55OX6ssqwDAWOHIYDRDGA==
 
+"@types/parse5@*":
+  version "6.0.0"
+  resolved "https://registry.yarnpkg.com/@types/parse5/-/parse5-6.0.0.tgz#38590dc2c3cf5717154064e3ee9b6947ee21b299"
+  integrity sha512-oPwPSj4a1wu9rsXTEGIJz91ISU725t0BmSnUhb57sI+M8XEmvUop84lzuiYdq0Y5M6xLY8DBPg0C2xEQKLyvBA==
+
 "@types/prettier@^2.0.0":
   version "2.1.6"
   resolved "https://registry.yarnpkg.com/@types/prettier/-/prettier-2.1.6.tgz#f4b1efa784e8db479cdb8b14403e2144b1e9ff03"
@@ -594,6 +608,11 @@
   dependencies:
     "@types/superagent" "*"
 
+"@types/tough-cookie@*":
+  version "4.0.0"
+  resolved "https://registry.yarnpkg.com/@types/tough-cookie/-/tough-cookie-4.0.0.tgz#fef1904e4668b6e5ecee60c52cc6a078ffa6697d"
+  integrity sha512-I99sngh224D0M7XgW1s120zxCt3VYQ3IQsuw3P3jbq5GG4yc79+ZjyKznyOGIQrflfylLgcfekeZW/vk0yng6A==
+
 "@types/yargs-parser@*":
   version "20.2.0"
   resolved "https://registry.yarnpkg.com/@types/yargs-parser/-/yargs-parser-20.2.0.tgz#dd3e6699ba3237f0348cd085e4698780204842f9"