code-server/test/unit/browser/vscode.test.ts

/**
 * @jest-environment jsdom
 */
import { JSDOM } from "jsdom"
import { getNlsConfiguration, nlsConfigElementId } from "../../../src/browser/pages/vscode"

describe("vscode", () => {
  describe("getNlsConfiguration", () => {
    beforeEach(() => {
      const { window } = new JSDOM()
      global.document = window.document
    })

    it("should throw an error if Document is undefined", () => {
      const errorMsgPrefix = "[vscode]"
      const errorMessage = `${errorMsgPrefix} Could not parse NLS configuration. document is undefined.`

      expect(() => {
        getNlsConfiguration(undefined as any as Document)
      }).toThrowError(errorMessage)
    })
    it("should throw an error if no nlsConfigElement", () => {
      const errorMsgPrefix = "[vscode]"
      const errorMessage = `${errorMsgPrefix} Could not parse NLS configuration. Could not find nlsConfigElement with id: ${nlsConfigElementId}`

      expect(() => {
        getNlsConfiguration(document)
      }).toThrowError(errorMessage)
    })
    it("should throw an error if no nlsConfig", () => {
      const mockElement = document.createElement("div")
      mockElement.setAttribute("id", nlsConfigElementId)
      document.body.appendChild(mockElement)

      const errorMsgPrefix = "[vscode]"
      const errorMessage = `${errorMsgPrefix} Could not parse NLS configuration. Found nlsConfigElement but missing data-settings attribute.`

      expect(() => {
        getNlsConfiguration(document)
      }).toThrowError(errorMessage)

      document.body.removeChild(mockElement)
    })
    it("should return the correct configuration", () => {
      const mockElement = document.createElement("div")
      const dataSettings = {
        first: "Jane",
        last: "Doe",
      }

      mockElement.setAttribute("id", nlsConfigElementId)
      mockElement.setAttribute("data-settings", JSON.stringify(dataSettings))
      document.body.appendChild(mockElement)
      const actual = getNlsConfiguration(global.document)

      expect(actual).toStrictEqual(dataSettings)

      document.body.removeChild(mockElement)
    })
  })
})