Move RenderHost initialisation to Jest

Summary:
This diff moves RenderHost initialisation to jest, which is thereby treated as just another 'Host' like flipper-ui, the electron app etc. A benefit is that it provides a mocked flipperServer by default that can be used to mock or intercept requests. See LaunchEmulator.spec as example.

Also made the jest setup scripts strongly typed by converting them to TS.

This change allows the test stub configuration, which was OS dependent, out of flipper-ui-core.

Reviewed By: nikoant

Differential Revision: D32668632

fbshipit-source-id: fac0c09812b000fd7d1acb75010c35573087c99f

desktop/flipper-ui-core/src/RenderHost.tsx

@@ -11,12 +11,7 @@ import type {NotificationEvents} from './dispatcher/notifications';
 import type {PluginNotification} from './reducers/notifications';
 import type {NotificationConstructorOptions} from 'electron';
 import {FlipperLib} from 'flipper-plugin';
-import {
-  FlipperServer,
-  FlipperServerConfig,
-  ReleaseChannel,
-  Tristate,
-} from 'flipper-common';
+import {FlipperServer, FlipperServerConfig} from 'flipper-common';
 
 // Events that are emitted from the main.ts ovr the IPC process bridge in Electron
 type MainProcessEvents = {
@@ -101,7 +96,7 @@ export interface RenderHost {
   openLink(url: string): void;
   loadDefaultPlugins(): Record<string, any>;
   GK(gatekeeper: string): boolean;
-  flipperServer?: FlipperServer;
+  flipperServer: FlipperServer;
   serverConfig: FlipperServerConfig;
 }
 
@@ -111,87 +106,3 @@ export function getRenderHostInstance(): RenderHost {
   }
   return window.FlipperRenderHostInstance;
 }
-
-if (process.env.NODE_ENV === 'test') {
-  const {tmpdir} = require('os');
-  const {resolve} = require('path');
-
-  const rootPath = resolve(__dirname, '..', '..');
-  const stubConfig: FlipperServerConfig = {
-    env: {...process.env},
-    gatekeepers: {
-      TEST_PASSING_GK: true,
-      TEST_FAILING_GK: false,
-    },
-    isProduction: false,
-    launcherSettings: {
-      ignoreLocalPin: false,
-      releaseChannel: ReleaseChannel.DEFAULT,
-    },
-    paths: {
-      appPath: rootPath,
-      desktopPath: `/dev/null`,
-      execPath: process.execPath,
-      homePath: `/dev/null`,
-      staticPath: resolve(rootPath, 'static'),
-      tempPath: tmpdir(),
-    },
-    processConfig: {
-      disabledPlugins: new Set(),
-      lastWindowPosition: null,
-      launcherEnabled: false,
-      launcherMsg: null,
-      screenCapturePath: `/dev/null`,
-    },
-    settings: {
-      androidHome: `/dev/null`,
-      darkMode: 'light',
-      enableAndroid: false,
-      enableIOS: false,
-      enablePhysicalIOS: false,
-      enablePrefetching: Tristate.False,
-      idbPath: `/dev/null`,
-      reactNative: {
-        shortcuts: {enabled: false, openDevMenu: '', reload: ''},
-      },
-      showWelcomeAtStartup: false,
-      suppressPluginErrors: false,
-    },
-    validWebSocketOrigins: [],
-  };
-
-  window.FlipperRenderHostInstance = {
-    processId: -1,
-    isProduction: false,
-    readTextFromClipboard() {
-      return '';
-    },
-    writeTextToClipboard() {},
-    async importFile() {
-      return undefined;
-    },
-    async exportFile() {
-      return undefined;
-    },
-    registerShortcut() {
-      return () => undefined;
-    },
-    hasFocus() {
-      return true;
-    },
-    onIpcEvent() {},
-    sendIpcEvent() {},
-    shouldUseDarkColors() {
-      return false;
-    },
-    restartFlipper() {},
-    openLink() {},
-    serverConfig: stubConfig,
-    loadDefaultPlugins() {
-      return {};
-    },
-    GK(gk) {
-      return stubConfig.gatekeepers[gk] ?? false;
-    },
-  };
-}