Fix Windows CI (#1669)

Summary: Pull Request resolved: #1669

Differential Revision: D96358393

Author: robhogan

packages/metro/src/DeltaBundler/__tests__/DeltaCalculator-context-test.js

@@ -64,7 +64,7 @@ describe('DeltaCalculator + require.context', () => {
 
   beforeEach(async () => {
     fileWatcher = new EventEmitter();
-    emitChange = createEmitChange(fileWatcher, '/');
+    emitChange = createEmitChange(fileWatcher, '/', '/');
 
     markModifiedContextModules.mockImplementation(function <T>(
       this: Graph<T>,

packages/metro/src/DeltaBundler/__tests__/test-utils.js

@@ -11,6 +11,8 @@
 
 import type EventEmitter from 'events';
 
+import path from 'path';
+
 export type FileEntry =
   | string
   | [string, {isSymlink?: boolean, modifiedTime?: number}];
@@ -27,8 +29,8 @@ export type ChangeEventInput = {
  */
 export function createEmitChange(
   fileWatcher: EventEmitter,
-  rootDir: string,
-  pathSeparator: string = '/',
+  rootDir: string = process.platform === 'win32' ? 'C:\\' : '/',
+  pathSeparator: string = path.sep,
 ): (changes: ChangeEventInput) => void {
   return function emitChange(changes: ChangeEventInput): void {
     const toEntry = (

scripts/__tests__/ts-defs-sync-test.js

@@ -28,4 +28,4 @@ test('TypeScript defs are in sync (yarn run build-ts-defs produces no changes)',
     expect(error.errors).toEqual([]);
   }
   expect(error).toBeUndefined();
-}, 30000);
+}, 60000);