Add spec for globalScope.

Author: ghengeveld

packages/react-async/src/globalScope.spec.js

@@ -0,0 +1,11 @@
+import globalScope from "./globalScope"
+
+describe("globalScope", () => {
+  test("returns the global object", () => {
+    expect(globalScope).toBe(global)
+  })
+
+  test("defines __REACT_ASYNC__ object", () => {
+    expect(typeof globalScope.__REACT_ASYNC__).toBe("object")
+  })
+})