wip: add test for catch block

Author: jsjoeio

test/unit/browser/pages/vscode.test.ts

@@ -66,7 +66,7 @@ describe("vscode", () => {
 
       _document.body.removeChild(mockElement)
     })
-    it("should return have loadBundle property if _resolvedLangaugePackCoreLocation", async () => {
+    it("should return and have a loadBundle property if _resolvedLangaugePackCoreLocation", async () => {
       const mockElement = _document.createElement("div")
       const dataSettings = {
         locale: "en",
@@ -99,6 +99,11 @@ describe("vscode", () => {
       expect(mockCallbackFn).toHaveBeenCalledWith(undefined, { key: "hello world" })
       // 4. call it again and calls the callback with the cached json
 
+      fetchMock.mockReject(new Error("fake error message"))
+      const mockCallbackFn2 = jest.fn((error) => error)
+      const error = await nlsConfig.loadBundle("goodbye", "es", mockCallbackFn2)
+      expect(error.message).toEqual("fake error message")
+
       _document.body.removeChild(mockElement)
     })
   })