Mock web-vitals globally in test setup

ScenarioMonitor subscribes to web-vitals when it is imported, so the onTTFB timer can throw during any suite that outlives it. Mocking it in setupTests.ts keeps that out of individual test files.

src/Platform/Hosted/Components/ConnectExplorer.test.tsx

@@ -1,8 +1,5 @@
 jest.mock("../../../hooks/useDirectories");
 jest.mock("../../../Common/PortalBackendClient");
-// ScenarioMonitor subscribes to web-vitals on import, and onTTFB reads a navigation timing entry that
-// jsdom never produces, throwing from a timer that lands on whichever test happens to be running.
-jest.mock("web-vitals");
 import "@testing-library/jest-dom";
 import { fireEvent, render, screen } from "@testing-library/react";
 import { extractFeatures } from "Platform/Hosted/extractFeatures";
@@ -16,8 +13,7 @@ const mockIsAccountRestricted = isAccountRestrictedForConnectionStringLogin as j
   typeof isAccountRestrictedForConnectionStringLogin
 >;
 
-// fetchEncryptedToken rejects with the raw Response. jsdom implements no part of the fetch API, so
-// there is no Response constructor to build one with.
+// fetchEncryptedToken rejects with the raw Response.
 const rejectWithResponse = (status: number, body: string) =>
   mockFetchEncryptedToken.mockRejectedValue({ status, text: async () => body } as Response);
 

src/Platform/Hosted/Helpers/ConnectionStringParser.ts

@@ -8,9 +8,7 @@ const DnsPort = "443";
 const isPpeZone = (zone: string): boolean => zone === PpeDnsSuffix || zone.endsWith(`.${PpeDnsSuffix}`);
 
 // Picks the DNS zone matching the kind of account the connection string came from, since a PPE
-// account's endpoints sit under PPE zones and every other account's do not. Returns undefined when the
-// config carries no zone of that kind, so the caller can reject the connection string rather than build
-// an endpoint the account does not own and send the account key there.
+// account's endpoints sit under PPE zones and every other account's do not.
 export const selectEndpointZone = (zones: ReadonlyArray<string>, isPpeAccount: boolean): string | undefined =>
   zones.find((zone) => isPpeZone(zone) === isPpeAccount);
 

src/setupTests.ts

@@ -6,6 +6,9 @@ import enableHooks from "jest-react-hooks-shallow";
 import { TextDecoder, TextEncoder } from "util";
 import i18n from "./i18n";
 import enResources from "./Localization/en/Resources.json";
+
+jest.mock("web-vitals");
+
 configure({ adapter: new Adapter() });
 initializeIcons();