tests: "rejected promise … waiting for browser login"

Problem:

    rejected promise not handled within 1 second: Error: Timed-out waiting for browser login flow to complete
        at poll (…/src/auth/sso/ssoAccessTokenProvider.ts:251:15)
        at async SsoAccessTokenProvider.authorize (…/src/auth/sso/ssoAccessTokenProvider.ts:188:23)
        at async SsoAccessTokenProvider.runFlow (…/src/auth/sso/ssoAccessTokenProvider.ts:113:20)
        at async SsoAccessTokenProvider.createToken (…/src/auth/sso/ssoAccessTokenProvider.ts:102:24)

Solution:
Don't know how to fix this. The chain of calls appears correctly
await'd. And the ToolkitError correctly "bubbles up" when testing that
codepath interactively.

Author: justinmk3

src/test/credentials/sso/ssoAccessTokenProvider.test.ts

@@ -237,6 +237,13 @@ describe('SsoAccessTokenProvider', function () {
         })
 
         it('respects the device authorization expiration time', async function () {
+            // XXX: Don't know how to fix this "unhandled rejection" caused by this test:
+            //      rejected promise not handled within 1 second: Error: Timed-out waiting for browser login flow to complete
+            //          at poll (…/src/auth/sso/ssoAccessTokenProvider.ts:251:15)
+            //          at async SsoAccessTokenProvider.authorize (…/src/auth/sso/ssoAccessTokenProvider.ts:188:23)
+            //          at async SsoAccessTokenProvider.runFlow (…/src/auth/sso/ssoAccessTokenProvider.ts:113:20)
+            //          at async SsoAccessTokenProvider.createToken (…/src/auth/sso/ssoAccessTokenProvider.ts:102:24)
+
             setupFlow()
             stubOpen()
             const exception = new AuthorizationPendingException({ message: '', $metadata: {} })