/// <summary>
        /// Get exchange service.
        /// </summary>
        /// <returns></returns>
        private ExchangeService GetExchangeService()
        {
            IAuthorizationProvider authProvider = Substitute.For <IAuthorizationProvider>();

            authProvider.GetAuthenticationHeader().ReturnsForAnyArgs(Task.FromResult(new AuthenticationHeaderValue("Bearer", "abcd")));

            ExchangeServiceContext ctx = new ExchangeServiceContext(authProvider);

            return(ctx["*****@*****.**"]);
        }
 public static void Init(TestContext testContext)
 {
     FunctionalTestRunner.exchangeContext = new ExchangeServiceContext(
         new TestAuthenticationProvider(),
         "FunctionalTestCase");
 }