public void OAuth2Token_SetBySetOAuth2Token_Null()
        {
            var oAuth2Token = new MockOAuth2Token().GetOAuth2Token();
            var client = new MockApiClient("ClientId", "ClientSecret");

            Assert.Null(client.OAuth2Token);
            client.SetOAuth2Token(oAuth2Token);
            Assert.Same(oAuth2Token, client.OAuth2Token);
            client.SetOAuth2Token(null);
            Assert.Null(client.OAuth2Token);
        }