public void ParseContentTypeFailsForInvalidString(string contentType)
 {
     Assert.Throws <ArgumentException>(() => NotificationHubClient.ParseContentType(contentType, out _, out _));
 }
 public void ParseContentTypeSuccessForValidString(string contentType)
 {
     NotificationHubClient.ParseContentType(contentType, out var mediaType, out var encoding);
     Assert.NotEmpty(mediaType);
     Assert.NotNull(encoding);
 }