[TestClass]
public class ValidSignClientTest
{
	private ValidSignSettings _settings;
	private ISigningProviderAccount _account;

	private OssClient _validSignClient;
	private OssClient ValidSignClient => _validSignClient ??= new OssClient(_account.GetApiKey(), _settings.Url);

	private DocumentPackage createPackageThatHasAttachmentRequirement()
	{
		// Create a package to create a template
		var templateName = $"AttachmentRequirement Unittest ({DateTime.Now})";
		var packageBuilder = PackageBuilder.NewPackageNamed(templateName)
			.DescribedAs("Template with AttachmentRequirement")
			.WithSettings(DocumentPackageSettingsBuilder.NewDocumentPackageSettings());

		// Add a role with an attachment requirement
		var placeHolder = SignerBuilder.NewSignerPlaceholder(new Placeholder("Signer2"));
		var attachmentRequirement = new AttachmentRequirementBuilder("Attachment 1")
			.WithDescription("Please add attachment")
			.IsRequiredAttachment()
			.Build();

		placeHolder.WithAttachmentRequirement(attachmentRequirement);
		packageBuilder.WithSigner(placeHolder);
		return packageBuilder.Build();
	}

	[TestMethod]
	public void GetTemplate_WithAttachmentRequirement_HasData()
	{
		var templateId = string.Empty;

		try
		{
			// Arrange 
			setSigningProvider();
			var package = createPackageThatHasAttachmentRequirement();

			// Act
			templateId = ValidSignClient.CreateTemplate(package).Id;

			// Assert
			var template = ValidSignClient.GetPackage(new PackageId(templateId)) ?? throw new Exception("Package not found");
			Assert.IsTrue(template.Placeholders.SelectMany(x => x.Attachments).Any(), "It should have an attachment requirement");
		}
		finally
		{
			if(!string.IsNullOrEmpty(templateId))
				ValidSignClient.PackageService.DeletePackage(new PackageId(templateId));

			_validSignClient = null;
		}
	}

	[TestMethod, ExpectedException(typeof(NullReferenceException))]
	public void GetTemplates_WithAttachmentRequirement_ThrowsNullReferenceException()
	{
		var templateId = string.Empty;

		// NuGetPackage Version 11.57 .. 11.59

		try
		{
			// Arrange 
			setSigningProvider();
			var package = createPackageThatHasAttachmentRequirement();
			templateId = ValidSignClient.CreateTemplate(package).Id;

			// Act
			var templates = ValidSignClient.PackageService.GetTemplates(new PageRequest(0), Visibility.ACCOUNT);

		}
		finally
		{
			if (!string.IsNullOrEmpty(templateId))
				ValidSignClient.PackageService.DeletePackage(new PackageId(templateId));

			_validSignClient = null;
		}
	}

	private void setSigningProvider()
	{
		// Set _settings & _account
	}
}