public void WhenGenerateLetterCalled_ThenCreateDocument()
{
var letterGenerator = new LetterGenerator(config.Object, aspose.Object);
var voucher = TestData_VoucherInfo();
const string testBranch = "Test";
var pdf = letterGenerator.GeneratePdfFromTemplate(voucher, testBranch);
Assert.IsInstanceOfType(pdf, typeof(Document));
aspose.Verify(x => x.GetPdfFormTemplate(It.IsAny<string>()), Times.Once);
aspose.Verify(x => x.FillAndFlattenField(It.IsAny<Aspose.Pdf.Facades.Form>(), It.IsAny<string>(), It.IsAny<string>()), Times.AtLeastOnce);
aspose.Verify(x => x.FillField(It.IsAny<Aspose.Pdf.Facades.Form>(), It.IsAny<string>(), It.IsAny<string>()), Times.AtLeastOnce);
}
