public async Task GetTaxAsync_Should_Calculate_The_Correct_Tax_Percentage()
{
// arrange
var taxes = new List <Tax> {
new Tax {
TaxCode = "VAT", TaxName = "Value Added Tax", Percentage = 5.5m
}
};
_mockTaxRepository.GetLocalTaxesAsync("US").Returns(Task.FromResult(taxes));
// act
var result = await _service.GetTaxAsync("US", 350, _cxlToken);
// assert
Assert.Multiple(() =>
{
Assert.AreEqual(1, result.Count);
Assert.AreEqual(19.25, result.First().Amount);
});
}
public async Task <List <TaxDto> > GetTaxAsync(string countryCode, decimal transferAmount, CancellationToken cxlToken)
{
if (string.IsNullOrEmpty(countryCode))
{
throw new ArgumentNullException("countryCode");
}
if (transferAmount <= 0)
{
throw new ArgumentException("Amount must be greater than 0");
}
var taxes = (await _taxRepository.GetLocalTaxesAsync(countryCode))
?? new List <Data.Model.Tax>();
return(taxes
.Select(t => new TaxDto
{
TaxCode = t.TaxCode,
TaxName = t.TaxName,
Amount = transferAmount * t.Percentage * 0.01m
}).ToList());
}