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using Xunit;
public class QuantitySpec
{
[Fact]
public void it_is_equal()
{
Assert.Equal(new Quantity(100, Currency.CAD), new Quantity(100, Currency.CAD));
}
[Fact]
public void it_is_not_equal()
{
Assert.NotEqual(new Quantity(100, Currency.CAD), new Quantity(200, Currency.CAD));
}
[Fact]
public void it_is_not_an_equal_when_different_currencies()
{
Assert.NotEqual(new Quantity(100, Currency.CAD), new Quantity(100, Currency.USD));
}
[Fact]
public void it_converts_USD_to_CAD()
{
var result = new Quantity(0.50M, Currency.USD).convert_to(Currency.CAD);
Assert.Equal(new Quantity(1.0M, Currency.CAD), result);
}
[Fact]
public void it_converts_MXN_to_CAD()
{
var result = new Quantity(10, Currency.MXN).convert_to(Currency.CAD);
Assert.Equal(new Quantity(1.0M, Currency.CAD), result);
}
[Fact]
public void it_adds_two_quantities()
{
var result = new Quantity(100, Currency.CAD).plus(new Quantity(100, Currency.CAD));
Assert.Equal(new Quantity(200, Currency.CAD), result);
}
[Fact]
public void it_adds_CAD_and_USD()
{
var result = new Quantity(100, Currency.CAD).plus(new Quantity(50, Currency.USD));
Assert.Equal(new Quantity(200, Currency.CAD), result);
}
[Fact]
public void it_subtracts_quantities()
{
var result = new Quantity(100, Currency.CAD).subtract(new Quantity(50, Currency.CAD));
Assert.Equal(new Quantity(50, Currency.CAD), result);
}
[Fact]
public void it_subtracts_CAD_and_USD()
{
var result = new Quantity(100, Currency.CAD).subtract(new Quantity(25, Currency.USD));
Assert.Equal(new Quantity(50, Currency.CAD), result);
}
}
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