public void Negate_WithNagatableAmount_ShouldReturnNagatedValue(long value, long expected)
{
// Arrange.
var amount = new TokenAmount(value);
// Act.
var negated = TokenAmount.Negate(amount);
// Assert.
Assert.Equal(new TokenAmount(expected), negated);
}
public void Negate_WithMinValue_ShouldThrow()
{
var v = new TokenAmount(long.MinValue);
Assert.Throws <OverflowException>(() => TokenAmount.Negate(v));
}