void Multiply_NullMultiplicands_ReturnsNull()
{
var sut = new sut.Multiplier();
var result = sut.Multiply(null);
Assert.Null(result);
}
void Multiply_EmptyMultiplicands_ReturnsNull()
{
var sut = new sut.Multiplier();
var result = sut.Multiply(new List <int>());
Assert.Null(result);
}
void Multiply_SingleMultiplicand_ReturnsNull()
{
var sut = new sut.Multiplier();
var result = sut.Multiply(new List <int> {
42
});
Assert.Null(result);
}
void Multiply_ValidMultiplicands_ReturnsProduct(
IList <int> multiplicands,
int expectedProduct
)
{
var sut = new sut.Multiplier();
var result = sut.Multiply(multiplicands);
Assert.NotNull(result);
Assert.Equal(expectedProduct, result.Value);
}