public void Iterators_ComputeScalar_ComputesValues()
{
var rows = new object[]
{
4, 6, 8
};
var expected = new object[, ]
{
{ 4, 12 },
{ 6, 18 },
{ 8, 24 }
};
using (var input = new MockedIterator(rows))
{
var values = new IteratorFunction[]
{
() => (int)input.RowBuffer[0] * 3
};
using (var iterator = new ComputeScalarIterator(input, values))
{
AssertProduces(iterator, expected);
}
}
}
public void Iterators_ComputeScalar_ReturnsEmpty_IfInputIsEmpty()
{
var rows = new object[0];
var values = new IteratorFunction[]
{
() => 1
};
using (var input = new MockedIterator(rows))
using (var iterator = new ComputeScalarIterator(input, values))
{
AssertEmpty(iterator);
}
}
public void Iterators_ComputeScalar_ForwardsProperly()
{
var values = Enumerable.Empty <IteratorFunction>();
var rows = new object[] { 1, 2 };
var expected = rows;
using (var input = new MockedIterator(rows))
{
using (var iterator = new ComputeScalarIterator(input, values))
{
for (var i = 0; i < 2; i++)
{
AssertProduces(iterator, expected);
}
}
Assert.Equal(2, input.TotalOpenCount);
Assert.Equal(4, input.TotalReadCount);
Assert.Equal(1, input.DisposalCount);
}
}
