public void Iterators_Empty_ReturnsNoRows()
{
using (var iterator = new EmptyIterator())
{
AssertEmpty(iterator);
}
}
public void CanDisjunctionIterator()
{
var l1 = new[] { 1, 2, 3, 4, 5, 6, 7 };
var l2 = new[] { 1, 3, 5, 7, 9 };
var l3 = new[] { 3, 4, 5 };
var r1 = new DisjunctionIterator().GetAll().ToList();
Assert.True(Enumerable.Empty <int>().SequenceEqual(r1));
var p1 = new ListIterator(l1);
var r2 = new DisjunctionIterator(p1).GetAll().ToList();
Assert.True(l1.SequenceEqual(r2));
var p2 = new ListIterator(l2, "P2");
var p3 = new ListIterator(l3, "P3");
var r3 = new DisjunctionIterator(p2, p3).GetAll().ToList();
Assert.True(new[] { 1, 3, 4, 5, 7, 9 }.SequenceEqual(r3));
p1 = new ListIterator(l1, "P1");
p2 = new ListIterator(l2, "P2");
p3 = new ListIterator(l3, "P3");
var r4 = new DisjunctionIterator(p1, p2, p3).GetAll().ToList();
Assert.True(new[] { 1, 2, 3, 4, 5, 6, 7, 9 }.SequenceEqual(r4));
p1 = new ListIterator(l1);
var empty = new EmptyIterator();
var r5 = new DisjunctionIterator(p1, empty).GetAll().ToList();
Assert.True(l1.SequenceEqual(r5));
}
public void CanConjunctionIterator()
{
var l1 = new[] { 1, 2, 3, 4, 5, 6, 7 };
var l2 = new[] { 1, 3, 5, 7, 9 };
var l3 = new[] { 3, 4, 5 };
// ReSharper disable ObjectCreationAsStatement
Assert.Throws <ArgumentException>(() => new ConjunctionIterator());
Assert.Throws <ArgumentNullException>(() => new ConjunctionIterator(null));
// ReSharper restore ObjectCreationAsStatement
var r1 = new ConjunctionIterator(new ListIterator(l1)).GetAll();
Assert.True(l1.SequenceEqual(r1));
var p1 = new ListIterator(l1, "P1");
var p2 = new ListIterator(l2, "P2");
var p3 = new ListIterator(l3, "P3");
var r2 = new ConjunctionIterator(p3, p1, p2).GetAll().ToList();
Assert.True(new[] { 3, 5 }.SequenceEqual(r2));
p1 = new ListIterator(l1);
p2 = new ListIterator(l2);
var empty = new EmptyIterator();
var r3 = new ConjunctionIterator(p1, p2, empty).GetAll().ToList();
Assert.Empty(r3);
}
public void CanButNotIterator()
{
var l1 = new[] { 1, 2, 3, 4, 5, 6, 7 };
var l2 = new[] { 1, 3, 5, 7, 9 };
var p1 = new ListIterator(l1);
var p2 = new ListIterator(l2);
var r1 = new ButNotIterator(p1, p2).GetAll().ToList();
Assert.True(new[] { 2, 4, 6 }.SequenceEqual(r1));
p1 = new ListIterator(l1, "P1");
p2 = new ListIterator(l2, "P2");
var r2 = new ButNotIterator(p2, p1).GetAll().ToList();
Assert.True(new[] { 9 }.SequenceEqual(r2));
p1 = new ListIterator(l1);
var r3 = new ButNotIterator(p1, null).GetAll().ToList();
Assert.True(l1.SequenceEqual(r3));
p2 = new ListIterator(l2);
var r4 = new ButNotIterator(null, p2).GetAll().ToList();
Assert.Empty(r4);
var r5 = new ButNotIterator(null, null).GetAll().ToList();
Assert.Empty(r5);
p1 = new ListIterator(l1);
var empty = new EmptyIterator();
var r6 = new ButNotIterator(p1, empty).GetAll().ToList();
Assert.True(l1.SequenceEqual(r6));
empty = new EmptyIterator();
p2 = new ListIterator(l2);
var r7 = new ButNotIterator(empty, p2).GetAll().ToList();
Assert.Empty(r7);
}
