public void FiniteYielderExtensionTake()
{
var yielder = Yielder.NaturalNumber().Skip(1).Map(v => v * v).Take(6);
var taken = yielder.Take(5);
Assert.Equal(1, taken.Next());
Assert.Equal(4, taken.Next());
Assert.Equal(9, taken.Next());
Assert.Equal(16, taken.Next());
Assert.True(taken.HasNext());
Assert.Equal(25, taken.Next());
Assert.False(taken.HasNext());
Assert.False(taken.HasNext());
yielder = Yielder.NaturalNumber().Skip(1).Map(v => v * v).Take(6);
taken = yielder.Take(7);
Assert.Equal(1, taken.Next());
Assert.Equal(4, taken.Next());
Assert.Equal(9, taken.Next());
Assert.Equal(16, taken.Next());
Assert.Equal(25, taken.Next());
Assert.True(taken.HasNext());
Assert.Equal(36, taken.Next());
Assert.False(taken.HasNext());
Assert.False(taken.HasNext());
}
public void YielderExtensionFilterAndMap()
{
var yielder = Yielder.NaturalNumber().Map(v => v * 2 + 3);
var selected = yielder.Filter(v => v % 3 < 2).Map(v => v + 4);
Assert.Equal(7, selected.Next());
Assert.Equal(11, selected.Next());
Assert.Equal(13, selected.Next());
Assert.Equal(17, selected.Next());
}
public void YielderExtensionMap()
{
var yielder = Yielder.NaturalNumber().Map(v => v * 2 + 3);
var mapped = yielder.Map(v => v % 3);
Assert.Equal(0, mapped.Next());
Assert.Equal(2, mapped.Next());
Assert.Equal(1, mapped.Next());
Assert.Equal(0, mapped.Next());
}
public void YielderExtensionSkip()
{
var yielder = Yielder.NaturalNumber().Skip(1).Map(v => v * v);
var skipped = yielder.Skip(5);
Assert.Equal(36, skipped.Next());
Assert.Equal(49, skipped.Next());
Assert.Equal(64, skipped.Next());
Assert.Equal(81, skipped.Next());
Assert.Equal(100, skipped.Next());
}
public void YielderExtensionTakeWhile()
{
var yielder = Yielder.NaturalNumber().Skip(1).Map(v => v * v);
var taken = yielder.TakeWhile(v => v < 25);
Assert.Equal(1, taken.Next());
Assert.Equal(4, taken.Next());
Assert.Equal(9, taken.Next());
Assert.Equal(16, taken.Next());
Assert.False(taken.HasNext());
}
public void FiniteYielderExtensionFilterAndMap()
{
var yielder = Yielder.NaturalNumber().Map(v => v * 2 + 3).Take(4);
var selected = yielder.Filter(v => v % 3 < 2).Map(v => v + 4);
Assert.Equal(7, selected.Next());
Assert.Equal(11, selected.Next());
Assert.True(selected.HasNext());
Assert.Equal(13, selected.Next());
Assert.False(selected.HasNext());
Assert.False(selected.HasNext());
}
public void FiniteYielderExtensionMap()
{
var yielder = Yielder.NaturalNumber().Map(v => v * 2 + 1).Take(4);
var mapped = yielder.Map(v => v % 3);
Assert.Equal(1, mapped.Next());
Assert.Equal(0, mapped.Next());
Assert.Equal(2, mapped.Next());
Assert.True(mapped.HasNext());
Assert.Equal(1, mapped.Next());
Assert.False(mapped.HasNext());
Assert.False(mapped.HasNext());
}
public void FiniteYielderExtensionSkip()
{
var yielder = Yielder.NaturalNumber().Skip(1).Map(v => v * v).Take(10);
var skipped = yielder.Skip(5);
Assert.Equal(36, skipped.Next());
Assert.Equal(49, skipped.Next());
Assert.Equal(64, skipped.Next());
Assert.Equal(81, skipped.Next());
Assert.True(skipped.HasNext());
Assert.Equal(100, skipped.Next());
Assert.False(skipped.HasNext());
Assert.False(skipped.HasNext());
yielder = Yielder.NaturalNumber().Skip(1).Map(v => v * v).Take(10);
skipped = yielder.Skip(12);
Assert.False(skipped.HasNext());
Assert.False(skipped.HasNext());
}
public void YielderExtensionZip()
{
var yielderA = Yielder.NaturalNumber().Filter(x => x % 2 == 0);
var yielderB = Yielder.NaturalNumber().Filter(x => x % 2 != 0);
var zipped = yielderA.Zip(yielderB, (a, b) => a + b);
Assert.Equal(1, zipped.Next());
Assert.Equal(5, zipped.Next());
Assert.Equal(9, zipped.Next());
Assert.Equal(13, zipped.Next());
zipped = yielderA.Zip(yielderB, (a, b) => a - b);
Assert.Equal(-1, zipped.Next());
Assert.Equal(-1, zipped.Next());
Assert.Equal(-1, zipped.Next());
Assert.Equal(-1, zipped.Next());
}
public void FiniteYielderExtensionContains()
{
Assert.True(Yielder.NaturalNumber().Map(v => v * 2 + 3).Take(4).Contains(7));
Assert.False(Yielder.NaturalNumber().Map(v => v * 2 + 3).Take(4).Contains(11));
}
public void FiniteYielderExtensionCount()
{
Assert.Equal(3, Yielder.NaturalNumber().Map(v => v * 2 + 3).Take(4).Filter(v => v % 3 < 2).Count());
}
public void FiniteYielderExtensionAny()
{
Assert.False(Yielder.NaturalNumber().Map(v => v * 2 + 1).Take(2).Any(v => v % 3 == 2));
Assert.True(Yielder.NaturalNumber().Map(v => v * 2 + 1).Take(3).Any(v => v % 3 == 2));
}
