public void CompositeEnumerator_SourceChanged()
{
// Verify that InvalidOperationExceptions are thrown when the when
// performing operations on the enumerator after the source has
// signalled that it has been modified.
List <int> source = new List <int>();
CompositeEnumerator <int> enumerator;
source.Add(0);
source.Add(1);
source.Add(2);
enumerator = new CompositeEnumerator <int>(source.GetEnumerator());
enumerator.OnSourceChanged();
ExtendedAssert.Throws <InvalidOperationException>(() => enumerator.MoveNext());
enumerator = new CompositeEnumerator <int>(source.GetEnumerator());
enumerator.OnSourceChanged();
ExtendedAssert.Throws <InvalidOperationException>(() => { int i = enumerator.Current; });
enumerator = new CompositeEnumerator <int>(source.GetEnumerator());
enumerator.OnSourceChanged();
ExtendedAssert.Throws <InvalidOperationException>(() => { enumerator.Reset(); });
}
public void CompositeEnumerator_Reset()
{
List <int> source1 = new List <int>();
List <int> source2 = new List <int>();
List <int> source3 = new List <int>();
List <int> output = new List <int>();
CompositeEnumerator <int> enumerator;
source1.Add(0);
source1.Add(1);
source1.Add(2);
source2.Add(3);
source2.Add(4);
source2.Add(5);
source3.Add(6);
source3.Add(7);
source3.Add(8);
enumerator = new CompositeEnumerator <int>(source1.GetEnumerator(), source2.GetEnumerator(), source3.GetEnumerator());
while (enumerator.MoveNext())
{
output.Add(enumerator.Current);
}
Assert.AreEqual(9, output.Count);
Assert.AreEqual(0, output[0]);
Assert.AreEqual(1, output[1]);
Assert.AreEqual(2, output[2]);
Assert.AreEqual(3, output[3]);
Assert.AreEqual(4, output[4]);
Assert.AreEqual(5, output[5]);
Assert.AreEqual(6, output[6]);
Assert.AreEqual(7, output[7]);
Assert.AreEqual(8, output[8]);
// Verify that we can reset the enumerator and rewalk the collections.
output.Clear();
enumerator.Reset();
while (enumerator.MoveNext())
{
output.Add(enumerator.Current);
}
Assert.AreEqual(9, output.Count);
Assert.AreEqual(0, output[0]);
Assert.AreEqual(1, output[1]);
Assert.AreEqual(2, output[2]);
Assert.AreEqual(3, output[3]);
Assert.AreEqual(4, output[4]);
Assert.AreEqual(5, output[5]);
Assert.AreEqual(6, output[6]);
Assert.AreEqual(7, output[7]);
Assert.AreEqual(8, output[8]);
}
public static void Main()
{
CompositeEnumerator e = (CompositeEnumerator)ShellProcess.Make().GetEnumerator();
while (e.MoveNext())
{
for (int i = 0; i < e.Depth(); i++)
{
Console.Write(" ");
}
Console.WriteLine(e.Current);
}
}
public void TestArrays()
{
int[] a0 = { 0 };
int[] a1 = { 1, 2, 3 };
int[] a2 = { 4, 5, 6 };
CompositeEnumerator e = new CompositeEnumerator(a0, a1, a2);
for (int i = 0; i < 7; ++i)
{
Assert(e.MoveNext());
AssertEquals(i, e.Current);
}
Assert(!e.MoveNext());
}
public void CompositeEnumerator_SingleEnumerator()
{
List <int> source = new List <int>();
List <int> output = new List <int>();
CompositeEnumerator <int> enumerator;
source.Add(0);
source.Add(1);
source.Add(2);
enumerator = new CompositeEnumerator <int>(source.GetEnumerator());
while (enumerator.MoveNext())
{
output.Add(enumerator.Current);
}
Assert.AreEqual(3, output.Count);
Assert.AreEqual(0, output[0]);
Assert.AreEqual(1, output[1]);
Assert.AreEqual(2, output[2]);
}
public void CompositeEnumerator_MultipleEnumerators()
{
List <int> source1 = new List <int>();
List <int> source2 = new List <int>();
List <int> source3 = new List <int>();
List <int> output = new List <int>();
CompositeEnumerator <int> enumerator;
source1.Add(0);
source1.Add(1);
source1.Add(2);
source2.Add(3);
source2.Add(4);
source2.Add(5);
source3.Add(6);
source3.Add(7);
source3.Add(8);
enumerator = new CompositeEnumerator <int>(source1.GetEnumerator(), source2.GetEnumerator(), source3.GetEnumerator());
while (enumerator.MoveNext())
{
output.Add(enumerator.Current);
}
Assert.AreEqual(9, output.Count);
Assert.AreEqual(0, output[0]);
Assert.AreEqual(1, output[1]);
Assert.AreEqual(2, output[2]);
Assert.AreEqual(3, output[3]);
Assert.AreEqual(4, output[4]);
Assert.AreEqual(5, output[5]);
Assert.AreEqual(6, output[6]);
Assert.AreEqual(7, output[7]);
Assert.AreEqual(8, output[8]);
}
public void CompositeEnumerator_EmptyEnumerators()
{
List <int> source1 = new List <int>();
List <int> source2 = new List <int>();
List <int> source3 = new List <int>();
List <int> output = new List <int>();
CompositeEnumerator <int> enumerator;
// Empty enumerator at beginning
source1.Clear();
source2.Clear();
source3.Clear();
output.Clear();
source2.Add(3);
source2.Add(4);
source2.Add(5);
source3.Add(6);
source3.Add(7);
source3.Add(8);
enumerator = new CompositeEnumerator <int>(source1.GetEnumerator(), source2.GetEnumerator(), source3.GetEnumerator());
while (enumerator.MoveNext())
{
output.Add(enumerator.Current);
}
Assert.AreEqual(6, output.Count);
Assert.AreEqual(3, output[0]);
Assert.AreEqual(4, output[1]);
Assert.AreEqual(5, output[2]);
Assert.AreEqual(6, output[3]);
Assert.AreEqual(7, output[4]);
Assert.AreEqual(8, output[5]);
// Empty enumerator in middle
source1.Clear();
source2.Clear();
source3.Clear();
output.Clear();
source1.Add(0);
source1.Add(1);
source1.Add(2);
source3.Add(6);
source3.Add(7);
source3.Add(8);
enumerator = new CompositeEnumerator <int>(source1.GetEnumerator(), source2.GetEnumerator(), source3.GetEnumerator());
while (enumerator.MoveNext())
{
output.Add(enumerator.Current);
}
Assert.AreEqual(6, output.Count);
Assert.AreEqual(0, output[0]);
Assert.AreEqual(1, output[1]);
Assert.AreEqual(2, output[2]);
Assert.AreEqual(6, output[3]);
Assert.AreEqual(7, output[4]);
Assert.AreEqual(8, output[5]);
// Empty enumerator at end
source1.Clear();
source2.Clear();
source3.Clear();
output.Clear();
source1.Add(0);
source1.Add(1);
source1.Add(2);
source2.Add(3);
source2.Add(4);
source2.Add(5);
enumerator = new CompositeEnumerator <int>(source1.GetEnumerator(), source2.GetEnumerator(), source3.GetEnumerator());
while (enumerator.MoveNext())
{
output.Add(enumerator.Current);
}
Assert.AreEqual(6, output.Count);
Assert.AreEqual(0, output[0]);
Assert.AreEqual(1, output[1]);
Assert.AreEqual(2, output[2]);
Assert.AreEqual(3, output[3]);
Assert.AreEqual(4, output[4]);
Assert.AreEqual(5, output[5]);
}
