public static void SingleOrDefault(Labeled <ParallelQuery <int> > labeled, int count, int element)
{
ParallelQuery <int> query = labeled.Item;
Assert.Equal(count >= 1 ? element : default(int), query.SingleOrDefault());
Assert.Equal(count >= 1 ? element : default(int), query.SingleOrDefault(x => true));
}
public static void SingleOrDefault_NoMatch(Labeled <ParallelQuery <int> > labeled, int count, int element)
{
ParallelQuery <int> query = labeled.Item;
IntegerRangeSet seen = new IntegerRangeSet(0, count);
Assert.Equal(default(int), query.SingleOrDefault(x => !seen.Add(x)));
seen.AssertComplete();
}
public static void SingleOrDefault_AllMatch(Labeled <ParallelQuery <int> > labeled, int count, int element)
{
ParallelQuery <int> query = labeled.Item;
Assert.Throws <InvalidOperationException>(() => query.SingleOrDefault(x => true));
}