public static void RemoveHeadElements()
{
using var writer = new PooledArrayBufferWriter <string>();
writer.Add("a");
writer.Add("b");
writer.Add("c");
writer.RemoveFirst(2);
Equal(1, writer.WrittenCount);
Equal("c", writer[0]);
writer.RemoveFirst(1);
Equal(0, writer.WrittenCount);
Throws <ArgumentOutOfRangeException>(() => writer.RemoveFirst(-1));
}
public static void WriterAsReadOnlyCollection()
{
using var writer = new PooledArrayBufferWriter <int>();
IReadOnlyList <int> collection = writer;
Empty(collection);
writer.Add(42);
Equal(1, writer.WrittenCount);
Equal(1, collection.Count);
Equal(42, collection[0]);
Throws <IndexOutOfRangeException>(() => collection[1]);
Equal(42, Enumerable.First(collection));
Equal(1, Enumerable.Count(collection));
writer.AddAll(new[] { 43, 44 });
Equal(3, writer.WrittenCount);
Equal(3, collection.Count);
Equal(42, collection[0]);
Equal(43, collection[1]);
Equal(44, collection[2]);
Throws <IndexOutOfRangeException>(() => collection[3]);
Equal(3, Enumerable.Count(collection));
Equal(new[] { 42, 43, 44 }, Enumerable.ToArray(collection));
}