| public static EnumerateElementAtIndex ( IEnumerable enumerable, int index ) : object | ||
| enumerable | IEnumerable |
/// The |
| index | int | /// The index of the element in the enumeration to return. /// |
| return | object | |
public void EnumerateElementAtNegativeIndexViaIEnumerable()
{
string expected = "Mmm...";
IList list = new string[] { "Aw!", "Man!", expected };
Assert.Throws <ArgumentOutOfRangeException>(() => ObjectUtils.EnumerateElementAtIndex(list, -10));
}
public void EnumerateElementAtNegativeIndexViaIEnumerable()
{
string expected = "Mmm...";
IList list = new string[] { "Aw!", "Man!", expected };
object actual = ObjectUtils.EnumerateElementAtIndex(list, -10);
Assert.AreEqual(expected, actual);
}
public void EnumerateElementAtOutOfRangeIndex()
{
string expected = "Mmm...";
IList list = new string[] { "Aw!", "Man!", expected };
IEnumerator enumerator = list.GetEnumerator();
Assert.Throws <ArgumentOutOfRangeException>(() => ObjectUtils.EnumerateElementAtIndex(enumerator, 12));
}
public void EnumerateElementAtNegativeIndex()
{
string expected = "Mmm...";
IList list = new string[] { "Aw!", "Man!", expected };
IEnumerator enumerator = list.GetEnumerator();
object actual = ObjectUtils.EnumerateElementAtIndex(enumerator, -10);
Assert.AreEqual(expected, actual);
}
/// <summary>
/// Returns the element at the specified index using the supplied
/// <paramref name="enumerable"/>.
/// </summary>
/// <param name="enumerable">
/// The <see cref="System.Collections.IEnumerable"/> to use to enumerate
/// elements until the supplied <paramref name="index"/> is reached.
/// </param>
/// <param name="index">
/// The index of the element in the enumeration to return.
/// </param>
/// <returns>
/// The element at the specified index using the supplied
/// <paramref name="enumerable"/>.
/// </returns>
/// <exception cref="System.ArgumentOutOfRangeException">
/// If the supplied <paramref name="index"/> was less than zero, or the
/// supplied <paramref name="enumerable"/> did not contain enough elements
/// to be able to reach the supplied <paramref name="index"/>.
/// </exception>
/// <exception cref="System.ArgumentNullException">
/// If the supplied <paramref name="enumerable"/> is <see langword="null"/>.
/// </exception>
public static object EnumerateElementAtIndex(IEnumerable enumerable, int index)
{
AssertUtils.ArgumentNotNull(enumerable, "enumerable");
return(ObjectUtils.EnumerateElementAtIndex(enumerable.GetEnumerator(), index));
}
/// <summary>
/// Returns the first element in the supplied <paramref name="enumerator"/>.
/// </summary>
/// <param name="enumerator">
/// The <see cref="System.Collections.IEnumerator"/> to use to enumerate
/// elements.
/// </param>
/// <returns>
/// The first element in the supplied <paramref name="enumerator"/>.
/// </returns>
/// <exception cref="System.IndexOutOfRangeException">
/// If the supplied <paramref name="enumerator"/> did not have any elements.
/// </exception>
public static object EnumerateFirstElement(IEnumerator enumerator)
{
return(ObjectUtils.EnumerateElementAtIndex(enumerator, 0));
}
