public void SubstitutesCompareDefaultForNull()
{
IEqualityComparer <int> source = null;
var comparer = source.EquateSequence();
Assert.AreSame(EqualityCompare <int> .Default(), (comparer as SequenceEqualityComparer <int>).Source);
}
public void SubstitutesCompareDefaultForNull()
{
IEqualityComparer <int> source = null;
var comparer = source.EquateSequence();
Assert.Equal(EqualityComparerBuilder.For <int>().Default().EquateSequence().ToString(), comparer.ToString());
}
/// <summary>
/// Returns an equality comparer that will perform a lexicographical equality on a sequence of items.
/// This is the same as calling <see cref="EquateSequence{T}(System.Collections.Generic.IEqualityComparer{T}?,bool)"/> with <c>ignoreOrder</c> set to <c>false</c>.
/// </summary>
/// <typeparam name="T">The type of sequence elements being compared.</typeparam>
/// <param name="source">The source comparer. If this is <c>null</c>, the default comparer is used.</param>
/// <returns>A comparer that will perform a lexicographical equality on a sequence of items.</returns>
public static IFullEqualityComparer <IEnumerable <T> > EquateSequence <T>(this IEqualityComparer <T>?source) => source.EquateSequence(ignoreOrder: false);