public void EmptyValidationTextIsSingleEmpty()
{
ValidationText vt = ValidationText.Empty;
Assert.Equal(1, vt.Count);
// Calling Count() checks the enumeration returns no results, unlike the Count property.
#pragma warning disable CA1829 // Use Length/Count property instead of Count() when available
Assert.Equal(1, vt.Count());
#pragma warning restore CA1829 // Use Length/Count property instead of Count() when available
Assert.Same(string.Empty, vt.Single());
Assert.Equal(string.Empty, vt.ToSingleLine());
}