/// <inheritdoc cref="ContainFiles(Should, IEnumerable{string})"/>
 public static DirectorySubject ContainFiles(this Should should, params string[] fileNames) =>
 should.ContainFiles(fileNames.AsEnumerable());
 /// <summary>
 /// Verifies that directory contains a file with the specified name.
 /// </summary>
 /// <param name="should">The should instance.</param>
 /// <param name="fileName">The file name.</param>
 /// <returns>The owner instance.</returns>
 public static DirectorySubject ContainFile(this Should should, string fileName) =>
 should.ContainFiles(fileName);