public void ExecForKey()
{
const string command_line = "file1.bin file2.bin -wps \"c:\\Program files 321\\123\" 123 "
+ "--in file3.txt file4.txt file5.txt --in file6.txt -o result.bin "
+ "-- file7.qwe file8.asd";
var parser = new CommandLineArgs(command_line.Split(' '));
var values_ = new List <string>();
var values_w = new List <string>();
var values_p = new List <string>();
var values_s = new List <string>();
var values_in = new List <string>();
var values_o = new List <string>();
var values__ = new List <string>();
var values_tst = new List <string>();
bool Check(string key, List <string> values) => parser.ExecForKey(key, values.Add);
Assert.That.Value(Check("", values_)).IsTrue().And.Collection(values_).IsEqualTo(new[] { "file1.bin", "file2.bin" });
Assert.That.Value(Check("w", values_w)).IsTrue().And.Collection(values_w).IsEqualTo(new[] { "c:\\Program files 321\\123", "123" });
Assert.That.Value(Check("p", values_p)).IsTrue().And.Collection(values_p).IsEqualTo(new[] { "c:\\Program files 321\\123", "123" });
Assert.That.Value(Check("s", values_s)).IsTrue().And.Collection(values_s).IsEqualTo(new[] { "c:\\Program files 321\\123", "123" });
Assert.That.Value(Check("in", values_in)).IsTrue().And.Collection(values_in).IsEqualTo(new[] { "file3.txt", "file4.txt", "file5.txt", "file6.txt" });
Assert.That.Value(Check("o", values_o)).IsTrue().And.Collection(values_o).IsEqualTo(new[] { "result.bin" });
Assert.That.Value(Check("--", values__)).IsTrue().And.Collection(values__).IsEqualTo(new[] { "file7.qwe", "file8.asd" });
Assert.That.Value(Check("tst", values_tst)).IsFalse().And.Collection(values_tst).IsEmpty();
}