public void FormatOutput_Verify()
{
var settingWrong1 = new FormatOutput(string.Empty);
var settingWrong2 = new FormatOutput(" ");
var setting = new FormatOutput("mp4");
Assert.Throws <InvalidOperationException>(() => { var s = settingWrong1.GetAndValidateString(); });
Assert.Throws <InvalidOperationException>(() => { var s = settingWrong2.GetAndValidateString(); });
Assert.DoesNotThrow(() => { var s = setting.GetAndValidateString(); });
Assert.Equal(setting.GetAndValidateString(), "-f mp4");
}
