public void CheckIfOnlyOccursOnes()
{
bool foundError = false;
var fileExtensions = DefaultFileExtensions.GetDefault();
foreach (var fileExtension in fileExtensions)
{
foreach (var item in fileExtensions)
{
if (fileExtension.Extension == item.Extension && item != fileExtension)
{
foundError = true;
Console.WriteLine($"{item.Extension} occures at least twice");
}
}
}
Assert.IsFalse(foundError);
}
