public void TestMimeTypeLookupToGetExtensions()
{
var expected = new[] { KnownMimeTypes.FileExtensions.Json, KnownMimeTypes.FileExtensions.Map, KnownMimeTypes.FileExtensions.Topojson };
var actual = MimeUtility.GetExtensions(KnownMimeTypes.Json);
Assert.IsTrue(actual.All(x => expected.Contains(x)));
var @null = MimeUtility.GetExtensions("invalid");
Assert.IsNull(@null);
}