public void TestPatchDnsSuffixNegative()
{
Assert.Throws <ArgumentOutOfRangeException>(() => EnvironmentExtensions.PatchDnsSuffix(null, null));
Assert.Throws <ArgumentOutOfRangeException>(() => EnvironmentExtensions.PatchDnsSuffix(new Uri("/", UriKind.Relative), " "));
Assert.Throws <ArgumentOutOfRangeException>(() => new Uri("https://manage.windowsazure.com/subscriptions").PatchDnsSuffix(" "));
}