public async Task CheckExistenceReturnsCorrectValue()
{
string groupName = Recording.GenerateAssetName("csmrg");;
var checkExistenceFirst = await ResourceGroupsOperations.CheckExistenceAsync(groupName);
Assert.AreEqual(404, checkExistenceFirst.Status);
await ResourceGroupsOperations.CreateOrUpdateAsync(groupName, new ResourceGroup(DefaultLocation));
var checkExistenceSecond = await ResourceGroupsOperations.CheckExistenceAsync(groupName);
Assert.AreEqual(204, checkExistenceSecond.Status);
}