Goodwill forms part of the carrying amount of an investment in an associate and is not separately recognised.
Therefore it is not tested for impairment separately.
Instead, the entire carrying amount of the investment is tested for impairment as a single asset,
whenever application of the requirements in IAS 39 indicates that the investment may be impaired.
The impairment test itself shall be carried out in accordance with IAS 36.
Any reversal of that impairment loss is recognised to the extent that the recoverable amount of the investment subsequently increases.