I still truly believe that Amarin already did this quietly. There's no way they didn't test/analyze them.
And based on the fact that they have said absolutely nothing about generic bio-equivalency, and refuse to even answer question about it, leads me to believe that they know the answer, but don't want it to become known. They would rather people like us continue to question the generics, rather than come out and say "yeah, we had them tested, and the ingredients would pass the FDA sniff-test".