t.Error("got all zeros for nonce")
			}
		})
	})
}

func testGCMNonce(t *testing.T, f transformerFunc, infoLen int, check func(int, []byte)) {
	key := []byte("abcdefghijklmnopabcdefghijklmnop")
	block, err := aes.NewCipher(key)
	if err != nil {
		t.Fatal(err)
	}
	transformer := f(t, block, key)

	ctx := context.Background()
	dataCtx := value.DefaultContext("authenticated_data")