native: fix formulae of unclaimed GAS calculation in test

The behaviour is the same, the result is also the same, but the meaning
is fixed.

Signed-off-by: Anna Shaleva <shaleva.ann@nspcc.ru>

pkg/core/native/native_test/neo_test.go

@@ -743,13 +743,15 @@ func TestNEO_CalculateBonus(t *testing.T) {
 
 	t.Run("Many blocks", func(t *testing.T) {
 		amount := 100
-		defaultGASParBlock := 5
+		defaultGASPerBlock := 5
 		newGASPerBlock := 1
+		neoHolderRewardRatio := 10
 
 		initialGASBalance := e.Chain.GetUtilityTokenBalance(accH)
 
 		// Five blocks of NEO owning with default GasPerBlockValue.
 		neoValidatorsInvoker.Invoke(t, true, "transfer", e.Validator.ScriptHash(), accH, amount, nil)
+
 		for range rewardDistance/2 - 2 {
 			e.AddNewBlock(t)
 		}
@@ -764,8 +766,12 @@ func TestNEO_CalculateBonus(t *testing.T) {
 		h := acc.Invoke(t, true, "transfer", accH, accH, amount, nil)
 		claimTx, _ := e.GetTransaction(t, h)
 
-		firstPart := int64(amount*rewardDistance/2*defaultGASParBlock) / int64(rewardDistance)
-		secondPart := int64(amount*rewardDistance/2*newGASPerBlock) / int64(rewardDistance)
+		firstPart := int64(amount * neoHolderRewardRatio / 100 * // reward for a part of the whole NEO total supply that is owned by acc
+			defaultGASPerBlock * // GAS generated by a single block
+			rewardDistance / 2) // number of blocks generated with specified GasPerBlock
+		secondPart := int64(amount * neoHolderRewardRatio / 100 * // reward for a part of the whole NEO total supply that is owned by acc
+			newGASPerBlock * // GAS generated by a single block after GasPerBlock update
+			rewardDistance / 2) // number of blocks generated with specified GasPerBlock
 		e.CheckGASBalance(t, accH, big.NewInt(initialGASBalance.Int64()-
 			claimTx.SystemFee-claimTx.NetworkFee + +firstPart + secondPart))
 	})