add more tests

Signed-off-by: Neeharika-Sompalli <neeharika.sompalli@swirldslabs.com>

hedera-node/hedera-token-service-impl/src/test/java/com/hedera/node/app/service/token/impl/test/handlers/transfer/customfees/CustomRoyaltyFeeAssessorTest.java

@@ -192,7 +192,7 @@ void doesntFailIfFallbackNftTransferredToUnknownAlias() {
     }
 
     @Test
-    void skipsIfRoyaltyAlreadyPaid() {
+    void skipsIfRoyaltyAlreadyPaidByReceiver() {
         result = new AssessmentResult(List.of(nftTransferListWithAlias), List.of());
         // Include royalty already paid
         result.addToRoyaltiesPaid(Pair.of(funding, firstFungibleTokenId));
@@ -210,6 +210,25 @@ void skipsIfRoyaltyAlreadyPaid() {
         verify(fixedFeeAssessor, never()).assessFixedFee(any(), any(), any(), any());
     }
 
+    @Test
+    void assessRoyaltyOnlyOncePerTokenType() {
+        result = new AssessmentResult(List.of(nftTransferListWithAlias), List.of());
+        // Include royalty already paid by sender
+        result.addToRoyaltiesPaid(Pair.of(payer, firstFungibleTokenId));
+
+        final var royaltyCustomFee = withRoyaltyFee(
+                royaltyFee.copyBuilder().fallbackFee(htsFallbackFee).build(), targetCollector);
+        final var fixedFee = withFixedFee(this.fixedFee, otherCollector);
+
+        final CustomFeeMeta feeMeta = withCustomFeeMeta(List.of(fixedFee, royaltyCustomFee), NON_FUNGIBLE_UNIQUE);
+
+        subject.assessRoyaltyFees(feeMeta, payer, funding, result);
+
+        assertThat(result.getAssessedCustomFees()).isEmpty();
+
+        verify(fixedFeeAssessor, never()).assessFixedFee(any(), any(), any(), any());
+    }
+
     @Test
     void reclaimsFromExchangeValueWhenAvailable() {
         final var accountAmounts = List.of(AccountAmount.newBuilder()