Reset value to -1 when inner is empty

Author: IoannisPanagiotas

core/src/main/java/org/neo4j/gds/core/huge/NodeFilteredAdjacencyCursor.java

@@ -54,6 +54,7 @@ public int size() {
 
     @Override
     public boolean hasNextVLong() {
+        this.currentLongValue = AdjacencyCursor.NOT_FOUND;
         if (innerCursor.hasNextVLong()) {
             var innerNextLong = innerCursor.peekVLong();
             if (!idMap.containsRootNodeId(innerNextLong)) {

core/src/test/java/org/neo4j/gds/core/huge/NodeFilteredAdjacencyCursorTest.java

@@ -85,6 +85,14 @@ void shouldSkipUntilWithFilter() {
         assertThat(adjacencyCursor.skipUntil(8L)).isEqualTo(AdjacencyCursor.NOT_FOUND);
     }
 
+    @Test
+    void shouldTestToInfinity(){
+        for (int i=0;i<20;++i){
+            adjacencyCursor.nextVLong();
+        }
+        assertThat(adjacencyCursor.peekVLong()).isEqualTo(AdjacencyCursor.NOT_FOUND);
+    }
+
     @Test
     void shouldAdvanceWithFilter() {
         assertThat(adjacencyCursor.advance(6L)).isEqualTo(6L);