Examples with RelationshipData org.neo4j.internal.recordstorage.FlatRelationshipModifications.RelationshipData used on opensource projects

Example 6 with RelationshipData

use of org.neo4j.internal.recordstorage.FlatRelationshipModifications.RelationshipData in project neo4j by neo4j.

the class RelationshipModifierTest method shouldCreateAndDelete.

// ... other known cases ...
@RepeatedTest(20)
void shouldCreateAndDelete() {
    // given and initial state
    long node = createEmptyNode();
    IntSupplier typeStrategy = randomTypes(10);
    Supplier<RelationshipDirection> directionStrategy = RANDOM_DIRECTION;
    LongSupplier otherNodeStrategy = this::createEmptyNode;
    int maxRelationships = 100;
    List<RelationshipData> expectedRelationships = generateRelationshipData(random.nextInt(0, maxRelationships), node, typeStrategy, otherNodeStrategy, directionStrategy);
    createRelationships(expectedRelationships);
    // ... a set of relationships to create and delete
    List<RelationshipData> relationshipsToCreate = generateRelationshipData((int) random.among(new long[] { 0, 1, 10, 100 }), node, typeStrategy, otherNodeStrategy, directionStrategy);
    int numRelationshipsToDelete = min((int) random.among(new long[] { 0, 1, 10, maxRelationships }), expectedRelationships.size());
    RelationshipData[] relationshipsToDelete = random.selection(expectedRelationships.toArray(RelationshipData[]::new), numRelationshipsToDelete, numRelationshipsToDelete, false);
    // ... and rules for how the world changes "concurrently" while we perform these modifications
    // on locked
    monitors.addMonitorListener(new ResourceTypeLockOrderVerifier());
    // on read
    monitors.addMonitorListener(new ChangeWorldOnReadMonitor(node, typeStrategy, otherNodeStrategy, directionStrategy, expectedRelationships));
    // when
    RelationshipModifications modifications = modifications(relationshipsToCreate.toArray(RelationshipData[]::new), relationshipsToDelete);
    modify(modifications);
    applyModificationsToExpectedRelationships(modifications, expectedRelationships);
    // then
    assertThat(readRelationshipsFromStore(node, store)).isEqualTo(asSet(expectedRelationships));
}