### Question:
ODataJPAEdmProvider extends EdmProvider { @Override public AssociationSet getAssociationSet(final String entityContainer, final FullQualifiedName association, final String sourceEntitySetName, final String sourceEntitySetRole) throws ODataException { EntityContainer container = null; if (!entityContainerInfos.containsKey(entityContainer)) { container = (EntityContainer) getEntityContainerInfo(entityContainer); } else { container = (EntityContainer) entityContainerInfos.get(entityContainer); } if (container != null && association != null && container.getAssociationSets() != null) { for (AssociationSet as : container.getAssociationSets()) { if (association.equals(as.getAssociation())) { AssociationSetEnd end = as.getEnd1(); if (sourceEntitySetName.equals(end.getEntitySet()) && sourceEntitySetRole.equals(end.getRole())) { return as; } else { end = as.getEnd2(); if (sourceEntitySetName.equals(end.getEntitySet()) && sourceEntitySetRole.equals(end.getRole())) { return as; } } } } } return null; } ODataJPAEdmProvider();  ODataJPAEdmProvider(final ODataJPAContext oDataJPAContext); ODataJPAContext getODataJPAContext(); void setODataJPAContext(final ODataJPAContext jpaContext); @Override EntityContainerInfo getEntityContainerInfo(final String name); @Override EntityType getEntityType(final FullQualifiedName edmFQName); @Override ComplexType getComplexType(final FullQualifiedName edmFQName); @Override Association getAssociation(final FullQualifiedName edmFQName); @Override EntitySet getEntitySet(final String entityContainer, final String name); @Override AssociationSet getAssociationSet(final String entityContainer, final FullQualifiedName association,
      final String sourceEntitySetName, final String sourceEntitySetRole); @Override FunctionImport getFunctionImport(final String entityContainer, final String name); @Override List<Schema> getSchemas();  }### Answer:
@Test public void testGetAssociationSet() { AssociationSet associationSet = null; try { associationSet = edmProvider.getAssociationSet("salesorderprocessingContainer", new FullQualifiedName("salesorderprocessing", "SalesOrderHeader_SalesOrderItem"), "SalesOrderHeaders", "SalesOrderHeader"); } catch (ODataException e) { fail(ODataJPATestConstants.EXCEPTION_MSG_PART_1 + e.getMessage() + ODataJPATestConstants.EXCEPTION_MSG_PART_2); } assertNotNull(associationSet); assertEquals("SalesOrderHeader_SalesOrderItemSet", associationSet.getName()); try { associationSet = edmProvider.getAssociationSet("salesorderprocessingContainer", new FullQualifiedName("salesorderprocessing", "SalesOrderHeader_SalesOrderItem"), "SalesOrderItems", "SalesOrderItem"); } catch (ODataException e) { fail(ODataJPATestConstants.EXCEPTION_MSG_PART_1 + e.getMessage() + ODataJPATestConstants.EXCEPTION_MSG_PART_2); } assertNotNull(associationSet); try { associationSet = edmProvider.getAssociationSet("salesorderproceContainer", new FullQualifiedName("salesorderprocessing", "SalesOrderHeader_SalesOrderItem"), "SalesOrderItems", "SalesOrderItem"); } catch (ODataException e) { assertTrue(true); } }