### Question:
AAIVpnBindingResources { public Optional<VpnBindings> getVpnBindingByCustomerVpnId(String customerVpnId) { AAIPluralResourceUri aaiVpnBindingsResourceUri = AAIUriFactory.createResourceUri(AAIFluentTypeBuilder.network().vpnBindings()) .queryParam("customer-vpn-id", customerVpnId); return injectionHelper.getAaiClient().get(VpnBindings.class, aaiVpnBindingsResourceUri); }  boolean existsCustomer(Customer customer); Optional<VpnBindings> getVpnBindingByCustomerVpnId(String customerVpnId); void createVpnBinding(VpnBinding vpnBinding); void createCustomer(Customer customer); Optional<org.onap.aai.domain.yang.VpnBinding> getVpnBinding(String vpnId); void connectCustomerToVpnBinding(String globalSubscriberId, String vpnId);  }### Answer:
@Test public void getVpnBindingByCustomerVpnIdTest() { when(MOCK_aaiResourcesClient.get(eq(VpnBindings.class), isA(AAIPluralResourceUri.class))) .thenReturn(Optional.of(new VpnBindings())); Optional<VpnBindings> vpnBindings = aaiVpnBindingResources.getVpnBindingByCustomerVpnId("testCustomerVpnId"); assertNotNull(vpnBindings.get()); verify(MOCK_aaiResourcesClient, times(1)).get(eq(org.onap.aai.domain.yang.VpnBindings.class), isA(AAIPluralResourceUri.class)); }