An example on how to use BDD syntax to verify a method is called

BDDVerify.java

@Test
public void saveCustomer_savesTheCustomerToTheDatabase() {
    // Given
    Customer customer = new Customer(123, "Sam");

    // When
    Customer result = customerService.saveCustomer(customer);

    // Then
   then(mockCustomerRepository)
       .should(times(1))
       .save(customer)
}