public with sharing class DividingLogic implements Queueable {
      public String recId;

      public DividingLogic(String recId){

      }

      public void execute(QueueableContext segId){
        // calls a static method of another class

      }
}

public void testmethod afterInsertTest(){

    // Given
    fflib_ApexMocks mocks = new fflib_ApexMocks();
    Queueable mockQueue = (Queueable)mocks.mock(DividingLogic.class);

// When
// I am wondering how would I pass the QueueableContext here
// How do I call the execute() method of Queueable


// Then
// I want to check whether the class was enqueued from the trigger
// or called at only 1 time from the trigger.
// ((Queueable)mocks.verify(mockQueue,1).execute(); ??


}