Sunday, January 5, 2014

11. Negative Test Cases for Lift/Elevator



Whenever, interviewer asks to write minimal test cases, one should ask for BRD or Acceptance Criteria.
Once, the interviewer gives a green signal to frame high level scenarios without requirements’ specification, one should think of following test scenarios:

Test cases for Lift:
  • Capacity of the lift
  • Usability (whether its easy to operate or not)
  • Functionality( whether it functions properly or not)
  • Comfort (whether a person is comfortable in it or not)
  • Height
  • Weight
  • Volume
  • Time it takes to reach every floor
  • Test for maximum capacity of the lift
  • Test for more than max capacity
  • Check the working in case of a power failure

Sometimes, they do ask  for negative test cases also. So, here are the negative test cases which I had mentioned during my interview:

  • Enter more than the specified person
  • Smoke or lit fire inside the lift
  • Try opening door while moving.
  • Press stop before the destination.
  • Press opposite button from the source eg. if on ground floor press down button and vice versa
  • Bring obstacle when lift doors are about to close.

8 comments:

  1. How to judge the maximum no of Test cases? Like if the interviewer asks you how many test cases can you write for the functionality of a Lift?

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  2. Well, Niti, It's a good question. My approach would be I will go through the user story/CR and prepare a draft version of traceability matrix on the basis of requirements which would give me a minimum number of test cases, that I can think of that time. (For More Details read, http://cracksoftwaretestinginterviews.blogspot.in/2014/02/33-rtm-requirements-traceability-matrix.html)
    If interviewer asks this with respect to any particular scenario, it's better to confirm the fixed requirements and let him know your 'traceability matrix approach'. Hope,it helps.

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  3. Good article about all kind of human mobility and lifting solution and we can choose any one of them for our convenience and needs.

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  4. Very well categorisation of scenarios. Thanks for the share

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