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API testing myths debunked


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API integrity plays a vital role in ‘The API Economy’. Yet many are confused about the kind of testing required to ensure secure and reliable APIs. Discover the truth about API testing and the negative impact businesses face when APIs are not tested properly.

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API testing myths debunked

  1. 1. Copyright © 2014 Parasoft 1 2015-03-24 "5 Myths about API testing: There's more than meets the UI"
  2. 2. Copyright © 2014 Parasoft 22 APIs Everywhere and Here to Stay A few years ago, we entered the era of mobile computing API failure means your apps fail, and your quality and reputation take a direct hit that flows to your bottom line But that came with some challenges: API Testing reduces the business risk of faulty APIs Many devices, many networks and many connections. Apps connect devices to vast amounts of servers and data through complex APIs. How do you ensure that the APIs work as planned?
  3. 3. Copyright © 2014 Parasoft 33 Every App Has its API…to Test The fact that an API is published does not decrease the test scenarios required; it increases test scenarios in all dimensions Enterprise apps rely on a myriad of internal, external and public APIs Testing APIs must include different networks, end-points and interfaces Test Scenarios NowThen
  4. 4. Copyright © 2014 Parasoft 44 Myth #1 about Testing APIs Public APIs, even the few with SLAs, are the responsibility of third parties – you may trust them, but you must verify them, with API Testing If it’s a published API, it’s been tested and guaranteed. No further testing required. Just because an API is “published” does not mean that the API has been tested with anything, particularly your custom applications You cannot afford to overlook the gaps in testing APIs with your applications 1# MIND THE GAP
  5. 5. Copyright © 2014 Parasoft 55 Myth #2 about Testing APIs GUI tests are extremely fragile and are not designed to exercise the integration layer Tested through the GUI of your applications does not mean you have fully tested the API and its other interactions Assuming that you’ve tested the API from the GUI means on average 10% test coverage We’ve tested the API through our application’s graphical user interface testing.2#
  6. 6. Copyright © 2014 Parasoft 66 Myth #3 about Testing APIs End-user experience is dependent upon everything working together flawlessly, not a single message transaction While direct testing may provide validation of connectivity, it will not exercise the end-to-end logic of the API and its interactions with dependent systems Composite applications are dependent upon multiple transactions Our GUI testers can exercise the API directly… It seems pretty straightforward. You thought you could manage simple transactions… …until you realized the API was more complicated (with multiple operations and elements) 3#
  7. 7. Copyright © 2014 Parasoft 77 Testing modern composite applications requires access to an average of 30 dependent applications (APIs, mainframes, web services and other systems dependencies), yet only 20% can be accessed easily for testing Myth #4 about Testing APIs This complexity does not mean end-to-end testing cannot be performed Technologies like service virtualization (test environment simulation), when coupled with API Testing, provide for comprehensive testing across all application dependencies End-to-end tests are not feasible, because there are too many dependencies involved.4#
  8. 8. Copyright © 2014 Parasoft 88 …doesn’t mean you’ve tested this! Myth #5 about Testing APIs Methodologies like Agile Development require that application logic changes, improves and evolves Because you tested this… APIs that were tested once and worked will continue to work as long as the API hasn’t changed. In order to ensure the integrity of the API, any material change to the API requires a re-validation of the API and its system dependencies Creating a regression test suite that exercises dependent APIs consistently is required for API integrity 5#
  9. 9. Copyright © 2014 Parasoft 99 The Costs of not Testing APIs If you’re leveraging APIs to enhance your customer’s experience, you must ensure that the APIs can meet or exceed your business expectations If software is the interface to your business, then the customer’s experience is only as good as the weakest link in your software Switching costs for software are at an all-time low; subscription models and common interfaces mean that loyalty has to be earned with quality and innovation
  10. 10. Copyright © 2014 Parasoft 1010 Parasoft API Testing: Real Results Parasoft API Testing has helped accelerate and transform application testing for many leading companies and agencies
  11. 11. Copyright © 2014 Parasoft 1111 Parasoft Leadership Over 7,000 companies trust Parasoft Rock-solid, profitable since the 1990s IP war chest with 32 defect prevention patents Service Virtualization API Testing Development Testing SHIFT LEFT Test early, test often, with the leader in Continuous Testing: Parasoft
  12. 12. Copyright © 2014 Parasoft 12 2015-03-24 Download Whitepaper