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Computer Science

What is Lorem Ipsum?

Lorem Ipsum is simply dummy text of the printing and typesetting industry. Lorem Ipsum has been the industry's standard dummy text ever si

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What is Lorem Ipsum?
Lorem Ipsum is simply dummy text of the printing and typesetting industry. Lorem Ipsum has been the industry's standard dummy text ever sin

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<h2 id="209044ab-8133-41b6-ba47-17b170012c7d" data-toc-id="209044ab-8133-41b6-ba47-17b170012c7d">What is API testing?</h2>API testing is the process of sending requests to an API and monitoring the responses to ensure its behaving as expected. API testing is designed to assess the functionality, reliability, performance, and security of an API, and is therefore an essential part of the API development lifecycle.Software application development is dominated by the three-layered architecture approach, which is an architecture made up of a presentation layer, business logic layer, and database layer.<a target="_blank" rel="noopener noreferrer nofollow" href="https://medium.com/swlh/onion-architecture-vs-three-layer-59a9ba2c6e02">Image Source</a>The business logic layer contains the core functionality, or components, of the application. It must take information inputted by the user from the presentation layer, query the database layer and transform that data according to the business logic, and present the results back to the user via the presentation layer. But the business logic layer must also communicate with other applications as well as human users. To do so, it uses an API.<a target="_blank" rel="noopener noreferrer nofollow" href="https://www.inflectra.com/rapise/highlights/api-testing.aspx">Image Source</a>So API testing is designed to validate the business logic as well as the performance, security, and other aspects of the application. API testing does not focus on the individual components of an application, like unit testing, or the look and feel of the application, like user interface (UI) testing, but on what the application does.<a target="_blank" rel="noopener noreferrer nofollow" href="https://www.inflectra.com/rapise/highlights/api-testing.aspx">Image Source</a>To assess whether the API works like it’s supposed to, you need to run multiple tests. Let’s take a look at the most common types below.<h3 id="8899ab30-81b2-4fe0-b720-81ed95cdcc12" data-toc-id="8899ab30-81b2-4fe0-b720-81ed95cdcc12">Types of API Testing</h3>There are multiple API testing approaches, including:<ul><li style="color: inherit">Functional testing. These API tests are designed to check that an API returns the right response for a given request.</li><li style="color: inherit">Load testing. This type of API test gauges how an API handles a large volume of requests over a short period.</li><li style="color: inherit">Runtime and error detection testing. These API tests are designed to evaluate the actual running of the API and typically focus on monitoring, execution errors, resource leaks, or error detection.</li><li style="color: inherit">Security testing. These tests assess how an API responds to and <a target="_blank" rel="noopener noreferrer nofollow" href="https://blog.hubspot.com/website/api-security?hubs_content=blog.hubspot.com/website/api-testing&amp;hubs_content-cta=resists%20cyberattacks">resists cyberattacks</a>.</li><li style="color: inherit">Penetration Testing. Penetration tests involve users with limited API knowledge trying to attack the API, which enables testers to assess the threat vector from an outside perspective.</li><li style="color: inherit">Fuzz Testing. This type of API test sends a large number of randomized requests to see if your API responds with errors, processes any of these inputs incorrectly, or crashes.</li><li style="color: inherit">Validation testing. Validation tests are run late in the testing stage to verify the behavior and efficiency of the API.</li></ul>For a more in-depth overview of what API testing is, including the different types of API testing as well as the benefits and challenges, check out this video:<div class="iframe-wrapper"><iframe src="https://www.youtube.com/embed/5qSoeAomkLA" frameborder="0" allowfullscreen="true"></iframe></div><h2 id="cd96705d-5ec8-426f-811d-4cc1bc204a19" data-toc-id="cd96705d-5ec8-426f-811d-4cc1bc204a19">Why is API testing important?</h2>API testing is important for ensuring that your API performs as expected when faced with a wide variety of expected and unexpected requests. This process is designed to not only test the API’s functionality — but also its reliability, performance, and security.API testing is also important because it offers several advantages over other types of testing, like unit and UI testing.For example, unit tests are designed to verify the functionality of individual components within a single application whereas API tests are designed to verify that all system components function as intended. This broader test coverage makes it easier to identify any bugs in the unit, database, and server levels.API tests are also faster to run and more isolated than UI tests, which makes it quicker and easier to identify and resolve bugs. According to <a target="_blank" rel="noopener noreferrer nofollow" href="https://andersenlab.com/">data from Andersen Lab</a>, a UI test runs for approximately seven minutes while an API test runs for 12 seconds. Meaning, an API test is about 35 times faster than a UI test.Perhaps most importantly, API testing allows developer operations, quality assurance, development, and other teams to begin testing an application’s core functionality before the user interface is ready. This enables them to identify any errors or weaknesses early on in the development process. If identified later in the process, these errors and weaknesses in the build can be costly to fix, requiring large amounts of code to be rewritten and significantly delaying the product’s release.Now that we understand some of the benefits of API testing, let’s walk through how to perform it.<h2 id="8adc9f29-ddbe-4bc5-9710-a1fd5b94e796" data-toc-id="8adc9f29-ddbe-4bc5-9710-a1fd5b94e796">How to Do API Testing</h2><ol><li style="color: inherit">Review the API specification.</li><li style="color: inherit">Determine API testing requirements.</li><li style="color: inherit">Define input parameters.</li><li style="color: inherit">Create positive and negative tests.</li><li style="color: inherit">Select an API testing tool.</li><li style="color: inherit"></li></ol>

Short description: What is Lorem Ipsum?
Lorem Ipsum is simply dummy text of the printing and typesetting industry. Lorem Ipsum has been the industry's standard dummy text ever since the 1500s, when an unknown printer took a galley o 5 6

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