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What is API testing and how it works?

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What is API testing and how it works?

API testing is a type of software testing that analyzes an application program interface (API) to verify it fulfills its expected functionality, security, performance and reliability. An API test is generally performed by making requests to one or more API endpoints and comparing the response with expected results.

How do I manually run API testing?

Steps for Testing REST API

  1. Step 1) Open Advanced REST client.
  2. Step 2) Enter the URL of API to test.
  3. Step 3) Select the HTTP method.
  4. Step 4) Provide Headers set.
  5. Step 5) Confirm the Headers set.
  6. Step 6) Provide required Body content.
  7. Step 7) Submit the details to start the test.
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What do you check in API testing?

The API layer of any application is one of the most crucial software components….For each API request, the test would need to take the following actions:

  1. Verify correct HTTP status code.
  2. Verify response payload.
  3. Verify response headers.
  4. Verify correct application state.
  5. Verify basic performance sanity.

What is API testing in simple words?

Definition: API (Application Programming Interface) testing is a type of software testing that aims to determine whether the APIs that are developed meet expectations when it comes to functionality, performance, reliability and security for an application. API testing is used to determine the return value (response).

Why do we perform API testing?

At its most basic level, API testing is intended to reveal bugs: inconsistencies or deviations from the expected behavior. Continuous testing is also very important to make sure it continues to work when the public has access to it.

When do we do API testing?

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Why do we do API testing?

The purpose of API Testing is to check the functionality, reliability, performance, and security of the programming interfaces. In API Testing, instead of using standard user inputs(keyboard) and outputs, you use software to send calls to the API, get output, and note down the system’s response.

When do you do API testing?

API testing involves testing the application programming interfaces (APIs) directly and as part of integration testing to determine if they meet expectations for functionality, reliability, performance, and security. Since APIs lack a GUI, API testing is performed at the message layer.