Mastering API Testing with Postman: From Novice to Pro

You can send requests in Postman to connect to APIs you are working with. Your requests can retrieve, add, delete, and update data. Whether you are building or testing your own API, or integrating with a third-party API, you can send your requests in Postman. Your requests can send parameters, authorization details, and any body data you require.

Postman's cookie manager enables you to view and edit cookies that are associated with different domains. You can manually create cookies for a domain, or you can capture cookies using the Postman proxy or Postman Interceptor. You can then use the cookies stored in the cookie jar when sending requests in Postman.

The Postman response viewer helps you visualize and check the correctness of API responses. An API response consists of the response body, headers, cookies, and the HTTP status code. You can view details about the response, including test results, network information, response size, response time, and security warnings. You can also save responses as examples or files.

Postman Collections are a group of saved requests. Every request you send in Postman appears under the History tab of the sidebar. On a small scale, reusing requests through the history section is convenient. As your Postman usage grows, it can be time-consuming to find a particular request in your history. Instead of scrolling through your history section, you can save all your requests as a group for easier access.

Postman Collections are a group of saved requests. Every request you send in Postman appears under the History tab of the sidebar. On a small scale, reusing requests through the history section is convenient. As your Postman usage grows, it can be time-consuming to find a particular request in your history. Instead of scrolling through your history section, you can save all your requests as a group for easier access.

The Collection Runner enables you to run a collection's requests in a specified sequence. You can run collections manually, on a schedule, from a monitor, from a webhook, or in your CI/CD pipeline by running it from the command line.

Examples show your API endpoints in action and give more details on how requests and responses work. You can add an example to a request by saving a response, or you can create an example with a custom response to illustrate a specific use case. Once you've created examples, you can use them to set up a mock server or add more detail to your API documentation.

During a performance test, all requests are sent from your computer where you are running the Postman desktop app. You can view real-time metrics such as the average response time, error rate, and throughput. You can also customize the performance test graph to focus on the requests or test metrics you're most interested in.

Postman's runtime is based on Node.js and lets you add dynamic behavior to requests and collections. You can use pre-request and test scripts to write API tests, build requests that can contain dynamic parameters, pass data between requests, and more.

Pre-request and test scripts execute asynchronously. This enables you to execute multiple scripts without waiting for the previous one to complete. If you'd like scripts to execute in sequence, you can use a callback function.

Postman's runtime is based on Node.js and lets you add dynamic behavior to requests and collections. You can use pre-request and test scripts to write API tests, build requests that can contain dynamic parameters, pass data between requests, and more.

Pre-request and test scripts execute asynchronously. This enables you to execute multiple scripts without waiting for the previous one to complete. If you'd like scripts to execute in sequence, you can use a callback function.

Postman Monitors provide a way to automatically run test scripts and perform other tests at regular intervals. When you set up a collection-based monitor, you choose a collection with the requests and test scripts you want to run, and you specify how frequently Postman runs the collection. You'll be notified if a test fails, and all results are recorded on the monitor's dashboard.