

PactFlow is the complete contract testing platform, allowing teams and enterprises to test API integrations earlier in the software development lifecycle. Screenshot of Pact showing an API incompatibility ( ) PactFlow - contract testing for teams at scale
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Pact tests are written like any other unit test, and requires access to the code base of the System under Test to ensure that any expectations are based on how the consumer and provider behave, so that the tests can't drift from the actual implementation. The main purpose of Pact is to ensure that a consumer (such as a Web App or another API) and a provider API are compatible with each other - without ever having to test them together using an end-to-end integrated test suite.

When combined with PactFlow (or a Pact Broker), it becomes a powerful continuous-delivery tool. It is a code-first tool for testing HTTP and message integrations using an approach known as contract tests. Pact is an open source consumer driven contract testing framework designed to test distributed systems. Screenshot of Postman (courtesy of ) Pact - the most broadly adopted contract testing specification Postman testers can set up test suites (in the form of collections) that contain consumer expectations however, these are not connected to real-world consumer behavior and must be maintained manually. Postman is a provider-only testing tool, in that it does not test how a consumer (e.g., a web application or another API) actually interacts with a provider. It's ideally suited to exploring and collaborating on APIs and running functional API tests. Postman (and Newman) do not require direct access to the code for the System under Test (SUT), as they test it from the outside in a black-box style test. Postman is a collaboration platform for API development, it has a fantastic IDE-like GUI that makes it easy to explore and navigate an API and a scripting language in NodeJS that you can use to automate checks against an API Provider that you can run in your CI pipelines. In this article, we discuss the differences in approach and the pros and cons of using the Pact consumer-driven contract testing framework and Postman for various API testing-related scenarios.

After creating requests, you can specify URL, payloads, and headers, and get detailed behavior information.Contract testing with the OSS Pact framework and PactFlow is often compared to tools like Postman, Insomnia and other REST API testing tools. You can also manage environments, add requests, and import and export data. On its left side, you can create your workspace and folders. Upon launching, you will be greeted by a black-themed and well-organized UI. One of the main reasons that Insomnia is preferred by many is its modern interface. It is a cross-platform program that can be installed with a minimal amount of hassle, so you can get on with your work immediately.
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It is a free and open-sourced development hub that provides you the necessary tools and a suitable environment for your HTTP requests and APIs. However, there are development kits available nowadays that get rid of the nuisances behind testing, organizing, and running HTTP requests and APIs. Not to mention that it's time-consuming since you’ll need to change API keys and work with scripts.

If you worked with HTTP APIs before, then you know how difficult it is to build new commands for every test case. Softonic review A powerful, free REST client
