Rest API Testing: How to test Rest APIs properly!

Developer Tools API Tools APIs

Swagger Codegen Landing Page

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Swagger Codegen

Swagger Codegen can reduce the complexities that arise in your build process by providing client SDKs and server stubs for any API you want.

An API is like a contract between a client and a server or between two applications. Before testing the implementation, it must be ensured that the contract is correct by checking the specification (e.g. Swagger or OpenAPI). For Rest APIs, it is important that all HTTP REST semantics and principles are adhered to. This is all the more important for publicly accessible APIs so that all functionalities can continue to be guaranteed after updates.

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REST-Assured Landing Page

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REST-Assured

Testing and validating REST services in Java is harder than in dynamic languages such as Ruby and Groovy. REST Assured brings the simplicity of using these languages into the Java domain.

RestAssured: A DSL-based Java tool developed specifically for testing Rest APIs. It provides a simple and expressive syntax for validating API requests and responses.

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JUnit Landing Page

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JU

JUnit

JUnit is a simple framework to write repeatable tests.

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JSON Formatter & Validator Landing Page

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JSON Formatter & Validator

The JSON Formatter was created to help with debugging.

This can look like this, for example. Postman shows you errors in the JSON structure directly. However, you can test it more precisely with this JSON validator.

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