Verify the Integrity
of Your Web Services
with API Testing

API testing with Test Studio allows you to easily build effective API tests and prove the reliability and integrity of your APIs. With its intuitive user interface and visual test recorder, Test Studio enables even less experienced QAs to create API tests, without writing a single line of code. Build steps into your API tests directly from recorded HTTP traffic.

Test the integrity of your web services by executing HTTP requests and perform a wide range of verifications over the received responses. You can extract the received responses partially or entirely and store them in variables for reuse in further test steps. Control your tests’ flow with steps such as GoTo and Wait. Use conditions to craft flexible verifications and build stable, non-brittle API tests.

Shifting some of the UI interactions into API testing speeds up your test cycles and helps you focus on testing the right things with the right actions. Typical scenarios that can benefit from API calls are:

• Manage the system's initial state and clean the environment after test execution
• Simulate concurrent user actions to test how the UI handles conflicts
• Generate events through the web service and validate API responses

Get easy access to API testing directly from your web, desktop or responsive test projects. Simply create and add a new API test as a step in your test or reuse existing API tests as steps. Greatly reduce test execution time by using the RESTful API instead of the UI layer to perform CRUD (create, read, update, delete) operations.

API testing with Test Studio allows you to create smart tests for your APIs by setting variables for dynamic values on test and project level. The variables are named values that can be stored in the project files or dynamically created during executing the test steps. Variables in API tests can be used to chain requests, generate random values or compare response values, as well as for data-driving and to cover any scenario that requires working with dynamic data.

The embedded Test Studio code editor can be used in API testing to add coded steps and enhance them with various conditions whenever the test scenario requires it. Coded steps go beyond the capabilities which the available action and verification steps in Test Studio provide. To take advantage of coded steps, Test Studio allows you to:

• Add standalone code files that support custom methods and functions or other useful content
• Utilize third-party libraries in you API tests for greater extensibility and flexibility

Leverage the built-in API test runner to hook your API tests into your build process. Schedule your API tests to run on multiple remote machines, around the clock, or as part of your CI/CD environment. Take advantage of even greater API test execution flexibility and speed up your entire end-to-end test cycle by running your tests in Docker Containers. Verify API calls in a production-like environment without slow-downs caused by long and breaking tests.

Test Studio also allows you to create API tests from Fiddler Everywhere logs. Export your Fiddler Everywhere recorded traffic and easily upload it in Test Studio. Create a new Test Studio API test from your Fiddler traffic logs or plug them into an existing API test.