Tosca API Testing Tutorial

 Tosca by Tricentis is a powerful automation tool widely used for end-to-end functional testing, including API testing. API testing in Tosca helps validate backend services by sending requests and verifying responses—without the need for a UI.

This tutorial walks you through the basics of API testing in Tosca.


🧩 What is API Testing in Tosca?

API testing in Tosca involves:

  • Sending HTTP requests (GET, POST, PUT, DELETE, etc.)
  • Verifying response status codes, headers, and body
  • Working with REST, SOAP, or GraphQL APIs
  • Tosca allows you to create API TestCases using API Modules, with no scripting required.


🛠️ Step-by-Step Tosca API Testing Tutorial

🔹 Step 1: Set Up Your Workspace

Launch Tosca Commander.

Create a new workspace or open an existing one.

Create a new folder under TestCases for your API tests.


🔹 Step 2: Scan the API (Using API Scan)

Open Tricentis API Scan (installed with Tosca).

Enter the endpoint URL (e.g., https://jsonplaceholder.typicode.com/posts)

Choose the method: GET, POST, etc.

Click Send to view the response.

If the API works, click Export to Tosca to generate reusable API modules.


🔹 Step 3: Create a TestCase from API Modules

In Tosca Commander, navigate to the Modules section.

Drag the scanned API module (e.g., GET /posts) into your TestCases folder.

Right-click and choose Create TestCase.


🔹 Step 4: Configure Input Parameters

In the TestStep:

Provide inputs in the Input field (e.g., id = 1).

You can use Tosca TestCase Parameters for dynamic values.


🔹 Step 5: Validate Response

Right-click on the response field (e.g., status code, body.id) and choose Verify.

Set expected values in the Verify column.

Tosca will check if the actual API response matches your expectations.


🔹 Step 6: Run the Test

Click the Run button or press F6.

Tosca executes the API request and verifies the result.

Check the Execution Log for pass/fail results.


📦 Useful Features in Tosca API Testing

Feature                                                  Purpose

API Scan Discover and scan                   API endpoints

Authentication Support                         Test secured APIs with Basic/OAuth tokens

JSON Path/XPath                                 Validate specific fields in response bodies

Chaining                                                 Pass data between API calls

Data-driven Testing                         Use test data from Excel, CSV, or DB


🧠 Best Practices

  • Always validate status codes and response content.
  • Use chaining to simulate real workflows (e.g., login → fetch user info).
  • Use TestCase parameters for flexibility and reuse.
  • Store your APIs and modules in organized folders.


🔚 Conclusion

Tosca simplifies API testing with its no-code interface, built-in API scanner, and powerful verification features. Whether you’re testing REST or SOAP APIs, Tosca allows you to create scalable, reusable, and data-driven API tests quickly.

Learn Tosca Training Course

Read More:

Data-Driven Testing in Tosca

Tosca Excel Integration for Test Data

Automating Web Applications Using Tosca

Tosca for SAP Application Testing

Visit Quality Thought Training Institute

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