Postman Postbot to Generate API Tests
Postman Postbot to Generate API Tests
Postman Postbot is an AI-powered assistant in Postman that simplifies generating API tests by understanding API specifications and suggesting test cases.
What is Postbot in Postman?
Postbot helps you:
- Generate API test scripts (e.g., pre-request and test scripts).
- Automate common tasks like schema validation or response checks.
- Optimize suggested test cases based on feedback.
Enabling Postbot in Postman
- Open Postman: Ensure you have the latest version installed.
- Navigate to Collections or Requests: Open the request or collection you want to add tests to.
- Activate Postbot: Click the “Ask Postbot” option in the test script section.
Generating Tests Using Postbot
- Open the API request in Postman.
- Use the Postbot tool.
- Provide prompts like:
- “Generate a test script to validate status code 200.”
- “Write a test to verify the JSON response contains the key
user_id
.”
- or use the predefined AI prompts.
Example Prompts for Postbot
- “Generate a test script to check if the response body includes a specific field.”
- “Write a test to validate the response headers contain
Content-Type: application/json
.” - “Create a script to loop through an array in the response and verify all items have a
status: active
.”
Example Test Scripts Generated by Postbot
Status Code Validation
pm.test("Status code is 200", function () {
pm.response.to.have.status(200);
});
JSON Schema Validation
const schema = {
type: "object",
properties: {
userId: { type: "number" },
name: { type: "string" },
email: { type: "string" }
},
required: ["userId", "name", "email"]
};
pm.test(“Response conforms to schema”, function () {
pm.response.to.have.jsonSchema(schema);
});
Response Time Check
pm.test("Response time is less than 200ms", function () {
pm.expect(pm.response.responseTime).to.be.below(200);
});
Fine-tuning Generated Tests
Edit the generated tests to ensure they meet your specific requirements, and use variables for reusability.
For best results
Combine Postbot’s suggestions with manual validation for robust tests. Regularly update test scripts to handle API changes. Organize and manage tests using Postman Collections.
Video Tutorial