1.5Collection Runner

The Collection Runner executes all requests in a collection sequentially, with test assertions.

Running a Collection

1. Click "Runner" in Postman
2. Select the collection
3. Choose the environment
4. Set iterations (run the entire collection N times)
5. Upload a data file for data-driven testing

Data-Driven Testing

Create a CSV or JSON file with test data:

email,password,expected_status
valid@test.com,ValidPass123!,200
invalid@test.com,wrong,401
,ValidPass123!,400
valid@test.com,,400

In the request body, reference columns: {{email}}, {{password}}

In the test script:

pm.test(`Login with ${pm.iterationData.get("email")} returns ${pm.iterationData.get("expected_status")}`, () => {
    pm.response.to.have.status(parseInt(pm.iterationData.get("expected_status")));
});