API testing

Generate boundary-value cases

Hard120 pts~45 min
  • Boundary value analysis
  • Data-driven testing
Practice app · Acme REST API

A live REST + GraphQL API with auth, validation, pagination, rate limiting and an interactive request console.

BASE_URL
/api/practice
Console app
/lab/api-testing-generate-boundary-value-cases

Your starter code already declares BASE_URL — call the API relative to it.

Objective

Test the payment decline boundary (amount > 1000) with values on and around the edge.

Your task

  1. 1Generate the amounts 999.99, 1000 and 1000.01.
  2. 2POST BASE_URL + "/payments" with { "amount": <value> } for each.
  3. 3Assert 999.99 and 1000 → 200 { status: "approved", transactionId }; 1000.01 → 402 { status: "declined", reason: "insufficient_funds" }.

Acceptance criteria

  • POST /payments returns 200 at the boundary
  • POST /payments returns 402 above it
  • The cases are data-driven
  • At least 3 assertions pass

Fixtures

apiKey
tqa_live_key_123
basicUser
admin
basicPassword
secret
username
qa@target.dev
password
Test@123

API testing · API Testing · Data-driven & parameterization