Tests Read Like Documentation
Karate unifies API, UI, and performance testing in a single, readable format that your entire team can understand and maintain.
- ✓No programming knowledge required
- ✓Combines API, UI, and performance testing
- ✓Results in seconds, not minutes
Feature: Simple API test example
Scenario: Get user details
Given url 'https://api.example.com'
And path 'users', userId
When method GET
Then status 200
And match response.name == 'John Doe'
And match response.email contains '@example.com'
Parallel Execution That Scales
Karate runs hundreds of tests in parallel out of the box - Features, Scenarios, even Example rows all execute simultaneously. Cut your test execution time by 10x with zero configuration.
- ✓True parallel execution - not just suite level
- ✓Thread-safe HTML, JSON & JUnit reports
- ✓Smart thread management with visual timeline
Karate version: 1.5.1
======================================================
elapsed: 2.42 | threads: 12 | thread time: 13.29
features: 24 | skipped: 0 | efficiency: 0.46
scenarios: 48 | passed: 48 | failed: 0
======================================================
Powerful Assertions
Karate's assertions make testing complex responses easy. With one powerful keyword, match, you can validate complete responses, headers, and arrays in a way that is both robust and readable.
- ✓Assertions work out of the box
- ✓Deep payload checks
- ✓Confidence at scale
# Assert full payload with smart validators
And match response == """
{
id: '#number'
name: '#string'
email: '#string'
active: true
createdAt:'#ignore'
}
"""
# Flexible checks for real-world APIs
And match response.email contains '@example.com'
And match response.roles contains only ['admin' 'editor']
And match each response.orders == { id: '#number' total: '#number' }
Performance Testing
Reuse your API tests as performance tests with zero changes. Karate integrates seamlessly with Gatling to provide load testing, stress testing, and detailed performance metrics using the same test definitions.
- ✓Reuse API tests for performance testing
- ✓Seamless Gatling integration
- ✓Detailed performance metrics included
Feature: Performance Testing
Scenario: Load test API endpoint
Given url 'https://api.example.com/users'
And configure headers = { 'Authorization': '#(token)' }
When method GET
Then status 200
# Run with Gatling integration
# mvn test -Dkarate.env=perf
# Results: 1000 users, 50 req/sec, 99th percentile < 500ms
CI-Ready Reporting
Karate generates clear HTML reports and CI-ready outputs out of the box—so your team can debug faster while pipelines get reliable pass/fail signals.
- ✓HTML reports with inline request/response logs
- ✓CI-ready JUnit XML and Cucumber JSON
- ✓Parallel execution timeline for faster feedback
- ✓Plug-and-play with cucumber-reporting, Cluecumber, and ReportPortal.io
- ✓Configurable verbosity and selective hiding
- ✓Works with code coverage tools like JaCoCo
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