The Qodex blog
Articles and guides on API testing, QA automation, and CI.
What Is API Testing? Types, Examples & Best Practices
Learn API testing from first request to CI. See test types, a runnable example, automation, tools, best practices, and a checklist for reliable APIs.
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Functional Testing vs Regression Testing: Differences and When to Use Each
Compare functional testing vs regression testing by purpose, timing, scope, owners, and CI triggers. Run both without duplicating tests.
JMeter API Testing: From a First REST Test Plan to a CI Run
JMeter API testing, start to finish: build a REST test plan, add headers and JSON checks, run it in CI, and publish the HTML report.
Playwright Accessibility Testing with axe-core
Playwright accessibility testing with axe-core: scan the state a test reaches, keep the full result, and block serious violations in CI.
Playwright Component Testing: Setup, Examples, and Limits
Set up Playwright component testing for React, Vue, and Svelte. Learn the current story-gallery workflow, legacy setup, limits, and alternatives.
Playwright Performance Testing: What It Can and Cannot Do
Playwright performance testing: what it measures, how to capture LCP and timing data, where it stops, and when to use k6 browser or Artillery.
pytest vs unittest: Which Python Test Framework Should You Use?
Compare pytest and unittest with runnable tests, fixtures, parameterization, discovery, plugins, CI commands, and a safe migration path.
Salesforce API Testing: REST, SOAP, Bulk, Pub/Sub and GraphQL
Salesforce API testing across REST, SOAP, Bulk 2.0, Pub/Sub and GraphQL: OAuth JWT setup, sandbox choice, org call limits and a runnable script.
Sauce Labs Alternatives in 2026: A Review and 11 Tools Compared
Sauce Labs alternatives compared: eleven tools by price, device coverage, self-hosting and AI testing, plus what Sauce Labs costs and where it stops.
Snyk AI Code Review: Features, Pricing, Limits, and Alternatives
Snyk AI-powered code review features, pricing and limits, plus 12 alternatives for security, pull request review and runtime testing.
Testim AI Test Automation: Features, Pricing, Limits, and 12 Alternatives
What Testim AI test automation does, what its pricing page publishes, where it stops, and 12 alternatives for web, mobile, Salesforce and open source.
HTTP 401 vs 403: What Is the Difference?
Learn when to return HTTP 401 or 403, which headers each needs, how to fix common framework errors, and how to test both responses.
HTTP 422 Unprocessable Content: Meaning, Causes, and Fixes
Learn what the HTTP 422 status code means, how it differs from 400, 409, and 415, how to fix it in common frameworks, and how to test it.