01
When it fits
A product is already in use, or a change is underway, and it must be clear whether the change holds and how the system behaves in production.
— TECHNOLOGY & ENGINEERING
07
QA, testing & observability
Checks that a change holds, and signals that show what the running product is doing. Quality work sits inside the engagement that builds or improves the product.
HOW IT FITS
Used when the
product needs them.
Technology follows the product and operational needs — not the other way around.
02
How we use it
Tests and monitoring follow the product under review. Unit, API, and end-to-end checks, plus metrics and traces, are added where that change needs them.
IN THIS CAPABILITY
Technologies in
this group.
Each name is used when that part of the product needs it.
Jest
Testing
A test runner for JavaScript and TypeScript units. It is used when the interface or the service has tests written for it.
Discuss this technologyCypress
Testing
A tool for browser tests that click through a product. It is used when a flow needs to be checked in a browser.
Discuss this technologyPlaywright
Testing
A tool for browser tests across more than one browser engine. It is used when a flow needs to be checked in a browser.
Discuss this technologySelenium
Testing
A tool for driving a browser in a test. It is used when an existing suite already runs that way.
Discuss this technologyJUnit
Testing
A test framework for Java units. It is used when the Java code has tests written for it.
Discuss this technologyMockito
Testing
A Java library for test doubles. It is used when a unit test needs to stand in for a collaborator.
Discuss this technologyPytest
Testing
A test framework for Python. It is used when the Python code has tests written for it.
Discuss this technologyPostman
Testing
A tool for calling HTTP APIs by hand and from a collection. It is used when an API needs to be checked that way.
Discuss this technologyREST Assured
Testing
A Java library for checking HTTP APIs in tests. It is used when the API tests are written in Java.
Discuss this technologyTestContainers
Testing
A library that starts real dependencies in containers for a test. It is used when a test needs the real database or broker.
Discuss this technologyUnit, integration, E2E and API testing
Testing
The practice of checking a change with unit, integration, end-to-end, and API tests. The mix follows the product under review.
Discuss this technologyPrometheus
Tool
A system for collecting numeric measurements from a running product. It is used when the team needs those measurements.
Discuss this technologyGrafana
Tool
A tool for dashboards on measurements and logs. It is used when the team looks at the product that way.
Discuss this technologyELK
Tool
A stack for collecting and searching logs. It is used when the team searches logs that way.
Discuss this technologyLoki
Tool
A system for collecting and querying logs. It is used when the team stores logs that way.
Discuss this technologySentry
Tool
A tool for recording application errors. It is used when the team needs to see failures from a running product.
Discuss this technologyOpenTelemetry
Tool
A set of APIs and tools for traces, metrics, and logs. It is used when the product should emit telemetry in that form.
Discuss this technologyJaeger
Tool
A system for viewing distributed traces. It is used when the team follows a request across services.
Discuss this technologyQA
Testing
Checks that a change holds, inside an engagement that is already building or improving a product. The check follows the product under review.
Discuss this technologyOTHER CAPABILITIES
More of what
we use.
Each group is used when the product needs it.