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Title: GitHub - goldbergyoni/nodejs-testing-best-practices: Beyond the basics of Node.js testing. Including a super-comprehensive best practices list and an example app (April 2025)

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Description: Beyond the basics of Node.js testing. Including a super-comprehensive best practices list and an example app (April 2025) - goldbergyoni/nodejs-testing-best-practices

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CONTRIBUTING.md	https://github.com/goldbergyoni/nodejs-testing-best-practices/blob/master/CONTRIBUTING.md
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jest.config.js	https://github.com/goldbergyoni/nodejs-testing-best-practices/blob/master/jest.config.js
jest.config.js	https://github.com/goldbergyoni/nodejs-testing-best-practices/blob/master/jest.config.js
mocking.md	https://github.com/goldbergyoni/nodejs-testing-best-practices/blob/master/mocking.md
mocking.md	https://github.com/goldbergyoni/nodejs-testing-best-practices/blob/master/mocking.md
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package.json	https://github.com/goldbergyoni/nodejs-testing-best-practices/blob/master/package.json
tsconfig.json	https://github.com/goldbergyoni/nodejs-testing-best-practices/blob/master/tsconfig.json
tsconfig.json	https://github.com/goldbergyoni/nodejs-testing-best-practices/blob/master/tsconfig.json
README	https://github.com/testjavascript/nodejs-integration-tests-best-practices
Contributing	https://github.com/testjavascript/nodejs-integration-tests-best-practices
	https://github.com/goldbergyoni/nodejs-testing-best-practices/blob/master/graphics/testing-best-practices-banner.png
	https://github.com/testjavascript/nodejs-integration-tests-best-practices#a-detailed-guide-to-modern-testing-with-nodejs
	https://github.com/testjavascript/nodejs-integration-tests-best-practices#authors
	https://github.com/goldbergyoni/nodejs-testing-best-practices/blob/master/graphics/team/yoni.jpg
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	https://github.com/goldbergyoni/nodejs-testing-best-practices/blob/master/graphics/team/daniel.jpg
	https://github.com/testjavascript/nodejs-integration-tests-best-practices#table-of-contents
Strategy & Workflow	https://github.com/testjavascript/nodejs-integration-tests-best-practices#section-1-strategy-and-workflow
Database And Infrastructure Setup	https://github.com/testjavascript/nodejs-integration-tests-best-practices#section-2-infrastructure-and-database-setup
Web Server Setup	https://github.com/testjavascript/nodejs-integration-tests-best-practices#section-3-web-server-setup
The Test Anatomy	https://github.com/testjavascript/nodejs-integration-tests-best-practices#section-4-the-test-anatomy
Integration	https://github.com/testjavascript/nodejs-integration-tests-best-practices#Section-5-integrations
Dealing With Data	https://github.com/testjavascript/nodejs-integration-tests-best-practices#section-6-dealing-with-data
Message Queue	https://github.com/testjavascript/nodejs-integration-tests-best-practices#section-7-message-queues
Mocking	https://github.com/testjavascript/nodejs-integration-tests-best-practices#section-8-mocking
	https://github.com/testjavascript/nodejs-integration-tests-best-practices#athens-workshop--online-course
comprehensive online course - On special sale until April 30th	https://testjavascript.com/
Attend my workshop in City.js Athens	https://greece.cityjsconf.org/
	https://github.com/testjavascript/nodejs-integration-tests-best-practices#example-application
Our Showcase	https://github.com/testjavascript/nodejs-integration-tests-best-practices#-example-application
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More Examples And Platforms	https://github.com/testjavascript/nodejs-integration-tests-best-practices#-recipes
	https://github.com/testjavascript/nodejs-integration-tests-best-practices#-best-practices
	https://github.com/testjavascript/nodejs-integration-tests-best-practices#section-1-strategy-and-workflow
	https://github.com/testjavascript/nodejs-integration-tests-best-practices#️-1-always-start-with-integrationcomponent-tests
the double verification loop model	https://miro.medium.com/max/700/0*c5ahAZusp87Bo6Io.jpg
	https://github.com/goldbergyoni/nodejs-testing-best-practices/blob/master/graphics/component-diagram.jpg
	https://github.com/testjavascript/nodejs-integration-tests-best-practices#️-2-run-a-very-few-e2e-selectively-consider-unit-tests
This article greatly outlines when unit tests shine	https://blog.stevensanderson.com/2009/11/04/selective-unit-testing-costs-and-benefits/
	https://github.com/testjavascript/nodejs-integration-tests-best-practices#️-3-cover-features-not-functions
	https://github.com/testjavascript/nodejs-integration-tests-best-practices#️-4-write-the-tests-during-coding-never-after
	https://github.com/testjavascript/nodejs-integration-tests-best-practices#️-5-test-the-five-known-backend-exit-doors-outcomes
	https://github.com/goldbergyoni/nodejs-testing-best-practices/blob/master/graphics/exit-doors.png
	https://github.com/testjavascript/nodejs-integration-tests-best-practices#section-2-infrastructure-and-database-setup
	https://github.com/testjavascript/nodejs-integration-tests-best-practices#️-1-use-docker-compose-to-host-the-database-and-other-infrastructure
Full code here	https://github.com/testjavascript/nodejs-integration-tests-best-practices/blob/master/example-application/test/docker-compose.yml
	https://github.com/testjavascript/nodejs-integration-tests-best-practices#️-2-start-docker-compose-using-code-in-the-global-setup-process
Jest global setup	https://jestjs.io/docs/en/configuration#globalsetup-string
Mocha global fixture	https://mochajs.org/#global-setup-fixtures
Full code here	https://github.com/testjavascript/nodejs-integration-tests-best-practices/blob/master/example-application/test/global-setup.js#L14-L25
	https://github.com/testjavascript/nodejs-integration-tests-best-practices#️-3-shutoff-the-infrastructure-only-in-the-ci-environment
Full code here	https://github.com/testjavascript/nodejs-integration-tests-best-practices/blob/master/example-application/test/global-teardown.js#L5-L8
	https://github.com/testjavascript/nodejs-integration-tests-best-practices#️-4-optimize-your-real-db-for-testing-dont-fake-it
	https://github.com/testjavascript/nodejs-integration-tests-best-practices#postgres
Full code here	https://github.com/testjavascript/nodejs-integration-tests-best-practices/blob/fb93b498d437aa6d0469485e648e74a6b9e719cc/example-application/test/docker-compose.yml#L1
	https://github.com/testjavascript/nodejs-integration-tests-best-practices#️-5-store-test-data-in-ram-folder
We have conducted multiple performance benchmarks	https://github.com/testjavascript/nodejs-integration-tests-best-practices/issues/9#issuecomment-710674437
Full code here	https://github.com/testjavascript/nodejs-integration-tests-best-practices/blob/fb93b498d437aa6d0469485e648e74a6b9e719cc/example-application/test/docker-compose.yml#L1
	https://github.com/testjavascript/nodejs-integration-tests-best-practices#️-6-build-the-db-schema-using-migrations-ensure-it-happens-only-once-in-dev
umzug which is also used by Sequelize	https://github.com/sequelize/umzug
Full code here	https://github.com/testjavascript/nodejs-integration-tests-best-practices/blob/master/example-application/test/global-setup.js#L29-L30
	https://github.com/testjavascript/nodejs-integration-tests-best-practices#section-3-web-server-setup
	https://github.com/testjavascript/nodejs-integration-tests-best-practices#️-1-the-test-and-the-backend-should-live-within-the-same-process
Full code here	https://github.com/testjavascript/integration-tests-a-z/blob/4c76cb2e2202e6c1184d1659bf1a2843db3044e4/example-application/entry-points/api-under-test.js#L10-L34
	https://github.com/testjavascript/nodejs-integration-tests-best-practices#️-2-let-the-tests-control-when-the-server-should-start-and-shutoff
Full code here	https://github.com/testjavascript/integration-tests-a-z/blob/4c76cb2e2202e6c1184d1659bf1a2843db3044e4/example-application/entry-points/api-under-test.js#L10-L34
	https://github.com/testjavascript/nodejs-integration-tests-best-practices#️-3-specify-a-port-in-production-randomize-in-testing
Full code here	https://github.com/testjavascript/nodejs-integration-tests-best-practices/blob/fb93b498d437aa6d0469485e648e74a6b9e719cc/example-application/test/basic-tests.test.js#L11
	https://github.com/testjavascript/nodejs-integration-tests-best-practices#section-4-the-test-anatomy
	https://github.com/testjavascript/nodejs-integration-tests-best-practices#️-1-stick-to-unit-testing-best-practices-aim-for-great-developer-experience
sister guide here	https://github.com/goldbergyoni/javascript-testing-best-practices
Full code here	https://github.com/testjavascript/integration-tests-a-z/blob/master/example-application/test/basic-tests.test.js#L49-L74
	https://github.com/testjavascript/nodejs-integration-tests-best-practices#️-2-approach-the-api-using-a-library-that-is-a-pure-http-client-eg-axios-not-supertest
Full code here	https://github.com/testjavascript/integration-tests-a-z/blob/master/example-application/test/basic-tests.test.js#L64
	https://github.com/testjavascript/nodejs-integration-tests-best-practices#️-3-provide-real-credentials-or-token-if-possible-avoid-security-back-doors
nock	https://www.npmjs.com/package/nock
Full code here	https://github.com/testjavascript/nodejs-integration-tests-best-practices/blob/fb93b498d437aa6d0469485e648e74a6b9e719cc/example-application/test/basic-tests.test.js#L11
	https://github.com/testjavascript/nodejs-integration-tests-best-practices#️-4-assert-on-the-entire-http-response-object-not-on-every-field
Full code here	https://github.com/testjavascript/integration-tests-a-z/blob/master/example-application/test/basic-tests.test.js#L66-L73
	https://github.com/testjavascript/nodejs-integration-tests-best-practices#️-5-structure-tests-by-routes-and-stories
	https://github.com/goldbergyoni/nodejs-testing-best-practices/blob/master/graphics/test-report-by-route.png
Full code here	https://github.com/testjavascript/nodejs-integration-tests-best-practices/blob/fb93b498d437aa6d0469485e648e74a6b9e719cc/example-application/test/basic-tests.test.js#L11
online course by Yoni Goldberg	https://testjavascript.com
	https://github.com/testjavascript/nodejs-integration-tests-best-practices#️-6-test-the-five-potential-outcomes
	https://github.com/testjavascript/nodejs-integration-tests-best-practices#this-content-is-available-also-as-a-course-or-a-workshop
same content as a course	https://testjavascript.com/
workshop	https://www.eventbrite.com/e/advanced-nodejs-testing-2-meetings-tickets-162539230213
follow here	https://goldbergyoni.com/news-letter/
a private workshop to your team	https://testjavascript.com/contact-2/
	https://github.com/testjavascript/nodejs-integration-tests-best-practices#section-5-integrations-with-other-services-and-apis
	https://github.com/testjavascript/nodejs-integration-tests-best-practices#️-1-isolate-the-component-from-the-world-using-http-interceptor
Full code here	https://github.com/testjavascript/nodejs-integration-tests-best-practices/blob/master/example-application/test/basic-tests.test.js#L27-L32
	https://github.com/testjavascript/nodejs-integration-tests-best-practices#️-2-define-default-responses-before-every-test-to-ensure-a-clean-slate
Full code here	https://github.com/testjavascript/nodejs-integration-tests-best-practices/blob/master/example-application/test/basic-tests.test.js#L34-L37
	https://github.com/testjavascript/nodejs-integration-tests-best-practices#️-3-override-the-happy-defaults-with-corner-cases-using-unique-paths
	https://github.com/testjavascript/nodejs-integration-tests-best-practices#️-4-deny-all-outgoing-requests-by-default
Full code here	https://github.com/testjavascript/nodejs-integration-tests-best-practices/blob/master/example-application/test/basic-tests.test.js#L20-L22
	https://github.com/testjavascript/nodejs-integration-tests-best-practices#️-5-simulate-network-chaos
Full code here	https://github.com/testjavascript/nodejs-integration-tests-best-practices/blob/master/recipes/component-isolation/test/isolation.test.js#L188-L206
	https://github.com/testjavascript/nodejs-integration-tests-best-practices#️-6-catch-invalid-outgoing-requests-by-specifying-the-request-schema
Full code here	https://github.com/testjavascript/nodejs-integration-tests-best-practices/blob/master/example-application/test/basic-tests.test.js#L148-L177
	https://github.com/testjavascript/nodejs-integration-tests-best-practices#️-7-record-real-outgoing-requests-for-awareness
nock recording	https://github.com/nock/nock#recording
Full code here	https://github.com/goldbergyoni/nodejs-testing-best-practices/blob/master
	https://github.com/testjavascript/nodejs-integration-tests-best-practices#️-8-code-against-a-strict-api-provider-contract
openapi-fetch	https://www.npmjs.com/package/openapi-fetch
PACT Consumer-Driven Contracts	https://docs.pact.io/
	https://github.com/goldbergyoni/nodejs-testing-best-practices/blob/master/graphics/contract-options.png
Full code here	https://github.com/goldbergyoni/nodejs-testing-best-practices/blob/master
	https://github.com/testjavascript/nodejs-integration-tests-best-practices#️-9-fake-the-time-to-minimize-network-call-duration
Full code here	https://github.com/testjavascript/nodejs-integration-tests-best-practices/blob/master/recipes/component-isolation/test/isolation.test.js#L163-L186
	https://github.com/testjavascript/nodejs-integration-tests-best-practices#section-6-dealing-with-data
	https://github.com/testjavascript/nodejs-integration-tests-best-practices#️-1-important-each-test-should-act-on-its-own-records-only
The mystery guest syndrome	http://xunitpatterns.com/Obscure%20Test.html#Mystery%20Guest
and this diagram	https://github.com/goldbergyoni/nodejs-testing-best-practices/blob/master/graphics/test-data-types.png
Full code here	https://github.com/testjavascript/nodejs-integration-tests-best-practices/blob/master/example-application/test/basic-tests.test.js#L49-L74
	https://github.com/testjavascript/nodejs-integration-tests-best-practices#️-2-only-metadata-and-context-data-should-get-pre-seeded-to-the-database
See comparison table here	https://github.com/goldbergyoni/nodejs-testing-best-practices/blob/master/graphics/test-data-types.png
Full code here	https://github.com/testjavascript/nodejs-integration-tests-best-practices/blob/master/example-application/test/global-setup.js#L32
Full code here	https://github.com/testjavascript/nodejs-integration-tests-best-practices/blob/master/example-application/test/basic-tests.test.js#L49-L74
	https://github.com/testjavascript/nodejs-integration-tests-best-practices#️-3-assert-the-new-data-state-using-the-public-api
	https://github.com/testjavascript/nodejs-integration-tests-best-practices#️-4-important-choose-a-clear-data-clean-up-strategy-after-all-recommended-or-after-each
See the full comparison table here	https://github.com/goldbergyoni/nodejs-testing-best-practices/blob/master/graphics/db-clean-options.png
Full code here	https://github.com/testjavascript/nodejs-integration-tests-best-practices/blob/master/example-application/test/global-teardown.js#L10-L13
Full code here	https://github.com/testjavascript/nodejs-integration-tests-best-practices/blob/master/recipes/data-isolation/anti-pattern-data-isolation.test.js#L38-L43
online course by Yoni Goldberg	https://testjavascript.com
	https://github.com/testjavascript/nodejs-integration-tests-best-practices#️-5-add-some-randomness-to-unique-fields
Full code here	https://github.com/testjavascript/nodejs-integration-tests-best-practices/blob/master/recipes/data-isolation/data-isolation.test.js#L49-L63
	https://github.com/testjavascript/nodejs-integration-tests-best-practices#️-6-test-also-the-response-schema-mostly-when-there-are-auto-generated-fields
Full code here	https://github.com/testjavascript/nodejs-integration-tests-best-practices/blob/master/example-application/test/basic-tests.test.js#L107-L113
	https://github.com/testjavascript/nodejs-integration-tests-best-practices#️-7-install-the-db-schema-using-the-same-technique-like-production
Full code here	https://github.com/testjavascript/nodejs-integration-tests-best-practices/blob/master/example-application/test/global-setup.js#L31
	https://github.com/testjavascript/nodejs-integration-tests-best-practices#️-8-test-for-undesired-side-effects
Full code here	https://github.com/testjavascript/nodejs-integration-tests-best-practices/blob/master/recipes/data-isolation/data-isolation.test.js#L105-L139
	https://github.com/testjavascript/nodejs-integration-tests-best-practices#this-content-is-available-also-as-a-course-or-a-workshop-1
same content as a course	https://testjavascript.com/
workshop	https://www.eventbrite.com/e/advanced-nodejs-testing-2-meetings-tickets-162539230213
follow here	https://goldbergyoni.com/news-letter/
a private workshop to your team	https://testjavascript.com/contact-2/
	https://github.com/testjavascript/nodejs-integration-tests-best-practices#section-7-message-queues
	https://github.com/testjavascript/nodejs-integration-tests-best-practices#️-1-important-use-a-fake-mq-for-the-majority-of-testing
See comparison diagram here	https://github.com/goldbergyoni/nodejs-testing-best-practices/blob/master/graphics/mq-comparison.png
Full code here	https://github.com/testjavascript/nodejs-integration-tests-best-practices/blob/fb93b498d437aa6d0469485e648e74a6b9e719cc/example-application/test/docker-compose.yml#L1
	https://github.com/testjavascript/nodejs-integration-tests-best-practices#️-2-promisify-the-test-avoid-polling-indentation-and-callbacks
Full code here	https://github.com/testjavascript/nodejs-integration-tests-best-practices/blob/fb93b498d437aa6d0469485e648e74a6b9e719cc/example-application/test/docker-compose.yml#L1
	https://github.com/testjavascript/nodejs-integration-tests-best-practices#️-3-test-message-acknowledgment-and-nack-cknowledgment
Full code here	https://github.com/testjavascript/nodejs-integration-tests-best-practices/blob/fb93b498d437aa6d0469485e648e74a6b9e719cc/example-application/test/docker-compose.yml#L1
	https://github.com/testjavascript/nodejs-integration-tests-best-practices#️-4-test-processing-of-messages-batch
Full code here	https://github.com/testjavascript/nodejs-integration-tests-best-practices/blob/fb93b498d437aa6d0469485e648e74a6b9e719cc/example-application/test/docker-compose.yml#L1
	https://github.com/testjavascript/nodejs-integration-tests-best-practices#️-5-test-for-poisoned-messages
Full code here	https://github.com/testjavascript/nodejs-integration-tests-best-practices/blob/fb93b498d437aa6d0469485e648e74a6b9e719cc/example-application/test/docker-compose.yml#L1
	https://github.com/testjavascript/nodejs-integration-tests-best-practices#️-6-test-for-idempotency
Full code here	https://github.com/testjavascript/nodejs-integration-tests-best-practices/blob/fb93b498d437aa6d0469485e648e74a6b9e719cc/example-application/test/docker-compose.yml#L1
	https://github.com/testjavascript/nodejs-integration-tests-best-practices#️-7-avoid-a-zombie-process-by-testing-connection-failures
Full code here	https://github.com/testjavascript/nodejs-integration-tests-best-practices/blob/fb93b498d437aa6d0469485e648e74a6b9e719cc/example-application/test/docker-compose.yml#L1
	https://github.com/testjavascript/nodejs-integration-tests-best-practices#️-8-top-of-development-testing-write-a-few-e2e-tests
Full code here	https://github.com/testjavascript/nodejs-integration-tests-best-practices/blob/fb93b498d437aa6d0469485e648e74a6b9e719cc/example-application/test/docker-compose.yml#L1
	https://github.com/testjavascript/nodejs-integration-tests-best-practices#section-8-mocking
	https://github.com/testjavascript/nodejs-integration-tests-best-practices#️-1-spot-the-good-mocks-from-the-evil-ones
	https://github.com/testjavascript/nodejs-integration-tests-best-practices#the-formula-for-a-bad-mock
	https://github.com/testjavascript/nodejs-integration-tests-best-practices#️-2-avoid-hidden-surprising-mocks
	https://github.com/testjavascript/nodejs-integration-tests-best-practices#️-3-be-mindful-about-partial-mocks
	https://github.com/testjavascript/nodejs-integration-tests-best-practices#️-4-clean-up-all-mocks-before-every-test
	https://github.com/testjavascript/nodejs-integration-tests-best-practices#️-5-be-mindful-about-the-mocking-mechanism
Sinon	https://sinonjs.org/
	https://github.com/testjavascript/nodejs-integration-tests-best-practices#understanding-the-trade-offs
live bindings	https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Statements/import
	https://github.com/testjavascript/nodejs-integration-tests-best-practices#which-one-should-you-use
	https://github.com/testjavascript/nodejs-integration-tests-best-practices#️-6-type-your-mocks
Full code here	https://github.com/testjavascript/integration-tests-a-z/blob/4c76cb2e2202e6c1184d1659bf1a2843db3044e4/example-application/entry-points/api-under-test.js#L10-L34
	https://github.com/testjavascript/nodejs-integration-tests-best-practices#-example-application
	https://github.com/testjavascript/nodejs-integration-tests-best-practices#-recipes
Nest.js	https://github.com/testjavascript/nodejs-integration-tests-best-practices/tree/master/recipes/nestjs
Mocha	https://github.com/testjavascript/nodejs-integration-tests-best-practices/tree/master/recipes/mocha
Authentication	https://github.com/testjavascript/nodejs-integration-tests-best-practices/tree/master/recipes/authentication
Message Queue	https://github.com/testjavascript/nodejs-integration-tests-best-practices/tree/master/recipes/message-queue
Testing OpenAPI (Swagger)	https://github.com/testjavascript/nodejs-integration-tests-best-practices/tree/master/recipes/doc-driven-contract-test
Data isolation patterns	https://github.com/testjavascript/nodejs-integration-tests-best-practices/tree/master/recipes/data-isolation
Optimized DB for testing	https://github.com/testjavascript/nodejs-integration-tests-best-practices/tree/master/recipes/db-optimization
Error handling	https://github.com/testjavascript/nodejs-integration-tests-best-practices/tree/master/recipes/error-handling
Performance	https://github.com/testjavascript/nodejs-integration-tests-best-practices/tree/master/recipes/performance
	https://github.com/testjavascript/nodejs-integration-tests-best-practices#the-team
	https://github.com/goldbergyoni/nodejs-testing-best-practices/blob/master/graphics/team/yoni.jpg
	https://github.com/testjavascript/nodejs-integration-tests-best-practices#yoni-goldberg
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	https://www.linkedin.com/in/michael-solomon-b3571a97/
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	https://github.com/testjavascript/nodejs-integration-tests-best-practices#daniel-gluskin
nodejs	https://github.com/topics/nodejs
javascript	https://github.com/topics/javascript
testing	https://github.com/topics/testing
express	https://github.com/topics/express
microservices	https://github.com/topics/microservices
database	https://github.com/topics/database
rest	https://github.com/topics/rest
mocha	https://github.com/topics/mocha
backend	https://github.com/topics/backend
jest	https://github.com/topics/jest
best-practices	https://github.com/topics/best-practices
integration-testing	https://github.com/topics/integration-testing
message-queue	https://github.com/topics/message-queue
fastify	https://github.com/topics/fastify
component-testing	https://github.com/topics/component-testing
nestjs	https://github.com/topics/nestjs
Readme	https://github.com/testjavascript/nodejs-integration-tests-best-practices#readme-ov-file
Contributing	https://github.com/testjavascript/nodejs-integration-tests-best-practices#contributing-ov-file
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