Clojurians Log v2
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polylith 2026-07-15
hlship 2026-07-15T16:08:07.851599Z
Say I have component A that makes use of component B, and I have B-production and B-mock (for testing). Does it make sense for A to have a :dev dependency on B-mock for use in unit tests, or does all cross-component testing need to be inside a project? And, if so, are some projects just about testing and not artifacts?
seancorfield 2026-07-15T16:25:53.061279Z
This is what profiles are for.
seancorfield 2026-07-15T16:28:09.512799Z
Components never depend on each (in deps.edn files). Only projects (including development) specify those dependencies.
seancorfield 2026-07-15T16:30:04.747439Z
Example from our work monorepo:
:+default {:extra-deps {;; by default, we use the real i18n and web server:
poly/i18n {:local/root "components/i18n"}}
:extra-paths ["components/i18n/test"]}
:+preview {:extra-deps {;; or the preview i18n and the real web server:
poly/i18n {:local/root "components/i18n-preview"}}
:extra-paths ["components/i18n-preview/test"]}hlship 2026-07-15T16:08:34.410029Z
Alternately, do you do mocking via with-redefs on the functions called in the interface?
seancorfield 2026-07-15T16:30:31.007579Z
Yes, we sometimes mock with-redefs (for all its many faults).
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