28 lines
1.6 KiB
Markdown
28 lines
1.6 KiB
Markdown
# Design decisions
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`womm` mostly shadows the API of other test runners out there with a few quirks. This document records choices made
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along the way and the reasoning behind them.
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## No production dependencies
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I believe that the NodeJS ecosystem is too trigger-happy with `npm install` and `yarn add`. Even basic applications
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quickly end up requiring tens of packages to be shipped to users. A lot of those packages being maintained (or not) by
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the community, this means that ensuring that the downstream dependency of a project can quickly become a major concern.
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The best way to ensure that things are becoming stale is to depend on less, and depending on nothing than the standard
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library is best.
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_Some exceptions apply here. Development tooling is easier to handle, but should still be heavily vetted. For this
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reason, `womm` has a few dev-facing dependencies, but those are carefully-chosen to make sure that the cost of having
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them doesn't outweigh what they bring to the table._
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## No snapshot matchers
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Snapshot testing is rarely used well. In a lot of cases, it's a crutch used to avoid writing more precise assertions
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about software behaviour. This is especially true in browser-facing code where component snapshots clutter codebases and
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provide very little confidence that code is healthy -- instead, it measures whether it changed or evolved, and expects
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whoever _reads_ the test to validate snapshot contents manually.
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Snapshot matchers are not included out-of-the-box in `womm` to promote better practices around test quality and to
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remove a foot-gun from the tooling.
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