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test: re-enable a few more passing NFT unit cases - #97017

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mischnic merged 3 commits into
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mischnic:turbopack-tracing-unenable-unit-tests
Aug 11, 2026
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test: re-enable a few more passing NFT unit cases#97017
mischnic merged 3 commits into
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mischnic:turbopack-tracing-unenable-unit-tests

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@mischnic mischnic commented Aug 10, 2026

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Enable the skipped cases in turbopack-tracing's unit.rs that pass as-is today, and document why a few of the remaining ones cannot pass with this harness.

Enable the skipped cases in turbopack-tracing's unit.rs that pass as-is
today, and document why a few of the remaining ones cannot pass with
this harness.

Verified by temporarily enabling all 84 skipped cases and running the
suite (with and without the fixture workspace installed): 13 pass. The
suite goes from 68 to 81 cases.

Co-authored-by: Niklas Mischkulnig <4586894+mischnic@users.noreply.github.com>
@mischnic mischnic changed the title test(turbopack-tracing): re-enable 13 passing node-file-trace unit cases test: re-enable a few more passing NFT unit cases Aug 10, 2026
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Tests Passed

Commit: 5d89922

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Stats from current PR

🟢 1 improvement

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📦 Production Builds (Webpack)

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  • pages-turbo...time.prod.js
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📎 Tarball URL
https://vercel-packages.vercel.app/next/commits/5d89922da288b1b2ddc8378ee19268a09786ffb9/next

Commit: 5d89922

@mischnic
mischnic requested a review from a team August 10, 2026 09:33
…ions

The Rust unit harness is a port of tests/node-file-trace/unit.test.js but
ignored three things the JS harness passes, so some cases could never
pass regardless of what Turbopack traced:

- the `paths` mappings for the `esm-paths*` fixtures, now wired in as an
  import map
- multiple entry points (`multi-input` traces four), now unioned
- the `conditions` from a fixture's `test-opts.json`, now mapped onto
  `custom_conditions` (plus `browser` package-field remapping)

Enables esm-paths, esm-paths-trailer and multi-input.

browser-remappings-false and browser-remappings-string are disabled
again: they only passed while their `browser` condition was ignored.
With it honored, all browser-remappings cases fail for one shared
reason, now documented: nft's reference output lists every candidate
resolution (`main` next to the `exports`/`browser` target, and even a
`browser` mapping disabled with `false`), while Turbopack only traces
what it resolves to.

Co-authored-by: Niklas Mischkulnig <4586894+mischnic@users.noreply.github.com>
@mischnic
mischnic merged commit 9ae95b8 into vercel:canary Aug 11, 2026
103 checks passed
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