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test(git): pin show --end-of-options blob reads in the compat matrix

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The pinned SSH branch diff makes `show --end-of-options <oid>:<path>` the
only Git command on that path, and depends on it resolving against the
named commit rather than live HEAD, and on failing for a path absent at
that commit — that failure is what renders additions and deletions.

Co-authored-by: Orca <help@stably.ai>
This commit is contained in:
Neil
2026-08-11 00:05:03 -07:00
co-authored by Orca
parent 321e932142
commit cfb88da1b2
1 changed files with 21 additions and 0 deletions
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src/shared/git-binary-compatibility.test.ts
+21
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@@ -226,4 +226,25 @@ describeBinaryCompatibility('real Git binary compatibility', () => {
expect(lines[0]).toBe('--end-of-options')
expect(lines.find((line) => line !== '--end-of-options')).toMatch(/^refs\//)
})
// Why pin this: `show --end-of-options <oid>:<path>` is the only Git command on the
// pinned SSH branch-diff path, and both blob sides depend on it resolving against the
// named commit rather than live HEAD, and on failing (not falling back) for a path
// absent at that commit — that failure is what renders additions and deletions.
it('reads a blob at a pinned object id', async () => {
await writeFile(join(repoPath, 'pinned.txt'), 'pinned\n')
await runGit(['add', 'pinned.txt'])
await runGit(['commit', '-qm', 'pinned'])
const pinnedOid = (await runGit(['rev-parse', 'HEAD'])).stdout.trim()
await writeFile(join(repoPath, 'pinned.txt'), 'moved on\n')
await runGit(['commit', '-qam', 'after pinned'])
await expect(
runGit(['show', '--end-of-options', `${pinnedOid}:pinned.txt`])
).resolves.toMatchObject({ stdout: 'pinned\n' })
await expect(
runGit(['show', '--end-of-options', `${pinnedOid}:absent.txt`])
).rejects.toBeDefined()
})
})