Increase slash, at-command, and path completion coverage (Fixes #2019) - #3374
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Included review availability: Your plan provides up to 4 included reviews per hour; 1 remains after this review. 📝 WalkthroughWalkthroughThe PR adds tests for completion keyboard behavior, suggestion rendering, filesystem matching, path escaping, and recovery after initialization errors. ChangesCompletion coverage
Estimated code review effort: 3 (Moderate) | ~25 minutes Merge Risk: ⚪ Minimal · up to This PR adds completion behavior tests without changing production code, so no actionable merge-blocking risk remains beyond normal checks and review. 🚥 Pre-merge checks | ✅ 4 | ❌ 1❌ Failed checks (1 warning)
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Full details: Linked Issues checkExplanation The test changes support issue Full details: Out of Scope Changes checkExplanation The changes are limited to completion-related tests and the associated plan documentation. No unrelated production changes are present. The same-directory recovery bug is explicitly excluded and tracked in ✨ Finishing Touches 💡 1📝 Generate docstrings 💡
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WalkthroughBefore this PR, slash commands, @-mentions, and file-path completion were only partially covered by UI and hook tests. That left several user-visible behaviors unverified: how completion suggestions are accepted or dismissed, whether hidden or spaced filenames are handled correctly, how recursive discovery ranks results, whether Unicode input is rendered safely, and whether the completion machinery recovers cleanly when the working directory changes. After this PR, those areas are exercised by targeted tests in InputPrompt, SuggestionsDisplay, and the at-completion hooks, so regressions in suggestion display, dotfile filtering, recursive search, Unicode handling, and cwd-change recovery are caught earlier. Release NotesBug Fixes
Tests
Documentation
Changes
Magnitude🎯 1 (S) Related
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Walkthrough generated by LLxprt PR Review. Planner issue: #2256 |
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In `@packages/cli/src/ui/hooks/useAtCompletion.test.ts`:
- Around line 370-390: Strengthen the test around FileSearchFactory.create so it
verifies the projectRoot/cwd passed during initialization: assert failedCwd is
used before recovery and recoveredCwd after rerender, or return distinct fakes
keyed by projectRoot. Update the mock setup and assertions near realFileSearch
and the create spy without changing unrelated behavior.
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project-plans/issue2019-completion-coverage.mdis excluded by!project-plans/**
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packages/cli/src/ui/components/InputPrompt.completion.test.tsxpackages/cli/src/ui/components/SuggestionsDisplay.test.tsxpackages/cli/src/ui/hooks/atCompletionUtils.test.tspackages/cli/src/ui/hooks/useAtCompletion.test.ts
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Thanks — three review findings, two fixed and one declined with evidence. All addressed in 251db25. Fixed: the cwd-recovery test could not detect the wrong directory (CodeRabbit, Correct, and the weakness was worse than the comment suggests. Rather than assert on the factory's call arguments, I made the fake behavioral: each call now builds its delegate from the Fixed: the Also correct. Declined: mutating The stated risk is "under parallel test execution, other tests in the same process can observe the modified level". That does not apply to this repo's runner, on two independent counts:
The mutation is also already restored in a On the suggested alternative: |
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Good catch on the global counter — fixed in 2eb2f58. The failure mode was subtle and worth spelling out. The counter threw only on the first Failure is now keyed to initialize: vi.fn(async () => {
if (options.projectRoot === failedCwd) {
throw new Error('Initialization failed');
}
return realFileSearch.initialize();
}),This also reads closer to the intent — initialization fails for that directory, and succeeds for the recovered one — rather than depending on how many times the hook happens to call it. Mutation check re-run after the rework, and the oracle still holds. Pointing the delegate back at the failed root fails the test, and reverting passes it: |
Adds behavioral coverage for the completion subsystem's untested branches. No production source changes. An audit of the existing suites first established what was already pinned on main so nothing here duplicates it: slash filtering and no-result behavior, Enter/Tab acceptance at an explicit index, the isPerfectMatch short-circuit, at-command debounce and cancellation, the 200ms loading indicator, gitignore and llxprtignore filtering, and most special-character escaping were all already covered. The gaps that remained are what this commit fills. SuggestionsDisplay had only three tests, all for the [Subagent] badge. Its render contract is now pinned: the loading branch, the empty-to-null transition, scroll markers, the eight-row window, counter gating at the MAX_SUGGESTIONS_TO_SHOW boundary, descriptions paired with their labels, slash-mode column alignment versus non-slash inline layout, the activeHint line, and the active-row highlight. The highlight test raises chalk.level to 3 and restores it, because the test process defaults to level 0 and strips colour. Without that, active and inactive rows are textually identical and no assertion could fail. InputPrompt covers the activeSuggestionIndex === -1 fallback to index 0 for both Tab and Enter, which no existing test exercised, and distinguishes Escape dismissal from acceptance by asserting the buffer is unchanged and nothing was accepted. atCompletionUtils had no test file. Its dotfile rule is now pinned in both directions against a real temp directory, along with case-insensitive prefix matching and the surfacing and escaping of quote and unicode filenames. Every new assertion was mutation-checked: making the component return null, equalising the row colours, flipping the -1 fallback to 1, and inverting the dotfile predicate each fail exactly the tests that claim to cover them. Scope note: at-command error recovery is covered only for the cwd-change path. A same-directory retry cannot recover because usePatternChangeHandler has no ERROR transition, which is a production bug filed as #3373 rather than frozen into a test here.
The cwd-recovery test built its delegate searcher against recoveredCwd up front and stubbed the factory with mockReturnValue, which ignores arguments. It would therefore have passed even if the hook re-initialized against the failed directory. The fake is now built per call from the projectRoot the hook actually requested, so recovery is proven by the suggestions themselves. Verified: forcing the delegate back to the failed root now fails the test. The active-row colour test resolved its rows with a `?? ''` fallback, so the negative assertion held vacuously if the inactive row never rendered. Both rows are now asserted to exist first.
The counter-based fake threw only on the first initialize call across all instances. Had the hook initialized the failed root more than once, the second call would have succeeded against a directory with no matching files, leaving the suggestions empty and the assertions still passing while the hook was in READY rather than ERROR. The test would have quietly stopped covering error recovery. Failure is now keyed to projectRoot, so the failed root fails however many times it is initialized. Mutation check still holds: pointing the delegate back at the failed root fails the test.
1 participant
TLDR
Adds behavioral test coverage for the completion subsystem's untested branches. Zero production source changes —
git diffagainstmaintouches only test files and one plan document.Before writing anything, I audited the existing suites to establish what was already pinned on
main, so nothing here duplicates existing coverage. Slash filtering and no-result behavior, Enter/Tab acceptance at an explicit index, theisPerfectMatchshort-circuit, at-command debounce and cancellation, the 200ms loading indicator, gitignore/llxprtignore filtering, and most special-character escaping were already covered. This PR fills the gaps that remained.Reviewers should look hardest at two things: the
chalk.levelmanipulation in the highlight test (explained below), and the scope note about at-command error recovery.Dive Deeper
SuggestionsDisplayrender contractThe component had three tests, all for the
[Subagent]badge. Everything else about its rendering was unasserted. Now pinned: the loading branch, the empty-to-nulltransition, scroll markers, the eight-row window, counter gating at theMAX_SUGGESTIONS_TO_SHOWboundary, descriptions paired with their labels, slash-mode column alignment versus non-slash inline layout, theactiveHintline, and the active-row highlight.The highlight test raises
chalk.levelto 3 and restores it in afinally. This is worth explaining because it looks odd. My first probe ofink-testing-libraryreturned plain text with no ANSI, which suggested the highlight was simply unobservable and should not be tested. That was wrong: the default chalk level in the test process is 0, which strips colour. At level 3 the active row carries38;2;0;255;0and inactive rows carry the theme foreground. Without raising the level, active and inactive rows are textually identical and no assertion could fail, so the test would have been theatre.The boundary cases are pinned explicitly rather than sampled: exactly 8 suggestions produces no counter and no down marker, 9 produces both, and the last scroll window produces an up marker and no down marker.
InputPromptacceptance and dismissalacceptCompletionSuggestionfalls back to index 0 whenactiveSuggestionIndexis-1. Every existing acceptance test set the index to 0 or 1, so that branch was never exercised. Both Tab and Enter now cover it.The Enter test waits
FAST_RETURN_TIMEOUT + 10ms before writing\r, becauseKeypressContextreclassifies a fast-arriving Return as pasted text rather than submit. Without the wait the test would pass through a different code path than the one it claims to test.Escape dismissal is now distinguished from acceptance: the buffer text is unchanged, nothing was accepted, and the prompt was not submitted. The pre-existing Escape test asserted only that reset was called.
atCompletionUtilsThis module had no test file at all. Its dotfile rule is now pinned in both directions against a real temp directory — hidden entries are excluded unless the typed prefix itself starts with
., and thehprefix case proves the rule keys on the prefix rather than on a name match. Also covered: case-insensitive prefix matching, and the surfacing and escaping of quote and unicode filenames, which are inSHELL_SPECIAL_CHARSbut appeared in no fixture.Every assertion was mutation-checked
Rather than trusting that the tests are meaningful, each was verified to fail for the right reason by temporarily breaking production code and reverting:
SuggestionsDisplayalways returnsnullactiveSuggestionIndex === -1 ? 1instead of? 0All production files are byte-identical to
mainin the final state.Scope note: at-command error recovery
The issue asks for error-recovery coverage. Recovery only works when
cwdchanges. A same-directory retry cannot recover, becauseusePatternChangeHandlertransitions only fromIDLE,READY, andSEARCHING—ERRORis absent, so a new pattern dispatches nothing. Verified by probe: after entering the error state, changing only the pattern produced no newFileSearchFactory.createand no suggestions.That is a production bug, not a coverage gap, so it is filed as #3373 rather than fixed here or frozen into a passing test. The test added covers the recovery path that actually exists and is named for it.
Two other pre-existing issues found and reported, not fixed
@path(useAtCompletion) shows dotfiles for an empty prefix, while@pathinside a slash-command line (slashCompletionEffect) hides them. Both behaviors are already frozen in passing tests onmain. The new tests target theatCompletionUtilsrule only and do not contradict or entrench either side.scripts/tmux-script.github-at-completion.llxprt.jsonis git-tracked but referenced by no test, workflow, or doc, and hits a live GitHub broker.On the tmux smoke test
The issue says to keep one or two tmux smoke tests for real keyboard behavior.
tmux-script.slash-autocomplete.jsonalready runs in theinteractive-uiCI lane and covers opening, filtering, arrow navigation, the counter, and Escape dismissal through real keystrokes. Adding a second scenario would require editing the workflow's path filters plus the contract test that pins "the three executed scenario JSON files", so it was not done unilaterally. The issue also directs that most coverage be hook and component tests, which is what this PR delivers.Reviewer Test Plan
Confirm nothing in production changed:
Run the touched suites (from
packages/cli, since running from the repo root suffix-matches an unrelatedresearch/gemini-clicopy):To confirm the tests are not theatre, reproduce any row of the mutation table. The quickest is to make
SuggestionsDisplayreturnnullimmediately and watch the three negative-branch tests fail, or flip=== -1 ? 0to? 1ininputPromptKeyHandlers.tsand watch the Tab and Enter tests fail.Interactively, the covered behaviors are: type
/and check the menu, counter, and Escape dismissal; type@in a directory containing hidden files and confirm they stay hidden until you type a leading.; press Tab with the menu open but nothing arrow-selected and confirm the first suggestion is accepted rather than nothing happening.Testing Matrix
Verified locally on macOS:
npm run test,npm run lint,npm run typecheck,npm run format, andnpm run buildall pass. The startup smoke test passes.bun scripts/test-audit/scan.tsreports noMOCK_MIRROR,ALWAYS_TRUE,SELF_CONFIRMING, orNO_ASSERTfindings on the touched files. Open Code Review returned 0 findings across all 4 files.This is a test-only change with no production diff, so platform-specific runtime behavior is not affected. The filename fixtures (quotes, unicode) are created on the local filesystem and all succeeded on darwin; Linux CI will confirm portability.
Linked issues / bugs
Fixes #2019
Filed while working on this, deliberately out of scope: #3373 (at-command completion cannot recover from a transient search error while typing).
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