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fix(frontend): render the Coverage bar column (closes #1777) - #1864
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buildServiceRow() has always built div.coverage-bar > div.coverage-bar-fill with the fill width set inline from coverage_pct, but no stylesheet ever defined those classes. Both divs resolved to height 0 with no background, so every cell in the column painted blank while the numeric Coverage % beside it was correct. jsdom does not resolve stylesheets into layout, so the existing jest suite asserted the markup and stayed green throughout. The regression test is a Playwright spec that measures what Chromium paints (box height, background colour, fill width as a fraction of the track) across the boundaries: 100%, a fractional value, 0%, and a service with no coverage figure at all. A null coverage_pct now renders an explicit N/A placeholder instead of an empty cell. Absent is not zero, and a blank cell was indistinguishable from the defect above. The bar also carries role=img and an aria-label with its percentage, since it holds no text of its own.
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📝 WalkthroughWalkthroughThe coverage column now renders styled bars for measured values and ChangesCoverage bar rendering
Estimated code review effort: 3 (Moderate) | ~20 minutes Merge Risk: 🔵 Low · up to The PR fixes the Coverage bar rendering and adds verification, but frontend/src/inventory.ts exceeds the repository’s 500-line guideline; it is mergeable with explicit owner follow-up to extract the coverage-rendering helper. Possibly related PRs
🚥 Pre-merge checks | ✅ 4 | ❌ 1❌ Failed checks (1 warning)
✅ Passed checks (4 passed)
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In `@frontend/src/inventory.ts`:
- Around line 497-514: Extract the cohesive coverage-rendering logic around the
coverage bar and absent-value handling from the inventory rendering flow into an
existing module, then update the caller to use that helper. Preserve the ARIA
label, percentage clamping, fill styling, and N/A behavior while reducing
frontend/src/inventory.ts below 500 lines.
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📒 Files selected for processing (5)
frontend/src/__tests__/inventory.test.tsfrontend/src/inventory.tsfrontend/src/styles/tables.cssfrontend/tests-e2e/coverage-bar.spec.tsfrontend/tests-e2e/fixtures/recs.ts
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… savings figure (#1868) Upcoming Scheduled Purchases actions collided with the savings figure On Home, the View Details and Cancel buttons rendered flush against the "$0 Est. monthly savings" text. Measured in Chromium across a 1600px to 320px sweep in 20px steps with three fixture rows, which showed the report describes two distinct defects rather than one: The savings-to-actions collision is width- and content-dependent. It appears from roughly 780px to 1024px with a realistic plan name, and at any width once a row's content is long enough; rows with short plan names never collide. The button-to-button collision is genuinely at every width, including 1600px, where View Details and Cancel share an edge with exactly 0px between them. There is no z-order overlap anywhere. Overlapping area measures 0 at every width and every fixture row, checked per text node with Range.getClientRects() and cross-checked that no global word-break or overflow-wrap rule defeats flexbox min-width: auto. What a user sees is zero separation: bold green text sharing a pixel boundary with a solid button reads as an overlap. Worth knowing before comparing this diff against the issue's wording, since the fix adds space rather than correcting a stacking order. Root cause is the same shape as #1777: the markup was correct and the stylesheet was not. .upcoming-actions had no rule at all, so its buttons laid out edge to edge, and space-between alone leaves zero separation once the three blocks fill the row. Three declarations, all built from existing design tokens: a gap on the card, flex-shrink: 0 on the savings block so a long plan name squeezes the info block rather than wrapping the label into the buttons, and a flex row with a gap for the actions. A fourth declaration was found to guard an unreachable state and removed before commit. Verified by a Playwright spec measuring rendered geometry, because jsdom does not resolve stylesheets into layout and a jest test cannot observe an overlap at all. It asserts both no-overlap and a minimum gap, fails 3 of 4 pre-fix and passes 4 of 4 after. The one spec that passes in both states is a deliberate non-vacuity guard asserting the fixture renders two buttons per row, so a fixture regression cannot make the spacing assertions pass trivially. Confirmed in CI that Run Playwright tests executed rather than being skipped. One spec bug was found and fixed during the work: the label line-count assertion used Element.getClientRects().length, which returns a single rect for a block box regardless of how many lines the text wraps to, so it passed pre-fix and proved nothing. It now uses a Range over the label's contents and fails pre-fix. CodeRabbit never reviewed this pull request. Its included allowance was exhausted before the PR was opened, an explicit full review request was also throttled, and roughly two and a half hours across several windows produced only rate-limit notices. The entire production diff, 14 lines in one stylesheet, was therefore reviewed by hand rather than a delta on top of an earlier verdict. CI is green on all six runs with zero unresolved threads. Deferred: #1869 covers Frontend E2E hanging on Install Chromium and being killed by the job timeout, which skipped every spec on three attempts here and three on #1864; the run reports as cancelled rather than failed, so a denylist-based green check reads it as passing. #1865 covers the fourteen frontend files over the 500-line ceiling.
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Closes #1777
At Inventory & Coverage -> Coverage, the "Coverage bar" column rendered empty cells for every row while the numeric Coverage % beside it was correct.
Root cause: the CSS for the bar never existed
The markup was always correct.
buildServiceRow()infrontend/src/inventory.tshas always builttd.coverage-bar-cell > div.coverage-bar > div.coverage-bar-fill, with the fill width set inline fromcoverage_pctand clamped to[0, 100]. No stylesheet anywhere in the repo defined those three classes, so both divs resolved toheight: 0with no background and painted nothing.The evidence, in the order that established it:
Reading the renderer ruled out two of the four candidate causes on its own: the data is present and the field name matches, so this is neither missing data nor a renamed field.
Grepping the class names across every
.css,.htmland.tsin the repo returned exactly one file,inventory.tsitself:A column whose classes appear only in the code that builds them, and nowhere in the styles, is unstyled rather than vestigial. That grep is what rules out "the column is left over from a removed feature", which would have made deleting it the correct outcome.
Confirmed by measurement rather than by reasoning: in Chromium the track's
getBoundingClientRect().heightis0.This is not fallout from the routing work in #1854. These classes have been unstyled since the column was introduced in #754. The route resolves correctly; the blank column reproduces once you are on the page by any means.
Why the existing tests never caught it
jsdom does not resolve stylesheets into layout.
frontend/src/__tests__/inventory.test.tsasserts the DOM structure and the headeraria-label, and stayed green for the entire life of the bug. Jest is structurally incapable of catching this class of defect, which is why the regression test added here is a Playwright spec that measures what Chromium actually paints (box height, computed background colour, and fill width as a fraction of the track) rather than what the DOM contains.Against the pre-fix bundle it fails on the defect itself:
Post-fix: 4 passed. It runs on the existing hermetic e2e harness (production webpack bundle served by
npx serve -s dist, API mocked viapage.route), so it costs no live account and no backend boot.Absent is not zero
A
nullcoverage_pctnow renders no track at all plus a mutedN/A, not a zero-width bar. A 0% bar asserts that the answer is known to be zero, which is a different claim from "we have no usage signal for this service". The two are visually distinct: a genuine 0% row shows the empty grey rail, a null row shows no rail.Previously a null row left the cell entirely blank, which was indistinguishable from the bug being addressed here.
Verified
coverage_pct10062.50nullN/ARun from
frontend/on this branch:npm test-> 2858 passed, 1 skipped, 90 suitesnpm run build-> exit 0npm run lint-> exit 0 (125 warnings, all pre-existingno-explicit-anyin files this PR does not touch)npx playwright test-> 32 passed (the full e2e suite, confirming the sharedrecs.tsfixture change does not disturb the existing deeplink and recommendations specs)The bar also gains
role="img"and anaria-labelcarrying its percentage, since it holds no text of its own and the column header already carries a deliberate screen-reader label.XSS posture unchanged: this path uses
textContentandcreateElementthroughout, neverinnerHTML. The only API-derived value reaching an attribute iscoverage_pct.toFixed(1), numeric by type.Scope
.coverage-provider-card,.coverage-overall-badgeand.coverage-service-tableare also unstyled, but they inherit usable styling from the generic.cardandtablerules and render correctly. Styling them is out of scope here.Not verified
playwright.config.ts.responsive.cssbreakpoints.prefers-color-schemehandling anywhere infrontend/src/styles/.Summary by CodeRabbit
New Features
Bug Fixes
Tests