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test(e2e): capture viewport and grid screenshots text-free across the suite - #6296
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jbocce merged 20 commits intoOct 6, 2026
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- Updated multiple screenshot files in various test specifications to reflect changes in UI rendering. - Added a new utility function `checkForGridScreenshot` to handle grid-scoped screenshot comparisons, including text visibility management during captures. - Enhanced the existing `checkForScreenshot` function to include a settling mechanism for baseline captures, ensuring accurate screenshot comparisons.
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Included review availability: This review used your included allowance. Your plan provides up to 8 included reviews per hour; 7 remain after this review. 📝 WalkthroughWalkthroughThe change adds grid-specific screenshot handling that hides viewport text during capture. Playwright tests now use viewport- or grid-specific helpers. Several tests replace fixed delays with render waits and add targeted measurement, overlay, and navigation assertions. ChangesScreenshot capture utilities and guidance
Screenshot test migration
Priority: ➖ Normal Estimated code review effort: 3 (Moderate) | ~20 minutes Change: Other Suggested reviewers: Merge Risk: ⚪ Minimal · up to The previously raised baseline concerns are not changes introduced by this PR, and the misleading screenshot example has been corrected. No actionable merge-blocking risk remains after normal checks. 🚥 Pre-merge checks | ✅ 5✅ Passed checks (5 passed)
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Inline comments:
In @.agents/skills/ohif-test-agent/references/utilities.md:
- Around line 68-69: Update the grid screenshot example to call
checkForGridScreenshot with page, viewportPageObject, and screenshotPath instead
of passing viewportPageObject.grid to raw checkForScreenshot.
In `@tests/utils/checkForScreenshot.ts`:
- Line 118: Update the isUpdatingBaselines decision in checkForScreenshot to
settle captures when updateSnapshots is 'missing' and no baseline exists;
preserve the no-extra-wait behavior when a baseline already exists.
- Line 92: Update the screenshot flow around waitForViewportsRendered to skip
the render wait when the page has no viewports, proceeding directly to capture;
retain the existing wait for pages that have viewports.
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📒 Files selected for processing (48)
.agents/skills/ohif-test-agent/SKILL.md.agents/skills/ohif-test-agent/references/utilities.mdtests/3DFourUp.spec.tstests/3DMain.spec.tstests/3DOnly.spec.tstests/3DPrimary.spec.tstests/AxialPrimary.spec.tstests/CONTRIBUTING.mdtests/ContextMenu.spec.tstests/ContourCombineOperations.spec.tstests/FlipHorizontal.spec.tstests/Invert.spec.tstests/JumpToMeasurementMPR.spec.tstests/LabelMapSegLocking.spec.tstests/Livewire.spec.tstests/MPR.spec.tstests/MPRThenRTOverlayNoHydration.spec.tstests/MPRThenSEGOverlayNoHydration.spec.tstests/MultipleSegmentationDataOverlays.spec.tstests/OverlappingSegmentationRendering.spec.tstests/RTDataOverlayForUnreferencedDisplaySetNoHydration.spec.tstests/RTHydration.spec.tstests/RTHydration2.spec.tstests/RTHydrationDisableConfirmation.spec.tstests/RTHydrationFromMPR.spec.tstests/RTHydrationThenMPR.spec.tstests/RTNoHydrationThenMPR.spec.tstests/Reset.spec.tstests/RotateRight.spec.tstests/SEGDataOverlayForUnreferencedDisplaySetNoHydration.spec.tstests/SEGDataOverlayNoHydrationThenMPR.spec.tstests/SEGDrawingToolsResizing.spec.tstests/SEGHydration.spec.tstests/SEGHydrationDeleteAndReload.spec.tstests/SEGHydrationFrom3DFourUp.spec.tstests/SEGHydrationFromMPR.spec.tstests/SEGHydrationThenMPR.spec.tstests/SEGNoHydrationThenMPR.spec.tstests/SRHydration.spec.tstests/Scoord3dProbe.spec.tstests/ScoordRectangle.spec.tstests/Spline.spec.tstests/WSI.spec.tstests/mpr2.spec.tstests/pages/ViewportPageObject.tstests/utils/checkForGridScreenshot.tstests/utils/checkForScreenshot.tstests/utils/index.ts
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| // await checkForViewportScreenshot({ | ||
| // page, | ||
| // locator: viewportPageObject.grid, | ||
| // viewport, |
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Is it worth having an example for the grid screenshot?
jbocce
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Sep 30, 2026
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| - **Use the object form.** The positional form is legacy; don't introduce it in new code, and don't treat existing positional-form usage as a pattern to copy. | ||
| - **No text in baselines.** Overlay text (date, series description, W/L, slice index) drifts with data, locale, and font rendering, so a baseline that contains it is fragile — new viewport baselines must be text-free. Capture viewports through `checkForViewportScreenshot`, which hides all viewport text for the shot; a raw `checkForScreenshot` on a viewport pane bakes the text in. | ||
| - **No text in baselines.** Overlay text (date, series description, W/L, slice index) drifts with data, locale, and font rendering, so a baseline that contains it is fragile — new viewport baselines must be text-free. Capture a viewport through `checkForViewportScreenshot` and the grid through `checkForGridScreenshot`, which hide all viewport text for the shot; a raw `checkForScreenshot` on a viewport pane or the grid bakes the text in. |
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There is this continuous reference to "bakes the text in". That really isn't 100% accurate, checkForScreenshot simply leaves what is in the viewport as is - not text hiding or any other manipulation. For example, there is nothing stopping someone from first hiding the text and then calling checkForScreenshot. If anything changing the "bakes the text in" to something like "leaves the viewport (grid) untouched before and after the screenshot" or something.
jbocce
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Sep 30, 2026
| /** | ||
| * Hides all viewport text (overlays, annotations, orientation markers) in one sweep. | ||
| */ | ||
| async hideAllViewportsText(): Promise<void> { |
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The names of this and the method below are a little awkward - in particular because it is a plural. So use either...
hideAllViewportTexthideAllTextbecause since this is a method of the viewport page object it is not critical to include the viewport word
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Hold on, I just realized that this applies to the grid. So maybe the names should be hideAllViewportGridText and showAllViewportGridText.
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Renamed to hideAllViewportGridText / showAllViewportGridText.
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Sep 30, 2026
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This one is a bit unexpected. There was no text before and the after is on a totally different image/frame that the before. Please check this.
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Good catch, reverted to the old baseline
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Sep 30, 2026
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The two for tests/screenshots/chromium/MultipleSegmentationDataOverlays.spec.ts are a little funny. It looks like the test might have been trying to assert the contents of the overlay menu via screenshot. This too falls under the text category. However I don't this is cause for adding yet another "text" to turn off prior to taking the viewport screenshots. Instead maybe in the test(s) close the overlay menus prior to taking the screenshot. Furthermore maybe assert the contents of each overlay menu in the test if it is not already being done so already.
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Updated to close the overlay menu before each capture and assert its rows contents
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Here is another one with "text" in the viewport from the hydrate "badge". Not sure how to handle this one - we might need to look at the test first. This one might have to stay and if we ever lower the diff tolerance, this one might need a higher tolerance.
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The hydration prompt is now hidden when capturing, so this and the other pre-hydration baselines are text-free
jbocce
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Another prehydration one. This is the last one I will flag. Please go through and flag others accordingly. Thanks.
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Not all pre-hydrate ones are named as such so you might need to look at each. Sorry.
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Sep 30, 2026
| // and pin the landing slice before capturing. | ||
| const defaultViewport = await viewportPageObject.getById('default'); | ||
| await defaultViewport.sliceNavigation.toSlice(12); | ||
| await expect(defaultViewport.overlayText.bottomRight.instanceNumber).toContainText('(13/'); |
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If this type of wait needs to be done for the sliceNavigation in general then it should be included in that function.
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Updated to follow toSlice with waitForViewportsRendered as the docstring suggests, and did the same in RTHydrationDisableConfirmation.
jbocce
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Sep 30, 2026
| await dataOverlayPageObject.toggle(); | ||
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| await page.waitForTimeout(5000); | ||
| await waitForViewportsRendered(page, { timeout: 60000 }); |
jbocce
reviewed
Sep 30, 2026
| await mainToolbarPageObject.layoutSelection.MPR.click(); | ||
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| await page.waitForTimeout(5000); | ||
| await waitForViewportsRendered(page, { timeout: 60000 }); |
jbocce
reviewed
Sep 30, 2026
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| await page.waitForTimeout(5000); | ||
| await checkForScreenshot( | ||
| await waitForViewportsRendered(page, { timeout: 60000 }); |
jbocce
reviewed
Sep 30, 2026
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| await page.waitForTimeout(5000); | ||
| await checkForScreenshot( | ||
| await waitForViewportsRendered(page, { timeout: 60000 }); |
jbocce
reviewed
Sep 30, 2026
| await leftPanelPageObject.loadSeriesByDescription('SEG'); | ||
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| await page.waitForTimeout(5000); | ||
| await waitForViewportsRendered(page, { timeout: 60000 }); |
jbocce
reviewed
Sep 30, 2026
| await mainToolbarPageObject.layoutSelection.MPR.click(); | ||
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| await page.waitForTimeout(5000); | ||
| await waitForViewportsRendered(page, { timeout: 60000 }); |
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Thanks for this. See my comments.
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@jbocce ready for it to be looked over again. |
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Thanks for the updates! Most of my earlier comments are addressed. A few remaining items that Claude found:
-
PR description is out of date. It still describes a "settle before capturing a baseline" change to
checkForScreenshot, but that code was removed andtests/utils/checkForScreenshot.tsis no longer changed by this PR. The counts in the description ("41 files", "91 baselines") may be stale too. Please update the description to match what the PR does now. -
RTDataOverlayNoHydrationThenMPR.spec.tsis not converted. It still captures the grid with the positionalcheckForScreenshot(page, viewportPageObject.grid, ...), so its baselines still contain viewport text. The description mentions this but doesn't say why. Can it be converted tocheckForGridScreenshotin this PR? If not, could you note the reason and open a follow-up issue? -
Minor wording in
.agents/skills/ohif-test-agent/SKILL.md. It sayscheckForGridScreenshotre-resolves panes "each attempt". The helper actually runs a single selector sweep over the whole grid (hideAllViewportGridText) and doesn't re-resolve per-pane objects. The behaviour is fine; please reword it to describe what the code does (the same applies toreferences/utilities.mdif it says the same).
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Good catch on these. |
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Context
Part of #6272, taking care of updating the existing screenshot compare tests that still have text on them.
Overlay text (study date, series description, W/L, slice index), annotation labels and orientation markers are the main source of pixel noise in E2E screenshot comparisons: they drift with data, locale and font rendering.
checkForViewportScreenshotalready hid that text for a single pane, but most specs captured the whole grid through a rawcheckForScreenshot, so the text ended up in the baseline. As long as those baselines contain text, the comparison tolerances cannot be tightened.This PR moves the suite onto text-free captures so the tolerance reduction in #6272 can follow.
Changes & Results
New helper:
checkForGridScreenshot(tests/utils/checkForGridScreenshot.ts)checkForViewportScreenshot. TakesviewportPageObject, hides viewport text across the grid before each capture attempt, and shows it again in afinally.hideAllViewportGridText) rather than by resolving per-viewport page objects, so panes added by a layout change (MPR, 3D four-up) are covered and nothing throws while panes are being added or removed.hideText: falseopts out. Both helpers always capture their own locator (the pane or the grid), so neither accepts alocator.Text hidden by both helpers (
ViewportPageObject)SEG/RTSTRUCT/SRload badge.hideAllViewportGridText()/showAllViewportGridText(). The selectors live at module scope and are shared by the per-viewport and grid-wide methods.DOMOverlayPageObject.viewport.modalityLoadBadgeslets specs assert the load badge now that it is no longer in the baseline.Spec conversions (42 specs)
checkForGridScreenshot(40 calls) and 27 capture a single pane withcheckForViewportScreenshot(52 calls). Some specs use both. No positionalcheckForScreenshotcalls remain in these specs.waitForTimeoutsleeps in these specs are replaced with render waits (waitForViewportRenderCycle/waitForViewportsRendered) or with a wait for an observable state (the hydration prompt, measurement rows).RTHydrationThenMPR,RTNoHydrationThenMPR,RTDataOverlayNoHydrationThenMPR) allow 60s for the volume to render after the layout switch. Their CT study is about 131 MB and is served from the remote DICOMweb server, which takes longer than the default 15s on CI. Serving it from local test data would remove the need for the longer wait.Assertions added where the baseline no longer shows the text
RTNoHydrationThenMPRandSEGNoHydrationThenMPRassert the hydration prompt and the load badge.JumpToMeasurementMPR,Livewire,Spline,SRHydrationandScoord3dProbeassert the measurement panel row, the SVG text and the cached stats throughexpectAnnotationStatsText.ScoordRectangleasserts the measurement rows and the dashed rectangle outline.MultipleSegmentationDataOverlayschecks the listed overlay labels instead of screenshotting the open overlay menu, sothreeSegOverlaysInOverlayMenu.pngis removed.Baselines
ContextMenu(the menu is what the test checks), the cine controls inSEGDataOverlayForUnreferencedDisplaySetNoHydration, and the WSI scale bar.Docs
platform/docs/docs/development/playwright-testing.mdand theohif-test-agentskill (SKILL.md,assets/spec-template.ts,references/*.md) describe when to use each helper: pane, grid, or rawcheckForScreenshotfor non-viewport locators only.Not converted
DataOverlayMenu,DicomTagBrowser,TMTVRenderingandZoomIncapture menus, a dialog, a scrollbar strip or the magnifier element, not a viewport, so they stay on rawcheckForScreenshot.Testing
Run any converted spec, for example:
To confirm the captures are text-free, run a converted spec with
--update-snapshotsand inspect the regenerated image undertests/screenshots/chromium/<spec>/: no overlay text, annotation labels, orientation markers, prompts or load badges should be visible, and the text should be back on screen after the assertion.Checklist
PR
semantic-release format and guidelines.
Code
etc.)
Public Documentation Updates
additions or removals.
Tested Environment
Summary by CodeRabbit