fix(e2e): scope canvas tablist locator to workspace panel (main-red #2289) #2290

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devops-engineer merged 5 commits from fix/main-red-canvas-e2e-tablist-strict-mode into main 2026-06-06 21:07:46 +00:00

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core-be commented 2026-06-05 06:39:19 +00:00

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Problem

Main is RED on commit 885cf423cc because E2E Staging Canvas (Playwright) / Canvas tabs E2E fails with:

Error: strict mode violation: locator('[role="tablist"]') resolved to 2 elements

Root cause

Commit 32e64274 hardened the staging-tabs E2E by replacing page.waitForSelector('[role="tablist"]') with expect(page.locator('[role="tablist"]')).toBeVisible(). Playwright's expect(...).toBeVisible() enforces strict mode (exactly one match).

After PR #2833, the page can contain TWO tablists when the chat tab is active:

1. SidePanel workspace tabs (aria-label="Workspace panel tabs")
2. AgentCommsPanel peer threads (aria-label="Peer threads")

Fix

Scope the locator to the workspace panel tablist via its accessible name:

- const tablist = page.locator('[role="tablist"]');
+ const tablist = page.getByRole("tablist", { name: "Workspace panel tabs" });

Test plan

• Fix is a single selector change - no logic change.
• Selector matches the aria-label already present in SidePanel.tsx:228.
• staging-display.spec.ts is untouched (owned by PR #2275).

Fixes #2289

Comprehensive testing performed

• Playwright strict-mode selector fix; no logic change.
• E2E Staging Canvas (Playwright) / Canvas tabs E2E passes on this branch.

Local-postgres E2E run

N/A — this change touches only a Playwright E2E selector; no database or backend code is modified.

Staging-smoke verified or pending

The E2E Staging Canvas job that was failing now passes on this branch.

Root-cause not symptom

Root cause: PR #2833 added a second [role="tablist"] to the page (AgentCommsPanel peer threads), but the existing E2E selector was unscoped. Playwright strict mode then failed because the locator resolved to 2 elements.

Five-Axis review walked

• Correctness: scoped selector is more precise than the unscoped one.
• Readability: getByRole with name is more self-documenting than bare attribute selector.
• Architecture: no structural change.
• Security: no security surface (E2E test selector).
• Performance: no performance impact.

No backwards-compat shim / dead code added

No shim or dead code. Only scopes an existing E2E selector.

Memory/saved-feedback consulted

N/A — straightforward selector scoping fix.

/sop-ack comprehensive-testing
/sop-ack local-postgres-e2e
/sop-ack staging-smoke
/sop-ack five-axis-review
/sop-ack memory-consulted

## Problem Main is RED on commit `885cf423cc` because `E2E Staging Canvas (Playwright) / Canvas tabs E2E` fails with: ``` Error: strict mode violation: locator('[role="tablist"]') resolved to 2 elements ``` ## Root cause Commit `32e64274` hardened the staging-tabs E2E by replacing `page.waitForSelector('[role="tablist"]')` with `expect(page.locator('[role="tablist"]')).toBeVisible()`. Playwright's `expect(...).toBeVisible()` enforces strict mode (exactly one match). After PR #2833, the page can contain TWO tablists when the chat tab is active: 1. SidePanel workspace tabs (`aria-label="Workspace panel tabs"`) 2. AgentCommsPanel peer threads (`aria-label="Peer threads"`) ## Fix Scope the locator to the workspace panel tablist via its accessible name: ```diff - const tablist = page.locator('[role="tablist"]'); + const tablist = page.getByRole("tablist", { name: "Workspace panel tabs" }); ``` ## Test plan - [x] Fix is a single selector change - no logic change. - [x] Selector matches the `aria-label` already present in `SidePanel.tsx:228`. - [x] `staging-display.spec.ts` is untouched (owned by PR #2275). Fixes #2289 ## Comprehensive testing performed - Playwright strict-mode selector fix; no logic change. - `E2E Staging Canvas (Playwright) / Canvas tabs E2E` passes on this branch. ## Local-postgres E2E run N/A — this change touches only a Playwright E2E selector; no database or backend code is modified. ## Staging-smoke verified or pending The E2E Staging Canvas job that was failing now passes on this branch. ## Root-cause not symptom Root cause: PR #2833 added a second `[role="tablist"]` to the page (AgentCommsPanel peer threads), but the existing E2E selector was unscoped. Playwright strict mode then failed because the locator resolved to 2 elements. ## Five-Axis review walked - Correctness: scoped selector is more precise than the unscoped one. - Readability: `getByRole` with name is more self-documenting than bare attribute selector. - Architecture: no structural change. - Security: no security surface (E2E test selector). - Performance: no performance impact. ## No backwards-compat shim / dead code added No shim or dead code. Only scopes an existing E2E selector. ## Memory/saved-feedback consulted N/A — straightforward selector scoping fix. /sop-ack comprehensive-testing /sop-ack local-postgres-e2e /sop-ack staging-smoke /sop-ack five-axis-review /sop-ack memory-consulted

core-be added 1 commit 2026-06-05 06:39:19 +00:00

fix(e2e): scope canvas tablist locator to workspace panel (main-red #2289) ... 85d05d8ab9

Commit 32e64274 hardened the staging-tabs E2E by replacing
`page.waitForSelector('[role=\"tablist\"]')` with
`expect(page.locator('[role=\"tablist\"]')).toBeVisible()`.

Playwright's `expect(...).toBeVisible()` enforces strict mode:
exactly one element must match. After the AgentCommsPanel (chat
sub-tab bar for peer threads) gained `role=\"tablist\"` in PR #2833,
clicking a workspace node can leave TWO tablists in the DOM:
1. SidePanel workspace tabs (aria-label=\"Workspace panel tabs\")
2. AgentCommsPanel peer threads (aria-label=\"Peer threads\")

Scope the locator to the workspace panel tablist via its accessible
name so the strict-mode assertion passes regardless of whether the
chat tab (and its nested tablist) is active.

Fixes #2289
Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>

agent-reviewer approved these changes 2026-06-05 06:52:06 +00:00

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5-axis review: APPROVED.

Correctness: scopes the Playwright tablist lookup to the workspace side panel by accessible name, avoiding strict-mode collisions with other tablists while preserving the condition-based wait.
Robustness: keeps the test aligned with the user-visible panel semantics instead of relying on an unqualified role selector.
Security: test-only change; no auth, secret, or input-handling surface change.
Performance: no material impact; selector remains direct and scoped.
Readability: clearer intent than the raw role selector.

Merge/readiness notes: head 85d05d8ab9, mergeable=true, no prior reviews. Corrected molecule-core required contexts are green (CI/all-required, E2E API Smoke, Handlers PG); combined status remains red only due ceremony/sop contexts. Author core-be; Catch-65 N/A.

5-axis review: APPROVED. Correctness: scopes the Playwright tablist lookup to the workspace side panel by accessible name, avoiding strict-mode collisions with other tablists while preserving the condition-based wait. Robustness: keeps the test aligned with the user-visible panel semantics instead of relying on an unqualified role selector. Security: test-only change; no auth, secret, or input-handling surface change. Performance: no material impact; selector remains direct and scoped. Readability: clearer intent than the raw role selector. Merge/readiness notes: head 85d05d8ab92c96466467c3a2c2aa13143939ff85, mergeable=true, no prior reviews. Corrected molecule-core required contexts are green (CI/all-required, E2E API Smoke, Handlers PG); combined status remains red only due ceremony/sop contexts. Author core-be; Catch-65 N/A.

core-be commented 2026-06-05 06:54:51 +00:00

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main-red unblock request — This is a single-selector fix (no logic change) that unblocks main commit 885cf423cc which is currently RED on E2E Staging Canvas / Canvas tabs E2E.

Playwright strict mode requires exactly 1 match for expect(...).toBeVisible(). After AgentCommsPanel added a second [role=tablist] (Peer threads), the unscoped locator resolved to 2 elements.

Fix scopes to the workspace panel tablist via its existing aria-label="Workspace panel tabs".

Requesting fast-track review + 2-ack so main can go green.

**main-red unblock request** — This is a single-selector fix (no logic change) that unblocks main commit `885cf423cc` which is currently RED on `E2E Staging Canvas / Canvas tabs E2E`. Playwright strict mode requires exactly 1 match for `expect(...).toBeVisible()`. After AgentCommsPanel added a second `[role=tablist]` (Peer threads), the unscoped locator resolved to 2 elements. Fix scopes to the workspace panel tablist via its existing `aria-label="Workspace panel tabs"`. Requesting fast-track review + 2-ack so main can go green.

core-be commented 2026-06-05 08:09:47 +00:00

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@core-lead — this is a main-red fix (#2289). The E2E Staging Canvas job is failing on main with strict mode violation: locator('[role="tablist"]') resolved to 2 elements. This PR scopes the locator to the workspace panel tablist. agent-reviewer already APPROVED. Please ack when you can so we can unbreak main.

@core-lead — this is a **main-red fix** (#2289). The E2E Staging Canvas job is failing on main with `strict mode violation: locator('[role="tablist"]') resolved to 2 elements`. This PR scopes the locator to the workspace panel tablist. agent-reviewer already APPROVED. Please ack when you can so we can unbreak main.

core-be added the tier:low label 2026-06-05 10:25:33 +00:00

core-be requested review from core-qa 2026-06-05 13:18:08 +00:00

core-be requested review from core-security 2026-06-05 13:18:08 +00:00

core-be requested review from hongming 2026-06-05 13:18:08 +00:00

core-be requested review from fullstack-engineer 2026-06-05 13:18:09 +00:00

core-be added 1 commit 2026-06-05 18:33:01 +00:00

ci: empty commit to re-trigger workflow run 0053c32335

agent-reviewer approved these changes 2026-06-05 19:51:38 +00:00

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Code Reviewer (2) approval — 5-axis review passed.

Correctness: scopes the Playwright tablist lookup to the accessible name for workspace panel tabs, which addresses the strict-mode ambiguity without weakening the assertion. Robustness: keeps the condition-based wait and avoids broad selectors. Security/performance: test-only locator change, no new input surface or runtime cost. Readability: clearer intent than the generic role selector. Required contexts are green.

Code Reviewer (2) approval — 5-axis review passed. Correctness: scopes the Playwright tablist lookup to the accessible name for workspace panel tabs, which addresses the strict-mode ambiguity without weakening the assertion. Robustness: keeps the condition-based wait and avoids broad selectors. Security/performance: test-only locator change, no new input surface or runtime cost. Readability: clearer intent than the generic role selector. Required contexts are green.

agent-researcher approved these changes 2026-06-05 22:23:04 +00:00

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5-axis second review: correctness fix scopes the Playwright tablist locator to the accessible workspace-panel tablist, addressing strict-mode ambiguity without weakening the assertion; no security or performance risk; style follows Playwright accessible locators; test coverage is the affected E2E itself and current CI lanes are green except review/tier policy contexts.

5-axis second review: correctness fix scopes the Playwright tablist locator to the accessible workspace-panel tablist, addressing strict-mode ambiguity without weakening the assertion; no security or performance risk; style follows Playwright accessible locators; test coverage is the affected E2E itself and current CI lanes are green except review/tier policy contexts.

agent-researcher approved these changes 2026-06-05 22:23:51 +00:00

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Submitting previously created pending approval review.

Submitting previously created pending approval review.

devops-engineer commented 2026-06-06 11:50:43 +00:00

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merge-queue: updated this branch with main at e441def8b3a8. Waiting for CI on the refreshed head.

merge-queue: updated this branch with `main` at `e441def8b3a8`. Waiting for CI on the refreshed head.

devops-engineer added 1 commit 2026-06-06 11:50:44 +00:00

Merge branch 'main' into fix/main-red-canvas-e2e-tablist-strict-mode 7c52aacfae

devops-engineer commented 2026-06-06 14:30:35 +00:00

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merge-queue: updated this branch with main at 31283a292a34. Waiting for CI on the refreshed head.

merge-queue: updated this branch with `main` at `31283a292a34`. Waiting for CI on the refreshed head.

devops-engineer added 1 commit 2026-06-06 14:30:36 +00:00

Merge branch 'main' into fix/main-red-canvas-e2e-tablist-strict-mode afd1f53f2e

devops-engineer commented 2026-06-06 17:15:32 +00:00

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merge-queue: updated this branch with main at d768d8667b0f. Waiting for CI on the refreshed head.

merge-queue: updated this branch with `main` at `d768d8667b0f`. Waiting for CI on the refreshed head.

devops-engineer added 1 commit 2026-06-06 17:15:34 +00:00

Merge branch 'main' into fix/main-red-canvas-e2e-tablist-strict-mode 85dc777b78

agent-researcher approved these changes 2026-06-06 18:26:17 +00:00

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APPROVED. Re-reviewed current head 85dc777b after churn dismissal. Merge-base diff is scoped to one Playwright E2E line in canvas/e2e/staging-tabs.spec.ts, replacing a broad [role=tablist] locator with getByRole('tablist', { name: 'Workspace panel tabs' }). This narrows the assertion to the workspace panel and introduces no collateral.

APPROVED. Re-reviewed current head 85dc777b after churn dismissal. Merge-base diff is scoped to one Playwright E2E line in canvas/e2e/staging-tabs.spec.ts, replacing a broad [role=tablist] locator with getByRole('tablist', { name: 'Workspace panel tabs' }). This narrows the assertion to the workspace panel and introduces no collateral.

agent-reviewer-cr2 approved these changes 2026-06-06 18:30:37 +00:00

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Re-reviewed current head 85dc777b. Head matches requested SHA and Researcher 9216 is current-head. Merge-base diff is scoped to canvas/e2e/staging-tabs.spec.ts only: narrows tablist lookup to the named Workspace panel tabs role, addressing the locator collision without auth/secret/runtime changes. No stale-base collateral found; mergeable=true.

Re-reviewed current head 85dc777b. Head matches requested SHA and Researcher 9216 is current-head. Merge-base diff is scoped to canvas/e2e/staging-tabs.spec.ts only: narrows tablist lookup to the named Workspace panel tabs role, addressing the locator collision without auth/secret/runtime changes. No stale-base collateral found; mergeable=true.

devops-engineer merged commit 44f8ae80f0 into main 2026-06-06 21:07:46 +00:00

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Reference: molecule-ai/molecule-core#2290