enhance(apps/chat): Add Cypress E2E tests and data-cy attributes for chat app#5007
enhance(apps/chat): Add Cypress E2E tests and data-cy attributes for chat app#5007rschlaefli wants to merge 1 commit intov3from
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📝 WalkthroughWalkthroughAdds test selectors (data-cy attributes) across chat UI components, introduces multiple new Cypress end-to-end test suites for auth, disclaimer, threads, messaging, and settings, and adds a chat URL env var to Cypress config. Changes
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Pull request overview
This PR adds Cypress E2E coverage for the chat application and instruments chat UI components with data-cy attributes to provide stable selectors for those tests.
Changes:
- Added new Cypress E2E test suites covering auth/noLogin, disclaimer flow, thread management, messaging, and settings.
- Added
data-cyattributes across chat UI components (noLogin, assistant states, disclaimer modal, thread/thread list, settings panel, branch picker). - Updated Cypress configuration with
URL_CHATpointing to the chat app.
Reviewed changes
Copilot reviewed 13 out of 13 changed files in this pull request and generated 6 comments.
Show a summary per file
| File | Description |
|---|---|
| cypress/cypress/e2e/Y-chatbot-auth-workflow.cy.ts | Adds E2E coverage for unauthenticated redirect and authenticated access. |
| cypress/cypress/e2e/Z-chatbot-disclaimer-workflow.cy.ts | Adds E2E coverage for disclaimer modal accept/decline flows. |
| cypress/cypress/e2e/ZA-chatbot-thread-management-workflow.cy.ts | Adds E2E coverage for thread list CRUD and sidebar behavior (with mocked APIs). |
| cypress/cypress/e2e/ZB-chatbot-messaging-workflow.cy.ts | Adds E2E coverage for messaging UI including a stubbed streaming response. |
| cypress/cypress/e2e/ZC-chatbot-settings-workflow.cy.ts | Adds E2E coverage for settings panel behavior and credits/model UI. |
| cypress/cypress.config.ts | Adds URL_CHAT env var for chat app base URL. |
| apps/chat/src/app/noLogin/page.tsx | Adds data-cy hooks for noLogin page tests. |
| apps/chat/src/components/assistant.tsx | Adds data-cy hooks for loading/blocked/header/breadcrumb states. |
| apps/chat/src/components/disclaimer-modal.tsx | Adds data-cy hooks for disclaimer modal and actions. |
| apps/chat/src/components/thread.tsx | Adds data-cy hooks for thread UI, composer, messages, and action buttons. |
| apps/chat/src/components/thread-list.tsx | Adds data-cy hooks for thread list, items, and inline title editing actions. |
| apps/chat/src/components/settings-panel.tsx | Adds data-cy hooks for settings and credits UI. |
| apps/chat/src/components/branch-picker.tsx | Adds data-cy hooks for branch navigation controls. |
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| * Tests for the chatbot authentication and access control flow. | ||
| * Verifies that unauthenticated users are redirected, the noLogin page renders | ||
| * correctly, and authenticated users can access or are blocked from the chatbot | ||
| * depending on their participation status. | ||
| */ |
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The suite description mentions that authenticated users can be blocked based on participation status, but there is no test case covering the "participation required"/403 flow. Consider adding a test that stubs the relevant API to return 403 and asserts the blocked UI (e.g., the element with data-cy="chat-participation-required").
| <div | ||
| data-cy="chat-settings-toggle" | ||
| className="flex cursor-pointer items-center gap-2 border-t p-4 hover:bg-gray-100" | ||
| onClick={() => setOpen(!open)} | ||
| > |
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The settings toggle is implemented as a clickable
| cy.wait('@getDisclaimer') | ||
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| cy.get('[data-cy="chat-thread-list"]').should('be.visible') | ||
| cy.get('[data-cy="chat-thread-item"]').should('have.length', 2) | ||
| cy.contains('First conversation').should('be.visible') | ||
| cy.contains('Second conversation').should('be.visible') |
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These assertions can run before the initial thread list request resolves. Since RuntimeProvider triggers loadThreads/loadCredits/loadModeOptions on mount, this test can become flaky without waiting for the relevant intercepts. Add a cy.wait('@getThreads') (and any other required alias like @getCredits/@GetChatbot) before asserting on rendered thread items.
| cy.wait('@getDisclaimer') | ||
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| // Click on the existing thread | ||
| cy.get('[data-cy="chat-thread-select"]').first().click() | ||
| cy.wait('@getThreadMessages') |
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This test interacts with the thread list immediately after only waiting for @getDisclaimer. Since threads are loaded asynchronously on mount, the thread list may not be populated yet, making the click/expectations flaky. Add a cy.wait('@getThreads') before selecting the thread (and optionally wait for @getChatbot/@getCredits if the UI depends on them).
| // When model selection is enabled, a Select dropdown should be rendered | ||
| // instead of the static model display | ||
| cy.get('[data-cy="chat-model-selection"]').should('be.visible') | ||
| cy.get('[data-cy="chat-model-display"]').should('not.exist') | ||
| }) |
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This test claims the model selection dropdown is rendered when modelSelection is enabled, but it only asserts that the static model display is absent. To actually verify the intended behavior (and avoid false positives where neither control renders correctly), also assert that the model selection control is present (e.g., the element with data-cy="chat-model-select").
| * Covers the welcome state, sending messages, receiving (stubbed) streaming | ||
| * responses, and the message action bar (copy, reload). |
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The file header comment says this suite covers the message action bar (copy, reload), but there are currently no tests exercising those controls. Either add coverage for copy/reload or update the header comment to avoid misleading future readers.
| * Covers the welcome state, sending messages, receiving (stubbed) streaming | |
| * responses, and the message action bar (copy, reload). | |
| * Covers the welcome state, sending messages, and receiving (stubbed) streaming | |
| * responses. |
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Actionable comments posted: 2
🤖 Fix all issues with AI agents
In `@apps/chat/src/components/disclaimer-modal.tsx`:
- Around line 82-84: The Modal and Button usage passes data-cy as a plain
attribute which the design-system expects as a data prop object; update the
Modal (title={disclaimer.title}) and the Buttons in this file to replace any
data-cy="..." with data={{ cy: '...' }} so the components receive the data prop
(e.g., change Modal's data-cy and both Button instances' data-cy usages to
data={{ cy: 'your-value' }}).
In `@cypress/cypress/e2e/Y-chatbot-auth-workflow.cy.ts`:
- Around line 84-91: The current cy.getCookie('participant_token') block
silently no-ops when the cookie is absent; change it to explicitly assert/fail
when the cookie is missing so test doesn't continue unauthenticated. After
calling cy.getCookie('participant_token'), check the result and if falsy throw
an error or call an explicit Cypress assertion (e.g., expect/should) with a
clear message like "participant_token missing — cy.loginStudent() failed",
otherwise call cy.setCookie('participant_token', cookie.value, { domain:
'127.0.0.1', path: '/' }); keep the same identifiers (participant_token,
cy.getCookie, cy.setCookie) so the change is localized and fails fast on missing
auth.
🧹 Nitpick comments (5)
cypress/cypress/e2e/Y-chatbot-auth-workflow.cy.ts (1)
81-81: Replace hardcodedcy.wait(1000)with a deterministic wait.Hardcoded time-based waits are a common source of flakiness in Cypress tests — they may be too short on slow CI runners or unnecessarily slow elsewhere. Prefer waiting on a route alias, a DOM condition, or a cookie assertion.
Suggested approach
cy.loginStudent() - cy.wait(1000) + // Wait for the login to complete by checking for the cookie + cy.getCookie('participant_token').should('exist')cypress/cypress/e2e/ZA-chatbot-thread-management-workflow.cy.ts (2)
142-146: Hardcodedcy.wait(500)— same flakiness concern across all test files.This pattern appears in every
beforeEachacross all four test suites. Consider replacing it with a deterministic wait (e.g., asserting the cookie or a DOM state) and extracting the login + setup into a shared Cypress command or support utility.
32-139: Extract sharedsetupChatInterceptsinto a reusable utility.This helper is duplicated (with minor variations) across
Y-chatbot-auth-workflow,Z-chatbot-disclaimer-workflow,ZA-chatbot-thread-management-workflow,ZB-chatbot-messaging-workflow, andZC-chatbot-settings-workflow. A single parameterized helper incypress/support/(or a shared fixtures file) would reduce maintenance burden and make it easier to update API shapes consistently.Example approach
Create
cypress/cypress/support/chat-intercepts.ts:interface ChatInterceptOptions { chatbotId: string threads?: any[] credits?: { current: number; total: number } disclaimer?: { disclaimer: any; status: any } modelSelection?: boolean systemPrompts?: Record<string, { prompt: string; description: string }> // ...additional overrides } export function setupChatIntercepts(options: ChatInterceptOptions) { const { chatbotId, threads = [], credits = { current: 50, total: 100 }, ...rest } = options // shared intercept setup... }Then import in each test file:
import { setupChatIntercepts } from '../support/chat-intercepts'cypress/cypress/e2e/Z-chatbot-disclaimer-workflow.cy.ts (2)
22-28:declinedfield indisclaimerStatustype is unused.The
declined?: booleanproperty on line 26 is declared but never passed in any test invocation. Either remove it if it's not needed or add test coverage for the declined state to justify its presence.
179-219: Inline intercepts duplicate the helper — consider extendingsetupChatInterceptsWithDisclaimer.This test sets up intercepts manually instead of reusing the helper because the helper doesn't support
disclaimer: null. A small adjustment to the helper's signature (acceptingnullfor disclaimer data) would eliminate this duplication.Suggested approach
function setupChatInterceptsWithDisclaimer( + disclaimerData: typeof DISCLAIMER_DATA | null = DISCLAIMER_DATA, disclaimerStatus: { required: boolean accepted: boolean declined?: boolean } = { required: true, accepted: false } ) { cy.intercept('GET', `/api/chatbots/${CHATBOT_ID}/disclaimer`, { statusCode: 200, body: { - disclaimer: DISCLAIMER_DATA, + disclaimer: disclaimerData, status: disclaimerStatus, }, }).as('getDisclaimer')Then the test simplifies to:
it('No disclaimer modal appears when no disclaimer is required', () => { setupChatInterceptsWithDisclaimer(null, { required: false, accepted: false }) // ... })
| <Modal | ||
| data-cy="chat-disclaimer-modal" | ||
| title={disclaimer.title} |
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Fix data-cy attributes on design-system components to use the correct data prop syntax.
Design-system components (Modal, Button) use data={{ cy: 'value' }} instead of data-cy="value". The current implementation passes data-cy as a standard HTML attribute, which will be silently ignored since these components expect a data prop object. Update lines 83, 140, and 143 to use data={{ cy: '...' }} to ensure Cypress selectors work correctly.
Example fix
- <Modal data-cy="chat-disclaimer-modal" title={disclaimer.title}
+ <Modal data={{ cy: 'chat-disclaimer-modal' }} title={disclaimer.title}
- <Button data-cy="chat-disclaimer-decline" onClick={handleDecline} disabled={isLoading}>
+ <Button data={{ cy: 'chat-disclaimer-decline' }} onClick={handleDecline} disabled={isLoading}>
- <Button data-cy="chat-disclaimer-accept" onClick={handleAccept} disabled={isLoading}>
+ <Button data={{ cy: 'chat-disclaimer-accept' }} onClick={handleAccept} disabled={isLoading}>🤖 Prompt for AI Agents
In `@apps/chat/src/components/disclaimer-modal.tsx` around lines 82 - 84, The
Modal and Button usage passes data-cy as a plain attribute which the
design-system expects as a data prop object; update the Modal
(title={disclaimer.title}) and the Buttons in this file to replace any
data-cy="..." with data={{ cy: '...' }} so the components receive the data prop
(e.g., change Modal's data-cy and both Button instances' data-cy usages to
data={{ cy: 'your-value' }}).
| cy.getCookie('participant_token').then((cookie) => { | ||
| if (cookie) { | ||
| cy.setCookie('participant_token', cookie.value, { | ||
| domain: '127.0.0.1', | ||
| path: '/', | ||
| }) | ||
| } | ||
| }) |
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Silent no-op when participant_token cookie is missing will mask test failures.
If cy.loginStudent() fails to set the cookie, this block silently does nothing and the test continues without authentication. The test could still pass at line 98 due to the intercepted API responses, giving a false positive.
Suggested fix
- cy.getCookie('participant_token').then((cookie) => {
- if (cookie) {
- cy.setCookie('participant_token', cookie.value, {
- domain: '127.0.0.1',
- path: '/',
- })
- }
- })
+ cy.getCookie('participant_token').should('exist').then((cookie) => {
+ cy.setCookie('participant_token', cookie!.value, {
+ domain: '127.0.0.1',
+ path: '/',
+ })
+ })📝 Committable suggestion
‼️ IMPORTANT
Carefully review the code before committing. Ensure that it accurately replaces the highlighted code, contains no missing lines, and has no issues with indentation. Thoroughly test & benchmark the code to ensure it meets the requirements.
| cy.getCookie('participant_token').then((cookie) => { | |
| if (cookie) { | |
| cy.setCookie('participant_token', cookie.value, { | |
| domain: '127.0.0.1', | |
| path: '/', | |
| }) | |
| } | |
| }) | |
| cy.getCookie('participant_token').should('exist').then((cookie) => { | |
| cy.setCookie('participant_token', cookie!.value, { | |
| domain: '127.0.0.1', | |
| path: '/', | |
| }) | |
| }) |
🤖 Prompt for AI Agents
In `@cypress/cypress/e2e/Y-chatbot-auth-workflow.cy.ts` around lines 84 - 91, The
current cy.getCookie('participant_token') block silently no-ops when the cookie
is absent; change it to explicitly assert/fail when the cookie is missing so
test doesn't continue unauthenticated. After calling
cy.getCookie('participant_token'), check the result and if falsy throw an error
or call an explicit Cypress assertion (e.g., expect/should) with a clear message
like "participant_token missing — cy.loginStudent() failed", otherwise call
cy.setCookie('participant_token', cookie.value, { domain: '127.0.0.1', path: '/'
}); keep the same identifiers (participant_token, cy.getCookie, cy.setCookie) so
the change is localized and fails fast on missing auth.
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Add comprehensive data-cy attributes to all interactive elements across the chatbot UI (thread, composer, settings, disclaimer, sidebar, noLogin) and introduce 5 new Cypress test suites covering authentication, disclaimer flow, thread management, messaging, and settings panel. https://claude.ai/code/session_01XaniHBWXbZnTfuEcNsXjWQ
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Actionable comments posted: 7
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⚠️ Outside diff range comments (1)
apps/chat/src/components/disclaimer-modal.tsx (1)
1-1:⚠️ Potential issue | 🟡 MinorFix Prettier formatting issues.
The CI pipeline reports Prettier formatting violations for this file. Run
prettier --writeto resolve. As per coding guidelines, the project enforces "no semicolons, single quotes, trailing comma es5, 2-space indent."
🤖 Fix all issues with AI agents
In `@apps/chat/src/components/assistant.tsx`:
- Line 150: The JSX elements in the Assistant component have long inline
attribute lists (e.g., the <div data-cy="chat-participation-required" ...> and
the other elements with data-cy attributes) that exceed Prettier's print width;
run prettier --write on apps/chat/src/components/assistant.tsx or manually wrap
attributes to separate lines so each prop (including data-cy) is on its own line
to satisfy formatting (apply same fix to the other two elements with data-cy
attributes in that component).
In `@cypress/cypress/e2e/Y-chatbot-auth-workflow.cy.ts`:
- Line 1: This file has Prettier formatting issues; run the project's formatter
to reformat it (e.g., execute prettier --write against the spec file) or run the
repository's formatting script so the leading triple-slash reference line (///
<reference types="cypress" />) and the rest of
cypress/e2e/Y-chatbot-auth-workflow.cy.ts conform to the project's Prettier
rules; commit the resulting changes so CI formatting checks pass.
In `@cypress/cypress/e2e/ZA-chatbot-thread-management-workflow.cy.ts`:
- Line 1: The file ZA-chatbot-thread-management-workflow.cy.ts has Prettier
formatting violations; run the project's formatter (e.g., execute prettier
--write on this file) or apply the repo's Prettier config to reformat the file
(ensure the leading triple-slash reference line and entire test file match the
project's Prettier rules), then commit the formatted file so CI no longer
reports formatting errors.
In `@cypress/cypress/e2e/ZB-chatbot-messaging-workflow.cy.ts`:
- Line 1: This file fails Prettier formatting; run the project's Prettier
formatter on cypress/cypress/e2e/ZB-chatbot-messaging-workflow.cy.ts (e.g., run
prettier --write cypress/cypress/e2e/ZB-chatbot-messaging-workflow.cy.ts or the
repo's format script) then stage and commit the rewritten file so the leading
triple-slash reference and the rest of the file conform to Prettier rules;
ensure your editor/CI settings match the project's Prettier config to avoid
future diffs.
- Around line 19-31: Update makeStreamBody to include a unique messageId on the
initial start event and an id on each text-stream event so the SDK can assemble
fragments (i.e., add messageId in the object for the 'start' event and include
id fields for 'text-start', 'text-delta', and 'text-end' events in
makeStreamBody), and ensure the HTTP response used in the test intercept that
returns this SSE sets the header "x-vercel-ai-ui-message-stream" to "v1" so the
mocked stream complies with the Vercel AI SDK Data Stream Protocol.
In `@cypress/cypress/e2e/ZC-chatbot-settings-workflow.cy.ts`:
- Around line 205-225: The test title claims to verify the reasoning-effort
selector but never asserts it; update the test by either renaming the it(...)
description to match the current assertions (keeping the uses of
setupChatIntercepts and the existing cy.get('[data-cy="chat-settings-panel"]') /
cy.get('[data-cy="chat-model-selection"]') checks) OR modify the mock and
assertions: change setupChatIntercepts call to return model config with
supportsReasoning: true and allowedReasoningEfforts containing multiple entries
and add an assertion for the reasoning UI element such as
cy.get('[data-cy="chat-reasoning-effort"]').should('be.visible') so the test
title matches the behavior being validated.
- Line 1: The file fails Prettier formatting; run your project's formatter
(e.g., prettier --write) on the file containing the top line "/// <reference
types=\"cypress\" />" to fix spacing/linebreaks and any trailing whitespace, or
apply the project's Prettier/ESLint autofix; commit the reformatted file so CI
no longer reports formatting errors.
🧹 Nitpick comments (4)
cypress/cypress/e2e/Y-chatbot-auth-workflow.cy.ts (1)
93-99: Weak assertion for authenticated access test.The test only asserts
chat-no-logindoesn't exist (line 98), which would also pass if the page is blank or stuck loading. Consider adding a positive assertion that the chat interface (e.g.,chat-composerorchat-loading) is visible, similar to the disclaimer tests that assertcy.get('[data-cy="chat-composer"]').should('be.visible').Proposed fix
// Should see the chat interface (composer) or loading state, not the noLogin page cy.get('[data-cy="chat-no-login"]').should('not.exist') + cy.get('[data-cy="chat-composer"]').should('be.visible')cypress/cypress/e2e/ZB-chatbot-messaging-workflow.cy.ts (1)
33-88: Substantial duplication of intercept setup across test files.The intercept setup for disclaimer, threads, credits, and chatbot metadata is duplicated across all five test files (
Y-,Z-,ZA-,ZB-,ZC-). Consider extracting a shared helper module (e.g.,cypress/cypress/support/chatbot-intercepts.ts) that exports a configurablesetupChatInterceptsfunction to reduce maintenance burden.Also applies to: 90-171
cypress/cypress/e2e/Z-chatbot-disclaimer-workflow.cy.ts (2)
179-219: Inline intercept duplication — reusesetupChatInterceptsWithDisclaimer.This test duplicates all intercept definitions inline instead of calling
setupChatInterceptsWithDisclaimer({ required: false, accepted: false }), which would produce the same result since the helper already accepts a status parameter. The only difference isdisclaimer: nullvsdisclaimer: DISCLAIMER_DATA— you could extend the helper with a parameter to control that.Suggested approach
- it('No disclaimer modal appears when no disclaimer is required', () => { - cy.intercept('GET', `/api/chatbots/${CHATBOT_ID}/disclaimer`, { - statusCode: 200, - body: { - disclaimer: null, - status: { required: false, accepted: false }, - }, - }).as('getDisclaimer') - - cy.intercept('GET', `/api/chatbots/${CHATBOT_ID}/threads`, { - ... - // ... 30+ lines of duplicated intercepts + it('No disclaimer modal appears when no disclaimer is required', () => { + setupChatInterceptsWithDisclaimer( + { required: false, accepted: false }, + null // pass null disclaimer + )This requires adding a second parameter to
setupChatInterceptsWithDisclaimerfor the disclaimer body.
66-73:cy.wait(500)is a brittle timing pattern (applies to all test files).All five test files use
cy.wait(500)inbeforeEachaftercy.loginStudent(). Fixed waits are fragile and slow down the suite. If the login command is async, prefer waiting on an alias or asserting a post-login condition (e.g., a cookie or a specific URL) instead.
| if (participationRequired) { | ||
| return ( | ||
| <div className="bg-muted flex min-h-screen w-full items-center justify-center px-4"> | ||
| <div data-cy="chat-participation-required" className="bg-muted flex min-h-screen w-full items-center justify-center px-4"> |
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Fix Prettier formatting — long lines need wrapping.
The CI pipeline flags Prettier formatting issues in this file. Lines 150, 174, and 184 have the data-cy attribute inlined on the same line as multiple other attributes, likely exceeding the print width. Run prettier --write to auto-format.
Also applies to: 174-174, 184-184
🤖 Prompt for AI Agents
In `@apps/chat/src/components/assistant.tsx` at line 150, The JSX elements in the
Assistant component have long inline attribute lists (e.g., the <div
data-cy="chat-participation-required" ...> and the other elements with data-cy
attributes) that exceed Prettier's print width; run prettier --write on
apps/chat/src/components/assistant.tsx or manually wrap attributes to separate
lines so each prop (including data-cy) is on its own line to satisfy formatting
(apply same fix to the other two elements with data-cy attributes in that
component).
| @@ -0,0 +1,100 @@ | |||
| /// <reference types="cypress" /> | |||
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Fix Prettier formatting issues.
The CI pipeline reports formatting errors for this file. Run prettier --write to fix.
🧰 Tools
🪛 GitHub Actions: Check file formatting
[error] 1-1: Prettier formatting issues detected. Run 'prettier --write' to fix.
🤖 Prompt for AI Agents
In `@cypress/cypress/e2e/Y-chatbot-auth-workflow.cy.ts` at line 1, This file has
Prettier formatting issues; run the project's formatter to reformat it (e.g.,
execute prettier --write against the spec file) or run the repository's
formatting script so the leading triple-slash reference line (/// <reference
types="cypress" />) and the rest of cypress/e2e/Y-chatbot-auth-workflow.cy.ts
conform to the project's Prettier rules; commit the resulting changes so CI
formatting checks pass.
| @@ -0,0 +1,322 @@ | |||
| /// <reference types="cypress" /> | |||
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Fix Prettier formatting issues.
The CI pipeline reports formatting errors for this file. Run prettier --write to fix.
🧰 Tools
🪛 GitHub Actions: Check file formatting
[error] 1-1: Prettier formatting issues detected. Run 'prettier --write' to fix.
🤖 Prompt for AI Agents
In `@cypress/cypress/e2e/ZA-chatbot-thread-management-workflow.cy.ts` at line 1,
The file ZA-chatbot-thread-management-workflow.cy.ts has Prettier formatting
violations; run the project's formatter (e.g., execute prettier --write on this
file) or apply the repo's Prettier config to reformat the file (ensure the
leading triple-slash reference line and entire test file match the project's
Prettier rules), then commit the formatted file so CI no longer reports
formatting errors.
| @@ -0,0 +1,313 @@ | |||
| /// <reference types="cypress" /> | |||
There was a problem hiding this comment.
Fix Prettier formatting issues.
The CI pipeline reports formatting errors for this file. Run prettier --write to fix.
🧰 Tools
🪛 GitHub Actions: Check file formatting
[error] 1-1: Prettier formatting issues detected. Run 'prettier --write' to fix.
🤖 Prompt for AI Agents
In `@cypress/cypress/e2e/ZB-chatbot-messaging-workflow.cy.ts` at line 1, This file
fails Prettier formatting; run the project's Prettier formatter on
cypress/cypress/e2e/ZB-chatbot-messaging-workflow.cy.ts (e.g., run prettier
--write cypress/cypress/e2e/ZB-chatbot-messaging-workflow.cy.ts or the repo's
format script) then stage and commit the rewritten file so the leading
triple-slash reference and the rest of the file conform to Prettier rules;
ensure your editor/CI settings match the project's Prettier config to avoid
future diffs.
| function makeStreamBody(text: string) { | ||
| const lines = [ | ||
| `data: ${JSON.stringify({ type: 'start' })}`, | ||
| `data: ${JSON.stringify({ type: 'start-step' })}`, | ||
| `data: ${JSON.stringify({ type: 'text-start' })}`, | ||
| `data: ${JSON.stringify({ type: 'text-delta', delta: text })}`, | ||
| `data: ${JSON.stringify({ type: 'text-end' })}`, | ||
| `data: ${JSON.stringify({ type: 'finish-step' })}`, | ||
| `data: ${JSON.stringify({ type: 'finish' })}`, | ||
| 'data: [DONE]', | ||
| ].join('\n') | ||
| return lines | ||
| } |
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🧩 Analysis chain
🌐 Web query:
Vercel AI SDK data stream protocol format specification 2025
💡 Result:
Vercel AI SDK Data Stream Protocol (v1) — format/spec (as used in 2025)
Transport
- Uses Server-Sent Events (SSE): each stream part is sent as an SSE event line of the form
data: <payload>\n\n, where<payload>is usually a JSON object. [1] - If you implement a compatible custom backend, set the HTTP response header:
x-vercel-ai-ui-message-stream: v1[1] - Stream terminates with an SSE literal marker:
data: [DONE][1]
Stream parts (JSON payloads)
Each SSE data: JSON object includes a "type" plus type-specific fields. Supported parts include: [1]
-
Message lifecycle
{"type":"start","messageId":"..."}{"type":"finish"}{"type":"abort","reason":"..."}- Steps (for multi-call/tool flows):
{"type":"start-step"},{"type":"finish-step"}
-
Text blocks (start/delta/end with a shared
id){"type":"text-start","id":"..."}{"type":"text-delta","id":"...","delta":"..."}{"type":"text-end","id":"..."}
-
Reasoning blocks (start/delta/end with a shared
id){"type":"reasoning-start","id":"..."}{"type":"reasoning-delta","id":"...","delta":"..."}{"type":"reasoning-end","id":"..."}
-
Sources
{"type":"source-url","sourceId":"...","url":"..."}{"type":"source-document","sourceId":"...","mediaType":"file","title":"..."}
-
Files
{"type":"file","url":"...","mediaType":"image/png"}
-
Custom typed data
{"type":"data-<suffix>","data":{...}}(example:data-weather)
-
Errors
{"type":"error","errorText":"..."}
-
Tool I/O
- Input streaming:
tool-input-start,tool-input-delta, thentool-input-available(with fullinput) - Output:
tool-output-available(withoutput)
- Input streaming:
Note on “SSE streaming” change
Vercel’s AI SDK moved to SSE as the standard for streaming (improving robustness/debuggability), and the above “data stream protocol” is defined on top of SSE. [1][2]
Sources: AI SDK UI “Stream Protocols” (latest spec) [1], Vercel AI SDK 5 blog (SSE standardization) [2].
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🌐 Web query:
@assistant-ui/react 0.10.43 streaming protocol data stream format requirements
💡 Result:
For @assistant-ui/react 0.10.43, “streaming protocol” (via @assistant-ui/react-data-stream) expects your backend to return a Vercel AI SDK “Data Stream Protocol” response (SSE-based). (assistant-ui.com)
HTTP response requirements
- Stream as Server-Sent Events (SSE) (i.e.,
text/event-streamwithdata: ...frames). (ai-sdk.dev) - Set header:
x-vercel-ai-ui-message-stream: v1(required for custom backends emitting data streams). (ai-sdk.dev) - Terminate the stream with:
data: [DONE]. (ai-sdk.dev)
Event (frame) format requirements
Each SSE event is a JSON object in a data: line (followed by a blank line), e.g.:
- Message lifecycle:
{"type":"start", ...}then later{"type":"finish"}. (ai-sdk.dev) - Text streaming uses a start/delta/end pattern:
text-start,text-delta,text-end. (ai-sdk.dev) - Tool calling parts (for tool input/output streaming):
tool-input-start,tool-input-delta,tool-input-available,tool-output-available. (ai-sdk.dev)
- Errors/abort:
{"type":"error", ...}and{"type":"abort", ...}. (ai-sdk.dev)
Practical note (assistant-ui backend helper)
assistant-ui’s docs show implementing the endpoint with createAssistantStreamResponse from assistant-stream, which is intended to emit the right stream for the data-stream runtime. (assistant-ui.com)
Citations:
- 1: https://www.assistant-ui.com/docs/runtimes/data-stream
- 2: https://ai-sdk.dev/docs/ai-sdk-ui/stream-protocol
- 3: https://ai-sdk.dev/docs/ai-sdk-ui/stream-protocol
- 4: https://ai-sdk.dev/docs/ai-sdk-ui/stream-protocol
- 5: https://ai-sdk.dev/docs/ai-sdk-ui/stream-protocol?utm_source=openai
- 6: https://ai-sdk.dev/docs/ai-sdk-ui/stream-protocol?utm_source=openai
- 7: https://ai-sdk.dev/docs/ai-sdk-ui/stream-protocol
- 8: https://ai-sdk.dev/docs/ai-sdk-ui/stream-protocol
- 9: https://www.assistant-ui.com/docs/runtimes/data-stream
Add required id fields to text-stream events and messageId to the start event, and include the proper HTTP header.
The mocked SSE stream is missing required fields per the Vercel AI SDK Data Stream Protocol. Text-block events (text-start, text-delta, text-end) must each include an id field to enable proper message assembly in the SDK. The initial start event should include a messageId field. Additionally, the HTTP intercept should set the x-vercel-ai-ui-message-stream: v1 header to signal protocol compliance to custom backends.
Current mocked format (incomplete)
data: ${JSON.stringify({ type: 'start' })}
data: ${JSON.stringify({ type: 'text-start' })}
data: ${JSON.stringify({ type: 'text-delta', delta: text })}
data: ${JSON.stringify({ type: 'text-end' })}
data: [DONE]
Without these fields, the SDK may silently mishandle the stream fragments, and test assertions could pass by coincidence rather than correct implementation.
🤖 Prompt for AI Agents
In `@cypress/cypress/e2e/ZB-chatbot-messaging-workflow.cy.ts` around lines 19 -
31, Update makeStreamBody to include a unique messageId on the initial start
event and an id on each text-stream event so the SDK can assemble fragments
(i.e., add messageId in the object for the 'start' event and include id fields
for 'text-start', 'text-delta', and 'text-end' events in makeStreamBody), and
ensure the HTTP response used in the test intercept that returns this SSE sets
the header "x-vercel-ai-ui-message-stream" to "v1" so the mocked stream complies
with the Vercel AI SDK Data Stream Protocol.
| @@ -0,0 +1,226 @@ | |||
| /// <reference types="cypress" /> | |||
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Fix Prettier formatting issues.
The CI pipeline reports formatting errors for this file. Run prettier --write to fix.
🧰 Tools
🪛 GitHub Actions: Check file formatting
[error] 1-1: Prettier formatting issues detected. Run 'prettier --write' to fix.
🤖 Prompt for AI Agents
In `@cypress/cypress/e2e/ZC-chatbot-settings-workflow.cy.ts` at line 1, The file
fails Prettier formatting; run your project's formatter (e.g., prettier --write)
on the file containing the top line "/// <reference types=\"cypress\" />" to fix
spacing/linebreaks and any trailing whitespace, or apply the project's
Prettier/ESLint autofix; commit the reformatted file so CI no longer reports
formatting errors.
| it('Reasoning effort selector appears when model supports reasoning', () => { | ||
| // The reasoning effort selector is shown only when the selected model | ||
| // has supportsReasoning=true and allowedReasoningEfforts has more than 1 entry. | ||
| // This is determined client-side by the settingsStore, which reads from | ||
| // the chatbot API response. We simulate this by verifying the selector | ||
| // element exists when the store is configured accordingly. | ||
| setupChatIntercepts({ current: 50, total: 100 }, true) | ||
|
|
||
| cy.visit(`${Cypress.env('URL_CHAT')}/${CHATBOT_ID}`, { | ||
| failOnStatusCode: false, | ||
| }) | ||
|
|
||
| cy.wait('@getDisclaimer') | ||
| cy.wait('@getChatbot') | ||
|
|
||
| // The reasoning effort selector visibility depends on the model's | ||
| // supportsReasoning flag. We verify the data-cy attribute is wired up | ||
| // and ready for when the flag is true. | ||
| cy.get('[data-cy="chat-settings-panel"]').should('be.visible') | ||
| cy.get('[data-cy="chat-model-selection"]').should('be.visible') | ||
| }) |
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Test title is misleading — no reasoning effort selector is actually asserted.
This test claims to verify "Reasoning effort selector appears when model supports reasoning" but only asserts chat-settings-panel and chat-model-selection are visible — the same as other tests. The mock response doesn't include any reasoning-related configuration (e.g., supportsReasoning, allowedReasoningEfforts), and there's no assertion on a reasoning-specific data-cy attribute.
Either rename the test to reflect what it actually verifies, or update the mock to include reasoning configuration and add an assertion for the reasoning effort UI element.
🤖 Prompt for AI Agents
In `@cypress/cypress/e2e/ZC-chatbot-settings-workflow.cy.ts` around lines 205 -
225, The test title claims to verify the reasoning-effort selector but never
asserts it; update the test by either renaming the it(...) description to match
the current assertions (keeping the uses of setupChatIntercepts and the existing
cy.get('[data-cy="chat-settings-panel"]') /
cy.get('[data-cy="chat-model-selection"]') checks) OR modify the mock and
assertions: change setupChatIntercepts call to return model config with
supportsReasoning: true and allowedReasoningEfforts containing multiple entries
and add an assertion for the reasoning UI element such as
cy.get('[data-cy="chat-reasoning-effort"]').should('be.visible') so the test
title matches the behavior being validated.
Summary
This PR adds comprehensive end-to-end testing infrastructure for the chat application by introducing Cypress test files and instrumenting UI components with
data-cyattributes for reliable test selectors.Key Changes
Test Infrastructure
Y-chatbot-auth-workflow.cy.ts: Tests authentication flow, noLogin page rendering, and access controlZ-chatbot-disclaimer-workflow.cy.ts: Tests disclaimer modal display, acceptance/decline flows, and blocked stateZA-chatbot-thread-management-workflow.cy.ts: Tests thread creation, switching, editing, deletion, and sidebar managementcypress.config.ts: AddedURL_CHATenvironment variable pointing to chat app athttp://127.0.0.1:3004UI Instrumentation
Added
data-cyattributes throughout the chat application for reliable test selectors:Authentication & Access:
chat-no-login,chat-no-login-title,chat-no-login-linkchat-participation-requiredLoading & Disclaimer States:
chat-loading,chat-disclaimer-declined,chat-show-disclaimer-againchat-disclaimer-modal,chat-disclaimer-content,chat-disclaimer-accept,chat-disclaimer-declineChat Interface:
chat-header,chat-breadcrumb-name,chat-breadcrumb-threadchat-thread,chat-composer,chat-composer-input,chat-send-button,chat-cancel-buttonchat-user-message,chat-user-message-content,chat-assistant-message,chat-assistant-message-contentchat-edit-message-button,chat-edit-composer,chat-edit-composer-input,chat-edit-send-button,chat-edit-cancel-buttonchat-copy-message-button,chat-reload-message-buttonThread Management:
chat-thread-list,chat-thread-item,chat-thread-selectchat-thread-edit-button,chat-thread-delete-buttonchat-thread-title-input,chat-thread-title-save,chat-thread-title-cancelchat-new-thread-buttonBranch Navigation:
chat-branch-picker,chat-branch-previous,chat-branch-next,chat-branch-indicatorSettings & Credits:
chat-settings-toggle,chat-settings-panelchat-mode-selection,chat-mode-selectchat-model-selection,chat-model-select,chat-model-displaychat-credits-section,chat-credits-display,chat-credits-empty-messageWelcome State:
chat-welcome-messageImplementation Details
Zprefix to ensure they run after other test suiteshttps://claude.ai/code/session_01XaniHBWXbZnTfuEcNsXjWQ
Summary by CodeRabbit
Tests
Chores