create header test file #58
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📝 WalkthroughWalkthroughA new test suite for the Header component has been added, covering the rendering of UI elements including the banner, title, navigation links, and profile section, as well as user interaction handling with logout functionality. Changes
Estimated code review effort🎯 2 (Simple) | ⏱️ ~12 minutes Possibly related issues
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Actionable comments posted: 9
🧹 Nitpick comments (1)
src/components/layout/Header/Header.test.tsx (1)
5-56: Expand test coverage for accessibility, keyboard interactions, and edge cases.The current tests cover basic rendering and click interactions, but are missing coverage for:
- Accessibility tests (keyboard navigation, focus management, ARIA attributes)
- Disabled state testing (if applicable)
- Variants (if the Header has different styles or modes)
- Keyboard interactions (Enter/Space key on buttons, Tab navigation)
Based on coding guidelines: "Include tests for: default props, variants, interactions, disabled state, accessibility in component tests"
Example additions:
it("should handle keyboard navigation with Enter key", async () => { const user = userEvent.setup(); render(<Header {...defaultProps} />); const profileButton = screen.getByRole("button", { name: /profile/i }); await user.tab(); await user.keyboard("{Enter}"); expect(mockLogout).toHaveBeenCalledOnce(); }); it("should have proper ARIA labels", () => { render(<Header {...defaultProps} />); const banner = screen.getByRole("banner"); expect(banner).toHaveAccessibleName(); });
📜 Review details
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📒 Files selected for processing (1)
src/components/layout/Header/Header.test.tsx
🧰 Additional context used
📓 Path-based instructions (4)
**/*.{ts,tsx}
📄 CodeRabbit inference engine (.github/copilot-instructions.md)
**/*.{ts,tsx}: Use TypeScript for all files
Prefertypefor unions and primitives,interfacefor object shapes
Use?.optional chaining and??nullish coalescing
Files:
src/components/layout/Header/Header.test.tsx
src/components/**/[!.]*.tsx
📄 CodeRabbit inference engine (.github/copilot-instructions.md)
Define interfaces for all component props in separate
[ComponentName]Props.tsfiles
Files:
src/components/layout/Header/Header.test.tsx
src/components/**/*.tsx
📄 CodeRabbit inference engine (.github/copilot-instructions.md)
src/components/**/*.tsx: Use function components (not arrow functions for exported components). Export named components:export function ComponentName() {}
Use destructuring for props, but keep the full props object for clarity in React components
Use React 19 features when appropriate
Use JSDoc comments for component documentation with@exampletags
Use TailwindCSS v4 utility classes exclusively for styling
Use DaisyUI component classes (e.g.,btn,card,input) and variants (e.g.,btn-primary,btn-secondary,btn-sm,btn-md,btn-lg)
Build dynamic class names using arrays and.join(' ')
Component files: PascalCase (e.g.,Button.tsx,UserProfile.tsx)
Follow established component directory structure:/src/components/[category]/[ComponentName]/with ComponentName.tsx, ComponentNameProps.ts, ComponentName.test.tsx, ComponentName.stories.tsx files
Files:
src/components/layout/Header/Header.test.tsx
src/**/*.test.tsx
📄 CodeRabbit inference engine (.github/copilot-instructions.md)
src/**/*.test.tsx: Test files: PascalCase with.test.tsxsuffix (e.g.,Button.test.tsx)
Always write tests before implementation when adding new features (Test-Driven Development - TDD Red-Green-Refactor cycle)
Use Vitest as the test runner
Use React Testing Library for component testing
Use @testing-library/user-event for user interactions in tests
Follow the Arrange-Act-Assert (AAA) pattern in tests
Use descriptive test names starting with 'should'
Use semantic queries in order of preference: getByRole, getByLabelText, getByPlaceholderText, getByText, getByTestId (last resort)
Always use async/await with user events in tests
Mock functions withvi.fn()(notjest.fn()) in Vitest
Test user interactions, not implementation details
Include tests for: default props, variants, interactions, disabled state, accessibility in component tests
Files:
src/components/layout/Header/Header.test.tsx
🧠 Learnings (9)
📓 Common learnings
Learnt from: CR
Repo: dbc2201/class-notes PR: 0
File: .github/copilot-instructions.md:0-0
Timestamp: 2025-12-23T08:13:56.218Z
Learning: Applies to src/**/*.test.tsx : Include tests for: default props, variants, interactions, disabled state, accessibility in component tests
Learnt from: CR
Repo: dbc2201/class-notes PR: 0
File: .github/copilot-instructions.md:0-0
Timestamp: 2025-12-23T08:13:56.218Z
Learning: Applies to src/**/*.test.tsx : Test user interactions, not implementation details
📚 Learning: 2025-12-23T08:13:56.218Z
Learnt from: CR
Repo: dbc2201/class-notes PR: 0
File: .github/copilot-instructions.md:0-0
Timestamp: 2025-12-23T08:13:56.218Z
Learning: Applies to src/**/*.test.tsx : Include tests for: default props, variants, interactions, disabled state, accessibility in component tests
Applied to files:
src/components/layout/Header/Header.test.tsx
📚 Learning: 2025-12-23T08:13:56.218Z
Learnt from: CR
Repo: dbc2201/class-notes PR: 0
File: .github/copilot-instructions.md:0-0
Timestamp: 2025-12-23T08:13:56.218Z
Learning: Applies to src/**/*.test.tsx : Test user interactions, not implementation details
Applied to files:
src/components/layout/Header/Header.test.tsx
📚 Learning: 2025-12-23T08:13:56.218Z
Learnt from: CR
Repo: dbc2201/class-notes PR: 0
File: .github/copilot-instructions.md:0-0
Timestamp: 2025-12-23T08:13:56.218Z
Learning: Applies to src/**/*.test.tsx : Test files: PascalCase with `.test.tsx` suffix (e.g., `Button.test.tsx`)
Applied to files:
src/components/layout/Header/Header.test.tsx
📚 Learning: 2025-12-23T08:13:56.218Z
Learnt from: CR
Repo: dbc2201/class-notes PR: 0
File: .github/copilot-instructions.md:0-0
Timestamp: 2025-12-23T08:13:56.218Z
Learning: Applies to src/components/**/*.tsx : Component files: PascalCase (e.g., `Button.tsx`, `UserProfile.tsx`)
Applied to files:
src/components/layout/Header/Header.test.tsx
📚 Learning: 2025-12-23T08:13:56.218Z
Learnt from: CR
Repo: dbc2201/class-notes PR: 0
File: .github/copilot-instructions.md:0-0
Timestamp: 2025-12-23T08:13:56.218Z
Learning: Applies to src/**/*.test.tsx : Follow the Arrange-Act-Assert (AAA) pattern in tests
Applied to files:
src/components/layout/Header/Header.test.tsx
📚 Learning: 2025-12-23T08:13:56.218Z
Learnt from: CR
Repo: dbc2201/class-notes PR: 0
File: .github/copilot-instructions.md:0-0
Timestamp: 2025-12-23T08:13:56.218Z
Learning: Applies to src/**/*.test.tsx : Use descriptive test names starting with 'should'
Applied to files:
src/components/layout/Header/Header.test.tsx
📚 Learning: 2025-12-23T08:13:56.218Z
Learnt from: CR
Repo: dbc2201/class-notes PR: 0
File: .github/copilot-instructions.md:0-0
Timestamp: 2025-12-23T08:13:56.218Z
Learning: Applies to src/**/*.test.tsx : Mock functions with `vi.fn()` (not `jest.fn()`) in Vitest
Applied to files:
src/components/layout/Header/Header.test.tsx
📚 Learning: 2025-12-23T08:13:56.218Z
Learnt from: CR
Repo: dbc2201/class-notes PR: 0
File: .github/copilot-instructions.md:0-0
Timestamp: 2025-12-23T08:13:56.218Z
Learning: Applies to src/**/*.test.tsx : Use React Testing Library for component testing
Applied to files:
src/components/layout/Header/Header.test.tsx
| @@ -0,0 +1,56 @@ | |||
| import { render, screen, fireEvent } from "@testing-library/react"; | |||
There was a problem hiding this comment.
Replace fireEvent with @testing-library/user-event for user interactions.
The coding guidelines require using @testing-library/user-event for user interactions as it provides more realistic browser behavior than fireEvent.
🔎 Proposed fix
-import { render, screen, fireEvent } from "@testing-library/react";
+import { render, screen } from "@testing-library/react";
+import userEvent from "@testing-library/user-event";Based on coding guidelines: "Use @testing-library/user-event for user interactions in tests"
📝 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.
| import { render, screen, fireEvent } from "@testing-library/react"; | |
| import { render, screen } from "@testing-library/react"; | |
| import userEvent from "@testing-library/user-event"; |
🤖 Prompt for AI Agents
In src/components/layout/Header/Header.test.tsx around line 1, tests import and
use fireEvent from "@testing-library/react"; replace this with user-event:
import userEvent from "@testing-library/user-event" (remove fireEvent), update
all test interactions to use userEvent methods (e.g., userEvent.click,
userEvent.type) which provide more realistic browser behavior, and ensure any
async userEvent calls are awaited when necessary; no other test logic changes
required.
| describe("Header component", () => { | ||
| const mockLogout = vi.fn(); | ||
|
|
||
| const defaultProps = { | ||
| user: { name: "Karuna" }, | ||
| onLogout: mockLogout, | ||
| }; |
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🛠️ Refactor suggestion | 🟠 Major
Add beforeEach to reset mocks between tests.
The mock function is defined at the suite level and could accumulate calls across tests, leading to test pollution. Reset mocks between tests for isolation.
🔎 Proposed fix
describe("Header component", () => {
const mockLogout = vi.fn();
const defaultProps = {
user: { name: "Karuna" },
onLogout: mockLogout,
};
+
+ beforeEach(() => {
+ vi.clearAllMocks();
+ });📝 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.
| describe("Header component", () => { | |
| const mockLogout = vi.fn(); | |
| const defaultProps = { | |
| user: { name: "Karuna" }, | |
| onLogout: mockLogout, | |
| }; | |
| describe("Header component", () => { | |
| const mockLogout = vi.fn(); | |
| const defaultProps = { | |
| user: { name: "Karuna" }, | |
| onLogout: mockLogout, | |
| }; | |
| beforeEach(() => { | |
| vi.clearAllMocks(); | |
| }); |
🤖 Prompt for AI Agents
In src/components/layout/Header/Header.test.tsx around lines 5 to 11, the
suite-level mockLogout can accumulate calls across tests; add a beforeEach
inside the describe to clear/reset mocks between tests (e.g., beforeEach(() => {
vi.clearAllMocks(); }) or beforeEach(() => { mockLogout.mockClear(); })) so each
test starts with a fresh mock and no cross-test pollution.
| it("renders the navbar container", () => { | ||
| render(<Header {...defaultProps} />); | ||
| expect(screen.getByRole("banner")).toBeInTheDocument(); | ||
| }); |
There was a problem hiding this comment.
Update test name to start with 'should'.
Test names should start with 'should' according to coding guidelines for better readability and consistency.
🔎 Proposed fix
- it("renders the navbar container", () => {
+ it("should render the navbar container", () => {Based on coding guidelines: "Use descriptive test names starting with 'should'"
📝 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.
| it("renders the navbar container", () => { | |
| render(<Header {...defaultProps} />); | |
| expect(screen.getByRole("banner")).toBeInTheDocument(); | |
| }); | |
| it("should render the navbar container", () => { | |
| render(<Header {...defaultProps} />); | |
| expect(screen.getByRole("banner")).toBeInTheDocument(); | |
| }); |
🤖 Prompt for AI Agents
In src/components/layout/Header/Header.test.tsx around lines 13 to 16, the test
name does not follow the guideline requiring test names to start with "should";
update the it(...) description to begin with "should" (e.g., change it("renders
the navbar container", ...) to it("should render the navbar container", ...) or
equivalent) and ensure punctuation/tense remains consistent.
| it("renders the app title", () => { | ||
| render(<Header {...defaultProps} />); | ||
| expect(screen.getByText("daisyUI")).toBeInTheDocument(); | ||
| }); |
There was a problem hiding this comment.
Update test name to start with 'should'.
Test names should start with 'should' according to coding guidelines.
🔎 Proposed fix
- it("renders the app title", () => {
+ it("should render the app title", () => {Based on coding guidelines: "Use descriptive test names starting with 'should'"
📝 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.
| it("renders the app title", () => { | |
| render(<Header {...defaultProps} />); | |
| expect(screen.getByText("daisyUI")).toBeInTheDocument(); | |
| }); | |
| it("should render the app title", () => { | |
| render(<Header {...defaultProps} />); | |
| expect(screen.getByText("daisyUI")).toBeInTheDocument(); | |
| }); |
🤖 Prompt for AI Agents
In src/components/layout/Header/Header.test.tsx around lines 18 to 21, the test
name does not follow the guideline requiring test names to start with "should";
update the it(...) description from "renders the app title" to start with
"should" (e.g., "should render the app title") and leave the test body unchanged
so the assertion and rendering logic remain the same.
| it("renders the hamburger menu link", () => { | ||
| render(<Header {...defaultProps} />); | ||
| const menuLink = screen.getAllByRole("link")[0]; | ||
| expect(menuLink).toHaveAttribute("href", "/"); | ||
| }); |
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Use accessible name to query the hamburger menu link and update test name.
Two issues:
- Test name should start with 'should'
- Using
getAllByRole("link")[0]with array indexing is fragile. UsegetByRolewith an accessible name or aria-label instead.
🔎 Proposed fix
- it("renders the hamburger menu link", () => {
+ it("should render the hamburger menu link", () => {
render(<Header {...defaultProps} />);
- const menuLink = screen.getAllByRole("link")[0];
+ const menuLink = screen.getByRole("link", { name: /menu/i });
expect(menuLink).toHaveAttribute("href", "/");
});Note: Adjust the accessible name pattern based on the actual implementation.
Based on coding guidelines: "Use semantic queries in order of preference: getByRole, getByLabelText, getByPlaceholderText, getByText, getByTestId (last resort)"
📝 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.
| it("renders the hamburger menu link", () => { | |
| render(<Header {...defaultProps} />); | |
| const menuLink = screen.getAllByRole("link")[0]; | |
| expect(menuLink).toHaveAttribute("href", "/"); | |
| }); | |
| it("should render the hamburger menu link", () => { | |
| render(<Header {...defaultProps} />); | |
| const menuLink = screen.getByRole("link", { name: /menu/i }); | |
| expect(menuLink).toHaveAttribute("href", "/"); | |
| }); |
🤖 Prompt for AI Agents
In src/components/layout/Header/Header.test.tsx around lines 23 to 27, the test
name and query are fragile: rename the test to start with "should" (e.g.,
"should render the hamburger menu link") and replace the brittle
getAllByRole("link")[0] indexing with getByRole("link", { name:
/hamburger|menu|open navigation/i }) or the actual aria-label used by the
component so the test targets the link by its accessible name; update the
expectation to check the href as before.
| it("renders profile button", () => { | ||
| render(<Header {...defaultProps} />); | ||
| expect(screen.getByRole("button")).toBeInTheDocument(); | ||
| }); |
There was a problem hiding this comment.
Use accessible name to query the profile button and update test name.
Two issues:
- Test name should start with 'should'
- Using
getByRole("button")without an accessible name is fragile if multiple buttons exist. Add an accessible name parameter.
🔎 Proposed fix
- it("renders profile button", () => {
+ it("should render profile button", () => {
render(<Header {...defaultProps} />);
- expect(screen.getByRole("button")).toBeInTheDocument();
+ expect(screen.getByRole("button", { name: /profile/i })).toBeInTheDocument();
});Note: Adjust the accessible name pattern based on the actual implementation.
Based on coding guidelines: "Use semantic queries in order of preference: getByRole, getByLabelText, getByPlaceholderText, getByText, getByTestId (last resort)"
📝 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.
| it("renders profile button", () => { | |
| render(<Header {...defaultProps} />); | |
| expect(screen.getByRole("button")).toBeInTheDocument(); | |
| }); | |
| it("should render profile button", () => { | |
| render(<Header {...defaultProps} />); | |
| expect(screen.getByRole("button", { name: /profile/i })).toBeInTheDocument(); | |
| }); |
🤖 Prompt for AI Agents
In src/components/layout/Header/Header.test.tsx around lines 29 to 32, the test
title and query are fragile: rename the test to start with "should" (e.g.,
"should render profile button") and replace the generic getByRole("button") call
with getByRole("button", { name: /profile/i }) or another appropriate accessible
name matcher that matches the component's accessible label; update the assertion
to use that query so the test targets the specific profile button and not any
button on the page.
| it("shows the first letter of the user's name in profile image", () => { | ||
| render(<Header {...defaultProps} />); | ||
| const profileImg = screen.getByAltText("Karuna profile"); | ||
| expect(profileImg).toHaveAttribute( | ||
| "src", | ||
| expect.stringContaining("K") | ||
| ); | ||
| }); |
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Avoid testing implementation details; update test name.
Two issues:
- Test name should start with 'should'
- Testing the
srcattribute value is an implementation detail. Users don't care about the src URL; they care about what's visible. The alt text verification is sufficient, or consider testing the visible content instead.
🔎 Proposed fix
- it("shows the first letter of the user's name in profile image", () => {
+ it("should show the user profile image with accessible name", () => {
render(<Header {...defaultProps} />);
const profileImg = screen.getByAltText("Karuna profile");
- expect(profileImg).toHaveAttribute(
- "src",
- expect.stringContaining("K")
- );
+ expect(profileImg).toBeInTheDocument();
});Based on coding guidelines: "Test user interactions, not implementation details"
🤖 Prompt for AI Agents
In src/components/layout/Header/Header.test.tsx around lines 34 to 41, rename
the test to start with "should" and remove the assertion that inspects the image
"src" (an implementation detail); instead assert what the user sees — either
rely on the existing alt-text assertion or check for the visible initial (e.g.,
that the profile element contains the letter "K" or that an element displaying
the initial is in the document). Update only the test name and assertions so
they verify visible output/alt text rather than the image URL.
| it("uses fallback text when user is undefined", () => { | ||
| render(<Header onLogout={mockLogout} />); | ||
| expect(screen.getByAltText("User profile")).toBeInTheDocument(); | ||
| }); |
There was a problem hiding this comment.
Update test name to start with 'should'.
Test names should start with 'should' according to coding guidelines.
🔎 Proposed fix
- it("uses fallback text when user is undefined", () => {
+ it("should use fallback text when user is undefined", () => {Based on coding guidelines: "Use descriptive test names starting with 'should'"
📝 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.
| it("uses fallback text when user is undefined", () => { | |
| render(<Header onLogout={mockLogout} />); | |
| expect(screen.getByAltText("User profile")).toBeInTheDocument(); | |
| }); | |
| it("should use fallback text when user is undefined", () => { | |
| render(<Header onLogout={mockLogout} />); | |
| expect(screen.getByAltText("User profile")).toBeInTheDocument(); | |
| }); |
🤖 Prompt for AI Agents
In src/components/layout/Header/Header.test.tsx around lines 43 to 46, the test
name "uses fallback text when user is undefined" does not follow the guideline
that test names start with 'should'; update the it(...) description to begin
with 'should' and keep the rest of the phrasing (e.g., change to "should use
fallback text when user is undefined") so the test name remains descriptive and
compliant with the coding guidelines.
| it("calls onLogout when profile button is clicked", () => { | ||
| render(<Header {...defaultProps} />); | ||
| const profileButton = screen.getByRole("button"); | ||
|
|
||
| fireEvent.click(profileButton); | ||
|
|
||
| expect(mockLogout).toHaveBeenCalledOnce(); | ||
| }); |
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Use userEvent with async/await for user interactions; improve query and test name.
Multiple issues:
- Test name should start with 'should'
- Must use
userEvent.click()instead offireEvent.click()per coding guidelines - Must use async/await with user events
- Query should include accessible name for reliability
🔎 Proposed fix
- it("calls onLogout when profile button is clicked", () => {
+ it("should call onLogout when profile button is clicked", async () => {
+ const user = userEvent.setup();
render(<Header {...defaultProps} />);
- const profileButton = screen.getByRole("button");
+ const profileButton = screen.getByRole("button", { name: /profile/i });
- fireEvent.click(profileButton);
+ await user.click(profileButton);
expect(mockLogout).toHaveBeenCalledOnce();
});Note: Adjust the accessible name pattern based on the actual implementation.
Based on coding guidelines: "Use @testing-library/user-event for user interactions in tests" and "Always use async/await with user events in tests"
🤖 Prompt for AI Agents
In src/components/layout/Header/Header.test.tsx around lines 48-55, the test
should be renamed to start with "should", use @testing-library/user-event with
async/await, and query the button by accessible name for reliability; update the
test to import userEvent, await userEvent.click(screen.getByRole('button', {
name: /profile/i })), and assert the logout mock was called (preferably
toHaveBeenCalledTimes(1)); adjust the accessible name regex to match the actual
label in the Header component.
Summary by CodeRabbit
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