Update dependency tailwindcss to v4

.drone.yml

@@ -27,6 +27,33 @@ steps:
       commands:
           - yarn build
 
+    - name: unit-tests
+      image: node:25
+      environment:
+          NODE_OPTIONS: --no-webstorage
+      commands:
+          - yarn test:coverage
+          - test -f coverage/lcov.info
+
+    - name: code-analysis
+      when:
+        event:
+          - push
+      image: sonarsource/sonar-scanner-cli:latest
+      commands:
+        - |
+          test -f coverage/lcov.info
+          SONAR_ARGS="-Dsonar.projectKey=$SONAR_PROJECT_KEY -Dsonar.host.url=$SONAR_INSTANCE_URL -Dsonar.token=$SONAR_LOGIN_KEY -Dsonar.sources=src -Dsonar.tests=tests -Dsonar.test.inclusions=tests/**/*.{test,spec}.{ts,tsx,js,jsx} -Dsonar.javascript.lcov.reportPaths=coverage/lcov.info -Dsonar.working.directory=/tmp/.scannerwork"
+          sonar-scanner $SONAR_ARGS
+      environment:
+        SONAR_USER_HOME: /tmp/.sonar
+        SONAR_PROJECT_KEY:
+          from_secret: sonar_project_key
+        SONAR_INSTANCE_URL:
+          from_secret: sonar_instance_url
+        SONAR_LOGIN_KEY:
+          from_secret: sonar_login_key
+
 ---
 kind: pipeline
 type: docker

eslint.config.mjs

@@ -45,4 +45,14 @@ export default tseslint.config(
             'react-refresh/only-export-components': ['warn', { allowConstantExport: true }],
         },
     },
+    {
+        files: ['tests/**/*.{ts,tsx}'],
+        languageOptions: {
+            globals: {
+                ...globals.browser,
+                ...globals.node,
+                ...globals.vitest,
+            },
+        },
+    },
 );

package.json

@@ -27,6 +27,9 @@
     "scripts": {
         "clean": "rm -rf dist",
         "build": "yarn clean && vite build && tsc -p tsconfig.build.json && mkdir -p dist/styles && cp src/styles/base.css dist/styles/base.css && tailwindcss -c tailwind.build.config.cjs -i src/styles/components.css -o dist/styles/components.css --minify && tailwindcss -c tailwind.build.config.cjs -i src/styles/utilities.css -o dist/styles/utilities.css --minify && cp tailwind-preset.cjs dist/tailwind-preset.cjs",
+        "test": "vitest run",
+        "test:coverage": "vitest run --coverage --coverage.reporter=lcov --coverage.reporter=text-summary",
+        "test:watch": "vitest",
         "lint": "eslint .",
         "lint:fix": "eslint . --fix",
         "format": "prettier . --write",
@@ -64,23 +67,28 @@
         "@storybook/react": "^10.2.10",
         "@storybook/react-vite": "^10.2.10",
         "@testing-library/dom": "^10.4.1",
+        "@testing-library/jest-dom": "^6.9.1",
+        "@testing-library/react": "^16.3.0",
         "@types/react": "^19.0.0",
         "@types/react-dom": "^19.0.0",
         "@vitejs/plugin-react": "^5.0.0",
+        "@vitest/coverage-v8": "^4.0.18",
         "eslint": "^10",
-        "eslint-plugin-react-hooks": "^7.0.1",
+        "eslint-plugin-react-hooks": "^7.1.0-canary-ab18f33d-20260220",
         "eslint-plugin-react-refresh": "^0.5.1",
         "globals": "^17.3.0",
+        "jsdom": "^28.1.0",
         "postcss": "^8.4.49",
         "prettier": "^3.8.1",
         "react": "^19.0.0",
         "react-dom": "^19.0.0",
         "react-router-dom": "^7.0.0",
         "storybook": "^10.2.10",
-        "tailwindcss": "^3.4.16",
+        "tailwindcss": "^4.0.0",
         "typescript": "^5.6.2",
         "typescript-eslint": "^8.56.0",
         "vite": "^7.0.0",
+        "vitest": "^4.0.18",
         "yjs": "^13.6.24"
     }
 }

src/styles/components.css

@@ -30,80 +30,6 @@
     -webkit-text-fill-color: var(--field-selection-text);
 }
 
-.field[type='date']::-webkit-datetime-edit-day-field,
-.field[type='date']::-webkit-datetime-edit-month-field,
-.field[type='date']::-webkit-datetime-edit-year-field,
-.field[type='time']::-webkit-datetime-edit-hour-field,
-.field[type='time']::-webkit-datetime-edit-minute-field,
-.field[type='datetime-local']::-webkit-datetime-edit-day-field,
-.field[type='datetime-local']::-webkit-datetime-edit-month-field,
-.field[type='datetime-local']::-webkit-datetime-edit-year-field,
-.field[type='datetime-local']::-webkit-datetime-edit-hour-field,
-.field[type='datetime-local']::-webkit-datetime-edit-minute-field {
-    border-radius: 0.375rem;
-}
-
-.field[type='date']::-webkit-datetime-edit-day-field:focus {
-    border-radius: 0.375rem;
-    background-color: var(--field-selection-bg) !important;
-    color: var(--field-selection-text) !important;
-    -webkit-text-fill-color: var(--field-selection-text) !important;
-}
-.field[type='date']::-webkit-datetime-edit-month-field:focus {
-    border-radius: 0.375rem;
-    background-color: var(--field-selection-bg) !important;
-    color: var(--field-selection-text) !important;
-    -webkit-text-fill-color: var(--field-selection-text) !important;
-}
-.field[type='date']::-webkit-datetime-edit-year-field:focus {
-    border-radius: 0.375rem;
-    background-color: var(--field-selection-bg) !important;
-    color: var(--field-selection-text) !important;
-    -webkit-text-fill-color: var(--field-selection-text) !important;
-}
-.field[type='time']::-webkit-datetime-edit-hour-field:focus {
-    border-radius: 0.375rem;
-    background-color: var(--field-selection-bg) !important;
-    color: var(--field-selection-text) !important;
-    -webkit-text-fill-color: var(--field-selection-text) !important;
-}
-.field[type='time']::-webkit-datetime-edit-minute-field:focus {
-    border-radius: 0.375rem;
-    background-color: var(--field-selection-bg) !important;
-    color: var(--field-selection-text) !important;
-    -webkit-text-fill-color: var(--field-selection-text) !important;
-}
-.field[type='datetime-local']::-webkit-datetime-edit-day-field:focus {
-    border-radius: 0.375rem;
-    background-color: var(--field-selection-bg) !important;
-    color: var(--field-selection-text) !important;
-    -webkit-text-fill-color: var(--field-selection-text) !important;
-}
-.field[type='datetime-local']::-webkit-datetime-edit-month-field:focus {
-    border-radius: 0.375rem;
-    background-color: var(--field-selection-bg) !important;
-    color: var(--field-selection-text) !important;
-    -webkit-text-fill-color: var(--field-selection-text) !important;
-}
-.field[type='datetime-local']::-webkit-datetime-edit-year-field:focus {
-    border-radius: 0.375rem;
-    background-color: var(--field-selection-bg) !important;
-    color: var(--field-selection-text) !important;
-    -webkit-text-fill-color: var(--field-selection-text) !important;
-}
-.field[type='datetime-local']::-webkit-datetime-edit-hour-field:focus {
-    border-radius: 0.375rem;
-    background-color: var(--field-selection-bg) !important;
-    color: var(--field-selection-text) !important;
-    -webkit-text-fill-color: var(--field-selection-text) !important;
-}
-.field[type='datetime-local']::-webkit-datetime-edit-minute-field:focus {
-    border-radius: 0.375rem;
-    background-color: var(--field-selection-bg) !important;
-    color: var(--field-selection-text) !important;
-    -webkit-text-fill-color: var(--field-selection-text) !important;
-}
-
 .field:disabled {
     border-color: var(--field-disabled-border);
     background-color: var(--field-disabled-bg);

tests/components/Button.test.tsx

@@ -0,0 +1,71 @@
+import { HomeIcon } from '@heroicons/react/24/solid';
+import { fireEvent, render, screen } from '@testing-library/react';
+import { describe, expect, it, vi } from 'vitest';
+import { Button } from '../../src/components/Button';
+import { renderWithRouter } from '../helpers/renderWithRouter';
+
+describe('Button', () => {
+    it('renders native button with expected type and disabled state', () => {
+        render(<Button label="Save" type="solid" htmlType="submit" disabled />);
+
+        const button = screen.getByRole('button', { name: 'Save' });
+        expect(button.tagName).toBe('BUTTON');
+        expect(button).toHaveAttribute('type', 'submit');
+        expect(button).toBeDisabled();
+        expect(button).toHaveClass('btn-solid');
+        expect(button).toHaveClass('btn-primary');
+    });
+
+    it('defaults non-solid button variants to secondary', () => {
+        render(<Button label="Details" type="noborder" />);
+        expect(screen.getByRole('button', { name: 'Details' })).toHaveClass('btn-secondary');
+    });
+
+    it('renders icon-only button and custom aria label', () => {
+        render(<Button type="solid" icon={HomeIcon} ariaLabel="Open home" />);
+
+        const button = screen.getByRole('button', { name: 'Open home' });
+        expect(button).toBeInTheDocument();
+        expect(button).toHaveClass('!p-0');
+        expect(button.textContent).toBe('');
+    });
+
+    it('renders link button and prevents click when disabled', () => {
+        const onClick = vi.fn();
+        renderWithRouter(
+            <Button label="Go home" type="outlined" to="/home" onClick={onClick} disabled />,
+        );
+
+        const link = screen.getByRole('link', { name: 'Go home' });
+        fireEvent.click(link);
+
+        expect(link).toHaveAttribute('aria-disabled', 'true');
+        expect(link).toHaveAttribute('tabindex', '-1');
+        expect(onClick).not.toHaveBeenCalled();
+    });
+
+    it('calls onClick for enabled link buttons', () => {
+        const onClick = vi.fn();
+        renderWithRouter(<Button label="Profile" type="solid" to="/profile" onClick={onClick} />);
+
+        fireEvent.click(screen.getByRole('link', { name: 'Profile' }));
+        expect(onClick).toHaveBeenCalledTimes(1);
+    });
+
+    it('renders icon+label spacing and custom class names', () => {
+        render(
+            <Button
+                label="Home"
+                type="outlined"
+                icon={HomeIcon}
+                className="custom-button"
+                width="full"
+            />,
+        );
+
+        const button = screen.getByRole('button', { name: 'Home' });
+        expect(button).toHaveClass('gap-1.5');
+        expect(button).toHaveClass('custom-button');
+        expect(button).toHaveClass('w-full');
+    });
+});

tests/components/Chip.test.tsx

@@ -0,0 +1,54 @@
+import { render, screen } from '@testing-library/react';
+import { describe, expect, it } from 'vitest';
+import { Chip } from '../../src/components/Chip';
+
+describe('Chip', () => {
+    it('renders default span with solid classes', () => {
+        render(<Chip>Default</Chip>);
+
+        const chip = screen.getByText('Default');
+        expect(chip.tagName).toBe('SPAN');
+        expect(chip.className).toContain('chip-solid');
+    });
+
+    it('supports outlined variant with valid tone', () => {
+        render(
+            <Chip as="div" variant="outlined" tone="indigo-700">
+                Custom
+            </Chip>,
+        );
+
+        const chip = screen.getByText('Custom');
+        expect(chip.tagName).toBe('DIV');
+        expect(chip.className).toContain('chip-outlined');
+        expect(chip).toHaveStyle({
+            borderColor: 'rgb(67, 56, 202)',
+            color: 'rgb(67, 56, 202)',
+        });
+    });
+
+    it('supports direct tone tokens without shades for solid variant', () => {
+        render(<Chip tone="white">Solid</Chip>);
+
+        expect(screen.getByText('Solid')).toHaveStyle({
+            borderColor: 'rgb(255, 255, 255)',
+            backgroundColor: 'rgb(255, 255, 255)',
+            color: 'rgb(255, 255, 255)',
+        });
+    });
+
+    it('ignores invalid/empty tones and keeps className', () => {
+        const { rerender } = render(
+            <Chip tone="not-a-token" className="chip-custom">
+                Invalid
+            </Chip>,
+        );
+
+        const invalid = screen.getByText('Invalid');
+        expect(invalid).toHaveClass('chip-custom');
+        expect(invalid.getAttribute('style')).toBeNull();
+
+        rerender(<Chip tone="   ">Blank</Chip>);
+        expect(screen.getByText('Blank').getAttribute('style')).toBeNull();
+    });
+});

tests/components/DatePicker.test.tsx

@@ -0,0 +1,62 @@
+import { fireEvent, render, screen } from '@testing-library/react';
+import { describe, expect, it, vi } from 'vitest';
+import { DatePicker } from '../../src/components/DatePicker';
+
+describe('DatePicker', () => {
+    it('supports datetime-local type and change callback', () => {
+        const onChange = vi.fn();
+        render(<DatePicker label="Schedule" type="datetime-local" value="" onChange={onChange} />);
+
+        const input = screen.getByLabelText('Schedule') as HTMLInputElement;
+        expect(input.type).toBe('datetime-local');
+
+        fireEvent.change(input, { target: { value: '2031-05-20T14:30' } });
+        expect(onChange).toHaveBeenCalledTimes(1);
+    });
+
+    it('supports date type and disabled state', () => {
+        render(
+            <DatePicker
+                label="Publish date"
+                type="date"
+                value="2031-05-20"
+                onChange={() => {}}
+                disabled
+            />,
+        );
+
+        const input = screen.getByLabelText('Publish date') as HTMLInputElement;
+        expect(input.type).toBe('date');
+        expect(input).toBeDisabled();
+    });
+
+    it('renders right icon and error message', () => {
+        const { container } = render(
+            <DatePicker
+                label="Schedule"
+                type="datetime-local"
+                value=""
+                onChange={() => {}}
+                rightIcon={<span data-testid="right-icon">R</span>}
+                error="Invalid date"
+                inputClassName="custom-input"
+            />,
+        );
+
+        const input = container.querySelector('input');
+        expect(input).toBeInstanceOf(HTMLInputElement);
+        expect(screen.getByTestId('right-icon')).toBeInTheDocument();
+        expect(input).toHaveClass('pr-10');
+        expect(input).toHaveClass('custom-input');
+        expect(screen.getByText('Invalid date')).toBeInTheDocument();
+    });
+
+    it('supports inline layout', () => {
+        const { container } = render(
+            <DatePicker label="Start time" type="time" value="09:00" onChange={() => {}} layout="inline" />,
+        );
+
+        expect(container.querySelector('label')).toHaveClass('inline-flex');
+        expect(container.querySelector('label > div')).not.toHaveClass('mt-1');
+    });
+});

tests/components/Dropdown.test.tsx

@@ -0,0 +1,55 @@
+import { fireEvent, render, screen } from '@testing-library/react';
+import { describe, expect, it, vi } from 'vitest';
+import { Dropdown } from '../../src/components/Dropdown';
+
+const choices = [
+    { id: 'USER', label: 'User' },
+    { id: 'ADMIN', label: 'Admin' },
+];
+
+describe('Dropdown', () => {
+    it('calls onChange with selected value', () => {
+        const onChange = vi.fn();
+        render(<Dropdown label="Role" value="USER" choices={choices} onChange={onChange} />);
+
+        fireEvent.change(screen.getByLabelText('Role'), { target: { value: 'ADMIN' } });
+        expect(onChange).toHaveBeenCalledWith('ADMIN');
+    });
+
+    it('supports inline layout and disabled/required state', () => {
+        const { container } = render(
+            <Dropdown
+                label="Rows"
+                value="10"
+                choices={[{ id: '10', label: '10' }]}
+                layout="inline"
+                disabled
+                required
+            />,
+        );
+
+        const select = screen.getByLabelText('Rows');
+        expect(select).toBeDisabled();
+        expect(select).toBeRequired();
+        expect(container.querySelector('label')).toHaveClass('inline-flex');
+    });
+
+    it('renders error and custom class names', () => {
+        const { container } = render(
+            <Dropdown
+                label="Role"
+                value="USER"
+                choices={choices}
+                error="Role is invalid"
+                className="custom-wrapper"
+                selectClassName="custom-select"
+            />,
+        );
+
+        const select = container.querySelector('select');
+        expect(select).toBeInstanceOf(HTMLSelectElement);
+        expect(screen.getByText('Role is invalid')).toBeInTheDocument();
+        expect(select).toHaveClass('custom-select');
+        expect(screen.getByText('Role').closest('label')).toHaveClass('custom-wrapper');
+    });
+});

tests/components/Form.test.tsx

@@ -0,0 +1,28 @@
+import { render, screen } from '@testing-library/react';
+import { describe, expect, it } from 'vitest';
+import { Form } from '../../src/components/Form';
+
+describe('Form', () => {
+    it('renders title, title actions and children', () => {
+        render(
+            <Form title="User Details" titleBarRight={<button type="button">Action</button>}>
+                <div>Form child</div>
+            </Form>,
+        );
+
+        expect(screen.getByText('User Details')).toBeInTheDocument();
+        expect(screen.getByRole('button', { name: 'Action' })).toBeInTheDocument();
+        expect(screen.getByText('Form child')).toBeInTheDocument();
+    });
+
+    it('supports custom class names and optional title actions', () => {
+        const { container } = render(
+            <Form title="No Actions" className="form-custom">
+                <div>Child</div>
+            </Form>,
+        );
+
+        expect(container.firstElementChild).toHaveClass('form-custom');
+        expect(screen.queryByRole('button')).not.toBeInTheDocument();
+    });
+});

tests/components/InputField.test.tsx

@@ -0,0 +1,92 @@
+import { fireEvent, render, screen } from '@testing-library/react';
+import { createRef } from 'react';
+import { describe, expect, it, vi } from 'vitest';
+import { InputField } from '../../src/components/InputField';
+
+describe('InputField', () => {
+    it('supports email type and emits change/blur callbacks', () => {
+        const onChange = vi.fn();
+        const onBlur = vi.fn();
+        render(
+            <InputField
+                label="Email"
+                type="email"
+                value=""
+                onChange={onChange}
+                onBlur={onBlur}
+                required
+            />,
+        );
+
+        const input = screen.getByLabelText('Email') as HTMLInputElement;
+        expect(input.type).toBe('email');
+        expect(input).toBeRequired();
+
+        fireEvent.change(input, { target: { value: 'new@example.com' } });
+        fireEvent.blur(input);
+        expect(onChange).toHaveBeenCalledTimes(1);
+        expect(onBlur).toHaveBeenCalledTimes(1);
+    });
+
+    it('passes refs to input element', () => {
+        const inputRef = createRef<HTMLInputElement>();
+        render(<InputField label="Username" type="text" value="john" onChange={() => {}} inputRef={inputRef} />);
+
+        expect(inputRef.current).toBeInstanceOf(HTMLInputElement);
+        expect(inputRef.current?.value).toBe('john');
+    });
+
+    it('toggles password visibility', () => {
+        render(<InputField label="Password" type="password" value="abc" onChange={() => {}} />);
+
+        expect((screen.getByLabelText('Password') as HTMLInputElement).type).toBe('password');
+        fireEvent.click(screen.getByRole('button', { name: 'Show password' }));
+        expect((screen.getByLabelText('Password') as HTMLInputElement).type).toBe('text');
+        fireEvent.click(screen.getByRole('button', { name: 'Hide password' }));
+        expect((screen.getByLabelText('Password') as HTMLInputElement).type).toBe('password');
+    });
+
+    it('renders rightIcon for non-password input and displays errors', () => {
+        const { container } = render(
+            <InputField
+                label="Username"
+                type="text"
+                value="john"
+                onChange={() => {}}
+                rightIcon={<span data-testid="right-icon">R</span>}
+                error="Invalid username"
+                inputClassName="custom-input"
+            />,
+        );
+
+        const input = container.querySelector('input');
+        expect(input).toBeInstanceOf(HTMLInputElement);
+        expect(input).toHaveClass('pr-10');
+        expect(input).toHaveClass('custom-input');
+        expect(screen.getByTestId('right-icon')).toBeInTheDocument();
+        expect(screen.getByText('Invalid username')).toBeInTheDocument();
+    });
+
+    it('disables password toggle when input is disabled', () => {
+        render(
+            <InputField
+                label="Password"
+                type="password"
+                value="secret"
+                onChange={() => {}}
+                disabled
+            />,
+        );
+
+        expect(screen.getByRole('button', { name: 'Show password' })).toBeDisabled();
+    });
+
+    it('supports inline layout classes', () => {
+        const { container } = render(
+            <InputField label="Username" type="text" value="" onChange={() => {}} layout="inline" />,
+        );
+
+        expect(container.querySelector('label')).toHaveClass('inline-flex');
+        expect(container.querySelector('label > div')).not.toHaveClass('mt-1');
+    });
+});

tests/components/Label.test.tsx

@@ -0,0 +1,25 @@
+import { render, screen } from '@testing-library/react';
+import { describe, expect, it } from 'vitest';
+import { Label } from '../../src/components/Label';
+
+describe('Label', () => {
+    it('uses default and variant-specific tags/classes', () => {
+        const { rerender } = render(<Label>Body</Label>);
+        expect(screen.getByText('Body').tagName).toBe('P');
+        expect(screen.getByText('Body')).toHaveClass('ui-body-primary');
+
+        rerender(<Label variant="h1">Title</Label>);
+        expect(screen.getByText('Title').tagName).toBe('H1');
+        expect(screen.getByText('Title')).toHaveClass('ui-title');
+
+        rerender(<Label variant="h4">Section</Label>);
+        expect(screen.getByText('Section').tagName).toBe('H3');
+
+        rerender(
+            <Label variant="h2" as="span">
+                Custom
+            </Label>,
+        );
+        expect(screen.getByText('Custom').tagName).toBe('SPAN');
+    });
+});

tests/components/MDXEditorField.test.tsx

@@ -0,0 +1,82 @@
+import { fireEvent, render, screen } from '@testing-library/react';
+import { describe, expect, it, vi } from 'vitest';
+import { MDXEditorField } from '../../src/components/MDXEditorField';
+
+describe('MDXEditorField', () => {
+    it('renders label and change handler in editable mode', () => {
+        const onChange = vi.fn();
+
+        render(
+            <MDXEditorField
+                label="Content"
+                markdown=""
+                onChange={onChange}
+                themeClassName="light-theme"
+                editorClassName="extra-editor"
+                plugins={[]}
+            />,
+        );
+
+        expect(screen.getByText('Content')).toHaveClass('ui-label');
+        fireEvent.change(screen.getByLabelText('Markdown Editor'), {
+            target: { value: '# Hello' },
+        });
+        expect(onChange).toHaveBeenCalledWith('# Hello');
+        expect(screen.getByLabelText('Markdown Editor')).toHaveAttribute(
+            'data-class-name',
+            'light-theme extra-editor',
+        );
+    });
+
+    it('renders preview and disabled classes when disabled', () => {
+        render(
+            <MDXEditorField
+                label="Content"
+                markdown="Disabled content"
+                disabled
+                themeClassName="dark-theme"
+                plugins={[]}
+            />,
+        );
+
+        const label = screen.getByText('Content');
+        expect(label).toHaveClass('ui-label-disabled');
+        expect(screen.getByTestId('md-preview')).toHaveTextContent('Disabled content');
+        expect(screen.getByTestId('md-preview')).toHaveAttribute('data-class-name', 'dark-theme');
+        expect(screen.queryByLabelText('Markdown Editor')).not.toBeInTheDocument();
+        expect(document.querySelector('.post-mdx-editor--disabled')).toBeTruthy();
+    });
+
+    it('renders read-only preview without label when label is omitted', () => {
+        render(
+            <MDXEditorField
+                markdown="Read only content"
+                readOnly
+                themeClassName="dark-theme"
+                plugins={[]}
+            />,
+        );
+
+        expect(screen.queryByText('Content')).not.toBeInTheDocument();
+        expect(screen.getByTestId('md-preview')).toHaveTextContent('Read only content');
+    });
+
+    it('supports wrapper style/class overrides and error rendering', () => {
+        render(
+            <MDXEditorField
+                label="Content"
+                markdown=""
+                themeClassName="light-theme"
+                plugins={[]}
+                editorWrapperClassName="editor-wrapper"
+                editorWrapperStyle={{ borderWidth: '2px' }}
+                error="Content is required"
+            />,
+        );
+
+        const wrapper = document.querySelector('.editor-wrapper');
+        expect(wrapper).toHaveClass('post-mdx-editor--enabled');
+        expect(wrapper).toHaveStyle({ borderWidth: '2px' });
+        expect(screen.getByText('Content is required')).toHaveClass('ui-error');
+    });
+});

tests/components/SidebarNavItem.test.tsx

@@ -0,0 +1,55 @@
+import { UserCircleIcon } from '@heroicons/react/24/outline';
+import { fireEvent, screen } from '@testing-library/react';
+import { Route, Routes } from 'react-router-dom';
+import { describe, expect, it, vi } from 'vitest';
+import { SidebarNavItem } from '../../src/components/SidebarNavItem';
+import { renderWithRouter } from '../helpers/renderWithRouter';
+
+describe('SidebarNavItem', () => {
+    it('renders active style and collapsed label behavior', () => {
+        renderWithRouter(
+            <Routes>
+                <Route
+                    path="/users"
+                    element={<SidebarNavItem to="/users" label="Users" icon={UserCircleIcon} collapsed />}
+                />
+            </Routes>,
+            { route: '/users' },
+        );
+
+        const link = screen.getByRole('link', { name: 'Users' });
+        expect(link.className).toContain('ui-accent-active');
+        expect(link.className).toContain('mx-auto');
+        expect(screen.getByText('Users').className).toContain('lg:hidden');
+    });
+
+    it('renders inactive style and triggers onClick', () => {
+        const onClick = vi.fn();
+        renderWithRouter(
+            <Routes>
+                <Route path="/users" element={<div>Users page</div>} />
+                <Route
+                    path="/profile"
+                    element={
+                        <SidebarNavItem
+                            to="/users"
+                            label="Users"
+                            icon={UserCircleIcon}
+                            collapsed={false}
+                            onClick={onClick}
+                        />
+                    }
+                />
+            </Routes>,
+            { route: '/profile' },
+        );
+
+        const link = screen.getByRole('link', { name: 'Users' });
+        expect(link.className).toContain('hover:bg-zinc-500/15');
+        expect(link.className).toContain('lg:w-full');
+        expect(screen.getByText('Users').className).toContain('truncate');
+
+        fireEvent.click(link);
+        expect(onClick).toHaveBeenCalledTimes(1);
+    });
+});

tests/components/Table.test.tsx

@@ -0,0 +1,199 @@
+import { fireEvent, render, screen } from '@testing-library/react';
+import { describe, expect, it, vi } from 'vitest';
+import { Table, type TableHeader } from '../../src/components/Table';
+import type { SortState } from '../../src/types/sort';
+
+type Row = {
+    id: string;
+    name: string;
+    email: string;
+};
+
+const headers: TableHeader<Row>[] = [
+    { label: 'Name', id: 'name', value: (row) => row.name, headerClassName: 'head-name' },
+    { label: 'Email', id: 'email', value: (row) => row.email, cellClassName: 'cell-email' },
+    { label: 'Static', id: 'static', value: 'Always', sortable: false },
+];
+
+const data: Row[] = [{ id: '1', name: 'Jane', email: 'jane@example.com' }];
+
+describe('Table', () => {
+    it('renders loading state', () => {
+        render(<Table headers={headers} data={[]} isLoading rowKey={(row) => row.id} />);
+
+        expect(document.querySelector('.animate-spin')).toBeTruthy();
+    });
+
+    it('renders empty state message when no rows are available', () => {
+        render(
+            <Table
+                headers={headers}
+                data={[]}
+                emptyMessage="Nothing here"
+                rowKey={(row) => row.id}
+            />,
+        );
+
+        expect(screen.getByText('Nothing here')).toBeInTheDocument();
+    });
+
+    it('renders row values from function and static header values', () => {
+        const rowKey = vi.fn((row: Row) => row.id);
+        render(<Table headers={headers} data={data} rowKey={rowKey} />);
+
+        expect(screen.getByText('Jane')).toBeInTheDocument();
+        expect(screen.getByText('jane@example.com')).toBeInTheDocument();
+        expect(screen.getByText('Always')).toBeInTheDocument();
+        expect(screen.getByText('Name').closest('th')).toHaveClass('head-name');
+        expect(screen.getByText('jane@example.com').closest('td')).toHaveClass('cell-email');
+        expect(rowKey).toHaveBeenCalledWith(data[0], 0);
+    });
+
+    it('shows sortable buttons only when sort config is complete', () => {
+        const onSortChange = vi.fn();
+        const sortableHeaders: TableHeader<Row>[] = [
+            { label: 'No field', id: 'a', sortable: true, value: (row) => row.name },
+            { label: 'Empty field', id: 'b', sortable: true, sortField: '', value: (row) => row.name },
+            { label: 'Name', id: 'c', sortable: true, sortField: 'name', value: (row) => row.name },
+        ];
+
+        const { rerender } = render(
+            <Table headers={sortableHeaders} data={data} rowKey={(row) => row.id} onSortChange={onSortChange} />,
+        );
+
+        expect(screen.queryByRole('button', { name: 'Sort by No field' })).not.toBeInTheDocument();
+        expect(screen.queryByRole('button', { name: 'Sort by Empty field' })).not.toBeInTheDocument();
+        expect(screen.getByRole('button', { name: 'Sort by Name' })).toBeInTheDocument();
+
+        rerender(<Table headers={sortableHeaders} data={data} rowKey={(row) => row.id} />);
+        expect(screen.queryByRole('button', { name: 'Sort by Name' })).not.toBeInTheDocument();
+    });
+
+    it('renders sort states and notifies callback on header click', () => {
+        const onSortChange = vi.fn();
+        const sortableHeaders: TableHeader<Row>[] = [
+            { label: 'Name', id: 'name', sortable: true, sortField: 'name', value: (row) => row.name },
+            { label: 'Email', id: 'email', sortable: true, sortField: 'email', value: (row) => row.email },
+        ];
+        const sorting: SortState = { field: 'name', direction: 'asc' };
+
+        const { rerender } = render(
+            <Table
+                headers={sortableHeaders}
+                data={data}
+                rowKey={(row) => row.id}
+                sorting={sorting}
+                onSortChange={onSortChange}
+            />,
+        );
+
+        const nameSort = screen.getByRole('button', { name: 'Sort by Name' });
+        const emailSort = screen.getByRole('button', { name: 'Sort by Email' });
+        expect(nameSort.querySelector('[data-sort-state]')).toHaveAttribute('data-sort-state', 'asc');
+        expect(emailSort.querySelector('[data-sort-state]')).toHaveAttribute('data-sort-state', 'none');
+
+        fireEvent.click(nameSort);
+        expect(onSortChange).toHaveBeenCalledWith('name');
+
+        rerender(
+            <Table
+                headers={sortableHeaders}
+                data={data}
+                rowKey={(row) => row.id}
+                sorting={{ field: 'name', direction: 'desc' }}
+                onSortChange={onSortChange}
+            />,
+        );
+        expect(nameSort.querySelector('[data-sort-state]')).toHaveAttribute('data-sort-state', 'desc');
+    });
+
+    it('supports pagination controls and page-size changes', () => {
+        const onPageChange = vi.fn();
+        const onPageSizeChange = vi.fn();
+
+        render(
+            <Table
+                headers={headers}
+                data={data}
+                rowKey={(row) => row.id}
+                pagination={{
+                    page: 2,
+                    pageSize: 10,
+                    total: 21,
+                    totalPages: 3,
+                    onPageChange,
+                    onPageSizeChange,
+                }}
+            />,
+        );
+
+        fireEvent.click(screen.getByRole('button', { name: 'Previous page' }));
+        fireEvent.click(screen.getByRole('button', { name: 'Next page' }));
+        fireEvent.change(screen.getByLabelText('Rows'), { target: { value: '20' } });
+
+        expect(onPageChange).toHaveBeenNthCalledWith(1, 1);
+        expect(onPageChange).toHaveBeenNthCalledWith(2, 3);
+        expect(onPageSizeChange).toHaveBeenCalledWith(20);
+    });
+
+    it('hides rows selector when onPageSizeChange is absent and clamps page count display', () => {
+        render(
+            <Table
+                headers={headers}
+                data={data}
+                rowKey={(row) => row.id}
+                pagination={{
+                    page: 1,
+                    pageSize: 10,
+                    total: 1,
+                    totalPages: 0,
+                    onPageChange: vi.fn(),
+                }}
+            />,
+        );
+
+        expect(screen.queryByLabelText('Rows')).not.toBeInTheDocument();
+        expect(screen.getByText('Page 1 of 1')).toBeInTheDocument();
+    });
+
+    it('disables prev/next at bounds or while loading', () => {
+        const { rerender } = render(
+            <Table
+                headers={headers}
+                data={data}
+                rowKey={(row) => row.id}
+                pagination={{
+                    page: 1,
+                    pageSize: 10,
+                    total: 10,
+                    totalPages: 1,
+                    onPageChange: vi.fn(),
+                }}
+            />,
+        );
+
+        expect(screen.getByRole('button', { name: 'Previous page' })).toBeDisabled();
+        expect(screen.getByRole('button', { name: 'Next page' })).toBeDisabled();
+
+        rerender(
+            <Table
+                headers={headers}
+                data={data}
+                rowKey={(row) => row.id}
+                isLoading
+                pagination={{
+                    page: 2,
+                    pageSize: 10,
+                    total: 100,
+                    totalPages: 10,
+                    onPageChange: vi.fn(),
+                    onPageSizeChange: vi.fn(),
+                }}
+            />,
+        );
+
+        expect(screen.getByRole('button', { name: 'Previous page' })).toBeDisabled();
+        expect(screen.getByRole('button', { name: 'Next page' })).toBeDisabled();
+        expect(screen.getByLabelText('Rows')).toBeDisabled();
+    });
+});

tests/helpers/renderWithRouter.tsx

@@ -0,0 +1,12 @@
+import type { ReactElement } from 'react';
+import { MemoryRouter } from 'react-router-dom';
+import { render } from '@testing-library/react';
+
+type RenderWithRouterOptions = {
+    route?: string;
+};
+
+export function renderWithRouter(ui: ReactElement, options: RenderWithRouterOptions = {}) {
+    const { route = '/' } = options;
+    return render(<MemoryRouter initialEntries={[route]}>{ui}</MemoryRouter>);
+}

tests/index.test.ts

@@ -0,0 +1,16 @@
+import { describe, expect, it } from 'vitest';
+import * as webUi from '../src/index';
+
+describe('index exports', () => {
+    it('exposes runtime component exports', () => {
+        expect(typeof webUi.Button).toBe('function');
+        expect(typeof webUi.Chip).toBe('function');
+        expect(typeof webUi.DatePicker).toBe('function');
+        expect(typeof webUi.Dropdown).toBe('function');
+        expect(typeof webUi.Form).toBe('function');
+        expect(typeof webUi.InputField).toBe('function');
+        expect(typeof webUi.Label).toBe('function');
+        expect(typeof webUi.SidebarNavItem).toBe('function');
+        expect(typeof webUi.Table).toBe('function');
+    });
+});

tests/mocks/mdxeditor.tsx

@@ -0,0 +1,74 @@
+import { forwardRef, useImperativeHandle, type ReactNode } from 'react';
+
+export type MDXEditorMethods = {
+    setMarkdown: (value: string) => void;
+};
+
+export type MDXEditorProps = {
+    markdown: string;
+    onChange?: (value: string) => void;
+    readOnly?: boolean;
+    className?: string;
+    contentEditableClassName?: string;
+    plugins?: unknown[];
+};
+
+export const MDXEditor = forwardRef<MDXEditorMethods, MDXEditorProps>(function MDXEditor(
+    { markdown, onChange, readOnly, className },
+    ref,
+) {
+    useImperativeHandle(
+        ref,
+        () => ({
+            setMarkdown: () => undefined,
+        }),
+        [],
+    );
+
+    if (readOnly) {
+        return (
+            <div data-testid="md-preview" data-class-name={className}>
+                {markdown}
+            </div>
+        );
+    }
+
+    return (
+        <textarea
+            aria-label="Markdown Editor"
+            value={markdown}
+            data-class-name={className}
+            onChange={(event) => onChange?.(event.target.value)}
+        />
+    );
+});
+
+function Control(): ReactNode {
+    return <span />;
+}
+
+function plugin(): Record<string, never> {
+    return {};
+}
+
+export const BlockTypeSelect = Control;
+export const BoldItalicUnderlineToggles = Control;
+export const CodeToggle = Control;
+export const CreateLink = Control;
+export const InsertCodeBlock = Control;
+export const InsertTable = Control;
+export const ListsToggle = Control;
+export const Separator = Control;
+export const UndoRedo = Control;
+
+export const codeBlockPlugin = plugin;
+export const codeMirrorPlugin = plugin;
+export const headingsPlugin = plugin;
+export const linkDialogPlugin = plugin;
+export const linkPlugin = plugin;
+export const listsPlugin = plugin;
+export const markdownShortcutPlugin = plugin;
+export const quotePlugin = plugin;
+export const tablePlugin = plugin;
+export const thematicBreakPlugin = plugin;
+export const toolbarPlugin = plugin;

tests/setup.ts

@@ -0,0 +1,15 @@
+// Required by React to silence act(...) warnings in jsdom tests.
+globalThis.IS_REACT_ACT_ENVIRONMENT = true;
+
+import '@testing-library/jest-dom/vitest';
+import { cleanup } from '@testing-library/react';
+import { afterEach, vi } from 'vitest';
+
+vi.mock('@mdxeditor/editor', () => import('./mocks/mdxeditor'));
+
+afterEach(() => {
+    cleanup();
+    localStorage.clear();
+    vi.restoreAllMocks();
+    vi.useRealTimers();
+});

vite.config.ts

@@ -1,4 +1,4 @@
-import { defineConfig } from 'vite';
+import { defineConfig } from 'vitest/config';
 import react from '@vitejs/plugin-react';
 import { resolve } from 'node:path';
 
@@ -27,4 +27,23 @@ export default defineConfig({
             ],
         },
     },
+    test: {
+        environment: 'jsdom',
+        setupFiles: ['./tests/setup.ts'],
+        coverage: {
+            provider: 'v8',
+            include: ['src/**/*.{ts,tsx}'],
+            exclude: [
+                'src/**/*.stories.{ts,tsx}',
+                'src/styles/**',
+                'src/components/types.ts',
+                'src/types/**',
+            ],
+            thresholds: {
+                lines: 95,
+                functions: 95,
+                branches: 90,
+            },
+        },
+    },
 });