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Communication System - Testing Strategy & Examples

Document Version: 1.0
Last Updated: October 26, 2025
Status: Testing Guide & Examples
Modules Covered: Communications, Templates, Preferences, Queue, Recipient Targeting

📋 Table of Contents​

  1. Testing Philosophy
  2. Testing Levels
  3. Component Test Examples
  4. Hook Test Examples
  5. Service Test Examples
  6. Integration Test Examples
  7. E2E Test Examples
  8. Testing Checklist

🎯 Testing Philosophy​

Goals​

  • Confidence: Ship with confidence
  • Regression Prevention: Catch bugs before production
  • Documentation: Tests serve as usage examples
  • Maintainability: Easy to update tests

Priorities​

  1. Critical Paths - User workflows that must work
  2. Edge Cases - Error handling, null states
  3. Integration Points - API calls, data flow
  4. User Experience - Loading, errors, success states

📊 Testing Levels​

1. Unit Tests (60% of test time)​

Focus: Individual functions, components, hooks
Tools: Vitest, React Testing Library
Coverage Goal: 80%+

2. Integration Tests (30% of test time)​

Focus: Module interactions, API integration
Tools: Vitest, MSW (Mock Service Worker)
Coverage Goal: Critical paths

3. E2E Tests (10% of test time)​

Focus: Complete user workflows
Tools: Playwright or Cypress
Coverage Goal: Happy paths + critical errors

🧪 Component Test Examples​

Example 1: CommunicationCard Component​

File: apps/frontend-pwa/src/components/forms/communications/__tests__/CommunicationCard.test.tsx

import { render, screen, fireEvent } from '@testing-library/react';
import { vi } from 'vitest';
import { CommunicationCard } from '../CommunicationCard';
import type { Communication } from '@/types/communications';

const mockCommunication: Communication = {
  id: '123',
  channel: 'email',
  type: 'invoice',
  status: 'delivered',
  recipientContact: 'test@example.com',
  content: 'Test invoice email',
  createdAt: '2025-10-26T10:00:00Z',
  // ... other fields
};

describe('CommunicationCard', () => {
  it('renders communication details correctly', () => {
    const onView = vi.fn();
    const onResend = vi.fn();
    const onDelete = vi.fn();

    render(
      <CommunicationCard
        communication={mockCommunication}
        onView={onView}
        onResend={onResend}
        onDelete={onDelete}
      />
    );

    expect(screen.getByText('test@example.com')).toBeInTheDocument();
    expect(screen.getByText('Test invoice email')).toBeInTheDocument();
  });

  it('calls onView when view button clicked', () => {
    const onView = vi.fn();
    
    render(
      <CommunicationCard
        communication={mockCommunication}
        onView={onView}
        onResend={vi.fn()}
        onDelete={vi.fn()}
      />
    );

    const viewButton = screen.getByRole('button', { name: /view/i });
    fireEvent.click(viewButton);

    expect(onView).toHaveBeenCalledWith(mockCommunication);
  });

  it('shows correct status badge color', () => {
    const { container } = render(
      <CommunicationCard
        communication={{ ...mockCommunication, status: 'failed' }}
        onView={vi.fn()}
        onResend={vi.fn()}
        onDelete={vi.fn()}
      />
    );

    const badge = container.querySelector('.bg-red-100');
    expect(badge).toBeInTheDocument();
  });

  it('disables resend button for successful communications', () => {
    render(
      <CommunicationCard
        communication={{ ...mockCommunication, status: 'delivered' }}
        onView={vi.fn()}
        onResend={vi.fn()}
        onDelete={vi.fn()}
      />
    );

    const resendButton = screen.queryByRole('button', { name: /resend/i });
    expect(resendButton).not.toBeInTheDocument();
  });
});

Time to Write: ~30 minutes
Coverage: Props, events, conditional rendering

Example 2: TemplateCard Component​

File: apps/frontend-pwa/src/components/forms/communication-templates/__tests__/TemplateCard.test.tsx

import { render, screen, fireEvent } from '@testing-library/react';
import { vi } from 'vitest';
import { TemplateCard } from '../TemplateCard';
import type { CommunicationTemplate } from '@/types/communicationTemplates';

const mockTemplate: CommunicationTemplate = {
  id: '456',
  name: 'Invoice Email Template',
  code: 'invoice_email',
  channel: 'email',
  type: 'invoice',
  subject: 'Your Invoice',
  body: 'Hello {{name}}, your invoice is {{amount}}',
  isActive: true,
  providerTemplateId: null,
  createdAt: '2025-10-26T10:00:00Z',
  // ... other fields
};

describe('TemplateCard', () => {
  it('renders template information', () => {
    render(
      <TemplateCard
        template={mockTemplate}
        onView={vi.fn()}
        onEdit={vi.fn()}
        onDuplicate={vi.fn()}
        onDelete={vi.fn()}
      />
    );

    expect(screen.getByText('Invoice Email Template')).toBeInTheDocument();
    expect(screen.getByText('invoice_email')).toBeInTheDocument();
  });

  it('shows active badge for active templates', () => {
    const { container } = render(
      <TemplateCard
        template={mockTemplate}
        onView={vi.fn()}
        onEdit={vi.fn()}
        onDuplicate={vi.fn()}
        onDelete={vi.fn()}
      />
    );

    expect(screen.getByText(/active/i)).toBeInTheDocument();
  });

  it('hides edit buttons when readOnly', () => {
    render(
      <TemplateCard
        template={mockTemplate}
        onView={vi.fn()}
        onEdit={vi.fn()}
        onDuplicate={vi.fn()}
        onDelete={vi.fn()}
        readOnly={true}
      />
    );

    expect(screen.queryByRole('button', { name: /edit/i })).not.toBeInTheDocument();
    expect(screen.queryByRole('button', { name: /delete/i })).not.toBeInTheDocument();
  });

  it('shows WhatsApp provider ID badge when present', () => {
    const whatsappTemplate = {
      ...mockTemplate,
      channel: 'whatsapp' as const,
      providerTemplateId: 'HXe835f49d0aa7f1639f7f8e4b8a1e6c1e',
    };

    render(
      <TemplateCard
        template={whatsappTemplate}
        onView={vi.fn()}
        onEdit={vi.fn()}
        onDuplicate={vi.fn()}
        onDelete={vi.fn()}
      />
    );

    expect(screen.getByText(/WhatsApp Template/i)).toBeInTheDocument();
    expect(screen.getByText('HXe835f49d0aa7f1639f7f8e4b8a1e6c1e')).toBeInTheDocument();
  });
});

Time to Write: ~30 minutes
Coverage: Props, conditional rendering, badges

🔗 Hook Test Examples​

Example 3: useCommunications Hook​

File: apps/frontend-pwa/src/hooks/__tests__/useCommunications.test.ts

import { renderHook, waitFor } from '@testing-library/react';
import { vi } from 'vitest';
import { useCommunications } from '../useCommunications';
import * as communicationsService from '@/services/communicationsService';

vi.mock('@/services/communicationsService');
vi.mock('@/contexts/AuthContext', () => ({
  useAuth: () => ({ token: 'mock-token' }),
}));
vi.mock('@/contexts/useCurrentBusiness', () => ({
  useCurrentBusiness: () => ({ currentBusiness: { id: 'business-123' } }),
}));

describe('useCommunications', () => {
  it('fetches communications on mount', async () => {
    const mockCommunications = {
      data: [
        { id: '1', channel: 'email', status: 'sent' },
        { id: '2', channel: 'sms', status: 'delivered' },
      ],
      total: 2,
      totalPages: 1,
    };

    vi.spyOn(communicationsService, 'getCommunications').mockResolvedValue(
      mockCommunications
    );

    const { result } = renderHook(() => useCommunications());

    await waitFor(() => {
      expect(result.current.isLoading).toBe(false);
    });

    expect(result.current.communications).toHaveLength(2);
    expect(result.current.total).toBe(2);
  });

  it('handles API errors gracefully', async () => {
    vi.spyOn(communicationsService, 'getCommunications').mockRejectedValue(
      new Error('Network error')
    );

    const { result } = renderHook(() => useCommunications());

    await waitFor(() => {
      expect(result.current.error).toBeTruthy();
    });

    expect(result.current.error?.message).toBe('Network error');
    expect(result.current.communications).toHaveLength(0);
  });

  it('refetches when filters change', async () => {
    const spy = vi.spyOn(communicationsService, 'getCommunications');

    const { result, rerender } = renderHook(
      ({ filters }) => useCommunications(filters),
      { initialProps: { filters: { channel: 'email' } } }
    );

    await waitFor(() => expect(result.current.isLoading).toBe(false));

    // Change filters
    rerender({ filters: { channel: 'sms' } });

    await waitFor(() => {
      expect(spy).toHaveBeenCalledTimes(2);
    });
  });
});

Time to Write: ~45 minutes
Coverage: Data fetching, error handling, re-fetching

Example 4: useUpdatePreferences Hook​

File: apps/frontend-pwa/src/hooks/__tests__/usePreferences.test.ts

import { renderHook, act, waitFor } from '@testing-library/react';
import { vi } from 'vitest';
import { useUpdatePreferences } from '../usePreferences';
import * as preferencesService from '@/services/communicationPreferencesService';

describe('useUpdatePreferences', () => {
  it('updates preferences successfully', async () => {
    const mockUpdated = {
      id: '123',
      emailEnabled: false,
      smsEnabled: true,
      // ... other fields
    };

    vi.spyOn(preferencesService, 'updatePreferences').mockResolvedValue(
      mockUpdated
    );

    const { result } = renderHook(() => useUpdatePreferences());

    await act(async () => {
      await result.current.update('customer', 'cust-123', {
        emailEnabled: false,
      });
    });

    expect(result.current.error).toBeNull();
  });

  it('handles update errors', async () => {
    vi.spyOn(preferencesService, 'updatePreferences').mockRejectedValue(
      new Error('Update failed')
    );

    const { result } = renderHook(() => useUpdatePreferences());

    await expect(
      result.current.update('customer', 'cust-123', { emailEnabled: false })
    ).rejects.toThrow('Update failed');

    expect(result.current.error).toBeTruthy();
  });
});

Time to Write: ~30 minutes
Coverage: Mutations, error states

🌐 Service Test Examples​

Example 5: communicationsService​

File: apps/frontend-pwa/src/services/__tests__/communicationsService.test.ts

import { describe, it, expect, vi, beforeEach } from 'vitest';
import { getCommunications, sendCommunication } from '../communicationsService';
import * as apiModule from '@/lib/api';

vi.mock('@/lib/api');

describe('communicationsService', () => {
  beforeEach(() => {
    vi.clearAllMocks();
  });

  describe('getCommunications', () => {
    it('builds correct API URL with filters', async () => {
      const mockResponse = {
        results: [],
        count: 0,
        page: 1,
        size: 20,
      };

      vi.spyOn(apiModule, 'api').mockResolvedValue(mockResponse);

      await getCommunications(
        'token',
        { channel: 'email', status: 'delivered' },
        1,
        20
      );

      expect(apiModule.api).toHaveBeenCalledWith(
        expect.stringContaining('channel=email'),
        'token'
      );
      expect(apiModule.api).toHaveBeenCalledWith(
        expect.stringContaining('status=delivered'),
        'token'
      );
    });

    it('handles pagination correctly', async () => {
      await getCommunications('token', {}, 2, 50);

      expect(apiModule.api).toHaveBeenCalledWith(
        expect.stringContaining('page=2'),
        'token'
      );
      expect(apiModule.api).toHaveBeenCalledWith(
        expect.stringContaining('size=50'),
        'token'
      );
    });
  });

  describe('sendCommunication', () => {
    it('sends POST request with correct data', async () => {
      const mockData = {
        channel: 'sms',
        type: 'invoice_reminder',
        recipientContact: '+1234567890',
        content: 'Test message',
      };

      await sendCommunication('token', mockData);

      expect(apiModule.api).toHaveBeenCalledWith(
        '/communications/send',
        'token',
        expect.objectContaining({
          method: 'POST',
          body: JSON.stringify(mockData),
        })
      );
    });
  });
});

Time to Write: ~45 minutes
Coverage: API calls, URL building, data transformation

🔄 Integration Test Examples​

Example 6: Communications Flow​

File: apps/frontend-pwa/src/__tests__/integration/communications-flow.test.tsx

import { render, screen, fireEvent, waitFor } from '@testing-library/react';
import { vi } from 'vitest';
import { setupServer } from 'msw/node';
import { http, HttpResponse } from 'msw';
import CommunicationsHistoryPage from '@/components/forms/communications/CommunicationsHistoryPage';

const server = setupServer(
  http.get('/communications', () => {
    return HttpResponse.json({
      results: [
        {
          id: '1',
          channel: 'email',
          status: 'delivered',
          recipientContact: 'test@example.com',
          content: 'Test email',
          createdAt: '2025-10-26T10:00:00Z',
        },
      ],
      count: 1,
      page: 1,
      size: 20,
    });
  })
);

beforeAll(() => server.listen());
afterEach(() => server.resetHandlers());
afterAll(() => server.close());

describe('Communications Flow', () => {
  it('loads and displays communications', async () => {
    render(<CommunicationsHistoryPage />);

    await waitFor(() => {
      expect(screen.getByText('test@example.com')).toBeInTheDocument();
    });
  });

  it('filters communications by channel', async () => {
    render(<CommunicationsHistoryPage />);

    const filterButton = screen.getByRole('button', { name: /filters/i });
    fireEvent.click(filterButton);

    const emailFilter = screen.getByRole('combobox', { name: /channel/i });
    fireEvent.change(emailFilter, { target: { value: 'email' } });

    await waitFor(() => {
      expect(screen.getByText('test@example.com')).toBeInTheDocument();
    });
  });

  it('handles resend action', async () => {
    server.use(
      http.post('/communications/:id/resend', () => {
        return HttpResponse.json({ success: true });
      })
    );

    render(<CommunicationsHistoryPage />);

    await waitFor(() => {
      expect(screen.getByText('test@example.com')).toBeInTheDocument();
    });

    const resendButton = screen.getByRole('button', { name: /resend/i });
    fireEvent.click(resendButton);

    await waitFor(() => {
      expect(screen.getByText(/resent/i)).toBeInTheDocument();
    });
  });
});

Time to Write: ~1 hour
Coverage: User workflows, API integration, state updates

🚀 E2E Test Examples​

Example 7: Complete Template Creation Flow​

File: apps/frontend-pwa/e2e/template-creation.spec.ts

import { test, expect } from '@playwright/test';

test.describe('Template Creation Flow', () => {
  test('user can create and use a new template', async ({ page }) => {
    // Login
    await page.goto('/login');
    await page.fill('[name="email"]', 'test@example.com');
    await page.fill('[name="password"]', 'password123');
    await page.click('button[type="submit"]');

    // Navigate to Templates
    await page.goto('/main?form=/forms/TemplatesManagementPage');
    await page.waitForSelector('h1:has-text("Communication Templates")');

    // Click Create Template
    await page.click('button:has-text("Create Template")');
    await page.waitForURL(/TemplateEditorPage/);

    // Fill form
    await page.fill('[name="name"]', 'Test Invoice Email');
    await page.fill('[name="code"]', 'test_invoice_email');
    await page.selectOption('[name="channel"]', 'email');
    await page.selectOption('[name="type"]', 'invoice');
    await page.fill('[name="subject"]', 'Invoice {{invoiceNumber}}');
    await page.fill('[name="body"]', 'Dear {{customerName}}, your invoice is {{amount}}');

    // Click variable to insert
    await page.click('button:has-text("invoiceNumber")');
    
    // Save
    await page.click('button:has-text("Save Template")');

    // Verify success
    await expect(page.locator('text=Template Created')).toBeVisible();
    
    // Verify back on management page
    await page.waitForURL(/TemplatesManagementPage/);
    await expect(page.locator('text=Test Invoice Email')).toBeVisible();
  });

  test('user can preview template with variables', async ({ page }) => {
    await page.goto('/main?form=/forms/TemplatesManagementPage');
    
    // Click view on first template
    await page.click('[aria-label="View"] >> nth=0');

    // Add test variable
    await page.click('button:has-text("Add Variable")');
    await page.fill('input[placeholder*="Variable Name"]', 'invoiceNumber');
    await page.fill('input[placeholder*="Variable Value"]', 'INV-001');

    // Generate preview
    await page.click('button:has-text("Render Preview")');

    // Verify rendered output
    await expect(page.locator('text=INV-001')).toBeVisible();
  });
});

Time to Write: ~1 hour
Coverage: Complete user journeys

📊 Testing Checklist​

Communications Module​

Components​

  • CommunicationCard
    • Renders all fields
    • Status badges correct
    • Action buttons work
    • Read-only mode
  • CommunicationsList
    • Pagination works
    • Filters work
    • Search works
    • Empty state
  • CommunicationDetailsModal
    • Shows all details
    • Actions work
    • Closes correctly
  • CommunicationStatsCards
    • Displays stats
    • Handles loading
    • Breakdowns correct

Hooks​

  • useCommunications
    • Fetches data
    • Handles errors
    • Refetches on filter change
    • Auto-refresh works
  • useSendCommunication
    • Sends successfully
    • Validates input
    • Shows toast
  • useResendCommunication
    • Resends successfully
    • Confirms before resend

Services​

  • getCommunications
    • Builds URL correctly
    • Handles pagination
    • Applies filters
  • sendCommunication
    • POST request correct
    • Returns response
  • getCommunicationStats
    • Aggregates correctly
    • Date range works

Integration​

  • Full send flow (create → queue → send → track)
  • Filter and search flow
  • Resend failed communication
  • View stats and drill down

Templates Module​

Components​

  • TemplateCard
    • Renders template info
    • Shows active badge
    • WhatsApp template ID shown
    • Actions work
  • TemplatesList
    • Filters work
    • Search works
    • Empty state
  • TemplateEditor
    • Form validation
    • Variable insertion
    • Channel-specific fields
    • Saves correctly
  • TemplatePreviewModal
    • Renders template
    • Variables replaced
    • Add/remove variables

Hooks​

  • useTemplates
    • Fetches list
    • Filters work
    • Pagination works
  • useCreateTemplate
    • Creates successfully
    • Validates data
    • Shows success toast
  • usePreviewTemplate
    • Generates preview
    • Handles variables

Integration​

  • Create template → Use in communication
  • Edit template → Verify changes
  • Duplicate template → Verify copy
  • Preview → Send test

Preferences Module​

Components​

  • CustomerPreferencesPage
    • Loads preferences
    • Toggles channels
    • Opt-out works
    • Restore works
  • GlobalPreferencesManagementPage
    • Lists all preferences
    • Pagination works
    • Navigation works

Hooks​

  • usePreferences
    • Fetches for entity
    • Returns defaults if none
  • useOptOut
    • Opts out with reason
    • Shows confirmation
    • Updates UI
  • useRestorePreferences
    • Restores successfully
    • Clears opt-out date

Integration​

  • Set preferences → Send communication → Check respected
  • Opt out → Try send → Verify blocked
  • Restore → Send → Verify allowed

Queue Module​

Components​

  • QueueStatsCards
    • Shows all stats
    • Alerts on high values
    • Loading state
  • QueueJobsList
    • Displays jobs
    • Filters work
    • Bulk selection works
    • Bulk actions work
  • QueueJobDetailsModal
    • Shows job details
    • Retry button works
    • Cancel button works

Hooks​

  • useQueueJobs
    • Fetches jobs
    • Filters work
    • Auto-refresh works
  • useQueueStats
    • Fetches stats
    • Auto-refresh works

Integration​

  • Create communication → Check queued
  • Process queue → Check completed
  • Failed job → Retry → Check re-queued
  • Bulk select → Bulk retry → Check all retried

🎯 Testing Strategy​

Priority 1: Critical Paths (4 hours)​

Must Test:

  1. Send communication flow (end-to-end)
  2. Create and use template
  3. Opt-out blocks communications
  4. Queue processing works
  5. Bulk operations work

Approach:

  • E2E tests for complete flows
  • Integration tests for module interactions
  • Unit tests for critical functions

Priority 2: Component Coverage (2 hours)​

Must Test:

  1. All main page components
  2. All form components
  3. All modal components

Approach:

  • Render tests (does it render without error?)
  • Props tests (do props work?)
  • Event tests (do callbacks fire?)

Priority 3: Error Handling (1 hour)​

Must Test:

  1. API errors show toast
  2. Validation errors show message
  3. Network errors handled gracefully
  4. Loading states work

Approach:

  • Mock API failures
  • Test error boundaries
  • Verify user feedback

Priority 4: Edge Cases (1 hour)​

Must Test:

  1. Empty states
  2. Null values
  3. Very long text
  4. Special characters
  5. Opted-out users

Approach:

  • Boundary value testing
  • Null/undefined handling
  • Overflow scenarios

🛠️ Test Setup Template​

Vitest Configuration​

File: apps/frontend-pwa/vitest.config.ts

import { defineConfig } from 'vitest/config';
import react from '@vitejs/plugin-react';
import path from 'path';

export default defineConfig({
  plugins: [react()],
  test: {
    globals: true,
    environment: 'jsdom',
    setupFiles: './src/test/setup.ts',
    coverage: {
      provider: 'v8',
      reporter: ['text', 'json', 'html'],
      exclude: [
        'node_modules/',
        'src/test/',
        '**/*.d.ts',
        '**/*.config.*',
        '**/mockData.ts',
      ],
    },
  },
  resolve: {
    alias: {
      '@': path.resolve(__dirname, './src'),
    },
  },
});

Test Setup File​

File: apps/frontend-pwa/src/test/setup.ts

import '@testing-library/jest-dom';
import { cleanup } from '@testing-library/react';
import { afterEach, vi } from 'vitest';

// Cleanup after each test
afterEach(() => {
  cleanup();
});

// Mock window.matchMedia
Object.defineProperty(window, 'matchMedia', {
  writable: true,
  value: vi.fn().mockImplementation((query) => ({
    matches: false,
    media: query,
    onchange: null,
    addListener: vi.fn(),
    removeListener: vi.fn(),
    addEventListener: vi.fn(),
    removeEventListener: vi.fn(),
    dispatchEvent: vi.fn(),
  })),
});

// Mock IntersectionObserver
global.IntersectionObserver = class IntersectionObserver {
  constructor() {}
  disconnect() {}
  observe() {}
  takeRecords() {
    return [];
  }
  unobserve() {}
} as any;

Test Utilities​

File: apps/frontend-pwa/src/test/test-utils.tsx

import { ReactElement } from 'react';
import { render, RenderOptions } from '@testing-library/react';
import { BrowserRouter } from 'react-router-dom';
import { AuthProvider } from '@/contexts/AuthContext';
import { I18nextProvider } from 'react-i18next';
import i18n from '@/i18n';

interface AllTheProvidersProps {
  children: React.ReactNode;
}

function AllTheProviders({ children }: AllTheProvidersProps) {
  return (
    <BrowserRouter>
      <I18nextProvider i18n={i18n}>
        <AuthProvider>
          {children}
        </AuthProvider>
      </I18nextProvider>
    </BrowserRouter>
  );
}

const customRender = (
  ui: ReactElement,
  options?: Omit<RenderOptions, 'wrapper'>
) => render(ui, { wrapper: AllTheProviders, ...options });

export * from '@testing-library/react';
export { customRender as render };

📝 Quick Start Guide​

1. Install Testing Dependencies​

cd apps/frontend-pwa
pnpm add -D vitest @vitest/ui @testing-library/react @testing-library/jest-dom @testing-library/user-event msw

2. Create Test Files​

# Component tests
mkdir -p src/components/forms/communications/__tests__
mkdir -p src/components/forms/communication-templates/__tests__
mkdir -p src/components/forms/communication-preferences/__tests__

# Hook tests
mkdir -p src/hooks/__tests__

# Service tests
mkdir -p src/services/__tests__

# Integration tests
mkdir -p src/__tests__/integration

3. Run Tests​

# Run all tests
pnpm test

# Run with UI
pnpm test:ui

# Run with coverage
pnpm test:coverage

# Watch mode
pnpm test:watch

🎯 Test Coverage Goals​

ModuleUnitIntegrationE2ETotal
Communications80%60%2 flows70%+
Templates80%60%2 flows70%+
Preferences80%40%1 flow65%+
Queue80%40%1 flow65%+
Recipient Targeting70%40%1 flow60%+
Overall80%50%7 flows70%

📊 Estimated Testing Time​

By Test Type​

Test TypeHoursDescription
Component Tests6hAll cards, lists, forms, modals
Hook Tests4hAll custom hooks
Service Tests3hAll API services
Integration Tests5hModule interactions
E2E Tests2hCritical user flows
Total20hFull test suite

By Module​

ModuleHoursPriority
Communications6h🔴 HIGH
Templates5h🔴 HIGH
Preferences3h🟡 MEDIUM
Queue3h🟡 MEDIUM
Recipient Targeting3h🟡 MEDIUM
Total20h—

✅ Success Criteria​

Definition of Done for Testing​

A module is "fully tested" when:

✅ Unit Tests

  • All components have tests
  • All hooks have tests
  • All services have tests
  • Coverage ≥ 80%

✅ Integration Tests

  • Critical paths tested
  • API mocking complete
  • State management verified

✅ E2E Tests

  • Happy path works
  • Error paths work
  • User can complete task

✅ Quality

  • No flaky tests
  • Fast execution (< 30s)
  • Clear error messages
  • Easy to maintain

🚀 Next Steps​

Immediate Actions​

  1. Set up testing infrastructure (30 min)

    • Install dependencies
    • Configure Vitest
    • Create test utilities

  2. Write first tests (2h)

    • CommunicationCard test
    • TemplateCard test
    • useCommunications test
    • Basic integration test

  3. Expand coverage (6h)

    • All component tests
    • All hook tests
    • All service tests

  4. E2E tests (2h)

    • Template creation flow
    • Communication send flow
    • Preferences update flow

📚 Resources​

Documentation​

Examples​

  • See test files in this document
  • Copy and adapt for your components
  • Follow consistent patterns

🎯 Testing Best Practices​

DO ✅​

  • Test behavior, not implementation
  • Use descriptive test names
  • Mock external dependencies
  • Test error states
  • Keep tests simple and focused
  • Use test utilities for common setups

DON'T ❌​

  • Test implementation details
  • Write fragile tests (brittle selectors)
  • Skip error cases
  • Duplicate test code
  • Test third-party libraries
  • Over-mock (test integration when possible)

💡 Quick Wins​

Start Here for Maximum Impact​

  1. Test Critical Paths (2h)

    • Send communication E2E
    • Create template E2E
    • These cover 80% of user value

  2. Test Error Handling (1h)

    • API failures
    • Validation errors
    • Network issues

  3. Test Main Components (2h)

    • Communication Card
    • Template Card
    • Preferences Form

Total: 5 hours → Huge confidence boost! 🚀

📊 Recommended Testing Schedule​

Week 1: Foundation (8h)​

  • Day 1: Setup + Component tests (4h)
  • Day 2: Hook tests (4h)

Week 2: Integration (8h)​

  • Day 3: Service tests (3h)
  • Day 4: Integration tests (5h)

Week 3: E2E (4h)​

  • Day 5: E2E tests (2h)
  • Day 6: Polish + Coverage (2h)

Total: 20 hours → Production-ready test suite!

🎊 Summary​

Testing is the final step to production readiness!

With this guide, you have:

  • ✅ Complete testing strategy
  • ✅ Real code examples
  • ✅ Setup instructions
  • ✅ Coverage goals
  • ✅ Priority list
  • ✅ Time estimates

Just follow the examples and adapt to your components!

Status: ✅ TESTING GUIDE COMPLETE
Next: Run the tests and ship to production! 🚀

Last Updated: October 26, 2025
Version: 1.0
Maintainer: Development Team