Configure Playwright for headless CI and add Gitea workflow with container support

backend/tests/server.test.js

@@ -1,42 +1,74 @@
-/**
- * Placeholder test file for Line of Sight Backend
- * 
- * TODO: Add real tests for:
- * - API endpoint validation
- * - Geospatial calculations
- * - Database queries
- * - Error handling
- */
+const request = require('supertest');
+const { app, calculateDestination } = require('../app/server');
+
+// Mock pg Pool
+jest.mock('pg', () => {
+  const mPool = {
+    query: jest.fn(),
+    on: jest.fn(),
+    end: jest.fn(),
+  };
+  return { Pool: jest.fn(() => mPool) };
+});
+
+const { Pool } = require('pg');
+const pool = new Pool();
 
 describe('Line of Sight Backend', () => {
+  beforeEach(() => {
+    jest.clearAllMocks();
+  });
+
+  describe('calculateDestination', () => {
+    test('should calculate correct destination for North (0 degrees)', () => {
+      const start = { lat: 0, lon: 0 };
+      const dest = calculateDestination(start.lat, start.lon, 0, 111.12); // ~1 degree North
+      expect(dest.lat).toBeCloseTo(1, 1);
+      expect(dest.lon).toBeCloseTo(0, 1);
+    });
+
+    test('should calculate correct destination for East (90 degrees)', () => {
+      const start = { lat: 0, lon: 0 };
+      const dest = calculateDestination(start.lat, start.lon, 90, 111.12); // ~1 degree East at equator
+      expect(dest.lat).toBeCloseTo(0, 1);
+      expect(dest.lon).toBeCloseTo(1, 1);
+    });
+  });
+
   describe('GET /api/health', () => {
-    test('should return 200 OK', () => {
-      // TODO: Implement health check test
-      expect(true).toBe(true);
+    test('should return 200 OK', async () => {
+      const response = await request(app).get('/api/health');
+      expect(response.status).toBe(200);
+      expect(response.body.status).toBe('ok');
     });
   });
 
   describe('GET /api/line-of-sight', () => {
-    test('should return valid response structure', () => {
-      // TODO: Implement line of sight API test
-      expect(true).toBe(true);
+    test('should return valid response structure', async () => {
+      // Mock the water checks and the main city query
+      pool.query
+        .mockResolvedValueOnce({ rows: [{ has_land: true }] }) // Simplified for tests, it actually calls many times
+        .mockResolvedValue({ rows: [{ id: 1, name: 'London', population: 9000000, country: 'GB', lat: 51.5, lon: -0.1, distance_off_line_km: 0, distance_from_start_km: 0, pos_on_line: 0 }] });
+
+      const response = await request(app)
+        .get('/api/line-of-sight')
+        .query({ lat: 51.5, lon: -0.1, direction: 45, tolerance: 50 });
+
+      expect(response.status).toBe(200);
+      expect(response.body.success).toBe(true);
+      expect(response.body.data.conurbations).toBeDefined();
+      expect(response.body.data.line_coordinates).toBeDefined();
     });
 
-    test('should handle missing parameters', () => {
-      // TODO: Implement error handling test
-      expect(true).toBe(true);
-    });
-  });
+    test('should handle database errors', async () => {
+      pool.query.mockRejectedValue(new Error('DB Error'));
 
-  describe('Geospatial Calculations', () => {
-    test('should calculate great circle path', () => {
-      // TODO: Implement geospatial calculation tests
-      expect(true).toBe(true);
-    });
+      const response = await request(app)
+        .get('/api/line-of-sight')
+        .query({ lat: 51.5, lon: -0.1, direction: 45, tolerance: 50 });
 
-    test('should filter cities within tolerance', () => {
-      // TODO: Implement tolerance filtering tests
-      expect(true).toBe(true);
+      expect(response.status).toBe(500);
+      expect(response.body.success).toBe(false);
     });
   });
 });