Refactor nodeserver.js: extract endpoints into modules, add endpoint tests

[Copilot]

The monolithic nodeserver.js (226 lines) mixed routing, business logic, and data definitions. Endpoints lacked HTTP-level test coverage.

Changes

Extracted utility modules:

• validators.js - phone/DNI validation
• colorUtils.js, dateUtils.js, fileUtils.js - domain utilities
• countryData.js - static data

Extracted route handlers:

• routes/getRoute.js, routes/daysRoute.js, routes/fileRoute.js, routes/countryRoute.js, routes/healthRoute.js

Refactored server (66 lines):

const { handleGetRoute } = require('./routes/getRoute');
const { handleDaysRoute } = require('./routes/daysRoute');
// ... other imports

const server = http.createServer((req, res) => {
    const parsedUrl = url.parse(req.url, true);
    const pathname = parsedUrl.pathname;
    const query = parsedUrl.query;

    if (pathname === '/get') {
        handleGetRoute(query, res);
    } else if (pathname === '/DaysBetweenDates') {
        handleDaysRoute(query, res);
    }
    // ... other routes
});

Added HTTP endpoint tests:

• /DaysBetweenDates success and error cases
• /GetLineByLineFromTextFile
• /RandomEuropeanCountry
• 404 handling

Test coverage: 12 → 17 tests, all passing. Behavior unchanged.

Original prompt

Refactor nodeserver.js by extracting endpoints into small modules and add missing tests in test.js. Keep behavior identical. Ensure all tests are passing

The user has attached the following file paths as relevant context:

• exercisefiles/node/nodeserver.js

Created from VS Code.

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