als-send-file/tests/cache-control.test.js

file serving with advanced options for caching, headers, and error handling, compatible with Express middleware.

const http = require('http');
const { describe, it, beforeEach } = require('node:test');
const assert = require('node:assert');
const cacheControl = require('../lib/cache-control');

describe('Cache-Control Tests', () => {
   let response;

   beforeEach(() => {
      response = new http.ServerResponse({});
      response.setHeader = function (key, value) {
         this.headers = this.headers || {};
         this.headers[key] = value;
      };
   });

   it('should set the correct Cache-Control header for maxAge', () => {
      cacheControl(response, { maxAge: 3600 });
      assert.strictEqual(response.headers['Cache-Control'], 'max-age=3600');
   });

   it('should set multiple directives correctly', () => {
      cacheControl(response, { maxAge: 3600, noCache: true, public: 'public' });
      assert.strictEqual(response.headers['Cache-Control'], 'public, max-age=3600, no-cache');
   });

   it('should handle no directives set', () => {
      cacheControl(response, {});
      assert.strictEqual(response.headers, undefined);
   });

   it('should set the correct Cache-Control header for no-store', () => {
      cacheControl(response, { noStore: true });
      assert.strictEqual(response.headers['Cache-Control'], 'no-store');
   });

   it('should set the correct Cache-Control header for private', () => {
      cacheControl(response, { public: 'private' });
      assert.strictEqual(response.headers['Cache-Control'], 'private');
   });

   it('should ignore invalid maxAge', () => {
      cacheControl(response, { maxAge: 'invalid' });
      assert.strictEqual(response.headers, undefined);
   });

   it('should set all directives correctly', () => {
      cacheControl(response, { maxAge: 3600, noCache: true, noStore: true, public: 'private' });
      assert.strictEqual(response.headers['Cache-Control'], 'private, max-age=3600, no-cache, no-store');
   });
});