deno-bootstrap/test/interfaces/controllers/controller.class.test.ts

import { assert, assertEquals } from 'test-deps';
import { HTTPStatus } from 'deps';

import Controller, {
  ControllerHandler,
} from 'if/controllers/controller.class.ts';
import { Logger } from 'infra/logger.ts';

Deno.test('Controller class', async () => {
  const mockHandler = (req: Request) => new Response('Hello, world!');
  const controller = new Controller({
    '/_GET': mockHandler,
  });

  // Test that the handler was stored correctly
  assert(controller.hasHandler('/', 'GET'));

  // Test the response method
  const req = new Request('http://localhost/');
  const res = controller.response(req, 'Hello, world!');
  assertEquals(res.status, 200);
  assertEquals(
    new TextDecoder().decode(new Uint8Array(await res.arrayBuffer())),
    'Hello, world!',
  );

  // Test the responseJSON method
  const jsonRes = controller.responseJSON(req, { message: 'Hello, world!' });
  assertEquals(jsonRes.status, 200);
  assertEquals(await jsonRes.json(), { message: 'Hello, world!' });
});

Deno.test('Controller class error handling', async () => {
  const error = new Error('Test error');
  const errorHandler = (
    req: Request,
    error?: string,
    headers?: Record<string, string>,
  ): Response => {
    return controller.response(req, error ?? 'Unknown error', {
      status: HTTPStatus.InternalServerError,
    });
  };

  const controller = new Controller({
    '/_GET': errorHandler,
  });

  // Test that the handler was stored correctly
  assert(controller.hasHandler('/', 'GET'));

  // Test the error response method
  const req = new Request('http://localhost/');
  const handler = controller.getHandler('/', 'GET');
  if (handler) {
    const res = await handler(req, error.message);
    assertEquals(res.status, HTTPStatus.InternalServerError);
    assertEquals(
      new TextDecoder().decode(new Uint8Array(await res.arrayBuffer())),
      error.message,
    );
  } else {
    assert(false, 'Handler not found');
  }
});

Deno.test({
  name: 'Controller should log debug message for health check user agent',
  fn: async () => {
    let logger = Logger.getInstance('test');

    const userAgent = Deno.env.get('DOCKER_USER_AGENT') ?? '';
    console.log(userAgent);
    const req = new Request('http://localhost', {
      method: 'GET',
      headers: new Headers({
        'User-Agent': userAgent,
      }),
    });
    const handler: ControllerHandler = (req: Request) => {
      return controller.response(req, 'Hello, World!');
    };
    const controller = new Controller({ '/_GET': handler }, logger);
    const response = await controller.getHandler('/', 'GET')(req);

    // Check if the expected debug message was logged
    const debugMessage = logger.getMessages().find((message) =>
      message.startsWith('[DEBUG] ') && message.endsWith(`(${userAgent})`)
    );

    assert(debugMessage !== undefined, 'Expected debug message was not logged');

    assertEquals(response.status, 200);
  },
});