serverless/tests/integration-all/http-api/tests.js

'use strict';

const _ = require('lodash');
const { expect } = require('chai');
const log = require('log').get('serverless:test');
const awsRequest = require('@serverless/test/aws-request');
const fixtures = require('../../fixtures');

const { getTmpDirPath } = require('../../utils/fs');
const {
  createTestService,
  deployService,
  removeService,
  fetch,
} = require('../../utils/integration');

describe('HTTP API Integration Test', function() {
  this.timeout(1000 * 60 * 20); // Involves time-taking deploys
  let serviceName;
  let endpoint;
  let stackName;
  let tmpDirPath;
  const stage = 'dev';

  const resolveEndpoint = async () => {
    const result = await awsRequest('CloudFormation', 'describeStacks', { StackName: stackName });
    const endpointOutput = _.find(result.Stacks[0].Outputs, { OutputKey: 'HttpApiUrl' })
      .OutputValue;
    endpoint = endpointOutput.match(/https:\/\/.+\.execute-api\..+\.amazonaws\.com/)[0];
  };

  describe('Specific endpoints', () => {
    let poolId;
    let clientId;
    const userName = 'test-http-api';
    const userPassword = 'razDwa3!';

    before(async () => {
      tmpDirPath = getTmpDirPath();
      log.debug('temporary path %s', tmpDirPath);
      poolId = (
        await awsRequest('CognitoIdentityServiceProvider', 'createUserPool', {
          PoolName: `test-http-api-${process.hrtime()[1]}`,
        })
      ).UserPool.Id;
      [clientId] = await Promise.all([
        awsRequest('CognitoIdentityServiceProvider', 'createUserPoolClient', {
          ClientName: 'test-http-api',
          UserPoolId: poolId,
          ExplicitAuthFlows: ['ALLOW_USER_PASSWORD_AUTH', 'ALLOW_REFRESH_TOKEN_AUTH'],
          PreventUserExistenceErrors: 'ENABLED',
        }).then(result => result.UserPoolClient.ClientId),
        awsRequest('CognitoIdentityServiceProvider', 'adminCreateUser', {
          UserPoolId: poolId,
          Username: userName,
        }).then(() =>
          awsRequest('CognitoIdentityServiceProvider', 'adminSetUserPassword', {
            UserPoolId: poolId,
            Username: userName,
            Password: userPassword,
            Permanent: true,
          })
        ),
      ]);

      const serverlessConfig = await createTestService(tmpDirPath, {
        templateDir: await fixtures.extend('httpApi', {
          provider: {
            httpApi: {
              cors: { exposedResponseHeaders: 'X-foo' },
              authorizers: {
                someAuthorizer: {
                  identitySource: '$request.header.Authorization',
                  issuerUrl: `https://cognito-idp.us-east-1.amazonaws.com/${poolId}`,
                  audience: clientId,
                },
              },
            },
          },
          functions: {
            foo: {
              events: [
                {
                  httpApi: {
                    authorizer: 'someAuthorizer',
                  },
                },
              ],
            },
          },
        }),
      });
      serviceName = serverlessConfig.service;
      stackName = `${serviceName}-${stage}`;
      log.notice('deploying %s service', serviceName);
      await deployService(tmpDirPath);
      return resolveEndpoint();
    });

    after(async () => {
      await awsRequest('CognitoIdentityServiceProvider', 'deleteUserPool', { UserPoolId: poolId });
      if (!serviceName) return;
      log.notice('Removing service...');
      await removeService(tmpDirPath);
    });

    it('should expose an accessible POST HTTP endpoint', async () => {
      const testEndpoint = `${endpoint}/some-post`;

      const response = await fetch(testEndpoint, { method: 'POST' });
      const json = await response.json();
      expect(json).to.deep.equal({ method: 'POST', path: '/some-post' });
    });

    it('should expose an accessible paramed GET HTTP endpoint', async () => {
      const testEndpoint = `${endpoint}/bar/whatever`;

      const response = await fetch(testEndpoint, { method: 'GET' });
      const json = await response.json();
      expect(json).to.deep.equal({ method: 'GET', path: '/bar/whatever' });
    });

    it('should return 404 on not supported method', async () => {
      const testEndpoint = `${endpoint}/foo`;

      const response = await fetch(testEndpoint, { method: 'POST' });
      expect(response.status).to.equal(404);
    });

    it('should return 404 on not configured path', async () => {
      const testEndpoint = `${endpoint}/not-configured`;

      const response = await fetch(testEndpoint, { method: 'GET' });
      expect(response.status).to.equal(404);
    });

    it('should support CORS when indicated', async () => {
      const testEndpoint = `${endpoint}/bar/whatever`;

      const response = await fetch(testEndpoint, {
        method: 'GET',
        headers: { Origin: 'https://serverless.com' },
      });
      expect(response.headers.get('access-control-allow-origin')).to.equal('*');
      expect(response.headers.get('access-control-expose-headers')).to.equal('x-foo');
    });

    it('should expose a GET HTTP endpoint backed by JWT authorization', async () => {
      const testEndpoint = `${endpoint}/foo`;

      const responseUnauthorized = await fetch(testEndpoint, {
        method: 'GET',
      });
      expect(responseUnauthorized.status).to.equal(401);

      const token = (
        await awsRequest('CognitoIdentityServiceProvider', 'initiateAuth', {
          AuthFlow: 'USER_PASSWORD_AUTH',
          AuthParameters: { USERNAME: userName, PASSWORD: userPassword },
          ClientId: clientId,
        })
      ).AuthenticationResult.IdToken;
      const responseAuthorized = await fetch(testEndpoint, {
        method: 'GET',
        headers: { Authorization: token },
      });
      const json = await responseAuthorized.json();
      expect(json).to.deep.equal({ method: 'GET', path: '/foo' });
    });
  });

  describe('Catch-all endpoints', () => {
    before(async () => {
      tmpDirPath = getTmpDirPath();
      log.debug('temporary path %s', tmpDirPath);
      const serverlessConfig = await createTestService(tmpDirPath, {
        templateDir: fixtures.map.httpApiCatchAll,
      });
      serviceName = serverlessConfig.service;
      stackName = `${serviceName}-${stage}`;
      log.notice('deploying %s service', serviceName);
      await deployService(tmpDirPath);
      return resolveEndpoint();
    });

    after(async () => {
      log.notice('Removing service...');
      await removeService(tmpDirPath);
    });

    it('should catch all root endpoint', async () => {
      const testEndpoint = `${endpoint}`;

      const response = await fetch(testEndpoint, { method: 'GET' });
      const json = await response.json();
      expect(json).to.deep.equal({ method: 'GET', path: '/' });
    });

    it('should catch all whatever endpoint', async () => {
      const testEndpoint = `${endpoint}/whatever`;

      const response = await fetch(testEndpoint, { method: 'PATCH' });
      const json = await response.json();
      expect(json).to.deep.equal({ method: 'PATCH', path: '/whatever' });
    });

    it('should catch all methods on method catch all endpoint', async () => {
      const testEndpoint = `${endpoint}/foo`;

      const response = await fetch(testEndpoint, { method: 'PATCH' });
      const json = await response.json();
      expect(json).to.deep.equal({ method: 'PATCH', path: '/foo' });
    });
  });
});