test: use cypress (#25)

.eslintrc.js

@@ -4,6 +4,7 @@ module.exports = {
     project: 'tsconfig.json',
     sourceType: 'module',
   },
+  ignorePatterns: ['test', 'node_modules', 'dist', 'public'],
   plugins: ['@typescript-eslint/eslint-plugin'],
   extends: [
     'plugin:@typescript-eslint/recommended',

public/.eslintrc.js

@@ -1,24 +1,24 @@
 module.exports = {
+  root: true,
   parser: '@typescript-eslint/parser',
   parserOptions: {
     project: 'tsconfig.json',
-    sourceType: 'module',
+    createDefaultProgram: true
   },
+  ignorePatterns: ['cypress', 'node_modules', 'dist', 'public'],
   plugins: ['@typescript-eslint/eslint-plugin'],
   extends: [
     'plugin:@typescript-eslint/recommended',
     'prettier/@typescript-eslint',
-    'plugin:prettier/recommended',
+    'plugin:prettier/recommended'
   ],
-  root: true,
   env: {
-    node: true,
-    jest: true,
+    browser: true
   },
   rules: {
     '@typescript-eslint/interface-name-prefix': 'off',
     '@typescript-eslint/explicit-function-return-type': 'off',
     '@typescript-eslint/explicit-module-boundary-types': 'off',
-    '@typescript-eslint/no-explicit-any': 'off',
-  },
+    '@typescript-eslint/no-explicit-any': 'off'
+  }
 };

public/cypress.json

@@ -0,0 +1,7 @@
+{
+  "baseUrl": "http://localhost:3001",
+  "fixturesFolder": false,
+  "video": false,
+  "pluginsFile": "cypress/plugins/index.ts",
+  "supportFile": "cypress/support/index.ts"
+}

public/cypress/.eslintrc.js

@@ -0,0 +1,13 @@
+module.exports = {
+  ignorePatterns: ['!**/*'],
+  extends: ['../.eslintrc.js'],
+  overrides: [
+    {
+      files: ['*.ts'],
+      parserOptions: {
+        project: ['./tsconfig.json'],
+        tsconfigRootDir: __dirname
+      }
+    }
+  ]
+};

public/cypress/integration/login.spec.ts

@@ -0,0 +1,47 @@
+describe('Log In', () => {
+  beforeEach(() => cy.visit('/login'));
+
+  it('should successfully logs in', () => {
+    // we can submit form using "cy.submit" command
+    // https://on.cypress.io/submit
+    cy.get('input[name=user]').type('admin');
+    cy.get('input[name=password]').type('admin');
+    cy.get('button[type=submit]').click();
+
+    // we should be in
+    cy.url().should('include', '/');
+    cy.get('a.get-started-btn').should('contain', 'Log out admin');
+  });
+
+  it('should displays errors on login', function () {
+    // alias this request so we can wait on it later
+    cy.intercept('POST', '/login').as('postLogin');
+
+    // incorrect username on password
+    cy.get('input[name=user]').type('jane.lae');
+    cy.get('input[name=password]').type('password123{enter}');
+
+    // we should always explicitly check if the status equals 401
+    cy.wait('@postLogin').its('response.statusCode').should('eq', 401);
+
+    // and still be on the same URL
+    cy.url().should('include', '/login');
+  });
+
+  it('can stub the XHR to force it to fail', function () {
+    // alias this request so we can wait on it later
+    cy.intercept('POST', '/login', { statusCode: 503, delay: 5000 }).as(
+      'postLogin'
+    );
+
+    // incorrect username on password
+    cy.get('input[name=user]').type('admin');
+    cy.get('input[name=password]').type('admin{enter}');
+
+    // we should always explicitly check if the status equals 401
+    cy.wait('@postLogin').its('response.statusCode').should('eq', 503);
+
+    // and still be on the same URL
+    cy.url().should('include', '/login');
+  });
+});

public/cypress/plugins/index.ts

@@ -0,0 +1,24 @@
+// cypress/plugins/index.ts
+
+/// <reference types="cypress" />
+// ***********************************************************
+// This example plugins/index.js can be used to load plugins
+//
+// You can change the location of this file or turn off loading
+// the plugins file with the 'pluginsFile' configuration option.
+//
+// You can read more here:
+// https://on.cypress.io/plugins-guide
+// ***********************************************************
+
+// This function is called when a project is opened or re-opened (e.g. due to
+// the project's config changing)
+
+// eslint-disable-next-line @typescript-eslint/no-unused-vars
+export default (
+  _on: Cypress.PluginEvents,
+  _config: Cypress.PluginConfigOptions
+) => {
+  // `on` is used to hook into various events Cypress emits
+  // `config` is the resolved Cypress config
+};

public/cypress/support/commands.ts

@@ -0,0 +1,25 @@
+// ***********************************************
+// This example commands.js shows you how to
+// create various custom commands and overwrite
+// existing commands.
+//
+// For more comprehensive examples of custom
+// commands please read more here:
+// https://on.cypress.io/custom-commands
+// ***********************************************
+//
+//
+// -- This is a parent command --
+// Cypress.Commands.add("login", (email, password) => { ... })
+//
+//
+// -- This is a child command --
+// Cypress.Commands.add("drag", { prevSubject: 'element'}, (subject, options) => { ... })
+//
+//
+// -- This is a dual command --
+// Cypress.Commands.add("dismiss", { prevSubject: 'optional'}, (subject, options) => { ... })
+//
+//
+// -- This will overwrite an existing command --
+// Cypress.Commands.overwrite("visit", (originalFn, url, options) => { ... })

public/cypress/support/index.ts

@@ -0,0 +1,17 @@
+// ***********************************************************
+// This example support/index.js is processed and
+// loaded automatically before your test files.
+//
+// This is a great place to put global configuration and
+// behavior that modifies Cypress.
+//
+// You can change the location of this file or turn off
+// automatically serving support files with the
+// 'supportFile' configuration option.
+//
+// You can read more here:
+// https://on.cypress.io/configuration
+// ***********************************************************
+
+// Import commands.js using ES2015 syntax:
+import './commands';

public/cypress/tsconfig.json

@@ -0,0 +1,10 @@
+{
+  "extends": "../tsconfig.json",
+  "compilerOptions": {
+    "isolatedModules": false,
+    "target": "es5",
+    "lib": ["es5", "dom"],
+    "types": ["cypress"]
+  },
+  "include": ["**/*", "../src/**/*"]
+}