Add e2e testing using cypress

Author: gmazzamuto

angular.json

@@ -98,6 +98,37 @@
             ],
             "scripts": []
           }
+        },
+        "cypress-run": {
+          "builder": "@cypress/schematic:cypress",
+          "options": {
+            "devServerTarget": "demo:serve"
+          },
+          "configurations": {
+            "production": {
+              "devServerTarget": "demo:serve:production"
+            }
+          }
+        },
+        "cypress-open": {
+          "builder": "@cypress/schematic:cypress",
+          "options": {
+            "watch": true,
+            "headless": false
+          }
+        },
+        "e2e": {
+          "builder": "@cypress/schematic:cypress",
+          "options": {
+            "devServerTarget": "demo:serve",
+            "watch": true,
+            "headless": false
+          },
+          "configurations": {
+            "production": {
+              "devServerTarget": "demo:serve:production"
+            }
+          }
         }
       }
     },
@@ -129,9 +160,42 @@
             "tsConfig": "projects/ng2-google-charts/tsconfig.spec.json",
             "karmaConfig": "projects/ng2-google-charts/karma.conf.js"
           }
+        },
+        "cypress-run": {
+          "builder": "@cypress/schematic:cypress",
+          "options": {
+            "devServerTarget": "ng2-google-charts:serve",
+            "configFile": "projects/ng2-google-charts/cypress.json"
+          },
+          "configurations": {
+            "production": {
+              "devServerTarget": "ng2-google-charts:serve:production"
+            }
+          }
+        },
+        "cypress-open": {
+          "builder": "@cypress/schematic:cypress",
+          "options": {
+            "watch": true,
+            "headless": false,
+            "configFile": "projects/ng2-google-charts/cypress.json"
+          }
+        },
+        "e2e": {
+          "builder": "@cypress/schematic:cypress",
+          "options": {
+            "devServerTarget": "ng2-google-charts:serve",
+            "watch": true,
+            "headless": false
+          },
+          "configurations": {
+            "production": {
+              "devServerTarget": "ng2-google-charts:serve:production"
+            }
+          }
         }
       }
     }
   },
   "defaultProject": "ng2-google-charts"
-}
+}

cypress.json

@@ -0,0 +1,9 @@
+{
+  "integrationFolder": "cypress/integration",
+  "supportFile": "cypress/support/index.ts",
+  "videosFolder": "cypress/videos",
+  "screenshotsFolder": "cypress/screenshots",
+  "pluginsFile": "cypress/plugins/index.ts",
+  "fixturesFolder": "cypress/fixtures",
+  "baseUrl": "http://localhost:4200"
+}

cypress/fixtures/example.json

@@ -0,0 +1,5 @@
+{
+  "name": "Using fixtures to represent data",
+  "email": "hello@cypress.io",
+  "body": "Fixtures are a great way to mock data for responses to routes"
+}

cypress/integration/spec.ts

@@ -0,0 +1,23 @@
+describe('demo App', () => {
+
+  it('should render Column chart', () => {
+    cy.visit('/', {
+      onBeforeLoad(win) {
+        cy.spy(win.console, 'error').as('spyWinConsoleError');
+      },
+    });
+
+    const expected = ['Countries', 'Germany', 'USA', 'Brazil', 'Canada', 'France', 'RU'];
+
+    const getText = (el:HTMLElement) => el.textContent?.trim();
+    const text = cy.get('#columnChart').find('text').then(els => {
+      const texts = [...els].map(getText).slice(0, expected.length);
+      expect(texts).to.deep.eq(expected);
+    })
+  });
+
+  afterEach(() => {
+    cy.get('@spyWinConsoleError').should('not.have.been.called');
+  });
+
+})

cypress/plugins/index.ts

@@ -0,0 +1,3 @@
+// Plugins enable you to tap into, modify, or extend the internal behavior of Cypress
+// For more info, visit https://on.cypress.io/plugins-api
+module.exports = (on, config) => {}

cypress/support/commands.ts

@@ -0,0 +1,43 @@
+// ***********************************************
+// This example namespace declaration will help
+// with Intellisense and code completion in your
+// IDE or Text Editor.
+// ***********************************************
+// declare namespace Cypress {
+//   interface Chainable<Subject = any> {
+//     customCommand(param: any): typeof customCommand;
+//   }
+// }
+//
+// function customCommand(param: any): void {
+//   console.warn(param);
+// }
+//
+// NOTE: You can use it like so:
+// Cypress.Commands.add('customCommand', customCommand);
+//
+// ***********************************************
+// 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) => { ... })

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
+// ***********************************************************
+
+// When a command from ./commands is ready to use, import with `import './commands'` syntax
+// import './commands';

cypress/tsconfig.json

@@ -0,0 +1,8 @@
+{
+  "extends": "../tsconfig.json",
+  "include": ["**/*.ts"],
+  "compilerOptions": {
+    "sourceMap": false,
+    "types": ["cypress"]
+  }
+}