feat: Add Cypress (#16)

Fixes #10 

- Adds Cypress
- Adds Cypress to CircleCI testing
- Tests all examples
	- some changes were made to the themes in order to test those
	- tests ensure that all elements are showing correctly in the examples. the functionality around the theme options isn't tested yet

.circleci/config.yml

@@ -10,11 +10,17 @@ executors:
           TERM: xterm
 
 aliases:
+  e2e-executor: &e2e-executor
+    docker:
+      - image: cypress/browsers:chrome69
+        environment:
+          TERM: xterm
+
   restore_cache: &restore_cache
     restore_cache:
       name: Restore Yarn Package Cache
       keys:
-        - v{{ .Environment.versionCache }}-deps-{{ .Branch }}-{{ checksum "yarn.lock" }}-{{ checksum ".circleci/config.yml" }}
+        - v{{ .Environment.versionCache }}-deps-{{ .Branch }}-{{ checksum "yarn.lock" }}
 
   install_node_modules: &install_node_modules
     run:
@@ -24,7 +30,7 @@ aliases:
   save_cache: &save_cache
     save_cache:
       name: Save Yarn Package Cache
-      key: v{{ .Environment.versionCache }}-deps-{{ .Branch }}-{{ checksum "yarn.lock" }}-{{ checksum ".circleci/config.yml" }}
+      key: v{{ .Environment.versionCache }}-deps-{{ .Branch }}-{{ checksum "yarn.lock" }}
       paths:
         - /home/circleci/.cache
 
@@ -36,6 +42,33 @@ aliases:
     store_artifacts:
       path: results
 
+  e2e-test-workflow: &e2e-test-workflow
+    filters:
+      branches:
+        ignore:
+          - /docs.+/
+          - /www.+/
+
+commands:
+  e2e-test:
+    parameters:
+      example-name:
+        type: string
+    steps:
+      - checkout
+      - <<: *restore_cache
+      - <<: *install_node_modules
+      - <<: *save_cache
+      - run:
+          name: Execute E2E script
+          command: bash ./scripts/e2e-build.sh "<< parameters.example-name >>"
+      - <<: *store_results
+      - <<: *store_results_artifacts
+      - store_artifacts:
+          path: cypress/videos
+      - store_artifacts:
+          path: cypress/screenshots
+
 version: 2.1
 
 jobs:
@@ -52,8 +85,32 @@ jobs:
       - <<: *store_results
       - <<: *store_results_artifacts
 
+  e2e-test-emma:
+    <<: *e2e-executor
+    steps:
+      - e2e-test:
+          example-name: emma
+
+  e2e-test-cara:
+    <<: *e2e-executor
+    steps:
+      - e2e-test:
+          example-name: cara
+
+  e2e-test-status-dashboard:
+    <<: *e2e-executor
+    steps:
+      - e2e-test:
+          example-name: status-dashboard
+
 workflows:
   version: 2
   lint-test:
     jobs:
-      - lint
+      - lint
+      - e2e-test-emma:
+          <<: *e2e-test-workflow
+      - e2e-test-cara:
+          <<: *e2e-test-workflow
+      - e2e-test-status-dashboard:
+          <<: *e2e-test-workflow

.eslintignore

@@ -1,6 +1,7 @@
 typings.d.ts
 index.d.ts
 www/src/webgl/uniforms.js
+cypress/e2e/build
 logs
 *.log
 npm-debug.log*

.eslintrc.js

@@ -13,13 +13,18 @@ module.exports = {
     sourceType: 'module', // Allows for the use of imports
     ecmaFeatures: {
       jsx: true,
-    }
+    },
+    project: './tsconfig.json'
   },
   env: {
     browser: true,
     jest: true,
     node: true,
   },
+  globals: {
+    cy: true,
+    Cypress: true,
+  },
   rules: {
     "@typescript-eslint/no-unused-vars": [
       1,

.gitignore

@@ -64,4 +64,9 @@ public
 
 .idea
 .vscode
-.DS_Store
+.DS_Store
+
+cypress/e2e/build
+results
+cypress/videos
+cypress/screenshots

README.md

@@ -42,7 +42,25 @@ yarn workspace [examples/name] develop
 
 In the case of `examples/emma` this command would be `yarn workspace emma develop`. Now you can make changes to the respective theme and see them via Hot-Reloading.
 
-Commit your changes to a feature branch of your fork and open up a PR against this repository.
+Commit your changes to a feature branch of your fork and open up a PR against this repository. The PR will have checks in place (unit and end-to-end tests) which you can also run on your machine in preparation for the PR.
+
+### Testing
+
+#### Cypress
+
+The Cypress tests are written in TypeScript, too, and hence need to be compiled before usage. Run the following script for development:
+
+```sh
+bash ./scripts/e2e-dev.sh "example-name"
+```
+
+In the case of `examples/emma` the "example-name" would be "emma".
+
+The script starts `tsc` in _watch_ mode (for the files in `cypress/e2e`) and outputs them to `cypress/e2e/build` + starts `start-server-and-test` with Gatsby's development server and Cypress. Once the Cypress GUI opens select the fitting test (the others won't work, only the respective test + `smoke.js`!).
+
+CircleCI will run the `e2e-build.sh` script — you can use it to run the tests headless.
+
+You can skip the e2e tests if you use `docs` or `www` in your branch name, e.g. `docs/improve-readme` or `www/add-new-entry`.
 
 ## 🤩 Newsletter
 

cypress.json

@@ -0,0 +1,6 @@
+{
+  "baseUrl": "http://localhost:8000",
+  "integrationFolder": "cypress/e2e/build",
+  "viewportHeight": 900,
+  "viewportWidth": 1440
+}

cypress/e2e/cara.ts

@@ -0,0 +1,32 @@
+/// <reference types="../support/index" />
+/// <reference types="cypress" />
+/// <reference types="@testing-library/cypress/typings" />
+
+describe(`gatsby-theme-cara`, () => {
+  beforeEach(() => {
+    cy.visit(`/`).waitForRouteChange()
+  })
+  it(`should render hero content`, () => {
+    cy.getByText(/hi, i'm jane doe/i)
+  })
+  it(`should render project content`, () => {
+    cy.getByText(/freiheit/i).getByText(/this project is my entry to adobe's #challengeyourperspective contest./i)
+  })
+  it(`should render project cards with links`, () => {
+    cy.getByText(/freiheit/i)
+      .parent()
+      .should(`have.attr`, `href`, `https://www.behance.net/gallery/58937147/Freiheit`)
+  })
+  it(`should render about content`, () => {
+    cy.getByText(/winky face./i)
+  })
+  it(`should render contact content`, () => {
+    cy.getByText(/Dribbble/i)
+  })
+  it(`should render the light/dark mode toggle`, () => {
+    cy.getByLabelText(/toggle dark mode/i)
+  })
+  it(`should render the footer`, () => {
+    cy.getByText(/theme by lekoarts/i)
+  })
+})

cypress/e2e/emma.ts

@@ -0,0 +1,48 @@
+/// <reference types="../support/index" />
+/// <reference types="cypress" />
+/// <reference types="@testing-library/cypress/typings" />
+
+describe(`gatsby-theme-emma`, () => {
+  beforeEach(() => {
+    cy.visit(`/`).waitForRouteChange()
+  })
+  it(`should render the site title`, () => {
+    cy.getByLabelText(/emma, back to homepage/i)
+  })
+  it(`should render additional page in navigation`, () => {
+    cy.getByText(/about/i)
+  })
+  it(`should render the light/dark mode toggle`, () => {
+    cy.getByLabelText(/toggle dark mode/i)
+  })
+  it(`should render social media icons in header`, () => {
+    cy.getByLabelText(/instagram/i).getByLabelText(/dribbble/i)
+  })
+  it(`should render the footer`, () => {
+    cy.getByText(/theme by lekoarts/i)
+  })
+  it(`should have item with all information`, () => {
+    cy.getByLabelText(/view detail page of hermione granger/i).within(() => {
+      cy.getByText(/hogwarts/i).getByText(/witchcraft/i)
+    })
+  })
+  it(`should link and display the project page`, () => {
+    cy.getByLabelText(/view detail page of hermione granger/i)
+      .click()
+      .waitForRouteChange()
+      .assertRoute(`/hermione-granger`)
+      .get(`h1`)
+      .within(() => {
+        cy.getByText(/hermione granger/i)
+      })
+      .getByText(/hogwarts/i)
+      .getByText(/10.06.2019/i)
+      .getByText(/witchcraft/i)
+  })
+  it(`should link and display the about page`, () => {
+    cy.getByText(/about/i)
+      .click()
+      .waitForRouteChange()
+      .assertRoute(`/about`)
+  })
+})

cypress/e2e/smoke.ts

@@ -0,0 +1,9 @@
+/// <reference types="../support/index" />
+/// <reference types="cypress" />
+/// <reference types="@testing-library/cypress/typings" />
+
+describe(`app`, () => {
+  it(`should work`, () => {
+    cy.visit(`/`).assertRoute(`/`)
+  })
+})

cypress/e2e/status-dashboard.ts

@@ -0,0 +1,38 @@
+/// <reference types="../support/index" />
+/// <reference types="cypress" />
+/// <reference types="@testing-library/cypress/typings" />
+
+describe(`gatsby-theme-status-dashboard`, () => {
+  beforeEach(() => {
+    cy.visit(`/`).waitForRouteChange()
+  })
+  it(`should render the title`, () => {
+    cy.get(`h1`).within(() => {
+      cy.getByText(/status dashboard - lekoarts/i)
+    })
+  })
+  it(`should render the description`, () => {
+    cy.getByText(/showing the statuses of my netlify deploys & circleci tests./i)
+  })
+  it(`should render the info`, () => {
+    cy.getByText(/circleci projects/i)
+  })
+  it(`should render the repository title`, () => {
+    cy.getByText(/gatsby-themes-by-lekoarts/i)
+  })
+  it(`should render the circleci icon`, () => {
+    cy.getByLabelText(/view gatsby-themes-by-lekoarts on circleci/i)
+  })
+  it(`should render the github icon`, () => {
+    cy.getByLabelText(/view gatsby-themes-by-lekoarts source on github/i)
+  })
+  it(`should render the netlify status badge`, () => {
+    cy.getByAltText(/netlify deploy status of gatsby-themes-by-lekoarts/i)
+  })
+  it(`should render the circleci status badge`, () => {
+    cy.getByAltText(/circleci status of gatsby-themes-by-lekoarts/i)
+  })
+  it(`should render the footer`, () => {
+    cy.getByText(/theme by lekoarts/i)
+  })
+})

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/plugins/index.js

@@ -0,0 +1,17 @@
+// ***********************************************************
+// 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)
+
+module.exports = (on, config) => {
+  // `on` is used to hook into various events Cypress emits
+  // `config` is the resolved Cypress config
+}

cypress/support/commands.js

@@ -0,0 +1,29 @@
+// ***********************************************
+// 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 is will overwrite an existing command --
+// Cypress.Commands.overwrite("visit", (originalFn, url, options) => { ... })
+
+Cypress.Commands.add(`assertRoute`, route => {
+  cy.url().should(`equal`, `${window.location.origin}${route}`)
+})

cypress/support/index.d.ts

@@ -0,0 +1,17 @@
+/// <reference types="cypress" />
+
+declare namespace Cypress {
+  interface Chainable<Subject> {
+    /**
+     * Assert the current URL
+     * @param route
+     * @example cy.assertRoute('/page-2')
+     */
+    assertRoute(route: string): Chainable<any>
+
+    /**
+     * Waits for Gatsby to finish the route change, in order to ensure event handlers are properly setup
+     */
+    waitForRouteChange(): Chainable<any>
+  }
+}