[Feature][WIP] Introduce cypress

cypress.json

@@ -0,0 +1 @@
+{}

cypress/integration/sample_spec.js

@@ -0,0 +1,5 @@
+describe('Sample Test', () => {
+  it('go to any repository pages', () => {
+    cy.visit('https://github.com/shinenic/a-tree')
+  })
+})

cypress/plugins/index.js

@@ -0,0 +1,14 @@
+const path = require('path')
+
+// @FIXME Correct the path
+const BUILD_PATH = path.resolve(__dirname, '..', '..', 'dist')
+
+module.exports = (on) => {
+  on('before:browser:launch', (browser, launchOptions) => {
+    console.log('launching browser %o', browser)
+
+    launchOptions.extensions.push(BUILD_PATH)
+
+    return launchOptions
+  })
+}

package.json

@@ -82,6 +82,7 @@
     "babel-plugin-lodash": "^3.3.4",
     "copy-webpack-plugin": "^9.0.1",
     "cross-env": "^7.0.3",
+    "cypress": "^9.1.1",
     "eslint": "^7.32.0",
     "eslint-config-airbnb": "^18.2.1",
     "eslint-plugin-import": "^2.24.2",
@@ -91,9 +92,9 @@
     "eslint-plugin-simple-import-sort": "^7.0.0",
     "file-icons-js": "websemantics/file-icons-js",
     "html-webpack-plugin": "^5.3.2",
-    "jquery-pjax": "^2.0.1",
     "jest": "^27.4.3",
     "jest-puppeteer": "^6.0.2",
+    "jquery-pjax": "^2.0.1",
     "lodash-webpack-plugin": "^0.11.6",
     "prettier-eslint": "^13.0.0",
     "puppeteer": "^13.0.0",

src/index.js

@@ -11,6 +11,25 @@ import MainThemeProvider from 'styles/Provider'
 
 import App from './App'
 
+/**
+ * @FIXME
+ * If we want to use `cypress` to test the extension,
+ * need to notice that cypress test the target window in a `iframe`,
+ * so all of the dom operations & queries have to be done in the `iframe`.
+ *
+ * (This is a sample solution)
+ */
+const handleCypressTesting = () => {
+  const iframeWindow = window.document
+    .querySelector('iframe')
+    .contentWindow.document.createElement('div')
+
+  // eslint-disable-next-line
+  window._window = iframeWindow
+  // eslint-disable-next-line
+  window._document = iframeWindow.document
+}
+
 const checkDomainMatched = (domains) => {
   const { host } = window.location