Add code coverage

.coverage.babelrc

@@ -0,0 +1,4 @@
+{
+  "presets": ["@babel/preset-react"],
+  "plugins": ["istanbul", "@babel/plugin-transform-modules-commonjs"]
+}

cypress/plugins/index.js

@@ -18,4 +18,7 @@
 module.exports = (on, config) => {
   // `on` is used to hook into various events Cypress emits
   // `config` is the resolved Cypress config
+  require('@cypress/code-coverage/task')(on, config)
+  on('file:preprocessor', require('@cypress/code-coverage/use-babelrc'))
+  return config
 };

cypress/support/index.js

@@ -16,6 +16,9 @@
 // Import commands.js using ES2015 syntax:
 import './commands';
 
+//Generate code-coverage
+import '@cypress/code-coverage/support';
+
 // Alternatively you can use CommonJS syntax:
 // require('./commands')