#927 Adding support for cypress and Percy

cypress/helpers/util.js

@@ -0,0 +1,28 @@
+/* eslint-env jest */
+import { Base64 } from 'js-base64'
+
+export const mermaidUrl = (graphStr, options, api) => {
+  const obj = {
+    code: graphStr,
+    mermaid: options
+  }
+  const objStr = JSON.stringify(obj)
+  let url = 'http://localhost:9000/e2e.html?graph=' + Base64.encodeURI(objStr)
+  if (api) {
+    url = 'http://localhost:9000/xss.html?graph=' + graphStr
+  }
+
+  if (options.listUrl) {
+    cy.log(options.listId, ' ', url)
+  }
+
+  return url
+}
+
+export const imgSnapshotTest =  (graphStr, options, api) => {
+  const url = mermaidUrl(graphStr, options, api)
+
+  cy.visit(url);
+  cy.get('svg')
+  cy.percySnapshot()
+}