Add portal test

Author: dmtrKovalenko

cypress/integration/portal-spec.js

@@ -0,0 +1,26 @@
+import React from "react";
+import ReactDOM from "react-dom";
+import { mount } from "cypress-react-unit-tests";
+
+const RenderInPortal = ({ children }) => {
+ return ReactDOM.createPortal(children, document.body);
+};
+
+const MyComponent = () => (
+ <div id="component">
+ <p>Hello World!</p>
+ <RenderInPortal>
+ <p> I am in portal </p>
+ </RenderInPortal>
+ </div>
+);
+
+describe("Portals", () => {
+ it("renders content inside the portal", () => {
+ mount(<MyComponent />);
+
+ cy.contains("#component", "Hello World!");
+ cy.get("#component").should("not.contain", "I am in portal");
+ cy.get("body").contains("I am in portal");
+ });
+});