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Cypress Visual Testing Introduction

· 2 min read
Terence Kong

Step 1: Create a new react app​

npx create-react-app demo-cypress --template typescript
yarn create react-app demo-cypress --template typescript

Change directory​

cd demo-cypress

current directory

npm install cypress @cypress/react --save-dev
yarn add -D cypress @cypress/react
  • tested with "@cypress/react": "^6.0.0", "cypress": "^10.4.0"

Step 3: Open Cypress​

If running the first time, you might need to verify first​

npm run cypress verify
yarn run cypress verify

Open cypress to setup configurations​

npm run cypress open
yarn run cypress open

initial cypress config

Step 4: Click on Component Testing to setup basic configs​

Select frontend framework type​

select frontend framework

Install dev dependencies​

dev dependencies

Auto generate configuration files​

new generated files

new configuration files

Choose browser type​

choose browser

Step 5: Create new test file​

create first spec

Create test file with desired name​

create test file

New file will be auto generated​

new test file

Run the test or create a new test file​

run test

Step 6: Modify the test file​

Initial test code​

describe("App.cy.tsx", () => {
  it("playground", () => {
    // cy.mount()
  });
});

initial test run

New passing sample test code​

import * as React from "react";
import App from "../../src/App";
import {mount} from "@cypress/react";

it("renders react app", () => {
  mount(<App />);
  cy.contains(/learn react/i).should("be.visible");
});

passing test code

Failing sample test code​

import * as React from "react";
import App from "../../src/App";
import {mount} from "@cypress/react";

it("renders react app", () => {
  mount(<App />);
  cy.contains(/learn react not working/i).should("be.visible");
});

failing test code