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Data seed in MYSQL + Cypress


Here are the general steps to seed test data in a MySQL database using Cypress:

  1. Install the necessary dependencies:
  • Cypress (npm install cypress)
  • A library for interacting with MySQL, such as mysql2 (npm install mysql2)
  1. Set up a test environment with a running MySQL server. This can be done by either installing MySQL on your local machine or by creating a remote server.
  2. Create a new file in your Cypress project where you will store your database configuration. This should include details like the host, port, username, and password of your MySQL server.
  3. Create a new script that will insert data into your MySQL tables. This can be done by using the methods provided by the library you chose in step 1, and connecting to the MySQL server using the configuration file created in step 3.
  4. Run the script before the test execution.
  5. In your Cypress tests, you can use the same library to interact with your MySQL server, running SQL queries and checking the results.

Here is an example of a Cypress test that uses the mysql2 library to check if the number of rows in a table is equal to the expected number:

describe('MySQL Test', function() {
  before(() => {
    // Connect to the MySQL server
    let connection = mysql.createConnection({
      host: 'localhost',
      user: 'root',
      password: 'password',
      database: 'test_db'

    // Insert test data into the 'my_table'
    connection.query("INSERT INTO my_table (id, name) VALUES (1, 'John Doe')");

  it('Check the number of rows in a table', function() {
    cy.task('query', 'SELECT COUNT(*) FROM my_table')
      .then(res => {

It is important to note that Cypress is a front-end testing tool and MySQL is a back-end database, so the integration will likely involve setting up a test environment with a MySQL server running, and configuring your Cypress tests to connect to that server.

It’s also important to clean up the test data after each test run, so the tests do not interfere with each other.

For more interesting blogs . Click here

Special thanks to: Ghulam Nabi

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