Cypress commands for conditionally logging into WordPress. Add to cypress/support/commands.js

commands.js

Cypress.Commands.add('login', () => {

    // Fetch username and password from the cypress.env.json file.
    const username = Cypress.env('wpUsername');
    const password = Cypress.env('wpPassword');

    cy
        .getCookies()
        .then(cookies => {
            let hasMatch = false;
            cookies.forEach((cookie) => {
                if (cookie.name.substr(0, 20) === 'wordpress_logged_in_') {
                    hasMatch = true;
                }
            });
            if (!hasMatch) {
                cy.visit('/wp-login.php').wait(1000);
                cy.get('#user_login').type(username);
                cy.get('#user_pass').type(`${password}{enter}`);
            }
        });
});

Cypress.Commands.add('logout', () => {
    cy
        .getCookies()
        .then(
            cookies => {
                cookies.forEach(
                    cookie => {
                        cy.clearCookie(cookie.name);
                    }
                )
            }
        );
});