How to return Map object from Cypress each?

When performing automated testing in Cypress, it is typically not straightforward to directly return or use standard JavaScript Map objects because Cypress's command chain is Promise-based and does not natively support synchronous return values. However, you can use variables in your tests to simulate Map object behavior for storing and using key-value pairs.

Here is an example demonstrating how to use a Map-like structure to store data in Cypress tests and access and modify this data across different test steps:

javascript
describe('Using a Map-like Object to Store Data', () => {
  let dataStore = {}; // Use a plain object to simulate Map functionality

  before(() => {
    // Initialize data
    dataStore['key1'] = 'value1';
    dataStore['key2'] = 'value2';
  });

  it('Access and verify data', () => {
    // Access stored data
    expect(dataStore['key1']).to.eq('value1');
    expect(dataStore['key2']).to.eq('value2');

    // Modify data
    dataStore['key1'] = 'newValue1';

    // Verify modified data
    expect(dataStore['key1']).to.eq('newValue1');
  });

  it('Access modified data in another test', () => {
    // Verify that data modified in the previous test persists
    expect(dataStore['key1']).to.eq('newValue1');
  });
});

In this example, we create a simple JavaScript object dataStore to simulate Map functionality. We initialize the data in the before hook and access and modify it across different test cases. Since each Cypress command is executed asynchronously, using a regular object to maintain state across test cases is feasible.

If you do need to use a real Map object in your tests and want to work with this data within the command chain, you may need to define custom commands or use the .then() method to handle asynchronous operations, allowing you to manage state correctly in Cypress's asynchronous environment.