What are the steps to configure Charles proxy in the WebDriver IO Mocha automation framework?

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Assuming you have already installed Charles proxy and WebDriver IO Mocha automation framework, follow these steps:

1. Start Charles proxy and make sure that it is running on your local machine.
2. In the WebDriver IO configuration file, add the following code to set the proxy settings:

// Set Charles Proxy settings
exports.config = {
  ...
  capabilities: [{
    browserName: 'chrome',
    chromeOptions: {
      proxy: {
        proxyType: 'manual',
        httpProxy: 'localhost:8888' // replace with Charles proxy port number
      }
    }
  }],
  ...
}

1. Restart your WebDriver IO test runner to apply the changes.
2. Launch your test script and you should see the traffic being recorded in the Charles proxy window.

Note: If you have configured HTTPS requests in your test script, you may need to add SSL proxy settings to the Charles proxy configuration.