Work with PAC files for Flutter tests

Use a Proxy Auto-Configuration file to route Local Testing traffic for your Flutter integration tests on BrowserStack App Automate.

A PAC file lets you define rules that decide which requests go through a proxy and which connect directly. When your network relies on a PAC file, point the Local binary to it so that your Flutter tests resolve traffic the same way your machine does.

Establish a connection with a PAC file

A PAC file contains a JavaScript function that determines whether a request goes through the proxy server. After you have the absolute path of the PAC file on your machine, use the --pac-file flag to establish the Local Testing connection:

To resolve all requests on BrowserStack devices through your PAC proxy, add the --force-proxy and --force-local flags to the command. Without these flags, the Local binary tries to connect directly for better performance.

Sample PAC file

The following function checks whether the hostname is a plain hostname. If it is, the connection is direct. Otherwise, the connection goes through the proxy:

If you’re unsure about the proxy script or need permission to modify it, please reach out to your IT or network support team.

Run your build through the connection

After the connection is established, set the local parameter to true in your build REST API request: