Function pact_mock_server::write_pact_file

pub extern "C" fn write_pact_file(
    mock_server_port: i32, 
    directory: Option<String>
) -> Result<(), WritePactFileErr>

Trigger a mock server to write out its pact file. This function should be called if all the consumer tests have passed. The directory to write the file to is passed as the second parameter. If None is passed in, the current working directory is used.

Returns Ok if the pact file was successfully written. Returns an Err if the file can not be written, or there is no mock server running on that port.