You are an expert in writing code in many different languages. Your goal is to perform code completion for the following code, keeping in mind the rest of the code and the file meta data.
    Metadata details:
    filename: communications_test.go
    path of file: ./repos/gocryptotrader/communications
    
    the code of the file until where you have to start completion: package communications

import (
	"testing"

	"github.com/thrasher-c
    
func TestNewComm(t *testing.T) {
	var cfg base.CommunicationsConfig
	if _, err := NewComm(&cfg); err == nil {
		t.Error("NewComm should have failed on no enabled communication mediums")
	}

	cfg.TelegramConfig.Enabled = true
	cfg.SMSGlobalConfig.Enabled = true
	cfg.SMTPConfig.Enabled = true
	cfg.SlackConfig.Enabled = true
	communications, err := NewComm(&cfg)
	if err != nil {
		t.Error("Unexpected result")
	}

	if len(communications.IComm) != 4 {
		t.Errorf("communications NewComm, expected len 4, got len %d",
			len(communications.IComm))
	}
}