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: caller_test.go
    path of file: ./repos/moby/libnetwork/internal/caller
    
    the code of the file until where you have to start completion: package caller

import (
	"testing"
)

func fun1() string {
	return Name(0)
}

func fun2() string {
	return Name(1)
}

func fun3() string {
	return fun4()
}

func fun4() stri
    
func TestCaller(t *testing.T) {
	funName := fun1()
	if funName != "fun1" {
		t.Fatalf("error on fun1 caller %s", funName)
	}

	funName = fun2()
	if funName != "TestCaller" {
		t.Fatalf("error on fun2 caller %s", funName)
	}

	funName = fun3()
	if funName != "fun4" {
		t.Fatalf("error on fun2 caller %s", funName)
	}

	funName = fun5()
	if funName != "fun5" {
		t.Fatalf("error on fun5 caller %s", funName)
	}
}