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: verify_test.go
    path of file: ./repos/kubernetes-ingress/internal/nginx
    
    the code of the file until where you have to start completion: package nginx

import (
	"bytes"
	"io"
    
func TestConfigWriter(t *testing.T) {
	t.Parallel()
	cw, err := newVerifyConfigGenerator()
	if err != nil {
		t.Fatalf("error instantiating ConfigWriter: %v", err)
	}
	config, err := cw.GenerateVersionConfig(1, true)
	if err != nil {
		t.Errorf("error generating version config: %v", err)
	}
	if !strings.Contains(string(config), "configVersion") {
		t.Errorf("configVersion endpoint not set. config contents: %v", string(config))
	}
	if !strings.Contains(string(config), "opentracing off") {
		t.Errorf("opentracing directive missing when is enabled. config contents: %v", string(config))
	}
}