Tests to ensure column names are matching data.

name: empty.html?xhr/devtools/network/resources
method: GET
status: 200OK
protocol: http/1.1
scheme: http
domain: 127.0.0.1
remoteaddress: 127.0.0.1:8000
type: xhr
initiator: network-columns-visible.js:13Script
cookies: 0
setcookies: 0
priority: High
cache-control: 
connection: Keep-Alive
content-encoding: 
content-length: 0
vary: