url regex :(

test.swift

import Foundation

let qqq = "https://yahoo.com/:;(&;&:93@;&:&&:'’'"
NSURL(string: qqq)

let tests = [
  ("google.com", true),
  ("www.google.com", true),
  ("http://google.com", true),
  ("http://www.google.com", true),
  ("https://google.com", true),
  ("https://www.google.com", true),
  ("google.co", true),
  ("www.google", false),
  ("google.c", false),
  ("www.google.c", false),
  ("http://google.c", false),
  ("http://www.google", false),
  ("http://www.google.c", false),
  ("http://b", false),

  ("abc.com", true),
  ("a-google.com", true),
  ("www.goog", false),
  ("http://www.goog", false),
  ("Google.com", true),

  ("a google.com", true),
  ("a https://b", false),

  ("google.com b", true),
  ("https://b b", false),

  ("a google.com b", true),
  ("a https://b b", false),
]

let regexString = "(^|\\W)((http:\\/\\/|https:\\/\\/)?([w|W]{3}.)?(?![w|W]{3}.)[a-zA-Z0-9]+([\\-\\.]{1}[a-zA-Z0-9]+)*\\.[a-zA-Z]{2,5}(:[0-9]{1,5})?(\\/[[A-Za-z0-9-\\._~:/\\?#\\[\\]@!\\$&'\\(\\)\\*\\+,;=]]*)?)($|(?=\\W))"

let regex = try! NSRegularExpression(pattern: regexString, options: [])
tests.filter { (urlString, expectedResult) in
  let matches = regex.matches(in: urlString, options: [], range: NSRange(location: 0, length: (urlString as NSString).length))
  let ok = (matches.count > 0 && matches.first!.numberOfRanges > 2) == expectedResult
  if !ok {
    print(urlString)
  }
  return !ok
  }.count


let string = "a https://google.com/abc?a=b&c=d#abc’def b"
regex.matches(in: string, options: [], range: NSRange(location: 0, length: (string as NSString).length)).first!.range(at: 2).length == "https://google.com/abc?a=b&c=d#abc".utf16.count


let string2 = "a https://yahoo.com/:;(&;&:93@;&:&&:’a b"
regex.matches(in: string2, options: [], range: NSRange(location: 0, length: (string2 as NSString).length)).first!.range(at: 2).length == "https://yahoo.com/:;(&;&:93@;&:&&:".utf16.count