From a51a554958fa295cd9557af4c107d57781b9b9f1 Mon Sep 17 00:00:00 2001
From: Adam Rocska <adam.rocska@adams.solutions>
Date: Thu, 7 May 2020 18:18:49 +0200
Subject: [PATCH] Fixed the broken tests.

Signed-off-by: Adam Rocska <adam.rocska@adams.solutions>
---
 Sources/MaxMindDBReader/IpAddress.swift | 16 ++++++++++------
 1 file changed, 10 insertions(+), 6 deletions(-)

diff --git a/Sources/MaxMindDBReader/IpAddress.swift b/Sources/MaxMindDBReader/IpAddress.swift
index 6171e5e..e0440a2 100644
--- a/Sources/MaxMindDBReader/IpAddress.swift
+++ b/Sources/MaxMindDBReader/IpAddress.swift
@@ -45,17 +45,21 @@ public enum IpAddress: Equatable {
   }
 
   static func v6(_ string: String) -> IpAddress {
-    let inputRawChunks = string.split(separator: ":")
+    if string == "::1" {
+      print(string)
+    }
+    let inputRawChunks = string.split(separator: ":", omittingEmptySubsequences: false)
     precondition(inputRawChunks.count <= 8, "IPv6 strings must have at most 8 bytes defined.")
     var prefixBytes: [UInt8] = []
     var suffixBytes: [UInt8] = []
-    var shouldProcessPrefix  = true
+    var emptyChunksFound  = 0
     for chunk in inputRawChunks {
+      precondition(chunk.count <= 4, "Invalid hexadectet provided : \"\(chunk)\".")
       if chunk.isEmpty {
-        if !shouldProcessPrefix {
+        if emptyChunksFound >= 2 {
           preconditionFailure("Invalid IPv6 format provided.")
         }
-        shouldProcessPrefix = false
+        emptyChunksFound += 1
         continue
       }
       let hexadectet      = String(repeating: "0", count: 4 - chunk.count) + chunk
@@ -64,11 +68,11 @@ public enum IpAddress: Equatable {
       guard let byte1 = UInt8(hexadectet[..<separationIndex], radix: 16) else {
         preconditionFailure("Invalid hexadectet defined: \(hexadectet)")
       }
-      guard let byte2 = UInt8(hexadectet[..<separationIndex], radix: 16) else {
+      guard let byte2 = UInt8(hexadectet[separationIndex...], radix: 16) else {
         preconditionFailure("Invalid hexadectet defined: \(hexadectet)")
       }
 
-      if shouldProcessPrefix {
+      if emptyChunksFound == 0 {
         prefixBytes.append(byte1)
         prefixBytes.append(byte2)
       } else {