Better handling of IPv6 with HTTP proxy

tests/standalone/io/http_proxy_configuration_test.dart

Index: tests/standalone/io/http_proxy_configuration_test.dart
diff --git a/tests/standalone/io/http_proxy_configuration_test.dart b/tests/standalone/io/http_proxy_configuration_test.dart
index 4bff020028faa507bcabd6ce3afecd989187c452..64aa3b0254e7b5e2eaf9826ce7e8fafb9d3d2f0b 100644
--- a/tests/standalone/io/http_proxy_configuration_test.dart
+++ b/tests/standalone/io/http_proxy_configuration_test.dart
@@ -19,6 +19,8 @@ expectDirect(String uri, environment) {
 
 main() {
   expectDirect("http://www.google.com", {});
+  expectDirect("http://www.google.com", {"http_proxy": ""});
+  expectDirect("http://www.google.com", {"http_proxy": " "});
 
   expect("PROXY www.proxy.com:1080",
          "http://www.google.com",
@@ -35,12 +37,33 @@ main() {
   expect("PROXY www.proxy.com:8080",
          "http://www.google.com",
          {"http_proxy": "www.proxy.com:8080",
-          "https_proxy": "www.proxy.com:8080"});
+          "https_proxy": "www.proxys.com:8080"});
   expect("PROXY www.proxys.com:8080",
          "https://www.google.com",
          {"http_proxy": "www.proxy.com:8080",
           "https_proxy": "www.proxys.com:8080"});
 
+  expect("PROXY [::FFFF:1]:1080",
+         "http://www.google.com",
+         {"http_proxy": "[::FFFF:1]"});
+  expect("PROXY [::FFFF:2]:1080",
+         "https://www.google.com",
+         {"https_proxy": "[::FFFF:2]"});
+  expect("PROXY [::FFFF:1]:8080",
+         "http://www.google.com",
+         {"http_proxy": "[::FFFF:1]:8080"});
+  expect("PROXY [::FFFF:2]:8080",
+         "https://www.google.com",
+         {"https_proxy": "[::FFFF:2]:8080"});
+  expect("PROXY [::FFFF:1]:8080",
+         "http://www.google.com",
+         {"http_proxy": "[::FFFF:1]:8080",
+          "https_proxy": "[::FFFF:2]:8080"});
+  expect("PROXY [::FFFF:2]:8080",
+         "https://www.google.com",
+         {"http_proxy": "[::FFFF:1]:8080",
+          "https_proxy": "[::FFFF:2]:8080"});
+
   expect("PROXY www.proxy.com:1080",
          "http://www.google.com",
          {"http_proxy": "http://www.proxy.com"});
@@ -56,7 +79,7 @@ main() {
   expect("PROXY www.proxy.com:8080",
          "http://www.google.com",
          {"http_proxy": "http://www.proxy.com:8080/",
-          "https_proxy": "http://www.proxy.com:8080/"});
+          "https_proxy": "http://www.proxys.com:8080/"});
   expect("PROXY www.proxys.com:8080",
          "https://www.google.com",
          {"http_proxy": "http://www.proxy.com:8080/",
@@ -64,12 +87,41 @@ main() {
   expect("PROXY www.proxy.com:8080",
          "http://www.google.com",
          {"http_proxy": "http://www.proxy.com:8080/",
-          "https_proxy": "http://www.proxy.com:8080/index.html"});
+          "https_proxy": "http://www.proxys.com:8080/index.html"});
   expect("PROXY www.proxys.com:8080",
          "https://www.google.com",
          {"http_proxy": "http://www.proxy.com:8080/",
           "https_proxy": "http://www.proxys.com:8080/index.html"});
 
+  expect("PROXY [::FFFF:1]:1080",
+         "http://www.google.com",
+         {"http_proxy": "http://[::FFFF:1]"});
+  expect("PROXY [::FFFF:1]:1080",
+         "http://www.google.com",
+         {"http_proxy": "http://[::FFFF:1]/"});
+  expect("PROXY [::FFFF:1]:8080",
+         "http://www.google.com",
+         {"http_proxy": "http://[::FFFF:1]:8080/"});
+  expect("PROXY [::FFFF:1]:8080",
+         "http://www.google.com",
+         {"http_proxy": "http://[::FFFF:1]:8080/index.html"});
+  expect("PROXY [::FFFF:1]:8080",
+         "http://www.google.com",
+         {"http_proxy": "http://[::FFFF:1]:8080/",
+          "https_proxy": "http://[::FFFF:1]:8080/"});
+  expect("PROXY [::FFFF:2]:8080",
+         "https://www.google.com",
+         {"http_proxy": "http://[::FFFF:1]:8080/",
+          "https_proxy": "http://[::FFFF:2]:8080/"});
+  expect("PROXY [::FFFF:1]:8080",
+         "http://www.google.com",
+         {"http_proxy": "http://[::FFFF:1]:8080/",
+          "https_proxy": "http://[::FFFF:1]:8080/index.html"});
+  expect("PROXY [::FFFF:2]:8080",
+         "https://www.google.com",
+         {"http_proxy": "http://[::FFFF:1]:8080/",
+          "https_proxy": "http://[::FFFF:2]:8080/index.html"});
+
   expectDirect("http://www.google.com",
                {"http_proxy": "www.proxy.com:8080",
                 "no_proxy": "www.google.com"});
@@ -87,4 +139,20 @@ main() {
                 "no_proxy": ",,  , www.google.edu,,.com    "});
   expectDirect("http://www.google.com",
                {"https_proxy": "www.proxy.com:8080"});
+
+  expect("PROXY www.proxy.com:8080",
+         "http://[::FFFF:1]",
+         {"http_proxy": "www.proxy.com:8080",
+          "no_proxy": "["});
+  expect("PROXY www.proxy.com:8080",
+         "http://[::FFFF:1]",
+         {"http_proxy": "www.proxy.com:8080",
+          "no_proxy": "[]"});
+
+  expectDirect("http://[::FFFF:1]",
+               {"http_proxy": "www.proxy.com:8080",
+                "no_proxy": "[::FFFF:1]"});
+  expectDirect("http://[::FFFF:1]",
+               {"http_proxy": "www.proxy.com:8080",
+                "no_proxy": ",,  , www.google.edu,,[::FFFF:1]    "});
 }