fix authority normalization (#7)

* fix authority normalization

* add normalize userinfo test case

* add test to resolveTests array

Author: srivastava-diya

lib/index.js

@@ -88,6 +88,9 @@ const resolveReference = (strategy) => (reference, base) => {
 
     if (resolvedComponents.authority === undefined) {
       resolvedComponents.authority = baseComponents.authority;
+      resolvedComponents.userinfo = baseComponents.userinfo;
+      resolvedComponents.host = baseComponents.host;
+      resolvedComponents.port = baseComponents.port;
 
       if (resolvedComponents.path === "") {
         resolvedComponents.path = baseComponents.path;
@@ -165,7 +168,10 @@ const getSegment = (path) => {
 /** @type (strategy: Strategy, components: API.IdentifierComponents) => string */
 const composeIdentifier = (strategy, components) => {
   let resolved = components.scheme.toLowerCase() + ":";
-  resolved += components.authority === undefined ? "" : "//" + components.authority.toLowerCase();
+  resolved += components.authority === undefined ? "" : "//"
+    + (components.userinfo === undefined ? "" : components.userinfo + "@")
+    + components.host.toLowerCase()
+    + (components.port === undefined ? "" : ":" + components.port);
   resolved += strategy.normalizePath(components.path);
   resolved += components.query === undefined ? "" : "?" + strategy.normalizeQuery(components.query);
   resolved += components.fragment === undefined ? "" : "#" + strategy.normalizeFragment(components.fragment);

lib/resolve-reference.test.js

@@ -54,7 +54,8 @@ const resolveTests = [
   ["http://example.com/b%2Fc/d/e", "", "http://example.com/b%2Fc/d/e"], // Necessary encoding segment
   ["http://example.com/b%2fc/d/e", "", "http://example.com/b%2Fc/d/e"], // Case normalization of encoding segment
   ["http://example.com/b?c%2Fd%3Fe", "", "http://example.com/b?c/d?e"], // Unnecessary encoding query
-  ["http://example.com/b", "#c%2Fd%3Fe", "http://example.com/b#c/d?e"] // Unnecessary encoding fragment
+  ["http://example.com/b", "#c%2Fd%3Fe", "http://example.com/b#c/d?e"], // Unnecessary encoding fragment
+  ["Https://JDesrosiers@Example.com", "", "https://JDesrosiers@example.com"] // Case normalization of authority
 ];
 
 describe("resolveReference", () => {