Fixed breadcrumb links for packages with build metadata (#8157)

* Fixed breadcrumb links for packages with build metadata #8136

* added null reference check

* added unit test

* removed extraneous newlines

* fixed test as links now have normalised version numbers on the end

Address #8136

Author: rocklan

src/NuGetGallery/UrlHelperExtensions.cs

@@ -228,14 +228,16 @@ public static string Package(
             string version,
             bool relativeUrl = true)
         {
+            string normalized = (version != null) ? NuGetVersionFormatter.Normalize(version) : version;
+
             string result = GetRouteLink(
                 url,
                 RouteName.DisplayPackage,
                 relativeUrl,
                 routeValues: new RouteValueDictionary
                 {
                     { "id", id },
-                    { "version", version }
+                    { "version", normalized }
                 });
 
             // Ensure trailing slashes for versionless package URLs, as a fix for package filenames that look like known file extensions

tests/NuGetGallery.Facts/Controllers/ApiControllerFacts.cs

@@ -2856,8 +2856,8 @@ public async Task VerifyRecentPopularityStatsDownloads()
 
                 JArray result = JArray.Parse(contentResult.Content);
 
-                Assert.True((string)result[3]["Gallery"] == "/packages/B/1.1", "unexpected content result[3].Gallery");
-                Assert.True((int)result[2]["Downloads"] == 5, "unexpected content result[2].Downloads");
+                Assert.Equal("/packages/B/1.1.0", (string)result[3]["Gallery"]);
+                Assert.Equal(5, (int)result[2]["Downloads"]);
             }
 
             [Fact]

tests/NuGetGallery.Facts/UrlHelperExtensionsFacts.cs

@@ -30,6 +30,29 @@ public void PropagatesNull()
                 Assert.Null(fixedUrl);
             }
         }
+    
+        public class ThePackageBaseHelperMethod
+            : TestContainer
+        {
+            [Fact]
+            public void UsesNormalizedVersionInUrls()
+            {
+                var package = new Package
+                {
+                    PackageRegistration = new PackageRegistration
+                    {
+                        Id = "TestPackageId"
+                    },
+                    NormalizedVersion = "1.0.0-alpha.1",
+                    Version = "1.0.0-alpha.1+metadata"
+                };
+
+                string fixedUrl = UrlHelperExtensions.Package(TestUtility.MockUrlHelper(), package.Id, package.Version);
+
+                Assert.DoesNotContain("metadata", fixedUrl);
+                Assert.EndsWith(package.NormalizedVersion, fixedUrl);
+            }
+        }
 
         public class ThePackageHelperMethod
             : TestContainer