Fix valid host check for vanity urls

CredentialProvider.Microsoft.Tests/CredentialProviders/Vsts/VstsCredentialProviderTests.cs

@@ -82,10 +82,10 @@ namespace CredentialProvider.Microsoft.Tests.CredentialProviders.Vsts
             {
                 @"http://example.pkgs.vsts.me/_packaging/TestFeed/nuget/v3/index.json",
                 @"https://example.pkgs.vsts.me/_packaging/TestFeed/nuget/v3/index.json",
-                @"https://example.pkgs.codedev.ms/_packaging/TestFeed/nuget/v3/index.json",
-                @"https://example.pkgs.codeapp.ms/_packaging/TestFeed/nuget/v3/index.json",
+                @"https://pkgs.codedev.ms/example/_packaging/TestFeed/nuget/v3/index.json",
+                @"https://pkgs.codeapp.ms/example/_packaging/TestFeed/nuget/v3/index.json",
                 @"https://example.pkgs.visualstudio.com/_packaging/TestFeed/nuget/v3/index.json",
-                @"https://example.pkgs.dev.azure.com/_packaging/TestFeed/nuget/v3/index.json",
+                @"https://pkgs.dev.azure.com/example/_packaging/TestFeed/nuget/v3/index.json",
             };
 
             foreach (var source in sources)
@@ -100,7 +100,7 @@ namespace CredentialProvider.Microsoft.Tests.CredentialProviders.Vsts
         }
 
         [TestMethod]
-        public async Task CanProvideCredentials_ReturnsTrueForOverridenSources()
+        public async Task CanProvideCredentials_ReturnsTrueForOverriddenSources()
         {
             var sources = new[]
             {
@@ -113,7 +113,7 @@ namespace CredentialProvider.Microsoft.Tests.CredentialProviders.Vsts
             foreach (var source in sources)
             {
                 var canProvideCredentials = await vstsCredentialProvider.CanProvideCredentialsAsync(source);
-                canProvideCredentials.Should().BeTrue($"because {source} is an overriden host");
+                canProvideCredentials.Should().BeTrue($"because {source} is an overridden host");
             }
 
             mockAuthUtil

CredentialProvider.Microsoft/CredentialProviders/Vsts/VstsCredentialProvider.cs

@@ -49,16 +49,18 @@ namespace NuGetCredentialProvider.CredentialProviders.Vsts
                 return false;
             }
 
-             var validHosts = EnvUtil.GetHostsFromEnvironment(Logger, EnvUtil.SupportedHostsEnvVar, new[]
-             {
-                 ".pkgs.vsts.me", // DevFabric
-                 ".pkgs.codedev.ms", // DevFabric
-                 ".pkgs.codeapp.ms", // AppFabric
-                 ".pkgs.visualstudio.com", // Prod
-                 ".pkgs.dev.azure.com" // Prod
-             });
+            var validHosts = EnvUtil.GetHostsFromEnvironment(Logger, EnvUtil.SupportedHostsEnvVar, new[]
+            {
+                ".pkgs.vsts.me", // DevFabric
+                "pkgs.codedev.ms", // DevFabric
+                "pkgs.codeapp.ms", // AppFabric
+                ".pkgs.visualstudio.com", // Prod
+                "pkgs.dev.azure.com" // Prod
+            });
 
-            bool isValidHost = validHosts.Any(host => uri.Host.EndsWith(host, StringComparison.OrdinalIgnoreCase));
+            bool isValidHost = validHosts.Any(host => host.StartsWith(".") ?
+                uri.Host.EndsWith(host, StringComparison.OrdinalIgnoreCase) :
+                uri.Host.Equals(host, StringComparison.OrdinalIgnoreCase));
             if (isValidHost)
             {
                 Verbose(string.Format(Resources.HostAccepted, uri.Host));