Add more assembly version testing for SharedFx/Targeting pack (#25474)

* Add more assembly version tests packs

* Add more tests

* Fix test, feedback

src/Framework/test/SharedFxTests.cs

@@ -2,8 +2,12 @@
 // Licensed under the Apache License, Version 2.0. See License.txt in the project root for license information.
 
 using System;
+using System.Collections.Generic;
 using System.IO;
 using System.Linq;
+using System.Reflection;
+using System.Reflection.Metadata;
+using System.Reflection.PortableExecutable;
 using Newtonsoft.Json.Linq;
 using Xunit;
 using Xunit.Abstractions;
@@ -81,7 +85,7 @@ namespace Microsoft.AspNetCore
         }
 
         [Fact]
-        public void ItContainsValidRuntimeConfigFile()
+        public void SharedFrameworkContainsValidRuntimeConfigFile()
         {
             var runtimeConfigFilePath = Path.Combine(_sharedFxRoot, "Microsoft.AspNetCore.App.runtimeconfig.json");
 
@@ -98,7 +102,7 @@ namespace Microsoft.AspNetCore
         }
 
         [Fact]
-        public void ItContainsValidDepsJson()
+        public void SharedFrameworkContainsValidDepsJson()
         {
             var depsFilePath = Path.Combine(_sharedFxRoot, "Microsoft.AspNetCore.App.deps.json");
 
@@ -155,6 +159,46 @@ namespace Microsoft.AspNetCore
             }
         }
 
+        [Fact]
+        public void SharedFrameworkAssembliesHaveExpectedAssemblyVersions()
+        {
+            // Only test managed assemblies
+            IEnumerable<string> dlls = Directory.GetFiles(_sharedFxRoot, "*.dll", SearchOption.AllDirectories).Where(i => !i.Contains("aspnetcorev2_inprocess"));
+            Assert.NotEmpty(dlls);
+
+            Assert.All(dlls, path =>
+            {
+                using var fileStream = File.OpenRead(path);
+                using var peReader = new PEReader(fileStream, PEStreamOptions.Default);
+                var reader = peReader.GetMetadataReader(MetadataReaderOptions.Default);
+                var assemblyDefinition = reader.GetAssemblyDefinition();
+
+                // Assembly versions should all match Major.Minor.0.0
+                Assert.Equal(0, assemblyDefinition.Version.Build);
+                Assert.Equal(0, assemblyDefinition.Version.Revision);
+            });
+        }
+
+        [Fact]
+        public void SharedFrameworkAssemblyReferencesHaveExpectedAssemblyVersions()
+        {
+            IEnumerable<string> dlls = Directory.GetFiles(_sharedFxRoot, "*.dll", SearchOption.AllDirectories).Where(i => !i.Contains("aspnetcorev2_inprocess") && !i.Contains("System.Security.Cryptography.Xml", StringComparison.OrdinalIgnoreCase));
+            Assert.NotEmpty(dlls);
+
+            Assert.All(dlls, path =>
+            {
+                using var fileStream = File.OpenRead(path);
+                using var peReader = new PEReader(fileStream, PEStreamOptions.Default);
+                var reader = peReader.GetMetadataReader(MetadataReaderOptions.Default);
+                
+                Assert.All(reader.AssemblyReferences, handle =>
+                {
+                    var reference = reader.GetAssemblyReference(handle);
+                    Assert.Equal(0, reference.Version.Revision);
+                });
+            });
+        }
+
         [Fact]
         public void ItContainsVersionFile()
         {

src/Framework/test/TargetingPackTests.cs

@@ -89,6 +89,31 @@ namespace Microsoft.AspNetCore
             });
         }
 
+        [Fact]
+        public void RefAssemblyReferencesHaveExpectedAssemblyVersions()
+        {
+            if (!_isTargetingPackBuilding)
+            {
+                return;
+            }
+
+            IEnumerable<string> dlls = Directory.GetFiles(Path.Combine(_targetingPackRoot, "ref", _targetingPackTfm), "*.dll", SearchOption.AllDirectories);
+            Assert.NotEmpty(dlls);
+
+            Assert.All(dlls, path =>
+            {
+                using var fileStream = File.OpenRead(path);
+                using var peReader = new PEReader(fileStream, PEStreamOptions.Default);
+                var reader = peReader.GetMetadataReader(MetadataReaderOptions.Default);
+                
+                Assert.All(reader.AssemblyReferences, handle =>
+                {
+                    var reference = reader.GetAssemblyReference(handle);
+                    Assert.Equal(0, reference.Version.Revision);
+                });
+            });
+        }
+
         [Fact]
         public void PackageOverridesContainsCorrectEntries()
         {