[BCL] add tests to understand error on azure pipelines.

Author: reegeek

src/StructLinq.BCL.Tests/ListLayoutTests.cs

@@ -1,14 +1,73 @@
 using System;
 using System.Collections.Generic;
+using System.Diagnostics;
 using System.Linq;
+using System.Reflection;
+using System.Reflection.Emit;
+using System.Runtime.InteropServices;
+using System.Runtime.Serialization;
 using FluentAssertions;
+using ObjectLayoutInspector;
 using StructLinq.BCL.List;
 using Xunit;
 
 namespace StructLinq.BCL.Tests
 {
+
     public class ListLayoutTests
     {
+        [Fact]
+        public void PrintLayout()
+        {
+            TypeLayout.PrintLayout<List<int>>();
+            TypeLayout.PrintLayout<ListLayout<int>>();
+        }
+
+        [Fact]
+        public void ItemsOffsetForInt()
+        {
+            var fieldOffsets = TypeInspector.GetFieldOffsets(typeof(List<int>));
+            var layoutFieldOffsets = TypeInspector.GetFieldOffsets(typeof(ListLayout<int>));
+
+            var (_, offset) = fieldOffsets.Single(x=> x.fieldInfo.Name == "_items");
+            var (_, layoutOffset) = layoutFieldOffsets.Single(x=> x.fieldInfo.Name == "Items");
+            layoutOffset.Should().Be(offset);
+        }
+
+        [Fact]
+        public void SizeOffsetForInt()
+        {
+            var fieldOffsets = TypeInspector.GetFieldOffsets(typeof(List<int>));
+            var layoutFieldOffsets = TypeInspector.GetFieldOffsets(typeof(ListLayout<int>));
+
+            var (_, offset) = fieldOffsets.Single(x=> x.fieldInfo.Name == "_size");
+            var (_, layoutOffset) = layoutFieldOffsets.Single(x=> x.fieldInfo.Name == "Size");
+            layoutOffset.Should().Be(offset);
+        }
+
+        [Fact]
+        public void ItemsOffsetForString()
+        {
+            var fieldOffsets = TypeInspector.GetFieldOffsets(typeof(List<string>));
+            var layoutFieldOffsets = TypeInspector.GetFieldOffsets(typeof(ListLayout<string>));
+
+            var (_, offset) = fieldOffsets.Single(x=> x.fieldInfo.Name == "_items");
+            var (_, layoutOffset) = layoutFieldOffsets.Single(x=> x.fieldInfo.Name == "Items");
+            layoutOffset.Should().Be(offset);
+        }
+
+        [Fact]
+        public void SizeOffsetForString()
+        {
+            var fieldOffsets = TypeInspector.GetFieldOffsets(typeof(List<string>));
+            var layoutFieldOffsets = TypeInspector.GetFieldOffsets(typeof(ListLayout<string>));
+
+            var (_, offset) = fieldOffsets.Single(x=> x.fieldInfo.Name == "_size");
+            var (_, layoutOffset) = layoutFieldOffsets.Single(x=> x.fieldInfo.Name == "Size");
+            layoutOffset.Should().Be(offset);
+        }
+
+
         [Theory]
         [InlineData(0)]
         [InlineData(10)]
@@ -17,7 +76,9 @@ public void ShouldCountMustBe(int size)
         {
             var list = Enumerable.Range(-1, size).ToList();
             var layout = Unsafe.As<List<int>, ListLayout<int>>(ref list);
-            layout.Size.Should().Be(size);
+            var typeLayout = TypeLayout.GetLayout(list.GetType());
+            var layoutLayout = TypeLayout.GetLayout<ListLayout<int>>();
+            layout.Size.Should().Be(size, typeLayout.ToString() + layoutLayout);
         }
 
         [Theory]

src/StructLinq.BCL.Tests/StructLinq.BCL.x64.Tests.csproj

@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
 
   <PropertyGroup>
-    <TargetFrameworks>net452;net472;net48;netcoreapp2.1;netcoreapp2.2;netcoreapp3.0;netcoreapp3.1;net50</TargetFrameworks>
+    <TargetFrameworks>net472;net48;netcoreapp2.1;netcoreapp2.2;netcoreapp3.0;netcoreapp3.1;net50</TargetFrameworks>
     <Platform>x64</Platform>
     <AllowUnsafeBlocks>true</AllowUnsafeBlocks>
     <Platforms>x64</Platforms>
@@ -12,6 +12,7 @@
 
   <ItemGroup>
     <ProjectReference Include="..\StructLinq.BCL\StructLinq.BCL.csproj" />
+    <PackageReference Include="ObjectLayoutInspector" Version="0.1.2" />
   </ItemGroup>
 
 </Project>

src/StructLinq.BCL.Tests/StructLinq.BCL.x86.Tests.csproj

@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
 
   <PropertyGroup>
-    <TargetFrameworks>net452;net472;net48;netcoreapp2.1;netcoreapp2.2;netcoreapp3.0;netcoreapp3.1;net50</TargetFrameworks>
+    <TargetFrameworks>net472;net48;netcoreapp2.1;netcoreapp2.2;netcoreapp3.0;netcoreapp3.1;net50</TargetFrameworks>
     <Platform>x86</Platform>
     <AllowUnsafeBlocks>true</AllowUnsafeBlocks>
     <Platforms>x86</Platforms>
@@ -12,6 +12,7 @@
 
   <ItemGroup>
     <ProjectReference Include="..\StructLinq.BCL\StructLinq.BCL.csproj" />
+    <PackageReference Include="ObjectLayoutInspector" Version="0.1.2" />
   </ItemGroup>
 
 </Project>

src/StructLinq.BCL/List/ListLayout.cs

@@ -1,4 +1,7 @@
 // ReSharper disable InconsistentNaming
+
+using System;
+
 namespace StructLinq.BCL.List
 {
 #if (NETCOREAPP3_0 || NETCOREAPP3_1 || NET5_0)
@@ -12,11 +15,10 @@ internal class ListLayout<T>
     internal class ListLayout<T>
     {
         internal T[] Items;
+#pragma warning disable 649
+        internal Object SyncRoot;
+#pragma warning restore 649
         internal int Size;
-#pragma warning disable 169
-        private int Version;
-        private object SyncRoot;
-#pragma warning restore 169
     }
 #endif