Sort fsharpcore baseline, and move them to baseline files

tests/FSharp.Compiler.Service.Tests/FSharp.Compiler.Service.Tests.fsproj

@@ -23,9 +23,7 @@
     <Content Include="expected-help-output.bsl">
       <CopyToOutputDirectory>Never</CopyToOutputDirectory>
     </Content>
-    <Compile Include="..\fsharp\TestHelpers.fs" Link="TestHelpers.fs" />
-    <Compile Include="LibraryTestFx.fs" />
-    <Compile Include="SurfaceArea.netstandard.fs" />
+    <Compile Include="SurfaceArea.fs" Condition="'$(TargetFrameworkIdentifier)' == '.NETCoreApp'"/>
     <Compile Include="..\service\FsUnit.fs">
       <Link>FsUnit.fs</Link>
     </Compile>

tests/FSharp.Compiler.Service.Tests/SurfaceArea.fs

@@ -0,0 +1,38 @@
+// Copyright (c) Microsoft Corporation.  All Rights Reserved.  See License.txt in the project root for license information.
+
+namespace Tests.Service.SurfaceArea
+
+open System.IO
+open System.Reflection
+open NUnit.Framework
+
+type SurfaceAreaTest() =
+    // This relies on a set of baselines to update the baseline set an environment variable before running the tests, then on failure the baselines will be updated
+    // Handled by SurfaceArea.verify
+    //
+    // CMD:
+    //    set TEST_UPDATE_BSL=1
+    // PowerShell:
+    //    $env:TEST_UPDATE_BSL=1
+    // Linux/macOS:
+    //    export TEST_UPDATE_BSL=1
+
+    [<Test>]
+    member _.VerifySurfaceAreaFSharpCompilerService() =
+
+        let platform = "netstandard20"
+
+        let flavor =
+#if DEBUG
+            "debug"
+#else
+            "release"
+#endif
+        let assembly =
+            let path = Path.Combine(Path.GetDirectoryName(typeof<int list>.Assembly.Location), "FSharp.Compiler.Service.dll")
+            Assembly.LoadFrom path
+
+        let baseline = Path.Combine(__SOURCE_DIRECTORY__, $"FSharp.Compiler.Service.SurfaceArea.{platform}.{flavor}.bsl")
+        let outFileName = $"FSharp.Compiler.Service.SurfaceArea.{platform}.{flavor}.out"
+        FSharp.Test.SurfaceArea.verify assembly baseline outFileName
+