Fix nullability error in CI build

.justfile

@@ -16,11 +16,11 @@ clean:
 
 test-platform: pack
   cd test/mtp && dotnet clean ../Sample.Test/Sample.Test.fsproj -v:quiet
-  cd test/mtp && dotnet test ../Sample.Test/Sample.Test.fsproj -p:EnableExpectoTestingPlatformIntegration=true -p:IncludeFailingTests=false
+  cd test/mtp && dotnet test --project ../Sample.Test/Sample.Test.fsproj -p:EnableExpectoTestingPlatformIntegration=true -p:IncludeFailingTests=false
 
 test-platform-failing: pack
   cd test/mtp && dotnet clean ../Sample.Test/Sample.Test.fsproj -v:quiet
-  cd test/mtp && dotnet test ../Sample.Test/Sample.Test.fsproj -p:EnableExpectoTestingPlatformIntegration=true -p:IncludeFailingTests=true
+  cd test/mtp && dotnet test --project ../Sample.Test/Sample.Test.fsproj -p:EnableExpectoTestingPlatformIntegration=true -p:IncludeFailingTests=true
 
 test-legacy: pack
   dotnet clean ./test/Sample.Test/Sample.Test.fsproj -v:quiet

global.json

@@ -1,6 +1,6 @@
 {
   "sdk": {
-    "version": "10.0.301",
+    "version": "10.0.109",
     "rollForward": "latestMajor"
   },
   "msbuild-sdks": {

src/YoloDev.Expecto.TestSdk/YoloDev.Expecto.TestSdk.fsproj

@@ -7,6 +7,7 @@
     <OutputType>Exe</OutputType>
     <PackageId>$(MSBuildProjectName)</PackageId>
     <IsTestingPlatformApplication>false</IsTestingPlatformApplication>
+    <Nullable>enable</Nullable>
   </PropertyGroup>
 
   <ItemGroup>

src/YoloDev.Expecto.TestSdk/adapter.fs

@@ -67,8 +67,7 @@ type VsTestAdapter() =
       let logger = Logger(frameworkHandle, stopwatch)
 
       let runSettings =
-        Option.ofObj runContext
-        |> Option.bind (fun c -> Option.ofObj c.RunSettings)
+        runContext.RunSettings |> Option.ofObj
         |> Option.map (RunSettings.read logger)
         |> Option.defaultValue RunSettings.defaultSettings
 
@@ -85,8 +84,8 @@ type VsTestAdapter() =
       let logger = Logger(frameworkHandle, stopwatch)
 
       let runSettings =
-        Option.ofObj runContext
-        |> Option.bind (fun c -> Option.ofObj c.RunSettings)
+        runContext.RunSettings
+        |> Option.ofObj
         |> Option.map (RunSettings.read logger)
         |> Option.map (RunSettings.filter runContext)
         |> Option.defaultValue RunSettings.defaultSettings

src/YoloDev.Expecto.TestSdk/helpers.fs

@@ -3,10 +3,10 @@ module internal YoloDev.Expecto.TestSdk.Helpers
 
 [<RequireQualifiedAccess>]
 module internal Guard =
-  let inline argNotNull (name: string) (arg: 'a) =
+  let inline argNotNull (name: string) (arg: 'a | null) : 'a =
     match arg with
     | null -> nullArg name
-    | _ -> arg
+    | notNull -> notNull
 
 [<RequireQualifiedAccess>]
 module internal Seq =