Recognise parallelism attributes (#76)

Consumer/Consumer.fsproj

@@ -10,6 +10,7 @@
     <ItemGroup>
         <Compile Include="NoAttribute.fs" />
         <Compile Include="Inconclusive.fs" />
+        <Compile Include="TestParallel.fs" />
         <Compile Include="TestParameterisedFixture.fs" />
         <Compile Include="TestSetUp.fs" />
         <Compile Include="TestValues.fs" />

Consumer/TestParallel.fs

@@ -0,0 +1,49 @@
+namespace Consumer
+
+open NUnit.Framework
+open FsUnitTyped
+
+[<TestFixture>]
+[<Parallelizable>]
+module TestParallelDefault =
+
+    let defaults = List.init 100 id
+
+    [<TestCaseSource(nameof defaults)>]
+    let ``Default thing`` (i : int) = i |> shouldEqual i
+
+[<TestFixture>]
+[<Parallelizable(ParallelScope.All)>]
+module TestParallelAllScope =
+
+    let defaults = List.init 100 id
+
+    [<TestCaseSource(nameof defaults)>]
+    let ``Default thing`` (i : int) = i |> shouldEqual i
+
+[<TestFixture>]
+[<Parallelizable(ParallelScope.Self)>]
+module TestParallelSelfScope =
+
+    let defaults = List.init 100 id
+
+    [<TestCaseSource(nameof defaults)>]
+    let ``Default thing`` (i : int) = i |> shouldEqual i
+
+[<TestFixture>]
+[<Parallelizable(ParallelScope.Children)>]
+module TestParallelChildrenScope =
+
+    let defaults = List.init 100 id
+
+    [<TestCaseSource(nameof defaults)>]
+    let ``Default thing`` (i : int) = i |> shouldEqual i
+
+[<TestFixture>]
+[<Parallelizable(ParallelScope.Fixtures)>]
+module TestParallelFixturesScope =
+
+    let defaults = List.init 100 id
+
+    [<TestCaseSource(nameof defaults)>]
+    let ``Default thing`` (i : int) = i |> shouldEqual i

README.md

@@ -8,3 +8,9 @@ To supply special characters in a string, XML-encode them and `"quote"` the stri
 We support at least the [documented `dotnet test` examples](https://learn.microsoft.com/en-us/dotnet/core/testing/selective-unit-tests).
 However, we would recommend phrasing some of them differently, for maximum peace of mind:
 * `FullyQualifiedName=MyNamespace.MyTestsClass<ParameterType1%2CParameterType2>.MyTestMethod`. This would be better phrased with quotes and escaping as `FullyQualifiedName="MyNamespace.MyTestsClass&lt;ParameterType1%2CParameterType2&gt;.MyTestMethod"`
+
+## Parallelism
+
+WoofWare.NUnitTestRunner has *limited* support for parallelism.
+By default, we run tests serially; we may or may not respect the NUnit parallelism attributes to any given extent (but we will never incorrectly run tests in parallel).
+For example, as of this writing, we do not run any tests in parallel (but the internal infrastructure is set up so that we will be able to do this soon).

WoofWare.NUnitTestRunner.Lib/Domain.fs

@@ -31,6 +31,36 @@ type Combinatorial =
     /// each", and so on. Spare slots are filled with `Unchecked.defaultof<_>`.
     | Sequential
 
+/// Describes the level of parallelism permitted in some context.
+[<RequireQualifiedAccess>]
+type ClassParallelScope =
+    /// "I may be run in parallel with other tests, although my children might not be able to run in parallel with each
+    /// other".
+    | Self
+    /// "The set of things I contain may be run in parallel with itself".
+    | Children
+    /// "Fixtures within me may be run in parallel with each other, but the tests within a given fixture might not
+    /// be runnable in parallel with each other".
+    | Fixtures
+    /// "All my descendents are happy to run in parallel with anything else, and also so am I".
+    | All
+
+/// Describes the level of parallelism permitted within an assembly.
+[<RequireQualifiedAccess>]
+type AssemblyParallelScope =
+    /// "The set of things I contain may be run in parallel with itself".
+    | Children
+    /// "Fixtures within me may be run in parallel with each other, but the tests within a given fixture might not
+    /// necessarily be runnable in parallel with each other".
+    | Fixtures
+
+/// Describes whether a test can be run concurrently with other tests.
+type Parallelizable<'scope> =
+    /// This test is happy, under some conditions (specified by the scope), to be run alongside other tests.
+    | Yes of 'scope
+    /// This test must always be run on its own.
+    | No
+
 /// A single method or member which holds some tests. (Often such a member will represent only one test, but e.g.
 /// if it has [<TestCaseSource>] then it represents multiple tests.)
 type SingleTestMethod =
@@ -49,6 +79,8 @@ type SingleTestMethod =
         /// If this test has data supplied by `[<Value>]` annotations, specifies how those annotations are combined
         /// to produce the complete collection of args.
         Combinatorial : Combinatorial option
+        /// If this test has declared a parallelisability, that goes here.
+        Parallelize : Parallelizable<unit> option
     }
 
     /// Human-readable name of this test method.
@@ -85,10 +117,12 @@ type TestFixture =
         Parameters : obj list list
         /// The individual test methods present within this fixture.
         Tests : SingleTestMethod list
+        /// If this fixture has declared a parallelisability, that goes here.
+        Parallelize : Parallelizable<ClassParallelScope> option
     }
 
     /// A test fixture about which we know nothing. No tests, no setup/teardown.
-    static member Empty (ty : Type) (args : obj list list) =
+    static member Empty (ty : Type) (par : Parallelizable<ClassParallelScope> option) (args : obj list list) =
         {
             ContainingAssembly = ty.Assembly
             Type = ty
@@ -99,6 +133,7 @@ type TestFixture =
             TearDown = []
             Parameters = args
             Tests = []
+            Parallelize = par
         }
 
 /// User code in the unit under test has failed somehow.

WoofWare.NUnitTestRunner.Lib/DotnetRuntime.fs

@@ -0,0 +1,104 @@
+namespace WoofWare.NUnitTestRunner
+
+open System
+open System.IO
+open WoofWare.DotnetRuntimeLocator
+
+/// Functions for locating .NET runtimes.
+[<RequireQualifiedAccess>]
+module DotnetRuntime =
+    let private selectRuntime
+        (config : RuntimeOptions)
+        (f : DotnetEnvironmentInfo)
+        : Choice<DotnetEnvironmentFrameworkInfo, DotnetEnvironmentSdkInfo> option
+        =
+        let rollForward =
+            match Environment.GetEnvironmentVariable "DOTNET_ROLL_FORWARD" with
+            | null ->
+                config.RollForward
+                |> Option.map RollForward.Parse
+                |> Option.defaultValue RollForward.Minor
+            | s -> RollForward.Parse s
+
+        let desiredVersions =
+            match config.Framework with
+            | Some f -> [ Version f.Version, f.Name ]
+            | None ->
+
+            match config.Frameworks with
+            | Some f -> f |> List.map (fun f -> Version f.Version, f.Name)
+            | None ->
+                failwith
+                    "Could not deduce a framework version due to lack of either Framework or Frameworks in runtimeconfig"
+
+        let compatiblyNamedRuntimes =
+            f.Frameworks
+            |> Seq.collect (fun availableFramework ->
+                desiredVersions
+                |> List.choose (fun (desiredVersion, desiredName) ->
+                    if desiredName = availableFramework.Name then
+                        Some
+                            {|
+                                Desired = desiredVersion
+                                Name = desiredName
+                                Installed = availableFramework
+                                InstalledVersion = Version availableFramework.Version
+                            |}
+                    else
+                        None
+                )
+            )
+            |> Seq.toList
+
+        match rollForward with
+        | RollForward.Minor ->
+            let available =
+                compatiblyNamedRuntimes
+                |> Seq.filter (fun data ->
+                    data.InstalledVersion.Major = data.Desired.Major
+                    && data.InstalledVersion.Minor >= data.Desired.Minor
+                )
+                |> Seq.groupBy (fun data -> data.Name)
+                |> Seq.map (fun (name, data) ->
+                    let data =
+                        data
+                        |> Seq.minBy (fun data -> data.InstalledVersion.Minor, data.InstalledVersion.Build)
+
+                    name, data.Installed
+                )
+                // TODO: how do we select between many available frameworks?
+                |> Seq.tryHead
+
+            match available with
+            | Some (_, f) -> Some (Choice1Of2 f)
+            | None ->
+                // TODO: maybe we can ask the SDK. But we keep on trucking: maybe we're self-contained,
+                // and we'll actually find all the runtime next to the DLL.
+                None
+        | _ -> failwith "non-minor RollForward not supported yet; please shout if you want it"
+
+    /// Given an executable DLL, locate the .NET runtime that can best run it.
+    let locate (dll : FileInfo) : DirectoryInfo list =
+        let runtimeConfig =
+            let name =
+                if not (dll.Name.EndsWith (".dll", StringComparison.OrdinalIgnoreCase)) then
+                    failwith $"Expected DLL %s{dll.FullName} to end in .dll"
+
+                dll.Name.Substring (0, dll.Name.Length - 4)
+
+            Path.Combine (dll.Directory.FullName, $"%s{name}.runtimeconfig.json")
+            |> File.ReadAllText
+            |> System.Text.Json.Nodes.JsonNode.Parse
+            |> RuntimeConfig.jsonParse
+            |> fun f -> f.RuntimeOptions
+
+        let availableRuntimes = DotnetEnvironmentInfo.Get ()
+
+        let runtime = selectRuntime runtimeConfig availableRuntimes
+
+        match runtime with
+        | None ->
+            // Keep on trucking: let's be optimistic and hope that we're self-contained.
+            [ dll.Directory ]
+        | Some (Choice1Of2 runtime) -> [ dll.Directory ; DirectoryInfo $"%s{runtime.Path}/%s{runtime.Version}" ]
+        | Some (Choice2Of2 sdk) -> [ dll.Directory ; DirectoryInfo sdk.Path ]

WoofWare.NUnitTestRunner.Lib/RuntimeConfig.fs

@@ -4,14 +4,14 @@ open System
 open WoofWare.Myriad.Plugins
 
 [<JsonParse>]
-type FrameworkDescription =
+type internal FrameworkDescription =
     {
         Name : string
         Version : string
     }
 
 [<JsonParse>]
-type RuntimeOptions =
+type internal RuntimeOptions =
     {
         Tfm : string
         Framework : FrameworkDescription option
@@ -20,13 +20,13 @@ type RuntimeOptions =
     }
 
 [<JsonParse>]
-type RuntimeConfig =
+type internal RuntimeConfig =
     {
         RuntimeOptions : RuntimeOptions
     }
 
 [<RequireQualifiedAccess>]
-type RollForward =
+type internal RollForward =
     | Minor
     | Major
     | LatestPatch

WoofWare.NUnitTestRunner.Lib/SingleTestMethod.fs

@@ -18,15 +18,15 @@ module SingleTestMethod =
         (attrs : CustomAttributeData list)
         : SingleTestMethod option * CustomAttributeData list
         =
-        let remaining, isTest, sources, hasData, modifiers, categories, repeat, comb =
+        let remaining, isTest, sources, hasData, modifiers, categories, repeat, comb, par =
-            (([], false, [], None, [], [], None, None), attrs)
+            (([], false, [], None, [], [], None, None, None), attrs)
-            ||> List.fold (fun (remaining, isTest, sources, hasData, mods, cats, repeat, comb) attr ->
+            ||> List.fold (fun (remaining, isTest, sources, hasData, mods, cats, repeat, comb, par) attr ->
                 match attr.AttributeType.FullName with
                 | "NUnit.Framework.TestAttribute" ->
                     if attr.ConstructorArguments.Count > 0 then
                         failwith "Unexpectedly got arguments to the Test attribute"
 
-                    (remaining, true, sources, hasData, mods, cats, repeat, comb)
+                    (remaining, true, sources, hasData, mods, cats, repeat, comb, par)
                 | "NUnit.Framework.TestCaseAttribute" ->
                     let args = attr.ConstructorArguments |> Seq.map _.Value |> Seq.toList
 
@@ -40,62 +40,73 @@ module SingleTestMethod =
                         | _ -> args
 
                     match hasData with
-                    | None -> (remaining, isTest, sources, Some [ List.ofSeq args ], mods, cats, repeat, comb)
+                    | None -> (remaining, isTest, sources, Some [ List.ofSeq args ], mods, cats, repeat, comb, par)
                     | Some existing ->
-                        (remaining, isTest, sources, Some ((List.ofSeq args) :: existing), mods, cats, repeat, comb)
+                        let args = (List.ofSeq args) :: existing |> Some
+                        (remaining, isTest, sources, args, mods, cats, repeat, comb, par)
                 | "NUnit.Framework.TestCaseSourceAttribute" ->
                     let arg = attr.ConstructorArguments |> Seq.exactlyOne |> _.Value |> unbox<string>
 
-                    (remaining, isTest, arg :: sources, hasData, mods, cats, repeat, comb)
+                    (remaining, isTest, arg :: sources, hasData, mods, cats, repeat, comb, par)
                 | "NUnit.Framework.ExplicitAttribute" ->
                     let reason =
                         attr.ConstructorArguments
                         |> Seq.tryHead
                         |> Option.map (_.Value >> unbox<string>)
 
-                    (remaining, isTest, sources, hasData, (Modifier.Explicit reason) :: mods, cats, repeat, comb)
+                    (remaining, isTest, sources, hasData, (Modifier.Explicit reason) :: mods, cats, repeat, comb, par)
                 | "NUnit.Framework.IgnoreAttribute" ->
                     let reason =
                         attr.ConstructorArguments
                         |> Seq.tryHead
                         |> Option.map (_.Value >> unbox<string>)
 
-                    (remaining, isTest, sources, hasData, (Modifier.Ignored reason) :: mods, cats, repeat, comb)
+                    (remaining, isTest, sources, hasData, (Modifier.Ignored reason) :: mods, cats, repeat, comb, par)
                 | "NUnit.Framework.CategoryAttribute" ->
                     let category =
                         attr.ConstructorArguments |> Seq.exactlyOne |> _.Value |> unbox<string>
 
-                    (remaining, isTest, sources, hasData, mods, category :: cats, repeat, comb)
+                    (remaining, isTest, sources, hasData, mods, category :: cats, repeat, comb, par)
                 | "NUnit.Framework.RepeatAttribute" ->
                     match repeat with
                     | Some _ -> failwith $"Got RepeatAttribute multiple times on %s{method.Name}"
                     | None ->
 
                     let repeat = attr.ConstructorArguments |> Seq.exactlyOne |> _.Value |> unbox<int>
-                    (remaining, isTest, sources, hasData, mods, cats, Some repeat, comb)
+                    (remaining, isTest, sources, hasData, mods, cats, Some repeat, comb, par)
                 | "NUnit.Framework.CombinatorialAttribute" ->
                     match comb with
                     | Some _ ->
                         failwith $"Got CombinatorialAttribute or SequentialAttribute multiple times on %s{method.Name}"
                     | None ->
-                        (remaining, isTest, sources, hasData, mods, cats, repeat, Some Combinatorial.Combinatorial)
+                        (remaining, isTest, sources, hasData, mods, cats, repeat, Some Combinatorial.Combinatorial, par)
                 | "NUnit.Framework.SequentialAttribute" ->
                     match comb with
                     | Some _ ->
                         failwith $"Got CombinatorialAttribute or SequentialAttribute multiple times on %s{method.Name}"
-                    | None -> (remaining, isTest, sources, hasData, mods, cats, repeat, Some Combinatorial.Sequential)
+                    | None ->
+                        (remaining, isTest, sources, hasData, mods, cats, repeat, Some Combinatorial.Sequential, par)
+                | "NUnit.Framework.NonParallelizableAttribute" ->
+                    match par with
+                    | Some _ -> failwith $"Got a parallelization attribute multiple times on %s{method.Name}"
+                    | None -> (remaining, isTest, sources, hasData, mods, cats, repeat, comb, Some Parallelizable.No)
+                | "NUnit.Framework.ParallelizableAttribute" ->
+                    match par with
+                    | Some _ -> failwith $"Got multiple parallelization attributes on %s{method.Name}"
+                    | None ->
+                        (remaining, isTest, sources, hasData, mods, cats, repeat, comb, Some (Parallelizable.Yes ()))
                 | s when s.StartsWith ("NUnit.Framework", StringComparison.Ordinal) ->
                     failwith $"Unrecognised attribute on function %s{method.Name}: %s{attr.AttributeType.FullName}"
-                | _ -> (attr :: remaining, isTest, sources, hasData, mods, cats, repeat, comb)
+                | _ -> (attr :: remaining, isTest, sources, hasData, mods, cats, repeat, comb, par)
             )
 
         let test =
-            match isTest, sources, hasData, modifiers, categories, repeat, comb with
+            match isTest, sources, hasData, modifiers, categories, repeat, comb, par with
-            | _, _ :: _, Some _, _, _, _, _ ->
+            | _, _ :: _, Some _, _, _, _, _, _ ->
                 failwith
                     $"Test '%s{method.Name}' unexpectedly has both TestData and TestCaseSource; not currently supported"
-            | false, [], None, [], _, _, _ -> None
+            | false, [], None, [], _, _, _, _ -> None
-            | _, _ :: _, None, mods, categories, repeat, comb ->
+            | _, _ :: _, None, mods, categories, repeat, comb, par ->
                 {
                     Kind = TestKind.Source sources
                     Method = method
@@ -103,9 +114,10 @@ module SingleTestMethod =
                     Categories = categories @ parentCategories
                     Repeat = repeat
                     Combinatorial = comb
+                    Parallelize = par
                 }
                 |> Some
-            | _, [], Some data, mods, categories, repeat, comb ->
+            | _, [], Some data, mods, categories, repeat, comb, par ->
                 {
                     Kind = TestKind.Data data
                     Method = method
@@ -113,9 +125,10 @@ module SingleTestMethod =
                     Categories = categories @ parentCategories
                     Repeat = repeat
                     Combinatorial = comb
+                    Parallelize = par
                 }
                 |> Some
-            | true, [], None, mods, categories, repeat, comb ->
+            | true, [], None, mods, categories, repeat, comb, par ->
                 {
                     Kind = TestKind.Single
                     Method = method
@@ -123,9 +136,10 @@ module SingleTestMethod =
                     Categories = categories @ parentCategories
                     Repeat = repeat
                     Combinatorial = comb
+                    Parallelize = par
                 }
                 |> Some
-            | false, [], None, _ :: _, _, _, _ ->
+            | false, [], None, _ :: _, _, _, _, _ ->
                 failwith
                     $"Unexpectedly got test modifiers but no test settings on '%s{method.Name}', which you probably didn't intend."
 

WoofWare.NUnitTestRunner.Lib/SurfaceBaseline.txt

@@ -1,3 +1,41 @@
+WoofWare.NUnitTestRunner.AssemblyParallelScope inherit obj, implements WoofWare.NUnitTestRunner.AssemblyParallelScope System.IEquatable, System.Collections.IStructuralEquatable, WoofWare.NUnitTestRunner.AssemblyParallelScope System.IComparable, System.IComparable, System.Collections.IStructuralComparable - union type with 2 cases
+WoofWare.NUnitTestRunner.AssemblyParallelScope+Tags inherit obj
+WoofWare.NUnitTestRunner.AssemblyParallelScope+Tags.Children [static field]: int = 0
+WoofWare.NUnitTestRunner.AssemblyParallelScope+Tags.Fixtures [static field]: int = 1
+WoofWare.NUnitTestRunner.AssemblyParallelScope.Children [static property]: [read-only] WoofWare.NUnitTestRunner.AssemblyParallelScope
+WoofWare.NUnitTestRunner.AssemblyParallelScope.Fixtures [static property]: [read-only] WoofWare.NUnitTestRunner.AssemblyParallelScope
+WoofWare.NUnitTestRunner.AssemblyParallelScope.get_Children [static method]: unit -> WoofWare.NUnitTestRunner.AssemblyParallelScope
+WoofWare.NUnitTestRunner.AssemblyParallelScope.get_Fixtures [static method]: unit -> WoofWare.NUnitTestRunner.AssemblyParallelScope
+WoofWare.NUnitTestRunner.AssemblyParallelScope.get_IsChildren [method]: unit -> bool
+WoofWare.NUnitTestRunner.AssemblyParallelScope.get_IsFixtures [method]: unit -> bool
+WoofWare.NUnitTestRunner.AssemblyParallelScope.get_Tag [method]: unit -> int
+WoofWare.NUnitTestRunner.AssemblyParallelScope.IsChildren [property]: [read-only] bool
+WoofWare.NUnitTestRunner.AssemblyParallelScope.IsFixtures [property]: [read-only] bool
+WoofWare.NUnitTestRunner.AssemblyParallelScope.Tag [property]: [read-only] int
+WoofWare.NUnitTestRunner.ClassParallelScope inherit obj, implements WoofWare.NUnitTestRunner.ClassParallelScope System.IEquatable, System.Collections.IStructuralEquatable, WoofWare.NUnitTestRunner.ClassParallelScope System.IComparable, System.IComparable, System.Collections.IStructuralComparable - union type with 4 cases
+WoofWare.NUnitTestRunner.ClassParallelScope+Tags inherit obj
+WoofWare.NUnitTestRunner.ClassParallelScope+Tags.All [static field]: int = 3
+WoofWare.NUnitTestRunner.ClassParallelScope+Tags.Children [static field]: int = 1
+WoofWare.NUnitTestRunner.ClassParallelScope+Tags.Fixtures [static field]: int = 2
+WoofWare.NUnitTestRunner.ClassParallelScope+Tags.Self [static field]: int = 0
+WoofWare.NUnitTestRunner.ClassParallelScope.All [static property]: [read-only] WoofWare.NUnitTestRunner.ClassParallelScope
+WoofWare.NUnitTestRunner.ClassParallelScope.Children [static property]: [read-only] WoofWare.NUnitTestRunner.ClassParallelScope
+WoofWare.NUnitTestRunner.ClassParallelScope.Fixtures [static property]: [read-only] WoofWare.NUnitTestRunner.ClassParallelScope
+WoofWare.NUnitTestRunner.ClassParallelScope.get_All [static method]: unit -> WoofWare.NUnitTestRunner.ClassParallelScope
+WoofWare.NUnitTestRunner.ClassParallelScope.get_Children [static method]: unit -> WoofWare.NUnitTestRunner.ClassParallelScope
+WoofWare.NUnitTestRunner.ClassParallelScope.get_Fixtures [static method]: unit -> WoofWare.NUnitTestRunner.ClassParallelScope
+WoofWare.NUnitTestRunner.ClassParallelScope.get_IsAll [method]: unit -> bool
+WoofWare.NUnitTestRunner.ClassParallelScope.get_IsChildren [method]: unit -> bool
+WoofWare.NUnitTestRunner.ClassParallelScope.get_IsFixtures [method]: unit -> bool
+WoofWare.NUnitTestRunner.ClassParallelScope.get_IsSelf [method]: unit -> bool
+WoofWare.NUnitTestRunner.ClassParallelScope.get_Self [static method]: unit -> WoofWare.NUnitTestRunner.ClassParallelScope
+WoofWare.NUnitTestRunner.ClassParallelScope.get_Tag [method]: unit -> int
+WoofWare.NUnitTestRunner.ClassParallelScope.IsAll [property]: [read-only] bool
+WoofWare.NUnitTestRunner.ClassParallelScope.IsChildren [property]: [read-only] bool
+WoofWare.NUnitTestRunner.ClassParallelScope.IsFixtures [property]: [read-only] bool
+WoofWare.NUnitTestRunner.ClassParallelScope.IsSelf [property]: [read-only] bool
+WoofWare.NUnitTestRunner.ClassParallelScope.Self [static property]: [read-only] WoofWare.NUnitTestRunner.ClassParallelScope
+WoofWare.NUnitTestRunner.ClassParallelScope.Tag [property]: [read-only] int
 WoofWare.NUnitTestRunner.Combinatorial inherit obj, implements WoofWare.NUnitTestRunner.Combinatorial System.IEquatable, System.Collections.IStructuralEquatable, WoofWare.NUnitTestRunner.Combinatorial System.IComparable, System.IComparable, System.Collections.IStructuralComparable - union type with 2 cases
 WoofWare.NUnitTestRunner.Combinatorial+Tags inherit obj
 WoofWare.NUnitTestRunner.Combinatorial+Tags.Combinatorial [static field]: int = 0
@@ -12,6 +50,8 @@ WoofWare.NUnitTestRunner.Combinatorial.IsCombinatorial [property]: [read-only] b
 WoofWare.NUnitTestRunner.Combinatorial.IsSequential [property]: [read-only] bool
 WoofWare.NUnitTestRunner.Combinatorial.Sequential [static property]: [read-only] WoofWare.NUnitTestRunner.Combinatorial
 WoofWare.NUnitTestRunner.Combinatorial.Tag [property]: [read-only] int
+WoofWare.NUnitTestRunner.DotnetRuntime inherit obj
+WoofWare.NUnitTestRunner.DotnetRuntime.locate [static method]: System.IO.FileInfo -> System.IO.DirectoryInfo list
 WoofWare.NUnitTestRunner.Filter inherit obj, implements WoofWare.NUnitTestRunner.Filter System.IEquatable, System.Collections.IStructuralEquatable, WoofWare.NUnitTestRunner.Filter System.IComparable, System.IComparable, System.Collections.IStructuralComparable - union type with 6 cases
 WoofWare.NUnitTestRunner.Filter+And inherit WoofWare.NUnitTestRunner.Filter
 WoofWare.NUnitTestRunner.Filter+And.get_Item1 [method]: unit -> WoofWare.NUnitTestRunner.Filter
@@ -139,8 +179,24 @@ WoofWare.NUnitTestRunner.Modifier.IsIgnored [property]: [read-only] bool
 WoofWare.NUnitTestRunner.Modifier.NewExplicit [static method]: string option -> WoofWare.NUnitTestRunner.Modifier
 WoofWare.NUnitTestRunner.Modifier.NewIgnored [static method]: string option -> WoofWare.NUnitTestRunner.Modifier
 WoofWare.NUnitTestRunner.Modifier.Tag [property]: [read-only] int
+WoofWare.NUnitTestRunner.Parallelizable`1 inherit obj, implements 'scope WoofWare.NUnitTestRunner.Parallelizable System.IEquatable, System.Collections.IStructuralEquatable, 'scope WoofWare.NUnitTestRunner.Parallelizable System.IComparable, System.IComparable, System.Collections.IStructuralComparable - union type with 2 cases
+WoofWare.NUnitTestRunner.Parallelizable`1+Tags inherit obj
+WoofWare.NUnitTestRunner.Parallelizable`1+Tags.No [static field]: int = 1
+WoofWare.NUnitTestRunner.Parallelizable`1+Tags.Yes [static field]: int = 0
+WoofWare.NUnitTestRunner.Parallelizable`1+Yes inherit 'scope WoofWare.NUnitTestRunner.Parallelizable
+WoofWare.NUnitTestRunner.Parallelizable`1+Yes.get_Item [method]: unit -> 'scope
+WoofWare.NUnitTestRunner.Parallelizable`1+Yes.Item [property]: [read-only] 'scope
+WoofWare.NUnitTestRunner.Parallelizable`1.get_IsNo [method]: unit -> bool
+WoofWare.NUnitTestRunner.Parallelizable`1.get_IsYes [method]: unit -> bool
+WoofWare.NUnitTestRunner.Parallelizable`1.get_No [static method]: unit -> 'scope WoofWare.NUnitTestRunner.Parallelizable
+WoofWare.NUnitTestRunner.Parallelizable`1.get_Tag [method]: unit -> int
+WoofWare.NUnitTestRunner.Parallelizable`1.IsNo [property]: [read-only] bool
+WoofWare.NUnitTestRunner.Parallelizable`1.IsYes [property]: [read-only] bool
+WoofWare.NUnitTestRunner.Parallelizable`1.NewYes [static method]: 'scope -> 'scope WoofWare.NUnitTestRunner.Parallelizable
+WoofWare.NUnitTestRunner.Parallelizable`1.No [static property]: [read-only] 'scope WoofWare.NUnitTestRunner.Parallelizable
+WoofWare.NUnitTestRunner.Parallelizable`1.Tag [property]: [read-only] int
 WoofWare.NUnitTestRunner.SingleTestMethod inherit obj, implements WoofWare.NUnitTestRunner.SingleTestMethod System.IEquatable, System.Collections.IStructuralEquatable
-WoofWare.NUnitTestRunner.SingleTestMethod..ctor [constructor]: (System.Reflection.MethodInfo, WoofWare.NUnitTestRunner.TestKind, WoofWare.NUnitTestRunner.Modifier list, string list, int option, WoofWare.NUnitTestRunner.Combinatorial option)
+WoofWare.NUnitTestRunner.SingleTestMethod..ctor [constructor]: (System.Reflection.MethodInfo, WoofWare.NUnitTestRunner.TestKind, WoofWare.NUnitTestRunner.Modifier list, string list, int option, WoofWare.NUnitTestRunner.Combinatorial option, unit WoofWare.NUnitTestRunner.Parallelizable option)
 WoofWare.NUnitTestRunner.SingleTestMethod.Categories [property]: [read-only] string list
 WoofWare.NUnitTestRunner.SingleTestMethod.Combinatorial [property]: [read-only] WoofWare.NUnitTestRunner.Combinatorial option
 WoofWare.NUnitTestRunner.SingleTestMethod.get_Categories [method]: unit -> string list
@@ -149,11 +205,13 @@ WoofWare.NUnitTestRunner.SingleTestMethod.get_Kind [method]: unit -> WoofWare.NU
 WoofWare.NUnitTestRunner.SingleTestMethod.get_Method [method]: unit -> System.Reflection.MethodInfo
 WoofWare.NUnitTestRunner.SingleTestMethod.get_Modifiers [method]: unit -> WoofWare.NUnitTestRunner.Modifier list
 WoofWare.NUnitTestRunner.SingleTestMethod.get_Name [method]: unit -> string
+WoofWare.NUnitTestRunner.SingleTestMethod.get_Parallelize [method]: unit -> unit WoofWare.NUnitTestRunner.Parallelizable option
 WoofWare.NUnitTestRunner.SingleTestMethod.get_Repeat [method]: unit -> int option
 WoofWare.NUnitTestRunner.SingleTestMethod.Kind [property]: [read-only] WoofWare.NUnitTestRunner.TestKind
 WoofWare.NUnitTestRunner.SingleTestMethod.Method [property]: [read-only] System.Reflection.MethodInfo
 WoofWare.NUnitTestRunner.SingleTestMethod.Modifiers [property]: [read-only] WoofWare.NUnitTestRunner.Modifier list
 WoofWare.NUnitTestRunner.SingleTestMethod.Name [property]: [read-only] string
+WoofWare.NUnitTestRunner.SingleTestMethod.Parallelize [property]: [read-only] unit WoofWare.NUnitTestRunner.Parallelizable option
 WoofWare.NUnitTestRunner.SingleTestMethod.Repeat [property]: [read-only] int option
 WoofWare.NUnitTestRunner.SingleTestMethodModule inherit obj
 WoofWare.NUnitTestRunner.SingleTestMethodModule.parse [static method]: string list -> System.Reflection.MethodInfo -> System.Reflection.CustomAttributeData list -> (WoofWare.NUnitTestRunner.SingleTestMethod option * System.Reflection.CustomAttributeData list)
@@ -185,13 +243,14 @@ WoofWare.NUnitTestRunner.TestFailure.NewTearDownFailed [static method]: WoofWare
 WoofWare.NUnitTestRunner.TestFailure.NewTestFailed [static method]: WoofWare.NUnitTestRunner.UserMethodFailure -> WoofWare.NUnitTestRunner.TestFailure
 WoofWare.NUnitTestRunner.TestFailure.Tag [property]: [read-only] int
 WoofWare.NUnitTestRunner.TestFixture inherit obj, implements WoofWare.NUnitTestRunner.TestFixture System.IEquatable, System.Collections.IStructuralEquatable
-WoofWare.NUnitTestRunner.TestFixture..ctor [constructor]: (System.Reflection.Assembly, string, System.Type, System.Reflection.MethodInfo option, System.Reflection.MethodInfo option, System.Reflection.MethodInfo list, System.Reflection.MethodInfo list, obj list list, WoofWare.NUnitTestRunner.SingleTestMethod list)
+WoofWare.NUnitTestRunner.TestFixture..ctor [constructor]: (System.Reflection.Assembly, string, System.Type, System.Reflection.MethodInfo option, System.Reflection.MethodInfo option, System.Reflection.MethodInfo list, System.Reflection.MethodInfo list, obj list list, WoofWare.NUnitTestRunner.SingleTestMethod list, WoofWare.NUnitTestRunner.ClassParallelScope WoofWare.NUnitTestRunner.Parallelizable option)
 WoofWare.NUnitTestRunner.TestFixture.ContainingAssembly [property]: [read-only] System.Reflection.Assembly
-WoofWare.NUnitTestRunner.TestFixture.Empty [static method]: System.Type -> obj list list -> WoofWare.NUnitTestRunner.TestFixture
+WoofWare.NUnitTestRunner.TestFixture.Empty [static method]: System.Type -> WoofWare.NUnitTestRunner.ClassParallelScope WoofWare.NUnitTestRunner.Parallelizable option -> obj list list -> WoofWare.NUnitTestRunner.TestFixture
 WoofWare.NUnitTestRunner.TestFixture.get_ContainingAssembly [method]: unit -> System.Reflection.Assembly
 WoofWare.NUnitTestRunner.TestFixture.get_Name [method]: unit -> string
 WoofWare.NUnitTestRunner.TestFixture.get_OneTimeSetUp [method]: unit -> System.Reflection.MethodInfo option
 WoofWare.NUnitTestRunner.TestFixture.get_OneTimeTearDown [method]: unit -> System.Reflection.MethodInfo option
+WoofWare.NUnitTestRunner.TestFixture.get_Parallelize [method]: unit -> WoofWare.NUnitTestRunner.ClassParallelScope WoofWare.NUnitTestRunner.Parallelizable option
 WoofWare.NUnitTestRunner.TestFixture.get_Parameters [method]: unit -> obj list list
 WoofWare.NUnitTestRunner.TestFixture.get_SetUp [method]: unit -> System.Reflection.MethodInfo list
 WoofWare.NUnitTestRunner.TestFixture.get_TearDown [method]: unit -> System.Reflection.MethodInfo list
@@ -200,6 +259,7 @@ WoofWare.NUnitTestRunner.TestFixture.get_Type [method]: unit -> System.Type
 WoofWare.NUnitTestRunner.TestFixture.Name [property]: [read-only] string
 WoofWare.NUnitTestRunner.TestFixture.OneTimeSetUp [property]: [read-only] System.Reflection.MethodInfo option
 WoofWare.NUnitTestRunner.TestFixture.OneTimeTearDown [property]: [read-only] System.Reflection.MethodInfo option
+WoofWare.NUnitTestRunner.TestFixture.Parallelize [property]: [read-only] WoofWare.NUnitTestRunner.ClassParallelScope WoofWare.NUnitTestRunner.Parallelizable option
 WoofWare.NUnitTestRunner.TestFixture.Parameters [property]: [read-only] obj list list
 WoofWare.NUnitTestRunner.TestFixture.SetUp [property]: [read-only] System.Reflection.MethodInfo list
 WoofWare.NUnitTestRunner.TestFixture.TearDown [property]: [read-only] System.Reflection.MethodInfo list
@@ -356,10 +416,12 @@ WoofWare.NUnitTestRunner.TrxOutcome.Parse [static method]: string -> WoofWare.NU
 WoofWare.NUnitTestRunner.TrxOutcome.Tag [property]: [read-only] int
 WoofWare.NUnitTestRunner.TrxOutcome.Warning [static property]: [read-only] WoofWare.NUnitTestRunner.TrxOutcome
 WoofWare.NUnitTestRunner.TrxOutput inherit obj, implements WoofWare.NUnitTestRunner.TrxOutput System.IEquatable, System.Collections.IStructuralEquatable
-WoofWare.NUnitTestRunner.TrxOutput..ctor [constructor]: (string option, WoofWare.NUnitTestRunner.TrxErrorInfo option)
+WoofWare.NUnitTestRunner.TrxOutput..ctor [constructor]: (string option, string option, WoofWare.NUnitTestRunner.TrxErrorInfo option)
 WoofWare.NUnitTestRunner.TrxOutput.ErrorInfo [property]: [read-only] WoofWare.NUnitTestRunner.TrxErrorInfo option
 WoofWare.NUnitTestRunner.TrxOutput.get_ErrorInfo [method]: unit -> WoofWare.NUnitTestRunner.TrxErrorInfo option
+WoofWare.NUnitTestRunner.TrxOutput.get_StdErr [method]: unit -> string option
 WoofWare.NUnitTestRunner.TrxOutput.get_StdOut [method]: unit -> string option
+WoofWare.NUnitTestRunner.TrxOutput.StdErr [property]: [read-only] string option
 WoofWare.NUnitTestRunner.TrxOutput.StdOut [property]: [read-only] string option
 WoofWare.NUnitTestRunner.TrxReport inherit obj, implements WoofWare.NUnitTestRunner.TrxReport System.IEquatable, System.Collections.IStructuralEquatable
 WoofWare.NUnitTestRunner.TrxReport..ctor [constructor]: (System.Guid, string, WoofWare.NUnitTestRunner.TrxReportTimes, WoofWare.NUnitTestRunner.TrxTestSettings, WoofWare.NUnitTestRunner.TrxUnitTestResult list, WoofWare.NUnitTestRunner.TrxUnitTest list, WoofWare.NUnitTestRunner.TrxTestEntry list, WoofWare.NUnitTestRunner.TrxTestListEntry list, WoofWare.NUnitTestRunner.TrxResultsSummary)
@@ -532,4 +594,4 @@ WoofWare.NUnitTestRunner.UserMethodFailure.IsThrew [property]: [read-only] bool
 WoofWare.NUnitTestRunner.UserMethodFailure.Name [property]: [read-only] string
 WoofWare.NUnitTestRunner.UserMethodFailure.NewReturnedNonUnit [static method]: (string, obj) -> WoofWare.NUnitTestRunner.UserMethodFailure
 WoofWare.NUnitTestRunner.UserMethodFailure.NewThrew [static method]: (string, System.Exception) -> WoofWare.NUnitTestRunner.UserMethodFailure
-WoofWare.NUnitTestRunner.UserMethodFailure.Tag [property]: [read-only] int
+WoofWare.NUnitTestRunner.UserMethodFailure.Tag [property]: [read-only] int

WoofWare.NUnitTestRunner.Lib/TestFixture.fs

@@ -520,15 +520,15 @@ module TestFixture =
     /// Interpret this type as a [<TestFixture>], extracting the test members from it and annotating them with all
     /// relevant information about how we should run them.
     let parse (parentType : Type) : TestFixture =
-        let categories, args =
+        let categories, args, par =
-            (([], []), parentType.CustomAttributes)
+            (([], [], None), parentType.CustomAttributes)
-            ||> Seq.fold (fun (categories, args) attr ->
+            ||> Seq.fold (fun (categories, args, par) attr ->
                 match attr.AttributeType.FullName with
                 | "NUnit.Framework.SetUpFixtureAttribute" ->
                     failwith "This test runner does not support SetUpFixture. Please shout if you want this."
                 | "NUnit.Framework.CategoryAttribute" ->
                     let cat = attr.ConstructorArguments |> Seq.exactlyOne |> _.Value |> unbox<string>
-                    cat :: categories, args
+                    cat :: categories, args, par
                 | "NUnit.Framework.TestFixtureAttribute" ->
                     let newArgs =
                         match attr.ConstructorArguments |> Seq.map _.Value |> Seq.toList with
@@ -536,11 +536,36 @@ module TestFixture =
                             x |> Seq.cast<CustomAttributeTypedArgument> |> Seq.map _.Value |> Seq.toList
                         | xs -> xs
 
-                    categories, newArgs :: args
+                    categories, newArgs :: args, par
-                | _ -> categories, args
+                | "NUnit.Framework.NonParallelizableAttribute" ->
+                    match par with
+                    | Some _ -> failwith $"Got multiple parallelism attributes on %s{parentType.FullName}"
+                    | None -> categories, args, Some Parallelizable.No
+                | "NUnit.Framework.ParallelizableAttribute" ->
+                    match par with
+                    | Some _ -> failwith $"Got multiple parallelism attributes on %s{parentType.FullName}"
+                    | None ->
+                        match attr.ConstructorArguments |> Seq.toList with
+                        | [] -> categories, args, Some (Parallelizable.Yes ClassParallelScope.Self)
+                        | [ v ] ->
+                            match v.Value with
+                            | :? int as v ->
+                                match v with
+                                | 512 -> categories, args, Some (Parallelizable.Yes ClassParallelScope.Fixtures)
+                                | 256 -> categories, args, Some (Parallelizable.Yes ClassParallelScope.Children)
+                                | 257 -> categories, args, Some (Parallelizable.Yes ClassParallelScope.All)
+                                | 1 -> categories, args, Some (Parallelizable.Yes ClassParallelScope.Self)
+                                | v ->
+                                    failwith
+                                        $"Could not recognise value %i{v} of parallel scope in %s{parentType.FullName}"
+                            | v ->
+                                failwith
+                                    $"Unexpectedly non-int value %O{v} of parallel scope in %s{parentType.FullName}"
+                        | _ -> failwith $"unexpectedly got multiple args to Parallelizable on %s{parentType.FullName}"
+                | _ -> categories, args, par
             )
 
-        (TestFixture.Empty parentType args, parentType.GetRuntimeMethods ())
+        (TestFixture.Empty parentType par args, parentType.GetRuntimeMethods ())
         ||> Seq.fold (fun state mi ->
             ((state, []), mi.CustomAttributes)
             ||> Seq.fold (fun (state, unrecognisedAttrs) attr ->

WoofWare.NUnitTestRunner.Lib/TrxReport.fs

@@ -290,6 +290,8 @@ type TrxOutput =
     {
         /// What the entity printed to standard output.
         StdOut : string option
+        /// What the entity printed to standard error.
+        StdErr : string option
         /// Description of any error the entity encountered.
         ErrorInfo : TrxErrorInfo option
     }
@@ -305,6 +307,14 @@ type TrxOutput =
             childNode.AppendChild text |> ignore<XmlNode>
             node.AppendChild childNode |> ignore<XmlNode>
 
+        match this.StdErr with
+        | None -> ()
+        | Some stderr ->
+            let text = doc.CreateTextNode stderr
+            let childNode = doc.CreateElement ("StdErr", XmlUtil.NS)
+            childNode.AppendChild text |> ignore<XmlNode>
+            node.AppendChild childNode |> ignore<XmlNode>
+
         match this.ErrorInfo with
         | None -> ()
         | Some errInfo -> node.AppendChild (errInfo.toXml doc) |> ignore<XmlNode>
@@ -317,6 +327,11 @@ type TrxOutput =
             | NodeWithNamedChild "StdOut" (OneChildNode "StdOut" (NoChildrenNode stdout)) -> Some stdout
             | _ -> None
 
+        let stderr =
+            match node with
+            | NodeWithNamedChild "StdErr" (OneChildNode "StdErr" (NoChildrenNode stdout)) -> Some stdout
+            | _ -> None
+
         let errorInfo =
             match node with
             | NodeWithNamedChild "ErrorInfo" node ->
@@ -330,6 +345,7 @@ type TrxOutput =
         | Ok errorInfo ->
             {
                 StdOut = stdout
+                StdErr = stderr
                 ErrorInfo = errorInfo
             }
             |> Ok

WoofWare.NUnitTestRunner.Lib/WoofWare.NUnitTestRunner.Lib.fsproj

@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
 
     <PropertyGroup>
-      <TargetFramework>netstandard2.1</TargetFramework>
+      <TargetFramework>net6.0</TargetFramework>
       <GenerateDocumentationFile>true</GenerateDocumentationFile>
       <Authors>Patrick Stevens</Authors>
       <Copyright>Copyright (c) Patrick Stevens 2024</Copyright>
@@ -14,10 +14,16 @@
       <PackageId>WoofWare.NUnitTestRunner.Lib</PackageId>
       <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
       <WarnOn>FS3559</WarnOn>
+      <WoofWareMyriadPluginVersion>2.1.44</WoofWareMyriadPluginVersion>
     </PropertyGroup>
 
     <ItemGroup>
       <Compile Include="AssemblyInfo.fs" />
+      <Compile Include="RuntimeConfig.fs" />
+      <Compile Include="GeneratedRuntimeConfig.fs">
+        <MyriadFile>RuntimeConfig.fs</MyriadFile>
+      </Compile>
+      <Compile Include="DotnetRuntime.fs" />
       <Compile Include="Array.fs" />
       <Compile Include="List.fs" />
       <Compile Include="Result.fs" />
@@ -38,6 +44,14 @@
   <ItemGroup>
     <PackageReference Include="WoofWare.PrattParser" Version="0.1.2" />
     <PackageReference Update="FSharp.Core" Version="6.0.0" />
+    <PackageReference Include="WoofWare.DotnetRuntimeLocator" Version="0.1.4" />
+    <PackageReference Include="WoofWare.Myriad.Plugins.Attributes" Version="3.1.6" />
+    <PackageReference Include="Myriad.SDK" Version="0.8.3" />
+    <PackageReference Include="WoofWare.Myriad.Plugins" Version="$(WoofWareMyriadPluginVersion)" PrivateAssets="all" />
+  </ItemGroup>
+  
+  <ItemGroup>
+    <MyriadSdkGenerator Include="$(NuGetPackageRoot)/woofware.myriad.plugins/$(WoofWareMyriadPluginVersion)/lib/net6.0/WoofWare.Myriad.Plugins.dll" />
   </ItemGroup>
 
 </Project>

WoofWare.NUnitTestRunner.Lib/version.json

@@ -1,5 +1,5 @@
 {
-  "version": "0.9",
+  "version": "0.12",
   "publicReleaseRefSpec": [
     "^refs/heads/main$"
   ],

WoofWare.NUnitTestRunner/Program.fs

@@ -1,7 +1,6 @@
 namespace WoofWare.NUnitTestRunner
 
 open System
-open WoofWare.DotnetRuntimeLocator
 open System.IO
 open System.Reflection
 open System.Runtime.Loader
@@ -41,101 +40,6 @@ type Ctx (dll : FileInfo, runtimes : DirectoryInfo list) =
 
 
 module Program =
-    let selectRuntime
-        (config : RuntimeOptions)
-        (f : DotnetEnvironmentInfo)
-        : Choice<DotnetEnvironmentFrameworkInfo, DotnetEnvironmentSdkInfo> option
-        =
-        let rollForward =
-            match Environment.GetEnvironmentVariable "DOTNET_ROLL_FORWARD" with
-            | null ->
-                config.RollForward
-                |> Option.map RollForward.Parse
-                |> Option.defaultValue RollForward.Minor
-            | s -> RollForward.Parse s
-
-        let desiredVersions =
-            match config.Framework with
-            | Some f -> [ Version f.Version, f.Name ]
-            | None ->
-
-            match config.Frameworks with
-            | Some f -> f |> List.map (fun f -> Version f.Version, f.Name)
-            | None ->
-                failwith
-                    "Could not deduce a framework version due to lack of either Framework or Frameworks in runtimeconfig"
-
-        let compatiblyNamedRuntimes =
-            f.Frameworks
-            |> Seq.collect (fun availableFramework ->
-                desiredVersions
-                |> List.choose (fun (desiredVersion, desiredName) ->
-                    if desiredName = availableFramework.Name then
-                        Some
-                            {|
-                                Desired = desiredVersion
-                                Name = desiredName
-                                Installed = availableFramework
-                                InstalledVersion = Version availableFramework.Version
-                            |}
-                    else
-                        None
-                )
-            )
-            |> Seq.toList
-
-        match rollForward with
-        | RollForward.Minor ->
-            let available =
-                compatiblyNamedRuntimes
-                |> Seq.filter (fun data ->
-                    data.InstalledVersion.Major = data.Desired.Major
-                    && data.InstalledVersion.Minor >= data.Desired.Minor
-                )
-                |> Seq.groupBy (fun data -> data.Name)
-                |> Seq.map (fun (name, data) ->
-                    let data =
-                        data
-                        |> Seq.minBy (fun data -> data.InstalledVersion.Minor, data.InstalledVersion.Build)
-
-                    name, data.Installed
-                )
-                // TODO: how do we select between many available frameworks?
-                |> Seq.tryHead
-
-            match available with
-            | Some (_, f) -> Some (Choice1Of2 f)
-            | None ->
-                // TODO: maybe we can ask the SDK. But we keep on trucking: maybe we're self-contained,
-                // and we'll actually find all the runtime next to the DLL.
-                None
-        | _ -> failwith "non-minor RollForward not supported yet; please shout if you want it"
-
-    let locateRuntimes (dll : FileInfo) : DirectoryInfo list =
-        let runtimeConfig =
-            let name =
-                if not (dll.Name.EndsWith (".dll", StringComparison.OrdinalIgnoreCase)) then
-                    failwith $"Expected DLL %s{dll.FullName} to end in .dll"
-
-                dll.Name.Substring (0, dll.Name.Length - 4)
-
-            Path.Combine (dll.Directory.FullName, $"%s{name}.runtimeconfig.json")
-            |> File.ReadAllText
-            |> System.Text.Json.Nodes.JsonNode.Parse
-            |> RuntimeConfig.jsonParse
-            |> fun f -> f.RuntimeOptions
-
-        let availableRuntimes = DotnetEnvironmentInfo.Get ()
-
-        let runtime = selectRuntime runtimeConfig availableRuntimes
-
-        match runtime with
-        | None ->
-            // Keep on trucking: let's be optimistic and hope that we're self-contained.
-            [ dll.Directory ]
-        | Some (Choice1Of2 runtime) -> [ dll.Directory ; DirectoryInfo $"%s{runtime.Path}/%s{runtime.Version}" ]
-        | Some (Choice2Of2 sdk) -> [ dll.Directory ; DirectoryInfo sdk.Path ]
-
     let main argv =
         let startTime = DateTimeOffset.Now
 
@@ -161,9 +65,48 @@ module Program =
 
         use _ = new SetBaseDir (testDll)
 
-        let ctx = Ctx (testDll, locateRuntimes testDll)
+        let ctx = Ctx (testDll, DotnetRuntime.locate testDll)
         let assy = ctx.LoadFromAssemblyPath testDll.FullName
 
+        let levelOfParallelism, par =
+            ((None, None), assy.CustomAttributes)
+            ||> Seq.fold (fun (levelPar, par) attr ->
+                match attr.AttributeType.FullName with
+                | "NUnit.Framework.LevelOfParallelismAttribute" ->
+                    let arg = attr.ConstructorArguments |> Seq.exactlyOne |> _.Value |> unbox<int>
+
+                    match levelPar with
+                    | None -> (Some arg, par)
+                    | Some existing ->
+                        failwith $"Assembly %s{assy.Location} declares parallelism %i{arg} and also %i{existing}"
+                | "NUnit.Framework.NonParallelizableAttribute" ->
+                    match levelPar with
+                    | None -> (Some 1, par)
+                    | Some existing ->
+                        failwith
+                            $"Assembly %s{assy.Location} declares non-parallelizable and also parallelism %i{existing}"
+                | "NUnit.Framework.ParallelizableAttribute" ->
+                    match par with
+                    | Some _ -> failwith "Got multiple Parallelize attributes in assembly"
+                    | None ->
+                        match attr.ConstructorArguments |> Seq.toList with
+                        | [] -> levelPar, Some (Parallelizable.Yes AssemblyParallelScope.Fixtures)
+                        | [ v ] ->
+                            match v.Value with
+                            | :? int as v ->
+                                match v with
+                                | 512 -> levelPar, Some (Parallelizable.Yes AssemblyParallelScope.Fixtures)
+                                | 256 -> levelPar, Some (Parallelizable.Yes AssemblyParallelScope.Children)
+                                | 257 ->
+                                    failwith "ParallelScope.All is invalid on assemblies; only Fixtures or Children"
+                                | 1 ->
+                                    failwith "ParallelScope.Self is invalid on assemblies; only Fixtures or Children"
+                                | v -> failwith $"Could not recognise value %i{v} of parallel scope on assembly"
+                            | v -> failwith $"Unexpectedly non-int value %O{v} of parallel scope on assembly"
+                        | _ -> failwith "unexpectedly got multiple args to Parallelizable on assembly"
+                | _ -> levelPar, par
+            )
+
         let testFixtures = assy.ExportedTypes |> Seq.map TestFixture.parse |> Seq.toList
 
         let creationTime = DateTimeOffset.Now
@@ -270,6 +213,7 @@ module Program =
                 Output =
                     {
                         StdOut = None
+                        StdErr = None
                         ErrorInfo = None
                     }
                 RunInfos =
@@ -373,11 +317,11 @@ module Program =
                     Output =
                         match i.StdOut, i.StdErr, exc with
                         | None, None, None -> None
-                        // TODO surely stderr can be emitted
+                        | stdout, stderr, exc ->
-                        | stdout, _stderr, exc ->
                             Some
                                 {
                                     TrxOutput.StdOut = stdout
+                                    StdErr = stderr
                                     ErrorInfo = exc
                                 }
                 }

WoofWare.NUnitTestRunner/WoofWare.NUnitTestRunner.Test/TestList.fs

@@ -11,6 +11,8 @@ module TestList =
     [<Test>]
     let ``combinations has right size`` () =
         let property (xs : int list list) =
+            let xs = if xs.Length > 6 then xs |> List.take 6 else xs
+            let xs = xs |> List.map (fun xs -> if xs.Length > 6 then xs |> List.take 6 else xs)
             let combs = List.combinations xs
 
             combs.Length

WoofWare.NUnitTestRunner/WoofWare.NUnitTestRunner.Test/TestTrx.fs

@@ -197,6 +197,7 @@ Running all tests in /Users/patrick/Documents/GitHub/TestRunner/TestRunner/TestR
 Ensure version is monotonic: Not yet published
 NUnit Adapter 4.5.0.0: Test execution complete
 """
+                        StdErr = None
                         ErrorInfo = None
                     }
                 Outcome = TrxOutcome.Failed

WoofWare.NUnitTestRunner/WoofWare.NUnitTestRunner.fsproj

@@ -16,14 +16,9 @@
     <PackageId>WoofWare.NUnitTestRunner</PackageId>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
     <WarnOn>FS3559</WarnOn>
-    <WoofWareMyriadPluginVersion>2.1.42</WoofWareMyriadPluginVersion>
   </PropertyGroup>
 
   <ItemGroup>
-    <Compile Include="RuntimeConfig.fs" />
-    <Compile Include="GeneratedRuntimeConfig.fs">
-      <MyriadFile>RuntimeConfig.fs</MyriadFile>
-    </Compile>
     <Compile Include="Seq.fs" />
     <Compile Include="Progress.fs" />
     <Compile Include="Program.fs" />
@@ -39,14 +34,6 @@
 
   <ItemGroup>
     <PackageReference Include="Spectre.Console" Version="0.49.1" />
-    <PackageReference Include="WoofWare.DotnetRuntimeLocator" Version="0.1.4" />
-    <PackageReference Include="WoofWare.Myriad.Plugins.Attributes" Version="3.1.6" />
-    <PackageReference Include="Myriad.SDK" Version="0.8.3" />
-    <PackageReference Include="WoofWare.Myriad.Plugins" Version="$(WoofWareMyriadPluginVersion)" PrivateAssets="all" />
-  </ItemGroup>
-
-  <ItemGroup>
-    <MyriadSdkGenerator Include="$(NuGetPackageRoot)/woofware.myriad.plugins/$(WoofWareMyriadPluginVersion)/lib/net6.0/WoofWare.Myriad.Plugins.dll" />
   </ItemGroup>
 
   <ItemGroup>

WoofWare.NUnitTestRunner/version.json

@@ -5,6 +5,7 @@
   ],
   "pathFilters": [
     "./",
+    "^./WoofWare.NUnitTestRunner.Test",
     ":/WoofWare.NUnitTestRunner.Lib",
     ":/Directory.Build.props",
     ":/README.md"

nix/deps.nix

@@ -36,6 +36,31 @@
     version = "6.0.0";
     sha256 = "18q3p0z155znwj1l0qq3vq9nh9wl2i4mlfx4pmrnia4czr0xdkmb";
   })
+  (fetchNuGet {
+    pname = "Microsoft.AspNetCore.App.Ref";
+    version = "6.0.30";
+    sha256 = "17k3l8xd5bsyk69bm5q4nxbpb4i0izw1kzmzi7j3p8pmm9prgrpy";
+  })
+  (fetchNuGet {
+    pname = "Microsoft.AspNetCore.App.Runtime.linux-arm64";
+    version = "6.0.30";
+    sha256 = "1n4v5przbrjhzj01b6qijpdc2jbsxr66ijvd0483qxh4s0b4jppr";
+  })
+  (fetchNuGet {
+    pname = "Microsoft.AspNetCore.App.Runtime.linux-x64";
+    version = "6.0.30";
+    sha256 = "18v0l07q74m5xxaf6y6dkmr6and8ivya0nslffnr4djrxcbiygdr";
+  })
+  (fetchNuGet {
+    pname = "Microsoft.AspNetCore.App.Runtime.osx-arm64";
+    version = "6.0.30";
+    sha256 = "0p53lyqmr5n2ym202pbgmsd9b9aa6jar7ic04dcq86h2g77r5jqk";
+  })
+  (fetchNuGet {
+    pname = "Microsoft.AspNetCore.App.Runtime.osx-x64";
+    version = "6.0.30";
+    sha256 = "009srl8vazkjnd93xr6k1m353spbki9gn1yzp4zgazgbrini6rqc";
+  })
   (fetchNuGet {
     pname = "Microsoft.CodeCoverage";
     version = "17.10.0";
@@ -46,6 +71,51 @@
     version = "17.10.0";
     sha256 = "13g8fwl09li8fc71nk13dgkb7gahd4qhamyg2xby7am63nlchhdf";
   })
+  (fetchNuGet {
+    pname = "Microsoft.NETCore.App.Host.linux-arm64";
+    version = "6.0.30";
+    sha256 = "0l3gjhmnjd5n67w83smqyhmfcwzszafjgcbq8kdwxiwwh2m6nh2i";
+  })
+  (fetchNuGet {
+    pname = "Microsoft.NETCore.App.Host.linux-x64";
+    version = "6.0.30";
+    sha256 = "0ss3108c2h7afypvliyqixv4dll60sq9iwqy90k1p132znpszrmb";
+  })
+  (fetchNuGet {
+    pname = "Microsoft.NETCore.App.Host.osx-arm64";
+    version = "6.0.30";
+    sha256 = "08k5v35mvcs712kb0vcfjd1dsas5rgwrmv8rn87mzjb2p6ajl3n3";
+  })
+  (fetchNuGet {
+    pname = "Microsoft.NETCore.App.Host.osx-x64";
+    version = "6.0.30";
+    sha256 = "02x38c68xan8hlr59mindcl4rcx49bbh4bibh6fw1l4rrijb38lw";
+  })
+  (fetchNuGet {
+    pname = "Microsoft.NETCore.App.Ref";
+    version = "6.0.30";
+    sha256 = "1wqqjhhlqz4dmijcx3kg3hnwq0s0jzqsddaksskzhq8avr4ziy18";
+  })
+  (fetchNuGet {
+    pname = "Microsoft.NETCore.App.Runtime.linux-arm64";
+    version = "6.0.30";
+    sha256 = "0xfhcig3gj3986rxp3dhnd8hvnj4nvyhz1fz7kpx342d3g53wb37";
+  })
+  (fetchNuGet {
+    pname = "Microsoft.NETCore.App.Runtime.linux-x64";
+    version = "6.0.30";
+    sha256 = "1s81sj8lnb8szqawxh3vc8wi815ln12cyhrl3f7hwcpay57xgswx";
+  })
+  (fetchNuGet {
+    pname = "Microsoft.NETCore.App.Runtime.osx-arm64";
+    version = "6.0.30";
+    sha256 = "0s71k92daakzwish65gmn4nniy6bf2hv34c0sb6m1hv3criqxmp4";
+  })
+  (fetchNuGet {
+    pname = "Microsoft.NETCore.App.Runtime.osx-x64";
+    version = "6.0.30";
+    sha256 = "0xybqg2wd240r1nm2vrbn2qbfqfnqsmxn1012zzwjn17wa2si9a1";
+  })
   (fetchNuGet {
     pname = "Microsoft.NETCore.Platforms";
     version = "2.0.0";
@@ -71,11 +141,6 @@
     version = "3.6.139";
     sha256 = "0npcryhq3r0c2zi940jk39h13mzc4hyg7z8gm6jdmxi1aqv1vh8c";
   })
-  (fetchNuGet {
-    pname = "NETStandard.Library.Ref";
-    version = "2.1.0";
-    sha256 = "12n76gymxq715lkrw841vi5r84kx746cxxssp22pd08as75jzsj6";
-  })
   (fetchNuGet {
     pname = "Newtonsoft.Json";
     version = "13.0.1";
@@ -188,8 +253,8 @@
   })
   (fetchNuGet {
     pname = "WoofWare.Myriad.Plugins";
-    version = "2.1.42";
+    version = "2.1.44";
-    sha256 = "0px46m734gsn1xa97111v1nwkyc2j52bw7z4bjdljzkmzzmnqa91";
+    sha256 = "0rp9hpkah60gd9x0ba2izr9ff1g7yhzv5a4pkhi5fbrwf5rpqpwx";
   })
   (fetchNuGet {
     pname = "WoofWare.Myriad.Plugins.Attributes";