FSharp FsUnit No test is available in Make sure that test discoverer & executors are registered and platform & framework - f#

Question

OK so a google search reveals 100s if not thousands of links but they are very old threads talking about NUnit and Nuget. I am not using these these tools.
I am writing a F# project with FsUnit and dotnet command line (no visual studio business).
I created a F# project like
dotnet new console -lang "F#" -o CustomerProject
dotnet add package FsUnit
dotnet add package FsUnit.Xunit
dotnet add package Microsoft.TestPlatform
dotnet add package Microsoft.TestPlatform.TestHost
So my .fsproj file looks like
<Project Sdk="Microsoft.NET.Sdk">
<PropertyGroup>
<OutputType>Exe</OutputType>
<TargetFramework>net6.0</TargetFramework>
</PropertyGroup>
<ItemGroup>
<Compile Include="Customer.fs" />
<Compile Include="CustomerTests.fs" />
</ItemGroup>
<ItemGroup>
<PackageReference Include="FsUnit" Version="5.0.5" />
<PackageReference Include="FsUnit.Xunit" Version="5.0.5" />
<PackageReference Include="Microsoft.TestPlatform" Version="17.3.2" />
<PackageReference Include="Microsoft.TestPlatform.TestHost" Version="17.3.2" />
</ItemGroup>
</Project>
In my project directory I have 2 files
Customer.fs
namespace MyProject.Customer
open System
type Customer = {
Id : int
isVip: bool
Credit: decimal
}
module Domain =
let getPurchases customer =
let purchases = if customer.Id % 2 = 0 then 120M else 80M in
(customer, purchases)
let tryPromoteToVip purchases =
let (customer, amount) = purchases in
if amount > 100M then {customer with isVip = true} else customer
let increaseCreditIfVip customer =
let increase = if customer.isVip then 100M else 50M in
{customer with Credit = customer.Credit + increase}
let upgradeCustomer customer =
customer
|> getPurchases
|> tryPromoteToVip
|> increaseCreditIfVip
CustomerTests.fs
module CustomerTests
open Xunit
open FsUnit
open MyProject.Customer
open MyProject.Customer.Domain
module ``When upgrading customer`` =
let customerVIP = {Id = 1; isVip = true; Credit = 0.0M}
let customerSTD = {Id = 2; isVip = false; Credit = 100.0M}
[<Fact>]
let ``should give VIP cstomer more credit`` () =
let expected = {customerVIP with Credit = customerVIP.Credit + 100.0M }
let actual = upgradeCustomer customerVIP
actual |> should equal expected
yet when I run dotnet test from the command line I get an error
No test is available in /Users/user/code/fsharp/CustomerProject/bin/Debug/net6.0/CustomerProject.dll. Make sure that test discoverer & executors are registered and platform & framework version settings are appropriate and try again.
Additionally, path to test adapters can be specified using /TestAdapterPath command. Example /TestAdapterPath:<pathToCustomAdapters>.

Answer 1

According to this SO answer, you need to add an xUnit runner to your project as well. And according to the xUnit documentation, you have to add xunit.runner.visualstudio, even if you just want to use dotnet test:
dotnet add package xunit.runner.visualstudio
(There's also an xunit.runner.console package on NuGet, but I think it's just for old .NET Framework projects.)