Getting some positive early feedback on Bobcat.
From yesterday, how we retrofit Bobcat to an existing xunit test for readable specs:
jeremydmiller.com/2026/11/02/r...
From yesterday, how we retrofit Bobcat to an existing xunit test for readable specs:
jeremydmiller.com/2026/11/02/r...
Retrofitting existing xUnit.Net tests to Bobcat
Marten’s async daemon is the subsystem that runs projections and subscriptions in the background. It’s also been historically been the single hardest thing in Marten to test. Every test…
jeremydmiller.com
November 3, 2026 at 2:34 PM
Getting some positive early feedback on Bobcat.
From yesterday, how we retrofit Bobcat to an existing xunit test for readable specs:
jeremydmiller.com/2026/11/02/r...
From yesterday, how we retrofit Bobcat to an existing xunit test for readable specs:
jeremydmiller.com/2026/11/02/r...
ICYMI: (07/19/2022): "How to simplify your C# unit testing with a mocking framework." RPs and feedback are always appreciated! https://jjg.me/3aSrm9F #Articles #Mock #testing #Unit Tests
How to simplify your C# unit testing with a mocking framework
It’s time to take your unit testing to the next level. You’ve implemented either NUnit, or xUnit, or MSTest in your projects. You’ve gotten your code coverage to 80+%. But the are just some things that are hard to test or validate in your project. How do you test the “business logic” in your repository class? How do you test your dependent web service or database? Yeah, you can write special unit test and create fake objects to mimic these dependencies but why waste your time writing code that does not ship with the end product. Or write a lot of code with the ExcludeFromCoverage attribute :smile:. Well this is mocking comes in.
www.josephguadagno.net
November 8, 2026 at 4:00 PM
ICYMI: (07/19/2022): "How to simplify your C# unit testing with a mocking framework." RPs and feedback are always appreciated! https://jjg.me/3aSrm9F #Articles #Mock #testing #Unit Tests
An agent's EF Core report passes every correctness test and still runs 21 queries for 20 customers. A 30-line interceptor and one xUnit test make that a failing build.
tokenise.rosvetic.com/posts/ef-cor...
tokenise.rosvetic.com/posts/ef-cor...
November 1, 2026 at 4:15 PM
An agent's EF Core report passes every correctness test and still runs 21 queries for 20 customers. A 30-line interceptor and one xUnit test make that a failing build.
tokenise.rosvetic.com/posts/ef-cor...
tokenise.rosvetic.com/posts/ef-cor...
An agent-written invoice endpoint can pass every test and still let any signed-in user read anyone's invoice. One xUnit table of who may call what catches it, and a guard test fails when a new route has no rows.
tokenise.rosvetic.com/posts/author...
tokenise.rosvetic.com/posts/author...
November 2, 2026 at 11:17 AM
An agent-written invoice endpoint can pass every test and still let any signed-in user read anyone's invoice. One xUnit table of who may call what catches it, and a guard test fails when a new route has no rows.
tokenise.rosvetic.com/posts/author...
tokenise.rosvetic.com/posts/author...
ICYMI: (07/19/2022): "How to simplify your C# unit testing with a mocking framework." RPs and feedback are always appreciated! https://jjg.me/3aSrm9F #Articles #Mock #testing #Unit Tests
How to simplify your C# unit testing with a mocking framework
It’s time to take your unit testing to the next level. You’ve implemented either NUnit, or xUnit, or MSTest in your projects. You’ve gotten your code coverage to 80+%. But the are just some things that are hard to test or validate in your project. How do you test the “business logic” in your repository class? How do you test your dependent web service or database? Yeah, you can write special unit test and create fake objects to mimic these dependencies but why waste your time writing code that does not ship with the end product. Or write a lot of code with the ExcludeFromCoverage attribute :smile:. Well this is mocking comes in.
www.josephguadagno.net
November 1, 2026 at 4:00 PM
ICYMI: (07/19/2022): "How to simplify your C# unit testing with a mocking framework." RPs and feedback are always appreciated! https://jjg.me/3aSrm9F #Articles #Mock #testing #Unit Tests
yesterday I fixed integration tests in my little practice #api
I struggled to inject app config values for tests instead of those in appsettings. the problem was my factory changing config AFTER app build due to wrong fixture use
#buildinpublic #dev #dotnet #qa #testing #xunit #aspnetcore
I struggled to inject app config values for tests instead of those in appsettings. the problem was my factory changing config AFTER app build due to wrong fixture use
#buildinpublic #dev #dotnet #qa #testing #xunit #aspnetcore
October 29, 2026 at 8:48 PM
yesterday I fixed integration tests in my little practice #api
I struggled to inject app config values for tests instead of those in appsettings. the problem was my factory changing config AFTER app build due to wrong fixture use
#buildinpublic #dev #dotnet #qa #testing #xunit #aspnetcore
I struggled to inject app config values for tests instead of those in appsettings. the problem was my factory changing config AFTER app build due to wrong fixture use
#buildinpublic #dev #dotnet #qa #testing #xunit #aspnetcore
pt 2, showing the fixed tests
basically solved by moving the values injection to factory class instead of test constructors 🤦
(tests taking up to 7.5 mins in last pic - its ok, they are for a periodically working service)
#buildinpublic #dev #dotnet #qa #testing #xunit #aspnetcore #githubactions
basically solved by moving the values injection to factory class instead of test constructors 🤦
(tests taking up to 7.5 mins in last pic - its ok, they are for a periodically working service)
#buildinpublic #dev #dotnet #qa #testing #xunit #aspnetcore #githubactions
October 29, 2026 at 8:48 PM
pt 2, showing the fixed tests
basically solved by moving the values injection to factory class instead of test constructors 🤦
(tests taking up to 7.5 mins in last pic - its ok, they are for a periodically working service)
#buildinpublic #dev #dotnet #qa #testing #xunit #aspnetcore #githubactions
basically solved by moving the values injection to factory class instead of test constructors 🤦
(tests taking up to 7.5 mins in last pic - its ok, they are for a periodically working service)
#buildinpublic #dev #dotnet #qa #testing #xunit #aspnetcore #githubactions
ICYMI: (06/14/2020): "Speed up Creating Code with Live Templates in JetBrains Rider or ReSharper." RPs and feedback are always appreciated! https://jjg.me/2B7m1cq #Articles #JetBrains #Productivity #ReSharper #Rider #Unit Tests
Speed up Creating Code with Live Templates in JetBrains Rider or ReSharper
For the past few weekends, I’ve been working rebuilding a library I wrote to make it easier to use Azure Storage. I started this library about 4 or 5 years ago, and it did not have ‘true’ unit tests. I’m not going to talk about what makes a good unit test and what doesn’t. There are plenty of posts around that! I decided to rewrite all of the tests and move to xUnit. After creating about the 50th test or so, I noticed a pattern in the initial shell of the tests. Most of the tests looked like this.
www.josephguadagno.net
October 29, 2026 at 4:00 PM
ICYMI: (06/14/2020): "Speed up Creating Code with Live Templates in JetBrains Rider or ReSharper." RPs and feedback are always appreciated! https://jjg.me/2B7m1cq #Articles #JetBrains #Productivity #ReSharper #Rider #Unit Tests
ICYMI: (06/14/2020): "Speed up Creating Code with Live Templates in JetBrains Rider or ReSharper." RPs and feedback are always appreciated! https://jjg.me/2B7m1cq #Articles #JetBrains #Productivity #ReSharper #Rider #Unit Tests
Speed up Creating Code with Live Templates in JetBrains Rider or ReSharper
For the past few weekends, I’ve been working rebuilding a library I wrote to make it easier to use Azure Storage. I started this library about 4 or 5 years ago, and it did not have ‘true’ unit tests. I’m not going to talk about what makes a good unit test and what doesn’t. There are plenty of posts around that! I decided to rewrite all of the tests and move to xUnit. After creating about the 50th test or so, I noticed a pattern in the initial shell of the tests. Most of the tests looked like this.
www.josephguadagno.net
October 25, 2026 at 4:00 PM
ICYMI: (06/14/2020): "Speed up Creating Code with Live Templates in JetBrains Rider or ReSharper." RPs and feedback are always appreciated! https://jjg.me/2B7m1cq #Articles #JetBrains #Productivity #ReSharper #Rider #Unit Tests
Your usual .NET testing workflow may be changing. A new xUnit test project on the .NET 10 SDK revealed unexpected changes, from a new global.json file to command-line options that no longer worked as expected.
Read full the blog: buff.ly/jy9JZZI
Read full the blog: buff.ly/jy9JZZI
Wait...Who Moved My dotnet test? -- Visual Studio Live!: Training Conferences and Events for Enterprise Microsoft .NET and Azure Developers
Microsoft.Testing.Platform brings a new way to run .NET tests, changing how xUnit v3 projects work with <code>dotnet test</code>, command-line options and CI pipelines.
buff.ly
October 23, 2026 at 4:02 PM
Your usual .NET testing workflow may be changing. A new xUnit test project on the .NET 10 SDK revealed unexpected changes, from a new global.json file to command-line options that no longer worked as expected.
Read full the blog: buff.ly/jy9JZZI
Read full the blog: buff.ly/jy9JZZI
Your usual .NET testing workflow may be changing. A new xUnit test project on the .NET 10 SDK revealed unexpected changes, from a new global.json file to command-line options that no longer worked as expected.
Read full the blog: buff.ly/jy9JZZI
Read full the blog: buff.ly/jy9JZZI
Wait...Who Moved My dotnet test? -- Visual Studio Live!: Training Conferences and Events for Enterprise Microsoft .NET and Azure Developers
Microsoft.Testing.Platform brings a new way to run .NET tests, changing how xUnit v3 projects work with <code>dotnet test</code>, command-line options and CI pipelines.
vslive.com
October 23, 2026 at 4:02 PM
Your usual .NET testing workflow may be changing. A new xUnit test project on the .NET 10 SDK revealed unexpected changes, from a new global.json file to command-line options that no longer worked as expected.
Read full the blog: buff.ly/jy9JZZI
Read full the blog: buff.ly/jy9JZZI
The Critter Stack is adding a new testing tool to make integration tests be more reliable and to turn xUnit/TUnit/NUnit/MSTest into an effective BDD inspired Executable Specifications tool
jasperfx.net/news/bobcat-...
jasperfx.net/news/bobcat-...
Succeeding with Test Automation using Bobcat
Bobcat is the Critter Stack's new spec-driven integration testing framework, and we have already used it to make our own CI builds and local gating faster and more trustworthy. This is the test automa...
jasperfx.net
October 20, 2026 at 9:19 PM
The Critter Stack is adding a new testing tool to make integration tests be more reliable and to turn xUnit/TUnit/NUnit/MSTest into an effective BDD inspired Executable Specifications tool
jasperfx.net/news/bobcat-...
jasperfx.net/news/bobcat-...
The Secret Trick To Keep Copilot On Track With Your C# Code
Building on our vibe-coded Roslyn analyzer series, this video introduces an analyzer for xUnit Assert methods that force Copilot -- or your favorite LLM -- to write more helpful assertions.
Watch it here:
https://bgh.st/91samc
Building on our vibe-coded Roslyn analyzer series, this video introduces an analyzer for xUnit Assert methods that force Copilot -- or your favorite LLM -- to write more helpful assertions.
Watch it here:
https://bgh.st/91samc
October 12, 2026 at 9:00 PM
The Secret Trick To Keep Copilot On Track With Your C# Code
Building on our vibe-coded Roslyn analyzer series, this video introduces an analyzer for xUnit Assert methods that force Copilot -- or your favorite LLM -- to write more helpful assertions.
Watch it here:
https://bgh.st/91samc
Building on our vibe-coded Roslyn analyzer series, this video introduces an analyzer for xUnit Assert methods that force Copilot -- or your favorite LLM -- to write more helpful assertions.
Watch it here:
https://bgh.st/91samc
For anyone interested: weird combination of .NET 10 SDK (no more BinaryFormatter allowed, VSTest possibly no longer allowed in favour of MTP?), XUnit and unit test related package versions, and (possibly?) AppLocker/WDAC/Group Policyblokcing running of ..\bin\Debug\net8.0\testhost.exe #OrSomething
October 12, 2026 at 8:41 AM
For anyone interested: weird combination of .NET 10 SDK (no more BinaryFormatter allowed, VSTest possibly no longer allowed in favour of MTP?), XUnit and unit test related package versions, and (possibly?) AppLocker/WDAC/Group Policyblokcing running of ..\bin\Debug\net8.0\testhost.exe #OrSomething
![YAML C#
- script: |
set -euo pipefail
cat <<'EOF' | dotnet run -
#:sdk Cake.Sdk@6.3.0
#:package OpenAI@2.5.0
#:package xunit.v3.assert@4.0.2
using OpenAI;
using OpenAI.Chat;
using System.ClientModel;
using Xunit;
Task("Pong")
.Does(async () =>
{
var client = new ChatClient(
model: Environment.GetEnvironmentVariable("LLAMA_CHAT_MODEL")!,
credential: new ApiKeyCredential(Environment.GetEnvironmentVariable("OPENAI_API_KEY") ?? "local"),
options: new OpenAIClientOptions
{
Endpoint = new Uri(Environment.GetEnvironmentVariable("LLAMA_BASE_URL")!)
});
ChatCompletion completion = await client.CompleteChatAsync("Reply with exactly: pong");
string? text = completion.Content is [var content] ? content.Text?.Trim() : null;
Information($"Response: {text}");
Assert.Contains("pong", text, StringComparison.OrdinalIgnoreCase);
});
RunTarget("Pong");
EOF
displayName: Test Cake.Sdk against local llama.cpp
timeoutInMinutes: 10](https://cdn.bsky.app/img/feed_thumbnail/plain/did:plc:4mkgcy4uuj7gwvvb3sze3cpp/bafkreiabn43mrrces43r6ixurw5ec6wz3smje3673dwo6bjbdvp5tzj2ri)
What's faster? Task.WhenAll or Parallel.ForEach? Only one way to find out!
https://youtu.be/iEfuyxwKQCE
A fun look at composition (compared to inheritence). No experience required for this one!
https://youtu.be/rohq-Wqj0yI
Getting setup with xUnit for writing unit tests!
https://youtu.be/iEfuyxwKQCE
A fun look at composition (compared to inheritence). No experience required for this one!
https://youtu.be/rohq-Wqj0yI
Getting setup with xUnit for writing unit tests!
https://youtu.be/rohq-Wqj0yI
https://youtu.be/rohq-Wqj0yI
youtu.be
October 8, 2026 at 7:00 PM
What's faster? Task.WhenAll or Parallel.ForEach? Only one way to find out!
https://youtu.be/iEfuyxwKQCE
A fun look at composition (compared to inheritence). No experience required for this one!
https://youtu.be/rohq-Wqj0yI
Getting setup with xUnit for writing unit tests!
https://youtu.be/iEfuyxwKQCE
A fun look at composition (compared to inheritence). No experience required for this one!
https://youtu.be/rohq-Wqj0yI
Getting setup with xUnit for writing unit tests!
ICYMI: (07/19/2022): "How to simplify your C# unit testing with a mocking framework." RPs and feedback are always appreciated! https://jjg.me/3aSrm9F #Articles #Mock #testing #Unit Tests
How to simplify your C# unit testing with a mocking framework
It’s time to take your unit testing to the next level. You’ve implemented either NUnit, or xUnit, or MSTest in your projects. You’ve gotten your code coverage to 80+%. But the are just some things that are hard to test or validate in your project. How do you test the “business logic” in your repository class? How do you test your dependent web service or database? Yeah, you can write special unit test and create fake objects to mimic these dependencies but why waste your time writing code that does not ship with the end product. Or write a lot of code with the ExcludeFromCoverage attribute :smile:. Well this is mocking comes in.
www.josephguadagno.net
October 8, 2026 at 4:00 PM
ICYMI: (07/19/2022): "How to simplify your C# unit testing with a mocking framework." RPs and feedback are always appreciated! https://jjg.me/3aSrm9F #Articles #Mock #testing #Unit Tests
That system has rules, and one of them is that I can't hire junior devs due to cost
So when I need a mock built for testing purposes, or I need tests written using xunit for a set of acceptance criteria I already wrote, I reach for a low-end model and then I review its output
So when I need a mock built for testing purposes, or I need tests written using xunit for a set of acceptance criteria I already wrote, I reach for a low-end model and then I review its output
October 7, 2026 at 3:11 PM
That system has rules, and one of them is that I can't hire junior devs due to cost
So when I need a mock built for testing purposes, or I need tests written using xunit for a set of acceptance criteria I already wrote, I reach for a low-end model and then I review its output
So when I need a mock built for testing purposes, or I need tests written using xunit for a set of acceptance criteria I already wrote, I reach for a low-end model and then I review its output
xUnit Tests Not Running With .NET Standard
Read it on Medium:
https://medium.devleader.ca/xunit-tests-not-running-with-net-standard-34582bdac3d9
Read it on Medium:
https://medium.devleader.ca/xunit-tests-not-running-with-net-standard-34582bdac3d9
October 3, 2026 at 9:00 AM
xUnit Tests Not Running With .NET Standard
Read it on Medium:
https://medium.devleader.ca/xunit-tests-not-running-with-net-standard-34582bdac3d9
Read it on Medium:
https://medium.devleader.ca/xunit-tests-not-running-with-net-standard-34582bdac3d9
- How to Test Internal Classes: https://youtu.be/TjsM3oVg5_w
- Learn xUnit: https://youtu.be/rohq-Wqj0yI
- Why Write Tests (Practical Example): https://youtu.be/Bpvs8g4ArwU
- Composition Helps Testing: https://youtu.be/CQd2x2_3Tpc
Strings:
- Comparing Strings: https://youtu.be/nFFKfbuOvQw
- Learn xUnit: https://youtu.be/rohq-Wqj0yI
- Why Write Tests (Practical Example): https://youtu.be/Bpvs8g4ArwU
- Composition Helps Testing: https://youtu.be/CQd2x2_3Tpc
Strings:
- Comparing Strings: https://youtu.be/nFFKfbuOvQw
https://youtu.be/nFFKfbuOvQw
https://youtu.be/nFFKfbuOvQw
youtu.be
September 30, 2026 at 7:00 PM
- How to Test Internal Classes: https://youtu.be/TjsM3oVg5_w
- Learn xUnit: https://youtu.be/rohq-Wqj0yI
- Why Write Tests (Practical Example): https://youtu.be/Bpvs8g4ArwU
- Composition Helps Testing: https://youtu.be/CQd2x2_3Tpc
Strings:
- Comparing Strings: https://youtu.be/nFFKfbuOvQw
- Learn xUnit: https://youtu.be/rohq-Wqj0yI
- Why Write Tests (Practical Example): https://youtu.be/Bpvs8g4ArwU
- Composition Helps Testing: https://youtu.be/CQd2x2_3Tpc
Strings:
- Comparing Strings: https://youtu.be/nFFKfbuOvQw
running the tests in freeq this was the xunit original github.com/limadelic/el...
September 22, 2026 at 7:21 PM
running the tests in freeq this was the xunit original github.com/limadelic/el...
From vague prompt chaos to a clean Minimal API ticketing app, solid tech docs turned Claude into a reliable code generator. Practical lessons on steering EF migrations, xUnit quirks, and project conventions with AI.
#dotnet #csharp #ai
#dotnet #csharp #ai
Creating .NET apps takes forever - then we tried AI
bbb.dev
September 15, 2026 at 4:05 PM
Ayer a la IA tuve que enseñarle yo cómo migrar a xunit 4.0.0 y los cambios en la línea de comandos de dotnet test para generar los trx y los xml.
A ver si nos destruye de una santa vez.
A ver si nos destruye de una santa vez.
September 10, 2026 at 6:46 AM
Ayer a la IA tuve que enseñarle yo cómo migrar a xunit 4.0.0 y los cambios en la línea de comandos de dotnet test para generar los trx y los xml.
A ver si nos destruye de una santa vez.
A ver si nos destruye de una santa vez.
I'm not sure I'm exactly there yet! I was working on the flavor of it today where you can do some light mark up with comments or yes, attributes inside of xunit/tunit tests and get the rendered specs and spec execution watching that Storyteller had way back when
September 8, 2026 at 10:47 PM
I'm not sure I'm exactly there yet! I was working on the flavor of it today where you can do some light mark up with comments or yes, attributes inside of xunit/tunit tests and get the rendered specs and spec execution watching that Storyteller had way back when