AssertIsTrue: Simplify Assertion does not offer automatic fix to apply

[robertMSFTE]

Description

AssertIsTrue: Simplify Assertion does not offer automatic fix to apply.

Complete minimal example reproducing the issue

This gets a suggestion but there is no fix shown to apply in VS.

using Microsoft.VisualStudio.TestTools.UnitTesting;

namespace TestProject1
{
    [TestClass]
    public class UnitTest1
    {
        [TestMethod]
        public void TestMethod1()
        {
            Assert.IsTrue(true);
        }
    }
}

Expected behavior:

Fix suggestion should be shown.

Actual behavior:

Fix suggestion is not shown.

Versions

• Which version of Fluent Assertions Analyzers are you using? FluentAssertions.Analyzers 0.17.2
• Which .NET runtime and version are you targeting? .NET Core 3.1.

[Meir017]

I think the fix here should be to not trigger the analyzer since asserting a constant value does not do anything

[robertMSFTE]

@Meir017 This was just an example. The issue is that in general the fix never seems to be shown for this rule.

Example without a constant:

using Microsoft.VisualStudio.TestTools.UnitTesting;

namespace TestProject1
{
    [TestClass]
    public class UnitTest1
    {
        [TestMethod]
        public void TestMethod1()
        {
            Assert.IsTrue(ComputeSomething());
        }

        private bool ComputeSomething()
        {
            return true;
        }
    }
}

[Meir017]

Now this is interesting 🤔

[robertMSFTE]

Today I got this (which probably is related to why the fix does not work):

System.InvalidCastException : Unable to cast object of type 'Microsoft.CodeAnalysis.CSharp.Syntax.ExpressionStatementSyntax' to type 'Microsoft.CodeAnalysis.CSharp.Syntax.ExpressionSyntax'.
at async FluentAssertions.Analyzers.FluentAssertionsCodeFixProvider.RegisterCodeFixesAsync()
at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()
at async Microsoft.CodeAnalysis.CodeFixes.CodeFixService.GetCodeFixesAsync()
at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()
at async Microsoft.CodeAnalysis.Extensions.IExtensionManagerExtensions.PerformFunctionAsyncT

[Meir017]

@robertMSFTE can you share a minimal code sample to reproduce this error?

[robertMSFTE]

I saw this only once so far. Will add a repro if I get this to reproduce. (But the general behavior explained at the beginning is always there)

[MisinformedDNA]

I'm seeing a similar issue for xUnit.

I get a recommendation outside of a block, but not inside:

[Fact]
public void SomeTest()
{
    bool result = false;
    Assert.True(result);

    if (true)
    {
        Assert.True(result);
    }

    while (true)
    {
        Assert.True(result);
    }
}

[Meir017]

resolved by #167

[robertMSFTE]

@Meir017 The scenario still reproduces on 0.20.0 - aka. there is no fix suggestion.

[kimpenhaus]

@Meir017 we are running with FluentAssertions.Analyzers 0.24.0 and having the same behavior

Àssert.IsTrue / Assert.IsFalse only shows the suggestion but not the quix fix:

While others do:

Running inside Rider IDE 2023.2.2 and using .NET 7.0.401 (OSX 14.0)

MS-Test Version:

[kimpenhaus]

@Meir017
I could reporduce this with the simplest Test possible - not sure if that helps you but I've attached that as an sample. First I thought it might some sort of constellation with other analyzers or a more complex environment but it seems it also happens with only the things needed to run the tests under MSTest.

I appreciate the time you'll spend - thanks for that 🙏🏼

ConsoleApp2.zip