Test fails when SourceGeneratorTest<TVerifier>.TestState.Sources depends on generated source code

[kzrnm]

Steps to Reproduce:

c2ab239

SourceGeneratorTest.TestState.Sources depends on generated source code.

using System;
using System.Collections.Generic;
using System.Text;

namespace Microsoft.CodeAnalysis.Testing.TestGenerators
{
    public class AddSimpleAttribute : ISourceGenerator
    {
        public void Initialize(GeneratorInitializationContext context)
        {
        }

        public virtual void Execute(GeneratorExecutionContext context)
        {
            context.AddSource("SimpleAttribute", "using System;[AttributeUsage(AttributeTargets.All)] internal sealed class SimpleAttribute : Attribute { }");
        }
    }
}

await new CSharpSourceGeneratorTest<AddSimpleAttribute>
{
    TestBehaviors = TestBehaviors.SkipGeneratedSourcesCheck,
    TestState =
    {
        Sources =
        {
            @"[Simple]class S {}",
        },
        GeneratedSources =
        {
            (typeof(AddSimpleAttribute), "SimpleAttribute.cs", "using System;[AttributeUsage(AttributeTargets.All)] internal sealed class SimpleAttribute : Attribute { }"),
        },
    },
}.RunAsync();

Expected Behavior:

Success

Actual Behavior:

System.InvalidOperationException : Context: Diagnostics of test state
Mismatch between number of diagnostics returned, expected "0" actual "2"

Adding diagnostics to ExpectedDiagnostics will solve the problem, but it is different from the actual compilation result.

[sharwell]

This should have been fixed by #776. Can you try updating the library and check again?

[kzrnm]

Great! I want this behavior!

[sharwell]

@naminodarie Note that this line completely disables validation for your source generator:

TestBehaviors = TestBehaviors.SkipGeneratedSourcesCheck,

You'll want to remove this line and just use the default behaviors.

[kzrnm]

@sharwell Thank you for your advice!