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Unit Testing of Compiler Diagnostic Fixes

info

Contributors implementing fixes in the roslynator repo should follow How to Add Compiler Diagnostic Fix and use AbstractCSharpCompilerDiagnosticFixVerifier. The examples below target consumers of the NuGet testing packages.

NuGet Package​

dotnet add package roslynator.testing.csharp.xunit

or

dotnet add package roslynator.testing.csharp.mstest

Example: Test Compiler Diagnostic Fix​

using Roslynator.Testing.CSharp.Xunit;
using Xunit;

public class ModifierIsNotValidForThisItemTests : XunitCompilerDiagnosticFixVerifier<RemoveModifierCodeFixProvider>
{
    public override string DiagnosticId { get; } = "CS0106";

    [Fact]
    public async Task Test()
    {
        await VerifyFixAsync(
            source: @"
struct S
{
    public virtual string M() => null;
}
",
            expectedSource: @"
struct S
{
    public string M() => null;
}
");
    }
}