public static void FieldAddedToFormComponents(string expression)
{
var syntaxTree = CSharpSyntaxTree.ParseText(@"
namespace N
{
using System.IO;
using System.Windows.Forms;
public class Winform : Form
{
private readonly Stream stream;
Winform()
{
this.stream = File.OpenRead(string.Empty);
// Since this is added to components, it is automatically disposed of with the form.
this.components.Add(this.stream);
}
}
}".AssertReplace("this.components.Add(this.stream)", expression));
var compilation = CSharpCompilation.Create("test", new[] { syntaxTree }, MetadataReferences.FromAttributes());
var semanticModel = compilation.GetSemanticModel(syntaxTree);
var declaration = syntaxTree.FindFieldDeclaration("stream");
var symbol = semanticModel.GetDeclaredSymbolSafe(declaration, CancellationToken.None);
Assert.AreEqual(Result.Yes, DisposableMember.IsDisposed(new FieldOrPropertyAndDeclaration(symbol, declaration), semanticModel, CancellationToken.None));
}
public static void SimpleFieldIAsyncDisposable()
{
var syntaxTree = CSharpSyntaxTree.ParseText(@"
namespace N
{
using System;
using System.IO;
using System.Threading.Tasks;
public class C : IAsyncDisposable
{
private readonly IAsyncDisposable disposable = File.OpenRead(string.Empty);
public async ValueTask DisposeAsync()
{
await this.disposable.DisposeAsync();
}
}
}");
var compilation = CSharpCompilation.Create("test", new[] { syntaxTree }, MetadataReferences.FromAttributes());
var semanticModel = compilation.GetSemanticModel(syntaxTree);
var declaration = syntaxTree.FindFieldDeclaration("disposable");
var symbol = semanticModel.GetDeclaredSymbolSafe(declaration, CancellationToken.None);
Assert.AreEqual(Result.Yes, DisposableMember.IsDisposed(new FieldOrPropertyAndDeclaration(symbol, declaration), semanticModel, CancellationToken.None));
}
public static void DisposedInOverridden()
{
var syntaxTree = CSharpSyntaxTree.ParseText(@"
namespace N
{
using System;
using System.IO;
abstract class BaseClass : IDisposable
{
public void Dispose()
{
this.M();
}
protected abstract void M();
}
class C : BaseClass
{
private readonly IDisposable stream = File.OpenRead(string.Empty);
protected override void M()
{
this.stream.Dispose();
}
}
}");
var compilation = CSharpCompilation.Create("test", new[] { syntaxTree }, MetadataReferences.FromAttributes());
var semanticModel = compilation.GetSemanticModel(syntaxTree);
var declaration = syntaxTree.FindFieldDeclaration("stream");
var symbol = semanticModel.GetDeclaredSymbolSafe(declaration, CancellationToken.None);
Assert.AreEqual(Result.Yes, DisposableMember.IsDisposed(new FieldOrPropertyAndDeclaration(symbol, declaration), semanticModel, CancellationToken.None));
}
public static void DisposedInExplicitImplementation()
{
var syntaxTree = CSharpSyntaxTree.ParseText(@"
namespace N
{
using System;
using System.IO;
sealed class C : IDisposable
{
private readonly IDisposable stream = File.OpenRead(string.Empty);
void IDisposable.Dispose()
{
this.stream.Dispose();
}
}
}");
var compilation = CSharpCompilation.Create("test", new[] { syntaxTree }, MetadataReferences.FromAttributes());
var semanticModel = compilation.GetSemanticModel(syntaxTree);
var declaration = syntaxTree.FindFieldDeclaration("stream");
var symbol = semanticModel.GetDeclaredSymbolSafe(declaration, CancellationToken.None);
var field = new FieldOrPropertyAndDeclaration(symbol, declaration);
Assert.AreEqual(Result.Yes, DisposableMember.IsDisposed(field, semanticModel, CancellationToken.None));
}