ConvertToTopLevelStatementsAnalyzerTests.cs

// Licensed to the .NET Foundation under one or more agreements.
// The .NET Foundation licenses this file to you under the MIT license.
// See the LICENSE file in the project root for more information.
 
using System.Collections.Generic;
using System.Threading.Tasks;
using Microsoft.CodeAnalysis.CodeStyle;
using Microsoft.CodeAnalysis.CSharp;
using Microsoft.CodeAnalysis.CSharp.CodeStyle;
using Microsoft.CodeAnalysis.CSharp.ConvertProgram;
using Microsoft.CodeAnalysis.CSharp.TopLevelStatements;
using Microsoft.CodeAnalysis.Editor.UnitTests.CodeActions;
using Microsoft.CodeAnalysis.Testing;
using Xunit;
 
namespace Microsoft.CodeAnalysis.Editor.CSharp.UnitTests.ConvertProgram;
 
using VerifyCS = CSharpCodeFixVerifier<ConvertToTopLevelStatementsDiagnosticAnalyzer, ConvertToTopLevelStatementsCodeFixProvider>;
 
public class ConvertToTopLevelStatementsAnalyzerTests
{
    public static IEnumerable<object[]> EndOfDocumentSequences
    {
        get
        {
            yield return new object[] { "" };
            yield return new object[] { "\r\n" };
        }
    }
 
    [Fact]
    public async Task NotOfferedWhenUserPrefersProgramMain()
    {
        var code = @"
class Program
{
    static void Main(string[] args)
    {
        System.Console.WriteLine(0);
    }
}
";
 
        await new VerifyCS.Test
        {
            TestCode = code,
            LanguageVersion = LanguageVersion.CSharp9,
            TestState = { OutputKind = OutputKind.ConsoleApplication },
            Options = { { CSharpCodeStyleOptions.PreferTopLevelStatements, false } },
        }.RunAsync();
    }
 
    [Fact]
    public async Task NotOfferedPriorToCSharp9()
    {
        var code = @"
class Program
{
    static void Main(string[] args)
    {
        System.Console.WriteLine(0);
    }
}
";
 
        await new VerifyCS.Test
        {
            TestCode = code,
            LanguageVersion = LanguageVersion.CSharp8,
            TestState = { OutputKind = OutputKind.ConsoleApplication },
            Options = { { CSharpCodeStyleOptions.PreferTopLevelStatements, true } },
        }.RunAsync();
    }
 
    [Fact]
    public async Task OfferedInCSharp9()
    {
        await new VerifyCS.Test
        {
            TestCode = @"
class Program
{
    {|IDE0210:static void Main(string[] args)
    {
        System.Console.WriteLine(0);
    }|}
}
",
            FixedCode = @"
System.Console.WriteLine(0);
",
            LanguageVersion = LanguageVersion.CSharp9,
            TestState = { OutputKind = OutputKind.ConsoleApplication },
            Options = { { CSharpCodeStyleOptions.PreferTopLevelStatements, true } },
        }.RunAsync();
    }
 
    [Fact]
    public async Task TestFileHeader1()
    {
        await new VerifyCS.Test
        {
            TestCode = @"// This is a file header
 
class Program
{
    {|IDE0210:static void Main(string[] args)
    {
        System.Console.WriteLine(0);
    }|}
}
",
            FixedCode = @"// This is a file header
 
System.Console.WriteLine(0);
",
            LanguageVersion = LanguageVersion.CSharp9,
            TestState = { OutputKind = OutputKind.ConsoleApplication },
            Options = { { CSharpCodeStyleOptions.PreferTopLevelStatements, true } },
        }.RunAsync();
    }
 
    [Fact]
    public async Task TestFileHeader2()
    {
        await new VerifyCS.Test
        {
            TestCode = @"// This is a file header
 
namespace N
{
    class Program
    {
        {|IDE0210:static void Main(string[] args)
        {
            System.Console.WriteLine(0);
        }|}
    }
}
",
            FixedCode = @"// This is a file header
 
System.Console.WriteLine(0);
",
            LanguageVersion = LanguageVersion.CSharp9,
            TestState = { OutputKind = OutputKind.ConsoleApplication },
            Options = { { CSharpCodeStyleOptions.PreferTopLevelStatements, true } },
        }.RunAsync();
    }
 
    [Fact]
    public async Task TestFileHeader3()
    {
        await new VerifyCS.Test
        {
            TestCode = @"// This is a file header
 
namespace N;
 
class Program
{
    {|IDE0210:static void Main(string[] args)
    {
        System.Console.WriteLine(0);
    }|}
}
",
            FixedCode = @"// This is a file header
 
 
System.Console.WriteLine(0);
",
            LanguageVersion = LanguageVersion.CSharp10,
            TestState = { OutputKind = OutputKind.ConsoleApplication },
            Options = { { CSharpCodeStyleOptions.PreferTopLevelStatements, true } },
        }.RunAsync();
    }
 
    [Fact]
    public async Task TestFileHeader4()
    {
        await new VerifyCS.Test
        {
            TestCode = @"// This is a file header
using System;
 
namespace N;
 
class Program
{
    {|IDE0210:static void Main(string[] args)
    {
        System.Console.WriteLine(0);
    }|}
}
",
            FixedCode = @"// This is a file header
using System;
 
System.Console.WriteLine(0);
",
            LanguageVersion = LanguageVersion.CSharp10,
            TestState = { OutputKind = OutputKind.ConsoleApplication },
            Options = { { CSharpCodeStyleOptions.PreferTopLevelStatements, true } },
        }.RunAsync();
    }
 
    [Fact]
    public async Task OfferedWithoutArgs()
    {
        await new VerifyCS.Test
        {
            TestCode = @"
class Program
{
    {|IDE0210:static void Main()
    {
        System.Console.WriteLine(0);
    }|}
}
",
            FixedCode = @"
System.Console.WriteLine(0);
",
            LanguageVersion = LanguageVersion.CSharp9,
            TestState = { OutputKind = OutputKind.ConsoleApplication },
            Options = { { CSharpCodeStyleOptions.PreferTopLevelStatements, true } },
        }.RunAsync();
    }
 
    [Fact]
    public async Task NotOfferedInLibrary()
    {
        var code = @"
class Program
{
    static void Main()
    {
        System.Console.WriteLine(0);
    }
}
";
 
        await new VerifyCS.Test
        {
            TestCode = code,
            LanguageVersion = LanguageVersion.CSharp9,
            Options = { { CSharpCodeStyleOptions.PreferTopLevelStatements, true } },
        }.RunAsync();
    }
 
    [Fact]
    public async Task OfferedOnNameWhenNotHidden()
    {
        await new VerifyCS.Test
        {
            TestCode = @"
class Program
{
    static void {|IDE0210:Main|}(string[] args)
    {
        System.Console.WriteLine(0);
    }
}
",
            FixedCode = @"
System.Console.WriteLine(0);
",
            LanguageVersion = LanguageVersion.CSharp9,
            TestState = { OutputKind = OutputKind.ConsoleApplication },
            Options = { { CSharpCodeStyleOptions.PreferTopLevelStatements, true, NotificationOption2.Suggestion } },
        }.RunAsync();
    }
 
    [Fact]
    public async Task NotOnNonStaticMain()
    {
        var code = @"
class Program
{
    void Main(string[] args)
    {
        System.Console.WriteLine(0);
    }
}
";
 
        await new VerifyCS.Test
        {
            TestCode = code,
            LanguageVersion = LanguageVersion.CSharp9,
            TestState = { OutputKind = OutputKind.ConsoleApplication },
            Options = { { CSharpCodeStyleOptions.PreferTopLevelStatements, true, NotificationOption2.Suggestion } },
            ExpectedDiagnostics =
            {
                // error CS5001: Program does not contain a static 'Main' method suitable for an entry point
                DiagnosticResult.CompilerError("CS5001"),
            }
        }.RunAsync();
    }
 
    [Fact]
    public async Task NotOnGenericMain()
    {
        var code = @"
class Program
{
    static void Main<T>(string[] args)
    {
        System.Console.WriteLine(0);
    }
}
";
 
        await new VerifyCS.Test
        {
            TestCode = code,
            LanguageVersion = LanguageVersion.CSharp9,
            TestState = { OutputKind = OutputKind.ConsoleApplication },
            Options = { { CSharpCodeStyleOptions.PreferTopLevelStatements, true, NotificationOption2.Suggestion } },
            ExpectedDiagnostics =
            {
                // error CS5001: Program does not contain a static 'Main' method suitable for an entry point
                DiagnosticResult.CompilerError("CS5001"),
            }
        }.RunAsync();
    }
 
    [Fact]
    public async Task NotOnRandomMethod()
    {
        var code = @"
class Program
{
    static void Main1(string[] args)
    {
        System.Console.WriteLine(0);
    }
}
";
 
        await new VerifyCS.Test
        {
            TestCode = code,
            LanguageVersion = LanguageVersion.CSharp9,
            TestState = { OutputKind = OutputKind.ConsoleApplication },
            Options = { { CSharpCodeStyleOptions.PreferTopLevelStatements, true, NotificationOption2.Suggestion } },
            ExpectedDiagnostics =
            {
                // error CS5001: Program does not contain a static 'Main' method suitable for an entry point
                DiagnosticResult.CompilerError("CS5001"),
            }
        }.RunAsync();
    }
 
    [Fact]
    public async Task NotOnMethodWithNoBody()
    {
        var code = @"
class Program
{
    static void {|CS0501:Main|}(string[] args);
}
";
 
        await new VerifyCS.Test
        {
            TestCode = code,
            LanguageVersion = LanguageVersion.CSharp9,
            TestState = { OutputKind = OutputKind.ConsoleApplication },
            Options = { { CSharpCodeStyleOptions.PreferTopLevelStatements, true, NotificationOption2.Suggestion } },
        }.RunAsync();
    }
 
    [Fact]
    public async Task NotOnExpressionBody()
    {
        // we could choose to support this in the future.  It's not supported for now for simplicity.
        var code = @"
class Program
{
    static void Main(string[] args)
        => System.Console.WriteLine(0);
}
";
 
        await new VerifyCS.Test
        {
            TestCode = code,
            LanguageVersion = LanguageVersion.CSharp9,
            TestState = { OutputKind = OutputKind.ConsoleApplication },
            Options = { { CSharpCodeStyleOptions.PreferTopLevelStatements, true, NotificationOption2.Suggestion } },
        }.RunAsync();
    }
 
    [Fact]
    public async Task NotOnTypeWithInheritance1()
    {
        var code = @"
class Program : System.Exception
{
    static void Main(string[] args)
    {
        System.Console.WriteLine(0);
    }
}
";
 
        await new VerifyCS.Test
        {
            TestCode = code,
            LanguageVersion = LanguageVersion.CSharp9,
            TestState = { OutputKind = OutputKind.ConsoleApplication },
            Options = { { CSharpCodeStyleOptions.PreferTopLevelStatements, true, NotificationOption2.Suggestion } },
        }.RunAsync();
    }
 
    [Fact]
    public async Task NotOnTypeWithInheritance2()
    {
        var code = @"
class Program : {|CS0535:System.IComparable|}
{
    static void Main(string[] args)
    {
        System.Console.WriteLine(0);
    }
}
";
 
        await new VerifyCS.Test
        {
            TestCode = code,
            LanguageVersion = LanguageVersion.CSharp9,
            TestState = { OutputKind = OutputKind.ConsoleApplication },
            Options = { { CSharpCodeStyleOptions.PreferTopLevelStatements, true, NotificationOption2.Suggestion } },
        }.RunAsync();
    }
 
    [Fact]
    public async Task NotOnMultiPartType()
    {
        var code = @"
partial class Program
{
    static void Main(string[] args)
    {
        System.Console.WriteLine(0);
    }
}
 
partial class Program
{
}
";
 
        await new VerifyCS.Test
        {
            TestCode = code,
            LanguageVersion = LanguageVersion.CSharp9,
            TestState = { OutputKind = OutputKind.ConsoleApplication },
            Options = { { CSharpCodeStyleOptions.PreferTopLevelStatements, true, NotificationOption2.Suggestion } },
        }.RunAsync();
    }
 
    [Fact]
    public async Task NotOnPublicType()
    {
        var code = @"
public class Program
{
    static void Main(string[] args)
    {
        System.Console.WriteLine(0);
    }
}
";
 
        await new VerifyCS.Test
        {
            TestCode = code,
            LanguageVersion = LanguageVersion.CSharp9,
            TestState = { OutputKind = OutputKind.ConsoleApplication },
            Options = { { CSharpCodeStyleOptions.PreferTopLevelStatements, true, NotificationOption2.Suggestion } },
        }.RunAsync();
    }
 
    [Fact]
    public async Task NotOnTypeWithAttribute()
    {
        var code = @"
[System.CLSCompliant(true)]
class Program
{
    static void Main(string[] args)
    {
        System.Console.WriteLine(0);
    }
}
";
 
        await new VerifyCS.Test
        {
            TestCode = code,
            LanguageVersion = LanguageVersion.CSharp9,
            TestState = { OutputKind = OutputKind.ConsoleApplication },
            Options = { { CSharpCodeStyleOptions.PreferTopLevelStatements, true, NotificationOption2.Suggestion } },
        }.RunAsync();
    }
 
    [Fact]
    public async Task NotOnTypeWithDocComment()
    {
        var code = @"
/// <summary></summary>
class Program
{
    static void Main(string[] args)
    {
        System.Console.WriteLine(0);
    }
}
";
 
        await new VerifyCS.Test
        {
            TestCode = code,
            LanguageVersion = LanguageVersion.CSharp9,
            TestState = { OutputKind = OutputKind.ConsoleApplication },
            Options = { { CSharpCodeStyleOptions.PreferTopLevelStatements, true, NotificationOption2.Suggestion } },
        }.RunAsync();
    }
 
    [Fact]
    public async Task NotOnTypeWithNormalComment()
    {
        await new VerifyCS.Test
        {
            TestCode = @"
// <summary></summary>
class Program
{
    static void {|IDE0210:Main|}(string[] args)
    {
        System.Console.WriteLine(0);
    }
}
",
            FixedCode = @"
// <summary></summary>
System.Console.WriteLine(0);
",
            LanguageVersion = LanguageVersion.CSharp9,
            TestState = { OutputKind = OutputKind.ConsoleApplication },
            Options = { { CSharpCodeStyleOptions.PreferTopLevelStatements, true, NotificationOption2.Suggestion } },
        }.RunAsync();
    }
 
    [Fact]
    public async Task NotWithMemberWithAttributes()
    {
        var code = @"
class Program
{
    [System.CLSCompliant(true)]
    static int x;
 
    static void Main(string[] args)
    {
        System.Console.WriteLine(0);
    }
}
";
 
        await new VerifyCS.Test
        {
            TestCode = code,
            LanguageVersion = LanguageVersion.CSharp9,
            TestState = { OutputKind = OutputKind.ConsoleApplication },
            Options = { { CSharpCodeStyleOptions.PreferTopLevelStatements, true, NotificationOption2.Suggestion } },
        }.RunAsync();
    }
 
    [Fact]
    public async Task NotWithMethodWithAttribute1()
    {
        var code = @"
class Program
{
    [System.CLSCompliant(true)]
    static void M() { }
 
    static void Main(string[] args)
    {
        System.Console.WriteLine(0);
    }
}
";
 
        await new VerifyCS.Test
        {
            TestCode = code,
            LanguageVersion = LanguageVersion.CSharp9,
            TestState = { OutputKind = OutputKind.ConsoleApplication },
            Options = { { CSharpCodeStyleOptions.PreferTopLevelStatements, true, NotificationOption2.Suggestion } },
        }.RunAsync();
    }
 
    [Fact]
    public async Task NotWithMethodWithAttribute2()
    {
        var code = @"
class Program
{
    static void M() { }
 
    [System.CLSCompliant(true)]
    static void Main(string[] args)
    {
        System.Console.WriteLine(0);
    }
}
";
 
        await new VerifyCS.Test
        {
            TestCode = code,
            LanguageVersion = LanguageVersion.CSharp9,
            TestState = { OutputKind = OutputKind.ConsoleApplication },
            Options = { { CSharpCodeStyleOptions.PreferTopLevelStatements, true, NotificationOption2.Suggestion } },
        }.RunAsync();
    }
 
    [Fact]
    public async Task NotWithMemberWithDocComment()
    {
        var code = @"
class Program
{
    /// <summary></summary>
    static int x;
 
    static void Main(string[] args)
    {
        System.Console.WriteLine(0);
    }
}
";
 
        await new VerifyCS.Test
        {
            TestCode = code,
            LanguageVersion = LanguageVersion.CSharp9,
            TestState = { OutputKind = OutputKind.ConsoleApplication },
            Options = { { CSharpCodeStyleOptions.PreferTopLevelStatements, true, NotificationOption2.Suggestion } },
        }.RunAsync();
    }
 
    [Fact]
    public async Task NotWithNonPrivateMember()
    {
        var code = @"
class Program
{
    public static int x;
 
    static void Main(string[] args)
    {
        System.Console.WriteLine(0);
    }
}
";
 
        await new VerifyCS.Test
        {
            TestCode = code,
            LanguageVersion = LanguageVersion.CSharp9,
            TestState = { OutputKind = OutputKind.ConsoleApplication },
            Options = { { CSharpCodeStyleOptions.PreferTopLevelStatements, true, NotificationOption2.Suggestion } },
        }.RunAsync();
    }
 
    [Fact]
    public async Task NotWithNonStaticMember()
    {
        var code = @"
class Program
{
    int x;
 
    static void Main(string[] args)
    {
        System.Console.WriteLine(0);
    }
}
";
 
        await new VerifyCS.Test
        {
            TestCode = code,
            LanguageVersion = LanguageVersion.CSharp9,
            TestState = { OutputKind = OutputKind.ConsoleApplication },
            Options = { { CSharpCodeStyleOptions.PreferTopLevelStatements, true, NotificationOption2.Suggestion } },
        }.RunAsync();
    }
 
    [Fact]
    public async Task NotWithStaticConstructor()
    {
        var code = @"
class Program
{
    static Program()
    {
    }
 
    static void Main(string[] args)
    {
        System.Console.WriteLine(0);
    }
}
";
 
        await new VerifyCS.Test
        {
            TestCode = code,
            LanguageVersion = LanguageVersion.CSharp9,
            TestState = { OutputKind = OutputKind.ConsoleApplication },
            Options = { { CSharpCodeStyleOptions.PreferTopLevelStatements, true, NotificationOption2.Suggestion } },
        }.RunAsync();
    }
 
    [Fact]
    public async Task NotWithInstanceConstructor()
    {
        var code = @"
class Program
{
    private Program()
    {
    }
 
    static void Main(string[] args)
    {
        System.Console.WriteLine(0);
    }
}
";
 
        await new VerifyCS.Test
        {
            TestCode = code,
            LanguageVersion = LanguageVersion.CSharp9,
            TestState = { OutputKind = OutputKind.ConsoleApplication },
            Options = { { CSharpCodeStyleOptions.PreferTopLevelStatements, true, NotificationOption2.Suggestion } },
        }.RunAsync();
    }
 
    [Fact]
    public async Task NotWithProperty()
    {
        var code = @"
class Program
{
    private int X { get; }
 
    static void Main(string[] args)
    {
        System.Console.WriteLine(0);
    }
}
";
 
        await new VerifyCS.Test
        {
            TestCode = code,
            LanguageVersion = LanguageVersion.CSharp9,
            TestState = { OutputKind = OutputKind.ConsoleApplication },
            Options = { { CSharpCodeStyleOptions.PreferTopLevelStatements, true, NotificationOption2.Suggestion } },
        }.RunAsync();
    }
 
    [Fact]
    public async Task NotWithEvent()
    {
        var code = @"
class Program
{
    private event System.Action X;
 
    static void Main(string[] args)
    {
        System.Console.WriteLine(0);
    }
}
";
 
        await new VerifyCS.Test
        {
            TestCode = code,
            LanguageVersion = LanguageVersion.CSharp9,
            TestState = { OutputKind = OutputKind.ConsoleApplication },
            Options = { { CSharpCodeStyleOptions.PreferTopLevelStatements, true, NotificationOption2.Suggestion } },
        }.RunAsync();
    }
 
    [Fact]
    public async Task NotWithOperator()
    {
        var code = @"
class Program
{
    public static Program operator+(Program p1, Program p2) => null;
 
    static void Main(string[] args)
    {
        System.Console.WriteLine(0);
    }
}
";
 
        await new VerifyCS.Test
        {
            TestCode = code,
            LanguageVersion = LanguageVersion.CSharp9,
            TestState = { OutputKind = OutputKind.ConsoleApplication },
            Options = { { CSharpCodeStyleOptions.PreferTopLevelStatements, true, NotificationOption2.Suggestion } },
        }.RunAsync();
    }
 
    [Fact]
    public async Task NotWithMethodWithWrongArgsName()
    {
        var code = @"
class Program
{
    static void Main(string[] args1)
    {
        System.Console.WriteLine(0);
    }
}
";
 
        await new VerifyCS.Test
        {
            TestCode = code,
            LanguageVersion = LanguageVersion.CSharp9,
            TestState = { OutputKind = OutputKind.ConsoleApplication },
            Options = { { CSharpCodeStyleOptions.PreferTopLevelStatements, true, NotificationOption2.Suggestion } },
        }.RunAsync();
    }
 
    [Fact]
    public async Task TestFieldWithNoAccessibility()
    {
        await new VerifyCS.Test
        {
            TestCode = @"
class Program
{
    static int x;
 
    static void {|IDE0210:Main|}(string[] args)
    {
        System.Console.WriteLine(0);
    }
}
",
            FixedCode = @"
int x = 0;
 
System.Console.WriteLine(0);
",
            LanguageVersion = LanguageVersion.CSharp9,
            TestState = { OutputKind = OutputKind.ConsoleApplication },
            Options = { { CSharpCodeStyleOptions.PreferTopLevelStatements, true, NotificationOption2.Suggestion } },
        }.RunAsync();
    }
 
    [Fact]
    public async Task TestFollowingField()
    {
        await new VerifyCS.Test
        {
            TestCode = @"
class Program
{
    static void {|IDE0210:Main|}(string[] args)
    {
        System.Console.WriteLine(0);
    }
 
    static int x;
}
",
            FixedCode = @"
 
int x = 0;
System.Console.WriteLine(0);
",
            LanguageVersion = LanguageVersion.CSharp9,
            TestState = { OutputKind = OutputKind.ConsoleApplication },
            Options = { { CSharpCodeStyleOptions.PreferTopLevelStatements, true, NotificationOption2.Suggestion } },
        }.RunAsync();
    }
 
    [Fact]
    public async Task TestFieldWithPrivateAccessibility()
    {
        await new VerifyCS.Test
        {
            TestCode = @"
class Program
{
    private static int x;
 
    static void {|IDE0210:Main|}(string[] args)
    {
        System.Console.WriteLine(0);
    }
}
",
            FixedCode = @"
int x = 0;
 
System.Console.WriteLine(0);
",
            LanguageVersion = LanguageVersion.CSharp9,
            TestState = { OutputKind = OutputKind.ConsoleApplication },
            Options = { { CSharpCodeStyleOptions.PreferTopLevelStatements, true, NotificationOption2.Suggestion } },
        }.RunAsync();
    }
 
    [Fact]
    public async Task TestFieldWithMultipleDeclarators()
    {
        await new VerifyCS.Test
        {
            TestCode = @"
class Program
{
    private static int x, y;
 
    static void {|IDE0210:Main|}(string[] args)
    {
        System.Console.WriteLine(0);
    }
}
",
            FixedCode = @"
int x = 0, y = 0;
 
System.Console.WriteLine(0);
",
            LanguageVersion = LanguageVersion.CSharp9,
            TestState = { OutputKind = OutputKind.ConsoleApplication },
            Options = { { CSharpCodeStyleOptions.PreferTopLevelStatements, true, NotificationOption2.Suggestion } },
        }.RunAsync();
    }
 
    [Fact]
    public async Task TestFieldWithInitializer()
    {
        await new VerifyCS.Test
        {
            TestCode = @"
class Program
{
    private static int x = 1;
 
    static void {|IDE0210:Main|}(string[] args)
    {
        System.Console.WriteLine(0);
    }
}
",
            FixedCode = @"
int x = 1;
 
System.Console.WriteLine(0);
",
            LanguageVersion = LanguageVersion.CSharp9,
            TestState = { OutputKind = OutputKind.ConsoleApplication },
            Options = { { CSharpCodeStyleOptions.PreferTopLevelStatements, true, NotificationOption2.Suggestion } },
        }.RunAsync();
    }
 
    [Fact]
    public async Task TestReferenceField()
    {
        await new VerifyCS.Test
        {
            TestCode = @"
class Program
{
    private static string x;
 
    static void {|IDE0210:Main|}(string[] args)
    {
        System.Console.WriteLine(0);
    }
}
",
            FixedCode = @"
string x = null;
 
System.Console.WriteLine(0);
",
            LanguageVersion = LanguageVersion.CSharp9,
            TestState = { OutputKind = OutputKind.ConsoleApplication },
            Options = { { CSharpCodeStyleOptions.PreferTopLevelStatements, true, NotificationOption2.Suggestion } },
        }.RunAsync();
    }
 
    [Fact]
    public async Task TestBooleanField()
    {
        await new VerifyCS.Test
        {
            TestCode = @"
class Program
{
    private static bool x;
 
    static void {|IDE0210:Main|}(string[] args)
    {
        System.Console.WriteLine(0);
    }
}
",
            FixedCode = @"
bool x = false;
 
System.Console.WriteLine(0);
",
            LanguageVersion = LanguageVersion.CSharp9,
            TestState = { OutputKind = OutputKind.ConsoleApplication },
            Options = { { CSharpCodeStyleOptions.PreferTopLevelStatements, true, NotificationOption2.Suggestion } },
        }.RunAsync();
    }
 
    [Fact]
    public async Task TestStructField()
    {
        await new VerifyCS.Test
        {
            TestCode = @"
class Program
{
    private static System.DateTime x;
 
    static void {|IDE0210:Main|}(string[] args)
    {
        System.Console.WriteLine(0);
    }
}
",
            FixedCode = @"
System.DateTime x = default;
 
System.Console.WriteLine(0);
",
            LanguageVersion = LanguageVersion.CSharp9,
            TestState = { OutputKind = OutputKind.ConsoleApplication },
            Options = { { CSharpCodeStyleOptions.PreferTopLevelStatements, true, NotificationOption2.Suggestion } },
        }.RunAsync();
    }
 
    [Fact]
    public async Task TestFieldWithComments()
    {
        await new VerifyCS.Test
        {
            TestCode = @"
class Program
{
    // Leading
    private static int x = 0; // Trailing
 
    static void {|IDE0210:Main|}(string[] args)
    {
        System.Console.WriteLine(0);
    }
}
",
            FixedCode = @"
// Leading
int x = 0; // Trailing
 
System.Console.WriteLine(0);
",
            LanguageVersion = LanguageVersion.CSharp9,
            TestState = { OutputKind = OutputKind.ConsoleApplication },
            Options = { { CSharpCodeStyleOptions.PreferTopLevelStatements, true, NotificationOption2.Suggestion } },
        }.RunAsync();
    }
 
    [Fact]
    public async Task TestEmptyMethod()
    {
        await new VerifyCS.Test
        {
            TestCode = @"
class Program
{
    private static int x = 0;
 
    static void {|IDE0210:Main|}(string[] args)
    {
    }
}
",
            FixedCode = @"
int x = 0;
",
            LanguageVersion = LanguageVersion.CSharp9,
            TestState = { OutputKind = OutputKind.ConsoleApplication },
            Options = { { CSharpCodeStyleOptions.PreferTopLevelStatements, true, NotificationOption2.Suggestion } },
        }.RunAsync();
    }
 
    [Fact]
    public async Task TestMultipleStatements()
    {
        await new VerifyCS.Test
        {
            TestCode = @"
class Program
{
    private static int x = 0;
 
    static void {|IDE0210:Main|}(string[] args)
    {
        System.Console.WriteLine(args);
        return;
    }
}
",
            FixedCode = @"
int x = 0;
 
System.Console.WriteLine(args);
return;
",
            LanguageVersion = LanguageVersion.CSharp9,
            TestState = { OutputKind = OutputKind.ConsoleApplication },
            Options = { { CSharpCodeStyleOptions.PreferTopLevelStatements, true, NotificationOption2.Suggestion } },
        }.RunAsync();
    }
 
    [Fact]
    public async Task TestOtherMethodBecomesLocalFunction()
    {
        await new VerifyCS.Test
        {
            TestCode = @"
class Program
{
    private static int x = 0;
 
    static void OtherMethod()
    {
        return;
    }
 
    static void {|IDE0210:Main|}(string[] args)
    {
        System.Console.WriteLine(args);
    }
}
",
            FixedCode = @"
int x = 0;
 
void OtherMethod()
{
    return;
}
 
System.Console.WriteLine(args);
",
            LanguageVersion = LanguageVersion.CSharp9,
            TestState = { OutputKind = OutputKind.ConsoleApplication },
            Options = { { CSharpCodeStyleOptions.PreferTopLevelStatements, true, NotificationOption2.Suggestion } },
        }.RunAsync();
    }
 
    [Fact]
    public async Task TestWithUnsafeMethod()
    {
        await new VerifyCS.Test
        {
            TestCode = @"
class Program
{
    private static int x = 0;
 
    unsafe static void OtherMethod()
    {
        return;
    }
 
    static void {|IDE0210:Main|}(string[] args)
    {
        System.Console.WriteLine(args);
    }
}
",
            FixedCode = @"
int x = 0;
 
unsafe void OtherMethod()
{
    return;
}
 
System.Console.WriteLine(args);
",
            LanguageVersion = LanguageVersion.CSharp9,
            TestState = { OutputKind = OutputKind.ConsoleApplication },
            Options = { { CSharpCodeStyleOptions.PreferTopLevelStatements, true, NotificationOption2.Suggestion } },
        }.RunAsync();
    }
 
    [Fact]
    public async Task TestOtherComplexMethodBecomesLocalFunction()
    {
        await new VerifyCS.Test
        {
            TestCode = @"
using System.Threading.Tasks;
 
class Program
{
    private static int x = 0;
 
    static async Task OtherMethod<T>(T param) where T : struct
    {
        return;
    }
 
    static void {|IDE0210:Main|}(string[] args)
    {
        System.Console.WriteLine(args);
    }
}
",
            FixedCode = @"
using System.Threading.Tasks;
 
int x = 0;
 
async Task OtherMethod<T>(T param) where T : struct
{
    return;
}
 
System.Console.WriteLine(args);
",
            LanguageVersion = LanguageVersion.CSharp9,
            TestState = { OutputKind = OutputKind.ConsoleApplication },
            Options = { { CSharpCodeStyleOptions.PreferTopLevelStatements, true, NotificationOption2.Suggestion } },
        }.RunAsync();
    }
 
    [Fact]
    public async Task TestAwaitExpression()
    {
        await new VerifyCS.Test
        {
            TestCode = @"
using System.Threading.Tasks;
 
class Program
{
    static async Task {|IDE0210:Main|}(string[] args)
    {
        await Task.CompletedTask;
    }
}
",
            FixedCode = @"
using System.Threading.Tasks;
 
await Task.CompletedTask;
",
            LanguageVersion = LanguageVersion.CSharp9,
            TestState = { OutputKind = OutputKind.ConsoleApplication },
            Options = { { CSharpCodeStyleOptions.PreferTopLevelStatements, true, NotificationOption2.Suggestion } },
        }.RunAsync();
    }
 
    [Fact]
    public async Task TestInNamespaceWithOtherType()
    {
        await new VerifyCS.Test
        {
            TestCode = @"
using System.Threading.Tasks;
 
namespace X.Y
{
    class Program
    {
        static async Task {|IDE0210:Main|}(string[] args)
        {
            await Task.CompletedTask;
        }
    }
 
    class Other
    {
    }
}
",
            FixedCode = @"
using System.Threading.Tasks;
 
await Task.CompletedTask;
 
namespace X.Y
{
    class Other
    {
    }
}
",
            LanguageVersion = LanguageVersion.CSharp9,
            TestState = { OutputKind = OutputKind.ConsoleApplication },
            Options = { { CSharpCodeStyleOptions.PreferTopLevelStatements, true, NotificationOption2.Suggestion } },
        }.RunAsync();
    }
 
    [Theory]
    [MemberData(nameof(EndOfDocumentSequences))]
    public async Task TestInTopLevelNamespaceWithOtherType(string endOfDocumentSequence)
    {
        await new VerifyCS.Test
        {
            TestCode = $@"
using System.Threading.Tasks;
 
namespace X.Y;
 
class Program
{{
    static async Task {{|IDE0210:Main|}}(string[] args)
    {{
        await Task.CompletedTask;
    }}
}}
 
class Other
{{
}}{endOfDocumentSequence}",
            FixedCode = $@"
using System.Threading.Tasks;
 
await Task.CompletedTask;
 
namespace X.Y
{{
    class Other
    {{
    }}
}}{endOfDocumentSequence}",
            LanguageVersion = LanguageVersion.CSharp10,
            TestState = { OutputKind = OutputKind.ConsoleApplication },
            Options = { { CSharpCodeStyleOptions.PreferTopLevelStatements, true, NotificationOption2.Suggestion } },
        }.RunAsync();
    }
 
    [Fact]
    public async Task TestInNamespaceWithOtherTypeThatIsReferenced()
    {
        await new VerifyCS.Test
        {
            TestCode = @"
using System.Threading.Tasks;
 
namespace X.Y
{
    class Program
    {
        static void {|IDE0210:Main|}(string[] args)
        {
            System.Console.WriteLine(typeof(Other));
        }
    }
 
    class Other
    {
    }
}
",
            FixedCode = @"
using System.Threading.Tasks;
using X.Y;
 
System.Console.WriteLine(typeof(Other));
 
namespace X.Y
{
    class Other
    {
    }
}
",
            LanguageVersion = LanguageVersion.CSharp9,
            TestState = { OutputKind = OutputKind.ConsoleApplication },
            Options = { { CSharpCodeStyleOptions.PreferTopLevelStatements, true, NotificationOption2.Suggestion } },
        }.RunAsync();
    }
 
    [Theory]
    [MemberData(nameof(EndOfDocumentSequences))]
    public async Task TestInTopLevelNamespaceWithOtherTypeThatIsReferenced(string endOfDocumentSequence)
    {
        await new VerifyCS.Test
        {
            TestCode = $@"
using System.Threading.Tasks;
 
namespace X.Y;
 
class Program
{{
    static void {{|IDE0210:Main|}}(string[] args)
    {{
        System.Console.WriteLine(typeof(Other));
    }}
}}
 
class Other
{{
}}{endOfDocumentSequence}",
            FixedCode = $@"
using System.Threading.Tasks;
using X.Y;
 
System.Console.WriteLine(typeof(Other));
 
namespace X.Y
{{
    class Other
    {{
    }}
}}{endOfDocumentSequence}",
            LanguageVersion = LanguageVersion.CSharp10,
            TestState = { OutputKind = OutputKind.ConsoleApplication },
            Options = { { CSharpCodeStyleOptions.PreferTopLevelStatements, true, NotificationOption2.Suggestion } },
        }.RunAsync();
    }
 
    [Fact]
    public async Task TestInNamespaceWithNoOtherTypes()
    {
        await new VerifyCS.Test
        {
            TestCode = @"
using System.Threading.Tasks;
 
namespace X.Y
{
    class Program
    {
        static void {|IDE0210:Main|}(string[] args)
        {
            System.Console.WriteLine();
        }
    }
}
",
            FixedCode = @"
using System.Threading.Tasks;
 
System.Console.WriteLine();
",
            LanguageVersion = LanguageVersion.CSharp9,
            TestState = { OutputKind = OutputKind.ConsoleApplication },
            Options = { { CSharpCodeStyleOptions.PreferTopLevelStatements, true, NotificationOption2.Suggestion } },
        }.RunAsync();
    }
 
    [Fact]
    public async Task TestInTopLevelNamespaceWithNoOtherTypes()
    {
        await new VerifyCS.Test
        {
            TestCode = @"
using System.Threading.Tasks;
 
namespace X.Y;
 
class Program
{
    static void {|IDE0210:Main|}(string[] args)
    {
        System.Console.WriteLine();
    }
}
",
            FixedCode = @"
using System.Threading.Tasks;
 
System.Console.WriteLine();
",
            LanguageVersion = LanguageVersion.CSharp10,
            TestState = { OutputKind = OutputKind.ConsoleApplication },
            Options = { { CSharpCodeStyleOptions.PreferTopLevelStatements, true, NotificationOption2.Suggestion } },
        }.RunAsync();
    }
 
    [Fact]
    public async Task TestInSingletonNamespaceWithOtherTypeThatIsReferenced()
    {
        await new VerifyCS.Test
        {
            TestCode = @"
using System.Threading.Tasks;
 
namespace X.Y
{
    class Program
    {
        static void {|IDE0210:Main|}(string[] args)
        {
            System.Console.WriteLine(typeof(Other));
        }
    }
}
 
namespace X
{
    class Other
    {
    }
}
",
            FixedCode = @"
using System.Threading.Tasks;
using X;
 
System.Console.WriteLine(typeof(Other));
 
namespace X
{
    class Other
    {
    }
}
",
            LanguageVersion = LanguageVersion.CSharp9,
            TestState = { OutputKind = OutputKind.ConsoleApplication },
            Options = { { CSharpCodeStyleOptions.PreferTopLevelStatements, true, NotificationOption2.Suggestion } },
        }.RunAsync();
    }
}
File: ConvertProgram\ConvertToTopLevelStatementsAnalyzerTests.cs	Web Access
Project: src\src\Features\CSharpTest\Microsoft.CodeAnalysis.CSharp.Features.UnitTests.csproj (Microsoft.CodeAnalysis.CSharp.Features.UnitTests)