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// 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.Threading.Tasks;
using Microsoft.CodeAnalysis.CodeStyle;
using Microsoft.CodeAnalysis.CSharp;
using Microsoft.CodeAnalysis.CSharp.CodeStyle;
using Microsoft.CodeAnalysis.CSharp.ConvertProgram;
using Microsoft.CodeAnalysis.Editor.UnitTests.CodeActions;
using Microsoft.CodeAnalysis.Test.Utilities;
using Microsoft.CodeAnalysis.Testing;
using Roslyn.Test.Utilities;
using Xunit;
namespace Microsoft.CodeAnalysis.Editor.CSharp.UnitTests.ConvertProgram;
using VerifyCS = CSharpCodeRefactoringVerifier<ConvertToTopLevelStatementsCodeRefactoringProvider>;
[UseExportProvider]
public sealed class ConvertToTopLevelStatementsRefactoringTests
{
[Fact]
public async Task TestNotOnEmptyFile()
{
var code = """
$$
""";
// default preference is to prefer top level namespaces. As such, we should not have the refactoring here
// since the analyzer will take over.
await new VerifyCS.Test
{
TestCode = code,
LanguageVersion = LanguageVersion.CSharp10,
TestState = { OutputKind = OutputKind.ConsoleApplication },
ExpectedDiagnostics =
{
// error CS5001: Program does not contain a static 'Main' method suitable for an entry point
DiagnosticResult.CompilerError("CS5001"),
}
}.RunAsync();
}
[Fact]
public async Task TestConvertToTopLevelStatementsWithDefaultTopLevelStatementPreference()
{
var code = """
class Program
{
static void $$Main(string[] args)
{
System.Console.WriteLine(args[0]);
}
}
""";
// default preference is to prefer top level namespaces. As such, we should not have the refactoring here
// since the analyzer will take over.
await new VerifyCS.Test
{
TestCode = code,
LanguageVersion = LanguageVersion.CSharp10,
TestState = { OutputKind = OutputKind.ConsoleApplication },
}.RunAsync();
}
[Fact]
public async Task TestConvertToTopLevelStatementsWithProgramMainPreferenceSuggestion()
{
// user actually prefers Program.Main. As such, we only offer to convert to the alternative as a refactoring.
await new VerifyCS.Test
{
TestCode = """
class Program
{
static void $$Main(string[] args)
{
System.Console.WriteLine(args[0]);
}
}
""",
FixedCode = """
System.Console.WriteLine(args[0]);
""",
LanguageVersion = LanguageVersion.CSharp10,
TestState = { OutputKind = OutputKind.ConsoleApplication },
Options =
{
{ CSharpCodeStyleOptions.PreferTopLevelStatements, false, NotificationOption2.Suggestion },
}
}.RunAsync();
}
[Fact]
public async Task TestNotOfferedInLibrary()
{
var code = """
class Program
{
static void $$Main(string[] args)
{
System.Console.WriteLine(args[0]);
}
}
""";
await new VerifyCS.Test
{
TestCode = code,
LanguageVersion = LanguageVersion.CSharp10,
Options =
{
{ CSharpCodeStyleOptions.PreferTopLevelStatements, false, NotificationOption2.Suggestion },
}
}.RunAsync();
}
[Fact]
public async Task TestNotWithNonViableType()
{
var code = """
class Program
{
void $$Main(string[] args)
{
System.Console.WriteLine(args[0]);
}
}
""";
await new VerifyCS.Test
{
TestCode = code,
LanguageVersion = LanguageVersion.CSharp10,
TestState = { OutputKind = OutputKind.ConsoleApplication },
Options =
{
{ CSharpCodeStyleOptions.PreferTopLevelStatements, false, NotificationOption2.Suggestion },
},
ExpectedDiagnostics =
{
// error CS5001: Program does not contain a static 'Main' method suitable for an entry point
DiagnosticResult.CompilerError("CS5001"),
}
}.RunAsync();
}
[Fact]
public async Task TestNoConvertToTopLevelStatementsWithProgramMainPreferenceSuggestionBeforeCSharp9()
{
var code = """
class Program
{
static void $$Main(string[] args)
{
System.Console.WriteLine(args[0]);
}
}
""";
// user actually prefers Program.Main. As such, we only offer to convert to the alternative as a refactoring.
await new VerifyCS.Test
{
TestCode = code,
LanguageVersion = LanguageVersion.CSharp8,
TestState = { OutputKind = OutputKind.ConsoleApplication },
Options =
{
{ CSharpCodeStyleOptions.PreferTopLevelStatements, false, NotificationOption2.Suggestion },
}
}.RunAsync();
}
[Fact]
public async Task TestNoConvertToTopLevelStatementsWithTopLevelStatementsPreferenceSuggestion()
{
var code = """
class Program
{
static void $$Main(string[] args)
{
System.Console.WriteLine(args[0]);
}
}
""";
await new VerifyCS.Test
{
TestCode = code,
LanguageVersion = LanguageVersion.CSharp10,
TestState = { OutputKind = OutputKind.ConsoleApplication },
Options =
{
{ CSharpCodeStyleOptions.PreferTopLevelStatements, true, NotificationOption2.Suggestion },
}
}.RunAsync();
}
[Fact]
public async Task TestNoConvertToTopLevelStatementsWithTopLevelStatementsPreferenceSilent()
{
var code = """
class Program
{
static void $$Main(string[] args)
{
System.Console.WriteLine(args[0]);
}
}
""";
await new VerifyCS.Test
{
TestCode = code,
LanguageVersion = LanguageVersion.CSharp10,
TestState = { OutputKind = OutputKind.ConsoleApplication },
Options =
{
{ CSharpCodeStyleOptions.PreferTopLevelStatements, true, NotificationOption2.Silent },
}
}.RunAsync();
}
[Fact]
public async Task TestConvertToTopLevelStatementWithTopLevelStatementPreferenceSuppress()
{
// if the user has the analyzer suppressed, then we want to supply teh refactoring.
await new VerifyCS.Test
{
TestCode = """
internal class Program
{
private static void $$Main(string[] args)
{
System.Console.WriteLine(0);
}
}
""",
FixedCode = """
System.Console.WriteLine(0);
""",
LanguageVersion = LanguageVersion.CSharp10,
TestState = { OutputKind = OutputKind.ConsoleApplication },
Options =
{
{ CSharpCodeStyleOptions.PreferTopLevelStatements, true, NotificationOption2.None },
}
}.RunAsync();
}
[Fact, WorkItem("https://github.com/dotnet/roslyn/issues/78002")]
public async Task TestPreserveStatementDirectives1()
{
await new VerifyCS.Test
{
TestCode = """
using System;
class Program
{
static void $$Main(string[] args)
{
#if true
Console.WriteLine("true");
#else
Console.WriteLine("false");
#endif
}
}
""",
FixedCode = """
using System;
#if true
Console.WriteLine("true");
#else
Console.WriteLine("false");
#endif
""",
LanguageVersion = LanguageVersion.CSharp10,
TestState = { OutputKind = OutputKind.ConsoleApplication },
Options =
{
{ CSharpCodeStyleOptions.PreferTopLevelStatements, false, NotificationOption2.Suggestion },
}
}.RunAsync();
}
[Fact, WorkItem("https://github.com/dotnet/roslyn/issues/78002")]
public async Task TestPreserveStatementDirectives2()
{
await new VerifyCS.Test
{
TestCode = """
using System;
class Program
{
static void $$Main(string[] args)
{
#if true
Console.WriteLine("true");
#else
Console.WriteLine("false");
#endif
}
}
class Next
{
}
""",
FixedCode = """
using System;
#if true
Console.WriteLine("true");
#else
Console.WriteLine("false");
#endif
class Next
{
}
""",
LanguageVersion = LanguageVersion.CSharp10,
TestState = { OutputKind = OutputKind.ConsoleApplication },
Options =
{
{ CSharpCodeStyleOptions.PreferTopLevelStatements, false, NotificationOption2.Suggestion },
}
}.RunAsync();
}
[Fact, WorkItem("https://github.com/dotnet/roslyn/issues/78002")]
public async Task TestPreserveStatementDirectives3()
{
await new VerifyCS.Test
{
TestCode = """
using System;
namespace N
{
class Program
{
static void $$Main(string[] args)
{
#if true
Console.WriteLine("true");
#else
Console.WriteLine("false");
#endif
}
}
}
""",
FixedCode = """
using System;
#if true
Console.WriteLine("true");
#else
Console.WriteLine("false");
#endif
""",
LanguageVersion = LanguageVersion.CSharp10,
TestState = { OutputKind = OutputKind.ConsoleApplication },
Options =
{
{ CSharpCodeStyleOptions.PreferTopLevelStatements, false, NotificationOption2.Suggestion },
}
}.RunAsync();
}
[Fact, WorkItem("https://github.com/dotnet/roslyn/issues/78002")]
public async Task TestPreserveStatementDirectives4()
{
await new VerifyCS.Test
{
TestCode = """
using System;
namespace N
{
class Program
{
static void $$Main(string[] args)
{
#if true
Console.WriteLine("true");
#else
Console.WriteLine("false");
#endif
}
}
class Next
{
}
}
""",
FixedCode = """
using System;
#if true
Console.WriteLine("true");
#else
Console.WriteLine("false");
#endif
namespace N
{
class Next
{
}
}
""",
LanguageVersion = LanguageVersion.CSharp10,
TestState = { OutputKind = OutputKind.ConsoleApplication },
Options =
{
{ CSharpCodeStyleOptions.PreferTopLevelStatements, false, NotificationOption2.Suggestion },
}
}.RunAsync();
}
}
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