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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.
#nullable disable
using System;
using System.Collections.Generic;
using System.Collections.Immutable;
using System.Linq;
using System.Threading;
using System.Threading.Tasks;
using Microsoft.CodeAnalysis.AddImport;
using Microsoft.CodeAnalysis.CodeActions;
using Microsoft.CodeAnalysis.CodeCleanup;
using Microsoft.CodeAnalysis.CodeFixes;
using Microsoft.CodeAnalysis.CodeStyle;
using Microsoft.CodeAnalysis.CSharp.CodeStyle;
using Microsoft.CodeAnalysis.CSharp.UseExpressionBody;
using Microsoft.CodeAnalysis.Diagnostics;
using Microsoft.CodeAnalysis.Diagnostics.CSharp;
using Microsoft.CodeAnalysis.Editing;
using Microsoft.CodeAnalysis.Editor.UnitTests;
using Microsoft.CodeAnalysis.Editor.UnitTests.CodeActions;
using Microsoft.CodeAnalysis.Options;
using Microsoft.CodeAnalysis.Shared.Extensions;
using Microsoft.CodeAnalysis.Test.Utilities;
using Microsoft.CodeAnalysis.Text;
using Microsoft.CodeAnalysis.UnitTests.Diagnostics;
using Roslyn.Test.Utilities;
using Xunit;
namespace Microsoft.CodeAnalysis.Editor.CSharp.UnitTests.Formatting;
[UseExportProvider]
[Trait(Traits.Feature, Traits.Features.CodeCleanup)]
public partial class CodeCleanupTests
{
[Fact]
public Task RemoveUsings()
{
var code = """
using System;
using System.Collections.Generic;
class Program
{
static void Main(string[] args)
{
Console.WriteLine();
}
}
""";
var expected = """
using System;
internal class Program
{
private static void Main(string[] args)
{
Console.WriteLine();
}
}
""";
return AssertCodeCleanupResult(expected, code);
}
[Fact]
public Task SortUsings()
{
var code = """
using System.Collections.Generic;
using System;
class Program
{
static void Main(string[] args)
{
var list = new List<int>();
Console.WriteLine(list.Count);
}
}
""";
var expected = """
using System;
using System.Collections.Generic;
internal class Program
{
private static void Main(string[] args)
{
List<int> list = new();
Console.WriteLine(list.Count);
}
}
""";
return AssertCodeCleanupResult(expected, code);
}
[Fact]
public Task SortGlobalUsings()
{
var code = """
using System.Threading.Tasks;
using System.Threading;
global using System.Collections.Generic;
global using System;
class Program
{
static Task Main(string[] args)
{
Barrier b = new Barrier(0);
var list = new List<int>();
Console.WriteLine(list.Count);
b.Dispose();
}
}
""";
var expected = """
global using System;
global using System.Collections.Generic;
using System.Threading;
using System.Threading.Tasks;
internal class Program
{
private static Task Main(string[] args)
{
Barrier b = new(0);
List<int> list = new();
Console.WriteLine(list.Count);
b.Dispose();
}
}
""";
return AssertCodeCleanupResult(expected, code);
}
[Fact, WorkItem("https://github.com/dotnet/roslyn/issues/36984")]
public Task GroupUsings()
{
var code = """
using M;
using System;
internal class Program
{
private static void Main(string[] args)
{
Console.WriteLine("Hello World!");
new Goo();
}
}
namespace M
{
public class Goo { }
}
""";
var expected = """
using M;
using System;
internal class Program
{
private static void Main(string[] args)
{
Console.WriteLine("Hello World!");
_ = new Goo();
}
}
namespace M
{
public class Goo { }
}
""";
return AssertCodeCleanupResult(expected, code, systemUsingsFirst: false, separateUsingGroups: true);
}
[Fact, WorkItem("https://github.com/dotnet/roslyn/issues/36984")]
public Task SortAndGroupUsings()
{
var code = """
using M;
using System;
internal class Program
{
private static void Main(string[] args)
{
Console.WriteLine("Hello World!");
new Goo();
}
}
namespace M
{
public class Goo { }
}
""";
var expected = """
using System;
using M;
internal class Program
{
private static void Main(string[] args)
{
Console.WriteLine("Hello World!");
_ = new Goo();
}
}
namespace M
{
public class Goo { }
}
""";
return AssertCodeCleanupResult(expected, code, systemUsingsFirst: true, separateUsingGroups: true);
}
[Fact]
public Task FixAddRemoveBraces()
{
var code = """
class Program
{
int Method()
{
int a = 0;
if (a > 0)
a ++;
return a;
}
}
""";
var expected = """
internal class Program
{
private int Method()
{
int a = 0;
if (a > 0)
{
a++;
}
return a;
}
}
""";
return AssertCodeCleanupResult(expected, code);
}
[Fact]
public Task RemoveUnusedVariable()
{
var code = """
class Program
{
void Method()
{
int a;
}
}
""";
var expected = """
internal class Program
{
private void Method()
{
}
}
""";
return AssertCodeCleanupResult(expected, code);
}
[Fact]
public Task FixAccessibilityModifiers()
{
var code = """
class Program
{
void Method()
{
int a;
}
}
""";
var expected = """
internal class Program
{
private void Method()
{
}
}
""";
return AssertCodeCleanupResult(expected, code);
}
[Fact]
public Task FixUsingPlacementPreferOutside()
{
var code = """
namespace A
{
using System;
internal class Program
{
private void Method()
{
Console.WriteLine();
}
}
}
""";
var expected = """
using System;
namespace A
{
internal class Program
{
private void Method()
{
Console.WriteLine();
}
}
}
""";
return AssertCodeCleanupResult(expected, code);
}
[Fact]
public Task FixUsingPlacementPreferInside()
{
var code = """
using System;
namespace A
{
internal class Program
{
private void Method()
{
Console.WriteLine();
}
}
}
""";
var expected = """
namespace A
{
using System;
internal class Program
{
private void Method()
{
Console.WriteLine();
}
}
}
""";
return AssertCodeCleanupResult(expected, code, InsideNamespaceOption);
}
[Fact]
public Task FixUsingPlacementPreferInsidePreserve()
{
var code = """
using System;
namespace A
{
internal class Program
{
private void Method()
{
Console.WriteLine();
}
}
}
""";
var expected = code;
return AssertCodeCleanupResult(expected, code, InsidePreferPreservationOption);
}
[Fact]
public Task FixUsingPlacementPreferOutsidePreserve()
{
var code = """
namespace A
{
using System;
internal class Program
{
private void Method()
{
Console.WriteLine();
}
}
}
""";
var expected = code;
return AssertCodeCleanupResult(expected, code, OutsidePreferPreservationOption);
}
[Fact]
public Task FixUsingPlacementMixedPreferOutside()
{
var code = """
using System;
namespace A
{
using System.Collections.Generic;
internal class Program
{
private void Method()
{
Console.WriteLine();
List<int> list = new List<int>();
Console.WriteLine(list.Length);
}
}
}
""";
var expected = """
using System;
using System.Collections.Generic;
namespace A
{
internal class Program
{
private void Method()
{
Console.WriteLine();
List<int> list = [];
Console.WriteLine(list.Length);
}
}
}
""";
return AssertCodeCleanupResult(expected, code, OutsideNamespaceOption);
}
[Fact]
public Task FixUsingPlacementMixedPreferInside()
{
var code = """
using System;
namespace A
{
using System.Collections.Generic;
internal class Program
{
private void Method()
{
Console.WriteLine();
List<int> list = new();
Console.WriteLine(list.Length);
}
}
}
""";
var expected = """
namespace A
{
using System;
using System.Collections.Generic;
internal class Program
{
private void Method()
{
Console.WriteLine();
List<int> list = [];
Console.WriteLine(list.Length);
}
}
}
""";
return AssertCodeCleanupResult(expected, code, InsideNamespaceOption);
}
[Fact]
public Task FixUsingPlacementMixedPreferInsidePreserve()
{
var code = """
using System;
namespace A
{
using System.Collections.Generic;
internal class Program
{
private void Method()
{
Console.WriteLine();
List<int> list = [];
Console.WriteLine(list.Length);
}
}
}
""";
var expected = code;
return AssertCodeCleanupResult(expected, code, InsidePreferPreservationOption);
}
[Fact]
public Task FixUsingPlacementMixedPreferOutsidePreserve()
{
var code = """
using System;
namespace A
{
using System.Collections.Generic;
internal class Program
{
private void Method()
{
Console.WriteLine();
List<int> list = [];
Console.WriteLine(list.Length);
}
}
}
""";
var expected = code;
return AssertCodeCleanupResult(expected, code, OutsidePreferPreservationOption);
}
[Theory, WorkItem("https://github.com/dotnet/roslyn/issues/70187")]
[CombinatorialData]
public Task FixAllWarningsAndErrorsWithCustomFixIdsExplicitlyEnabled(
bool applyAllAnalyzerFixersId,
bool explicitlyIncludeCompilerId,
[CombinatorialValues(DiagnosticSeverity.Warning, DiagnosticSeverity.Info)] DiagnosticSeverity severity)
{
var code = """
namespace A
{
internal class Program
{
private void Method()
{
int a = 42; // CS0219: The variable 'a' is assigned but its value is never used.
}
}
}
""";
var expectedCleanup = false;
if (explicitlyIncludeCompilerId)
{
expectedCleanup = true;
}
else if (applyAllAnalyzerFixersId)
{
expectedCleanup = severity >= DiagnosticSeverity.Warning;
}
var expected = code;
if (expectedCleanup)
{
expected = """
namespace A
{
internal class Program
{
private void Method()
{
}
}
}
""";
}
Func<string, bool> enabledFixIdsFilter = id =>
id switch
{
"CS0219" => explicitlyIncludeCompilerId,
"ApplyAllAnalyzerFixersId" => applyAllAnalyzerFixersId,
_ => false
};
var diagnosticIdsWithSeverity = new[] { ("CS0219", severity) };
return AssertCodeCleanupResult(expected, code, enabledFixIdsFilter: enabledFixIdsFilter, diagnosticIdsWithSeverity: diagnosticIdsWithSeverity);
}
[Theory]
[InlineData(LanguageNames.CSharp, 50)]
[InlineData(LanguageNames.VisualBasic, 87)]
public void VerifyAllCodeStyleFixersAreSupportedByCodeCleanup(string language, int numberOfUnsupportedDiagnosticIds)
{
var supportedDiagnostics = GetSupportedDiagnosticIdsForCodeCleanupService(language);
// No Duplicates
Assert.Equal(supportedDiagnostics, supportedDiagnostics.Distinct());
// Exact Number of Unsupported Diagnostic Ids
var ideDiagnosticIds = typeof(IDEDiagnosticIds).GetFields().Select(f => f.GetValue(f) as string).ToArray();
var unsupportedDiagnosticIds = ideDiagnosticIds.Except(supportedDiagnostics).ToArray();
Assert.Equal(numberOfUnsupportedDiagnosticIds, unsupportedDiagnosticIds.Length);
}
private const string _code = """
class C
{
public void M1(int x, int y)
{
switch (x)
{
case 1:
case 10:
break;
default:
break;
}
switch (y)
{
case 1:
break;
case 1000:
default:
break;
}
switch (x)
{
case 1:
break;
case 1000:
break;
}
switch (y)
{
default:
break;
}
switch (y) { }
switch (x)
{
case :
case 1000:
break;
}
}
}
""";
private const string _fixed = """
class C
{
public void M1(int x, int y)
{
switch (x)
{
case 1:
case 10:
break;
}
switch (y)
{
case 1:
break;
}
switch (x)
{
case 1:
break;
case 1000:
break;
}
switch (y)
{
}
switch (y) { }
switch (x)
{
case :
case 1000:
break;
}
}
}
""";
[Fact]
public async Task RunThirdPartyFixer()
{
await TestThirdPartyCodeFixerApplied<TestThirdPartyCodeFixWithFixAll, CaseTestAnalyzer>(_code, _fixed);
}
[Fact]
public async Task DoNotRunThirdPartyFixerWithNoFixAll()
{
await TestThirdPartyCodeFixerNoChanges<TestThirdPartyCodeFixWithOutFixAll, CaseTestAnalyzer>(_code);
}
[Theory]
[InlineData(DiagnosticSeverity.Warning)]
[InlineData(DiagnosticSeverity.Error)]
public async Task RunThirdPartyFixerWithSeverityOfWarningOrHigher(DiagnosticSeverity severity)
{
await TestThirdPartyCodeFixerApplied<TestThirdPartyCodeFixWithFixAll, CaseTestAnalyzer>(_code, _fixed, severity);
}
[Theory]
[InlineData(DiagnosticSeverity.Hidden)]
[InlineData(DiagnosticSeverity.Info)]
public async Task DoNotRunThirdPartyFixerWithSeverityLessThanWarning(DiagnosticSeverity severity)
{
await TestThirdPartyCodeFixerNoChanges<TestThirdPartyCodeFixWithOutFixAll, CaseTestAnalyzer>(_code, severity);
}
[Fact]
public async Task DoNotRunThirdPartyFixerIfItDoesNotSupportDocumentScope()
{
await TestThirdPartyCodeFixerNoChanges<TestThirdPartyCodeFixDoesNotSupportDocumentScope, CaseTestAnalyzer>(_code);
}
[Fact]
public async Task DoNotApplyFixerIfChangesAreMadeOutsideDocument()
{
await TestThirdPartyCodeFixerNoChanges<TestThirdPartyCodeFixModifiesSolution, CaseTestAnalyzer>(_code);
}
private static Task TestThirdPartyCodeFixerNoChanges<TCodefix, TAnalyzer>(string code, DiagnosticSeverity severity = DiagnosticSeverity.Warning)
where TAnalyzer : DiagnosticAnalyzer, new()
where TCodefix : CodeFixProvider, new()
{
return TestThirdPartyCodeFixer<TCodefix, TAnalyzer>(code, code, severity);
}
private static Task TestThirdPartyCodeFixerApplied<TCodefix, TAnalyzer>(string code, string expected, DiagnosticSeverity severity = DiagnosticSeverity.Warning)
where TAnalyzer : DiagnosticAnalyzer, new()
where TCodefix : CodeFixProvider, new()
{
return TestThirdPartyCodeFixer<TCodefix, TAnalyzer>(code, expected, severity);
}
private static async Task TestThirdPartyCodeFixer<TCodefix, TAnalyzer>(string code = null, string expected = null, DiagnosticSeverity severity = DiagnosticSeverity.Warning)
where TAnalyzer : DiagnosticAnalyzer, new()
where TCodefix : CodeFixProvider, new()
{
using var workspace = EditorTestWorkspace.CreateCSharp(code, composition: EditorTestCompositions.EditorFeaturesWpf.AddParts(typeof(TCodefix)));
var project = workspace.CurrentSolution.Projects.Single();
var analyzer = (DiagnosticAnalyzer)new TAnalyzer();
var diagnosticIds = analyzer.SupportedDiagnostics.SelectAsArray(d => d.Id);
var editorconfigText = "is_global = true";
foreach (var diagnosticId in diagnosticIds)
{
editorconfigText += $"\ndotnet_diagnostic.{diagnosticId}.severity = {severity.ToEditorConfigString()}";
}
var map = new Dictionary<string, ImmutableArray<DiagnosticAnalyzer>>{
{ LanguageNames.CSharp, ImmutableArray.Create(analyzer) }
};
project = project.AddAnalyzerReference(new TestAnalyzerReferenceByLanguage(map));
project = project.Solution.WithProjectFilePath(project.Id, @$"z:\\{project.FilePath}").GetProject(project.Id);
project = project.AddAnalyzerConfigDocument(".editorconfig", SourceText.From(editorconfigText), filePath: @"z:\\.editorconfig").Project;
workspace.TryApplyChanges(project.Solution);
var hostdoc = workspace.Documents.Single();
var document = workspace.CurrentSolution.GetDocument(hostdoc.Id);
var codeCleanupService = document.GetLanguageService<ICodeCleanupService>();
var enabledDiagnostics = codeCleanupService.GetAllDiagnostics();
var newDoc = await codeCleanupService.CleanupAsync(
document, enabledDiagnostics, CodeAnalysisProgress.None, CancellationToken.None);
var actual = await newDoc.GetTextAsync();
Assert.Equal(expected, actual.ToString());
}
private static string[] GetSupportedDiagnosticIdsForCodeCleanupService(string language)
{
using var workspace = GetTestWorkspaceForLanguage(language);
var hostdoc = workspace.Documents.Single();
var document = workspace.CurrentSolution.GetDocument(hostdoc.Id);
var codeCleanupService = document.GetLanguageService<ICodeCleanupService>();
var enabledDiagnostics = codeCleanupService.GetAllDiagnostics();
var supportedDiagnostics = enabledDiagnostics.Diagnostics.SelectMany(x => x.DiagnosticIds).ToArray();
return supportedDiagnostics;
static EditorTestWorkspace GetTestWorkspaceForLanguage(string language)
{
if (language == LanguageNames.CSharp)
{
return EditorTestWorkspace.CreateCSharp(string.Empty, composition: EditorTestCompositions.EditorFeaturesWpf);
}
if (language == LanguageNames.VisualBasic)
{
return EditorTestWorkspace.CreateVisualBasic(string.Empty, composition: EditorTestCompositions.EditorFeaturesWpf);
}
return null;
}
}
/// <summary>
/// Assert the expected code value equals the actual processed input <paramref name="code"/>.
/// </summary>
/// <param name="expected">The actual processed code to verify against.</param>
/// <param name="code">The input code to be processed and tested.</param>
/// <param name="systemUsingsFirst">Indicates whether <c><see cref="System"/>.*</c> '<c>using</c>' directives should preceed others. Default is <c>true</c>.</param>
/// <param name="separateUsingGroups">Indicates whether '<c>using</c>' directives should be organized into separated groups. Default is <c>true</c>.</param>
/// <param name="enabledFixIdsFilter">Optional filter to determine if a specific fix ID is explicitly enabled for cleanup.</param>
/// <param name="diagnosticIdsWithSeverity">Optional list of diagnostic IDs with effective severities to be configured in editorconfig.</param>
/// <returns>The <see cref="Task"/> to test code cleanup.</returns>
private protected static Task AssertCodeCleanupResult(string expected, string code, bool systemUsingsFirst = true, bool separateUsingGroups = false, Func<string, bool> enabledFixIdsFilter = null, (string, DiagnosticSeverity)[] diagnosticIdsWithSeverity = null)
=> AssertCodeCleanupResult(expected, code, new(AddImportPlacement.OutsideNamespace, NotificationOption2.Silent), systemUsingsFirst, separateUsingGroups, enabledFixIdsFilter, diagnosticIdsWithSeverity);
/// <summary>
/// Assert the expected code value equals the actual processed input <paramref name="code"/>.
/// </summary>
/// <param name="expected">The actual processed code to verify against.</param>
/// <param name="code">The input code to be processed and tested.</param>
/// <param name="preferredImportPlacement">Indicates the code style option for the preferred 'using' directives placement.</param>
/// <param name="systemUsingsFirst">Indicates whether <c><see cref="System"/>.*</c> '<c>using</c>' directives should preceed others. Default is <c>true</c>.</param>
/// <param name="separateUsingGroups">Indicates whether '<c>using</c>' directives should be organized into separated groups. Default is <c>true</c>.</param>
/// <param name="enabledFixIdsFilter">Optional filter to determine if a specific fix ID is explicitly enabled for cleanup.</param>
/// <param name="diagnosticIdsWithSeverity">Optional list of diagnostic IDs with effective severities to be configured in editorconfig.</param>
/// <returns>The <see cref="Task"/> to test code cleanup.</returns>
private protected static async Task AssertCodeCleanupResult(string expected, string code, CodeStyleOption2<AddImportPlacement> preferredImportPlacement, bool systemUsingsFirst = true, bool separateUsingGroups = false, Func<string, bool> enabledFixIdsFilter = null, (string, DiagnosticSeverity)[] diagnosticIdsWithSeverity = null)
{
using var workspace = EditorTestWorkspace.CreateCSharp(code, composition: EditorTestCompositions.EditorFeaturesWpf);
// must set global options since incremental analyzer infra reads from global options
workspace.SetAnalyzerFallbackAndGlobalOptions(new OptionsCollection(LanguageNames.CSharp)
{
{ GenerationOptions.SeparateImportDirectiveGroups, separateUsingGroups },
{ GenerationOptions.PlaceSystemNamespaceFirst, systemUsingsFirst },
{ CSharpCodeStyleOptions.PreferredUsingDirectivePlacement, preferredImportPlacement },
});
var solution = workspace.CurrentSolution.WithAnalyzerReferences(
[
new AnalyzerFileReference(typeof(CSharpCompilerDiagnosticAnalyzer).Assembly.Location, TestAnalyzerAssemblyLoader.LoadFromFile),
new AnalyzerFileReference(typeof(UseExpressionBodyDiagnosticAnalyzer).Assembly.Location, TestAnalyzerAssemblyLoader.LoadFromFile)
]);
if (diagnosticIdsWithSeverity != null)
{
var editorconfigText = "is_global = true";
foreach (var (diagnosticId, severity) in diagnosticIdsWithSeverity)
{
editorconfigText += $"\ndotnet_diagnostic.{diagnosticId}.severity = {severity.ToEditorConfigString()}";
}
var project = solution.Projects.Single();
project = project.AddAnalyzerConfigDocument(".editorconfig", SourceText.From(editorconfigText), filePath: @"z:\\.editorconfig").Project;
solution = project.Solution;
}
workspace.TryApplyChanges(solution);
var hostdoc = workspace.Documents.Single();
var document = workspace.CurrentSolution.GetDocument(hostdoc.Id);
var codeCleanupService = document.GetLanguageService<ICodeCleanupService>();
var enabledDiagnostics = codeCleanupService.GetAllDiagnostics();
if (enabledFixIdsFilter != null)
enabledDiagnostics = VisualStudio.LanguageServices.Implementation.CodeCleanup.AbstractCodeCleanUpFixer.AdjustDiagnosticOptions(enabledDiagnostics, enabledFixIdsFilter);
var newDoc = await codeCleanupService.CleanupAsync(
document, enabledDiagnostics, CodeAnalysisProgress.None, CancellationToken.None);
var actual = await newDoc.GetTextAsync();
Assert.Equal(expected, actual.ToString());
}
private static readonly CodeStyleOption2<AddImportPlacement> InsideNamespaceOption =
new CodeStyleOption2<AddImportPlacement>(AddImportPlacement.InsideNamespace, NotificationOption2.Error);
private static readonly CodeStyleOption2<AddImportPlacement> OutsideNamespaceOption =
new CodeStyleOption2<AddImportPlacement>(AddImportPlacement.OutsideNamespace, NotificationOption2.Error);
private static readonly CodeStyleOption2<AddImportPlacement> InsidePreferPreservationOption =
new CodeStyleOption2<AddImportPlacement>(AddImportPlacement.InsideNamespace, NotificationOption2.None);
private static readonly CodeStyleOption2<AddImportPlacement> OutsidePreferPreservationOption =
new CodeStyleOption2<AddImportPlacement>(AddImportPlacement.OutsideNamespace, NotificationOption2.None);
}
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