ObjectCreationExpressionSignatureHelpProviderTests.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.
 
#nullable disable
 
using System;
using System.Collections.Generic;
using System.Threading.Tasks;
using Microsoft.CodeAnalysis.CSharp.SignatureHelp;
using Microsoft.CodeAnalysis.Editor.UnitTests.SignatureHelp;
using Microsoft.CodeAnalysis.Test.Utilities;
using Roslyn.Test.Utilities;
using Xunit;
 
namespace Microsoft.CodeAnalysis.Editor.CSharp.UnitTests.SignatureHelp;
 
[Trait(Traits.Feature, Traits.Features.SignatureHelp)]
public class ObjectCreationExpressionSignatureHelpProviderTests : AbstractCSharpSignatureHelpProviderTests
{
    internal override Type GetSignatureHelpProviderType()
        => typeof(ObjectCreationExpressionSignatureHelpProvider);
 
    #region "Regular tests"
 
    [Fact]
    public async Task TestInvocationWithoutParameters()
    {
        var markup = """
            class C
            {
                void goo()
                {
                    var c = [|new C($$|]);
                }
            }
            """;
 
        var expectedOrderedItems = new List<SignatureHelpTestItem>
        {
            new SignatureHelpTestItem("C()", string.Empty, null, currentParameterIndex: 0)
        };
 
        await TestAsync(markup, expectedOrderedItems);
    }
 
    [Fact]
    public async Task TestImplicitInvocationWithoutParameters()
    {
        var markup = """
            <Workspace>
                <Project Language="C#" LanguageVersion="Preview" CommonReferences="true">
                    <Document FilePath="SourceDocument"><![CDATA[
            class C
            {
                void M()
                {
                    C c = [|new($$|]);
                }
            }
                    </Document>
                </Project>
            </Workspace>
            """;
 
        var expectedOrderedItems = new List<SignatureHelpTestItem>
        {
            new SignatureHelpTestItem("C()", string.Empty, null, currentParameterIndex: 0)
        };
 
        await TestAsync(markup, expectedOrderedItems);
    }
 
    [Fact]
    public async Task TestInvocationWithoutParametersMethodXmlComments()
    {
        var markup = """
            class C
            {
                /// <summary>
                /// Summary for C
                /// </summary>
                C() { }
 
                void Goo()
                {
                    C c = [|new C($$|]);
                }
            }
            """;
 
        var expectedOrderedItems = new List<SignatureHelpTestItem>
        {
            new SignatureHelpTestItem("C()", "Summary for C", null, currentParameterIndex: 0)
        };
        await TestAsync(markup, expectedOrderedItems);
    }
 
    [Fact]
    public async Task TestInvocationWithParametersOn1()
    {
        var markup = """
            class C
            {
                C(int a, int b) { }
 
                void Goo()
                {
                    C c = [|new C($$2, 3|]);
                }
            }
            """;
 
        var expectedOrderedItems = new List<SignatureHelpTestItem>
        {
            new SignatureHelpTestItem("C(int a, int b)", string.Empty, string.Empty, currentParameterIndex: 0)
        };
 
        await TestAsync(markup, expectedOrderedItems);
    }
 
    [Fact]
    public async Task TestImplicitInvocationWithParametersOn1()
    {
        var markup = """
            class C
            {
                C(int a, int b) { }
 
                void M()
                {
                    C c = [|new($$2, 3|]);
                }
            }
            """;
 
        var expectedOrderedItems = new List<SignatureHelpTestItem>
        {
            new SignatureHelpTestItem("C(int a, int b)", string.Empty, string.Empty, currentParameterIndex: 0)
        };
 
        await TestAsync(markup, expectedOrderedItems);
    }
 
    [Fact]
    public async Task TestInvocationWithParametersXmlCommentsOn1()
    {
        var markup = """
            class C
            {
                /// <summary>
                /// Summary for C
                /// </summary>
                /// <param name="a">Param a</param>
                /// <param name="b">Param b</param>
                C(int a, int b) { }
 
                void Goo()
                {
                    C c = [|new C($$2, 3|]);
                }
            }
            """;
 
        var expectedOrderedItems = new List<SignatureHelpTestItem>
        {
            new SignatureHelpTestItem("C(int a, int b)", "Summary for C", "Param a", currentParameterIndex: 0)
        };
 
        await TestAsync(markup, expectedOrderedItems);
    }
 
    [Fact]
    public async Task TestInvocationWithParametersOn2()
    {
        var markup = """
            class C
            {
                C(int a, int b) { }
 
                void Goo()
                {
                    C c = [|new C(2, $$3|]);
                }
            }
            """;
        var expectedOrderedItems = new List<SignatureHelpTestItem>
        {
            new SignatureHelpTestItem("C(int a, int b)", string.Empty, string.Empty, currentParameterIndex: 1)
        };
 
        await TestAsync(markup, expectedOrderedItems);
    }
 
    [Fact]
    public async Task TestInvocationWithParametersXmlComentsOn2()
    {
        var markup = """
            class C
            {
                /// <summary>
                /// Summary for C
                /// </summary>
                /// <param name="a">Param a</param>
                /// <param name="b">Param b</param>
                C(int a, int b) { }
 
                void Goo()
                {
                    C c = [|new C(2, $$3|]);
                }
            }
            """;
        var expectedOrderedItems = new List<SignatureHelpTestItem>
        {
            new SignatureHelpTestItem("C(int a, int b)", "Summary for C", "Param b", currentParameterIndex: 1)
        };
 
        await TestAsync(markup, expectedOrderedItems);
    }
 
    [Fact, WorkItem("https://github.com/dotnet/roslyn/issues/25830")]
    public async Task PickCorrectOverload_PickFirst()
    {
        var markup = """
            class D
            {
                void M()
                {
                    [|new D(i: 1$$|]);
                }
                D(D filtered) => throw null;
                D(string i) => throw null;
                D(int i) => throw null;
            }
            """;
        var expectedOrderedItems = new List<SignatureHelpTestItem>
        {
            new SignatureHelpTestItem("D(int i)", currentParameterIndex: 0, isSelected: true),
            new SignatureHelpTestItem("D(string i)", currentParameterIndex: 0),
        };
 
        await TestAsync(markup, expectedOrderedItems);
    }
 
    [Fact]
    public async Task PickCorrectOverload_PickFirst_ImplicitObjectCreation()
    {
        var markup = """
            class D
            {
                void M()
                {
                    D d = [|new(i: 1$$|]);
                }
                D(D filtered) => throw null;
                D(string i) => throw null;
                D(int i) => throw null;
            }
            """;
        var expectedOrderedItems = new List<SignatureHelpTestItem>
        {
            new SignatureHelpTestItem("D(int i)", currentParameterIndex: 0, isSelected: true),
            new SignatureHelpTestItem("D(string i)", currentParameterIndex: 0),
        };
 
        await TestAsync(markup, expectedOrderedItems);
    }
 
    [Fact, WorkItem("https://github.com/dotnet/roslyn/issues/25830")]
    public async Task PickCorrectOverload_PickSecond()
    {
        var markup = """
            class D
            {
                void M()
                {
                    [|new D(i: null$$|]);
                }
                D(D filtered) => throw null;
                D(string i) => throw null;
                D(int i) => throw null;
            }
            """;
        var expectedOrderedItems = new List<SignatureHelpTestItem>
        {
            new SignatureHelpTestItem("D(int i)", currentParameterIndex: 0),
            new SignatureHelpTestItem("D(string i)", currentParameterIndex: 0, isSelected: true),
        };
 
        await TestAsync(markup, expectedOrderedItems);
    }
 
    [Fact]
    public async Task PickCorrectOverload_PickSecond_ImplicitObjectCreation()
    {
        var markup = """
            class D
            {
                void M()
                {
                    D d = [|new(i: null$$|]);
                }
                D(D filtered) => throw null;
                D(string i) => throw null;
                D(int i) => throw null;
            }
            """;
        var expectedOrderedItems = new List<SignatureHelpTestItem>
        {
            new SignatureHelpTestItem("D(int i)", currentParameterIndex: 0),
            new SignatureHelpTestItem("D(string i)", currentParameterIndex: 0, isSelected: true),
        };
 
        await TestAsync(markup, expectedOrderedItems);
    }
 
    [Fact]
    public async Task TestInvocationWithoutClosingParen()
    {
        var markup = """
            class C
            {
                void goo()
                {
                    var c = [|new C($$
                |]}
            }
            """;
 
        var expectedOrderedItems = new List<SignatureHelpTestItem>
        {
            new SignatureHelpTestItem("C()", string.Empty, null, currentParameterIndex: 0)
        };
 
        await TestAsync(markup, expectedOrderedItems);
    }
 
    [Fact]
    public async Task TestInvocationWithoutClosingParenWithParameters()
    {
        var markup = """
            class C
            {
                C(int a, int b) { }
 
                void Goo()
                {
                    C c = [|new C($$2, 3
                |]}
            }
            """;
 
        var expectedOrderedItems = new List<SignatureHelpTestItem>
        {
            new SignatureHelpTestItem("C(int a, int b)", string.Empty, string.Empty, currentParameterIndex: 0)
        };
 
        await TestAsync(markup, expectedOrderedItems);
    }
 
    [Fact]
    public async Task TestInvocationWithoutClosingParenWithParametersOn2()
    {
        var markup = """
            class C
            {
                C(int a, int b) { }
 
                void Goo()
                {
                    C c = [|new C(2, $$3
                |]}
            }
            """;
 
        var expectedOrderedItems = new List<SignatureHelpTestItem>
        {
            new SignatureHelpTestItem("C(int a, int b)", string.Empty, string.Empty, currentParameterIndex: 1)
        };
 
        await TestAsync(markup, expectedOrderedItems);
    }
 
    [Fact]
    public async Task TestInvocationOnLambda()
    {
        var markup = """
            using System;
 
            class C
            {
                void goo()
                {
                    var bar = [|new Action<int, int>($$
                |]}
            }
            """;
 
        var expectedOrderedItems = new List<SignatureHelpTestItem>
        {
            new SignatureHelpTestItem("Action<int, int>(void (int, int) target)", string.Empty, string.Empty, currentParameterIndex: 0, isSelected: true)
        };
 
        await TestAsync(markup, expectedOrderedItems);
    }
 
    #endregion
 
    #region "Current Parameter Name"
 
    [Fact]
    public async Task TestCurrentParameterName()
    {
        var markup = """
            class C
            {
                C(int a, string b)
                {
                }
 
                void goo()
                {
                    var c = [|new C(b: string.Empty, $$a: 2|]);
                }
            }
            """;
 
        await VerifyCurrentParameterNameAsync(markup, "a");
    }
 
    #endregion
 
    #region "Trigger tests"
 
    [Fact]
    public async Task TestInvocationOnTriggerParens()
    {
        var markup = """
            class C
            {
                void goo()
                {
                    var c = [|new C($$|]);
                }
            }
            """;
 
        var expectedOrderedItems = new List<SignatureHelpTestItem>
        {
            new SignatureHelpTestItem("C()", string.Empty, null, currentParameterIndex: 0)
        };
 
        await TestAsync(markup, expectedOrderedItems, usePreviousCharAsTrigger: true);
    }
 
    [Fact]
    public async Task TestInvocationOnTriggerComma()
    {
        var markup = """
            class C
            {
                C(int a, string b)
                {
                }
 
                void goo()
                {
                    var c = [|new C(2,$$string.Empty|]);
                }
            }
            """;
 
        var expectedOrderedItems = new List<SignatureHelpTestItem>
        {
            new SignatureHelpTestItem("C(int a, string b)", string.Empty, string.Empty, currentParameterIndex: 1)
        };
 
        await TestAsync(markup, expectedOrderedItems, usePreviousCharAsTrigger: true);
    }
 
    [Fact]
    public async Task TestNoInvocationOnSpace()
    {
        var markup = """
            class C
            {
                C(int a, string b)
                {
                }
 
                void goo()
                {
                    var c = [|new C(2, $$string.Empty|]);
                }
            }
            """;
 
        var expectedOrderedItems = new List<SignatureHelpTestItem>();
        await TestAsync(markup, expectedOrderedItems, usePreviousCharAsTrigger: true);
    }
 
    [Fact]
    public void TestTriggerCharacters()
    {
        char[] expectedCharacters = [',', '('];
        char[] unexpectedCharacters = [' ', '[', '<'];
 
        VerifyTriggerCharacters(expectedCharacters, unexpectedCharacters);
    }
    #endregion
 
    #region "EditorBrowsable tests"
 
    [Fact, WorkItem(7336, "DevDiv_Projects/Roslyn")]
    public async Task EditorBrowsable_Constructor_BrowsableAlways()
    {
        var markup = """
            class Program
            {
                void M()
                {
                    new Goo($$
                }
            }
            """;
 
        var referencedCode = """
            public class Goo
            {
                [System.ComponentModel.EditorBrowsableAttribute(System.ComponentModel.EditorBrowsableState.Always)]
                public Goo(int x)
                {
                }
            }
            """;
 
        var expectedOrderedItems = new List<SignatureHelpTestItem>
        {
            new SignatureHelpTestItem("Goo(int x)", string.Empty, string.Empty, currentParameterIndex: 0)
        };
 
        await TestSignatureHelpInEditorBrowsableContextsAsync(markup: markup,
                                            referencedCode: referencedCode,
                                            expectedOrderedItemsMetadataReference: expectedOrderedItems,
                                            expectedOrderedItemsSameSolution: expectedOrderedItems,
                                            sourceLanguage: LanguageNames.CSharp,
                                            referencedLanguage: LanguageNames.CSharp);
    }
 
    [Fact, WorkItem(7336, "DevDiv_Projects/Roslyn")]
    public async Task EditorBrowsable_Constructor_BrowsableNever()
    {
        var markup = """
            class Program
            {
                void M()
                {
                    new Goo($$
                }
            }
            """;
 
        var referencedCode = """
            public class Goo
            {
                [System.ComponentModel.EditorBrowsableAttribute(System.ComponentModel.EditorBrowsableState.Never)]
                public Goo(int x)
                {
                }
            }
            """;
 
        var expectedOrderedItems = new List<SignatureHelpTestItem>
        {
            new SignatureHelpTestItem("Goo(int x)", string.Empty, string.Empty, currentParameterIndex: 0)
        };
 
        await TestSignatureHelpInEditorBrowsableContextsAsync(markup: markup,
                                            referencedCode: referencedCode,
                                            expectedOrderedItemsMetadataReference: new List<SignatureHelpTestItem>(),
                                            expectedOrderedItemsSameSolution: expectedOrderedItems,
                                            sourceLanguage: LanguageNames.CSharp,
                                            referencedLanguage: LanguageNames.CSharp);
    }
 
    [Fact, WorkItem(7336, "DevDiv_Projects/Roslyn")]
    public async Task EditorBrowsable_Constructor_BrowsableAdvanced()
    {
        var markup = """
            class Program
            {
                void M()
                {
                    new Goo($$
                }
            }
            """;
 
        var referencedCode = """
            public class Goo
            {
                [System.ComponentModel.EditorBrowsableAttribute(System.ComponentModel.EditorBrowsableState.Advanced)]
                public Goo()
                {
                }
            }
            """;
        var expectedOrderedItems = new List<SignatureHelpTestItem>
        {
            new SignatureHelpTestItem("Goo()", string.Empty, null, currentParameterIndex: 0)
        };
 
        await TestSignatureHelpInEditorBrowsableContextsAsync(markup: markup,
                                            referencedCode: referencedCode,
                                            expectedOrderedItemsMetadataReference: new List<SignatureHelpTestItem>(),
                                            expectedOrderedItemsSameSolution: expectedOrderedItems,
                                            sourceLanguage: LanguageNames.CSharp,
                                            referencedLanguage: LanguageNames.CSharp,
                                            hideAdvancedMembers: true);
 
        await TestSignatureHelpInEditorBrowsableContextsAsync(markup: markup,
                                referencedCode: referencedCode,
                                expectedOrderedItemsMetadataReference: expectedOrderedItems,
                                expectedOrderedItemsSameSolution: expectedOrderedItems,
                                sourceLanguage: LanguageNames.CSharp,
                                referencedLanguage: LanguageNames.CSharp,
                                hideAdvancedMembers: false);
    }
 
    [Fact, WorkItem(7336, "DevDiv_Projects/Roslyn")]
    public async Task EditorBrowsable_Constructor_BrowsableMixed()
    {
        var markup = """
            class Program
            {
                void M()
                {
                    new Goo($$
                }
            }
            """;
 
        var referencedCode = """
            public class Goo
            {
                [System.ComponentModel.EditorBrowsableAttribute(System.ComponentModel.EditorBrowsableState.Always)]
                public Goo(int x)
                {
                }
                [System.ComponentModel.EditorBrowsableAttribute(System.ComponentModel.EditorBrowsableState.Never)]
                public Goo(long y)
                {
                }
            }
            """;
        var expectedOrderedItemsMetadataReference = new List<SignatureHelpTestItem>
        {
            new SignatureHelpTestItem("Goo(int x)", string.Empty, string.Empty, currentParameterIndex: 0)
        };
 
        var expectedOrderedItemsSameSolution = new List<SignatureHelpTestItem>
        {
            new SignatureHelpTestItem("Goo(int x)", string.Empty, string.Empty, currentParameterIndex: 0),
            new SignatureHelpTestItem("Goo(long y)", string.Empty, string.Empty, currentParameterIndex: 0)
        };
 
        await TestSignatureHelpInEditorBrowsableContextsAsync(markup: markup,
                                            referencedCode: referencedCode,
                                            expectedOrderedItemsMetadataReference: expectedOrderedItemsMetadataReference,
                                            expectedOrderedItemsSameSolution: expectedOrderedItemsSameSolution,
                                            sourceLanguage: LanguageNames.CSharp,
                                            referencedLanguage: LanguageNames.CSharp);
    }
 
    #endregion
 
    [Fact]
    public async Task FieldUnavailableInOneLinkedFile()
    {
        var markup = """
            <Workspace>
                <Project Language="C#" CommonReferences="true" AssemblyName="Proj1" PreprocessorSymbols="GOO">
                    <Document FilePath="SourceDocument"><![CDATA[
            class C
            {
            #if GOO
                class D
                {
                }
            #endif
                void goo()
                {
                    var x = new D($$
                }
            }
            ]]>
                    </Document>
                </Project>
                <Project Language="C#" CommonReferences="true" AssemblyName="Proj2">
                    <Document IsLinkFile="true" LinkAssemblyName="Proj1" LinkFilePath="SourceDocument"/>
                </Project>
            </Workspace>
            """;
        var expectedDescription = new SignatureHelpTestItem($"D()\r\n\r\n{string.Format(FeaturesResources._0_1, "Proj1", FeaturesResources.Available)}\r\n{string.Format(FeaturesResources._0_1, "Proj2", FeaturesResources.Not_Available)}\r\n\r\n{FeaturesResources.You_can_use_the_navigation_bar_to_switch_contexts}", currentParameterIndex: 0);
        await VerifyItemWithReferenceWorkerAsync(markup, [expectedDescription], false);
    }
 
    [Fact]
    public async Task ExcludeFilesWithInactiveRegions()
    {
        var markup = """
            <Workspace>
                <Project Language="C#" CommonReferences="true" AssemblyName="Proj1" PreprocessorSymbols="GOO,BAR">
                    <Document FilePath="SourceDocument"><![CDATA[
            class C
            {
            #if GOO
                class D
                {
                }
            #endif
 
            #if BAR
                void goo()
                {
                    var x = new D($$
                }
            #endif
            }
            ]]>
                    </Document>
                </Project>
                <Project Language="C#" CommonReferences="true" AssemblyName="Proj2">
                    <Document IsLinkFile="true" LinkAssemblyName="Proj1" LinkFilePath="SourceDocument" />
                </Project>
                <Project Language="C#" CommonReferences="true" AssemblyName="Proj3" PreprocessorSymbols="BAR">
                    <Document IsLinkFile="true" LinkAssemblyName="Proj1" LinkFilePath="SourceDocument"/>
                </Project>
            </Workspace>
            """;
 
        var expectedDescription = new SignatureHelpTestItem($"D()\r\n\r\n{string.Format(FeaturesResources._0_1, "Proj1", FeaturesResources.Available)}\r\n{string.Format(FeaturesResources._0_1, "Proj3", FeaturesResources.Not_Available)}\r\n\r\n{FeaturesResources.You_can_use_the_navigation_bar_to_switch_contexts}", currentParameterIndex: 0);
        await VerifyItemWithReferenceWorkerAsync(markup, [expectedDescription], false);
    }
 
    [Fact, WorkItem("http://vstfdevdiv:8080/DevDiv2/DevDiv/_workitems/edit/1067933")]
    public async Task InvokedWithNoToken()
    {
        var markup = """
            // new goo($$
            """;
 
        await TestAsync(markup);
    }
 
    [Fact, WorkItem("http://vstfdevdiv:8080/DevDiv2/DevDiv/_workitems/edit/1078993")]
    public async Task TestSigHelpInIncorrectObjectCreationExpression()
    {
        var markup = """
            class C
            {
                void goo(C c)
                {
                    goo([|new C{$$|]
                }
            }
            """;
 
        await TestAsync(markup);
    }
 
    [Fact]
    public async Task TypingTupleDoesNotDismiss1()
    {
        var markup = """
            class C
            {
                public C(object o) { }
                public C M()
                {
                    return [|new C(($$)
                |]}
 
            }
            """;
 
        var expectedOrderedItems = new List<SignatureHelpTestItem>
        {
            new SignatureHelpTestItem("C(object o)", currentParameterIndex: 0)
        };
 
        await TestAsync(markup, expectedOrderedItems, usePreviousCharAsTrigger: true);
    }
 
    [Fact]
    public async Task TypingTupleDoesNotDismiss2()
    {
        var markup = """
            class C
            {
                public C(object o) { }
                public C M()
                {
                    return [|new C((1,$$)
                |]}
 
            }
            """;
 
        var expectedOrderedItems = new List<SignatureHelpTestItem>
        {
            new SignatureHelpTestItem("C(object o)", currentParameterIndex: 0)
        };
 
        await TestAsync(markup, expectedOrderedItems, usePreviousCharAsTrigger: true);
    }
 
    [Fact]
    public async Task TypingTupleDoesNotDismiss3()
    {
        var markup = """
            class C
            {
                public C(object o) { }
                public C M()
                {
                    return [|new C((1, ($$)
                |]}
 
            }
            """;
 
        var expectedOrderedItems = new List<SignatureHelpTestItem>
        {
            new SignatureHelpTestItem("C(object o)", currentParameterIndex: 0)
        };
 
        await TestAsync(markup, expectedOrderedItems, usePreviousCharAsTrigger: true);
    }
 
    [Fact]
    public async Task TypingTupleDoesNotDismiss4()
    {
        var markup = """
            class C
            {
                public C(object o) { }
                public C M()
                {
                    return [|new C((1, (2,$$)
                |]}
 
            }
            """;
 
        var expectedOrderedItems = new List<SignatureHelpTestItem>
        {
            new SignatureHelpTestItem("C(object o)", currentParameterIndex: 0)
        };
 
        await TestAsync(markup, expectedOrderedItems, usePreviousCharAsTrigger: true);
    }
 
    [Theory]
    [InlineData("1$$", 0, 0)]
    [InlineData("1$$, ", 0, 0)]
    [InlineData("1, $$", 1, 0)]
    [InlineData("s: $$", 1, 0)]
    [InlineData("s: string.Empty$$", 1, 0)]
    [InlineData("s: string.Empty$$, ", 1, 0)]
    [InlineData("s: string.Empty, $$", 0, 0)]
    [InlineData("string.Empty$$", 0, 1)]
    [InlineData("string.Empty$$, ", 0, 1)]
    [InlineData("string.Empty,$$", 1, 1)]
    [InlineData("$$, ", 0, 0)]
    [InlineData(",$$", 1, 0)]
    [InlineData("$$, s: string.Empty", 0, 0)]
    [WorkItem("https://github.com/dotnet/roslyn/issues/6713")]
    public async Task PickCorrectOverload_Incomplete(string arguments, int expectedParameterIndex, int expecteSelectedIndex)
    {
        var markup = """
            class Program
            {
                static void M()
                {
                    [|new Program(ARGUMENTS|]);
                }
                Program(int i, string s) { }
                Program(string s, string s2) { }
            }
            """;
 
        var index = 0;
        var expectedOrderedItems = new List<SignatureHelpTestItem>
        {
            new SignatureHelpTestItem("Program(int i, string s)", currentParameterIndex: expectedParameterIndex, isSelected: expecteSelectedIndex == index++),
            new SignatureHelpTestItem("Program(string s, string s2)", currentParameterIndex: expectedParameterIndex, isSelected: expecteSelectedIndex == index++),
        };
 
        await TestAsync(markup.Replace("ARGUMENTS", arguments), expectedOrderedItems);
    }
 
    [Theory]
    [InlineData("s2: $$", 1)]
    [InlineData("s2: string.Empty$$", 1)]
    [InlineData("s2: string.Empty$$,", 1)]
    [InlineData("s2: string.Empty,$$", 0)]
    [WorkItem("https://github.com/dotnet/roslyn/issues/6713")]
    public async Task PickCorrectOverload_Incomplete_WithNames(string arguments, int expectedParameterIndex)
    {
        var markup = """
            class Program
            {
                void M()
                {
                    [|new Program(ARGUMENTS|]);
                }
                Program(int i, string s) { }
                Program(string s, string s2) { }
            }
            """;
 
        var expectedOrderedItems = new List<SignatureHelpTestItem>
        {
            new SignatureHelpTestItem($"Program(string s, string s2)", currentParameterIndex: expectedParameterIndex, isSelected: true),
        };
 
        await TestAsync(markup.Replace("ARGUMENTS", arguments), expectedOrderedItems);
    }
}
File: SignatureHelp\ObjectCreationExpressionSignatureHelpProviderTests.cs	Web Access
Project: src\src\EditorFeatures\CSharpTest\Microsoft.CodeAnalysis.CSharp.EditorFeatures.UnitTests.csproj (Microsoft.CodeAnalysis.CSharp.EditorFeatures.UnitTests)