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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.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 TupleConstructionSignatureHelpProviderTests : AbstractCSharpSignatureHelpProviderTests
{
internal override Type GetSignatureHelpProviderType()
=> typeof(TupleConstructionSignatureHelpProvider);
[Fact]
public async Task InvocationAfterOpenParen()
{
var markup = """
class C
{
(int, int) y = [|($$
|]}
""";
var expectedOrderedItems = new List<SignatureHelpTestItem>
{
new SignatureHelpTestItem("(int, int)", currentParameterIndex: 0, parameterDocumentation: "")
};
await TestAsync(markup, expectedOrderedItems, usePreviousCharAsTrigger: true);
}
[Fact]
public async Task InvocationWithNullableReferenceTypes()
{
var markup = """
class C
{
(string?, string) y = [|($$
|]}
""";
var expectedOrderedItems = new List<SignatureHelpTestItem>
{
new SignatureHelpTestItem("(string?, string)", currentParameterIndex: 0)
};
await TestAsync(markup, expectedOrderedItems, usePreviousCharAsTrigger: true);
}
[Fact, WorkItem("https://devdiv.visualstudio.com/DevDiv/_workitems/edit/655607")]
public async Task TestMissingTupleElement()
{
var markup = """
class C
{
void M()
{
(a, ) = [|($$
|] }
}
""";
var expectedOrderedItems = new List<SignatureHelpTestItem>
{
new SignatureHelpTestItem("(object a, object)", currentParameterIndex: 0)
};
await TestAsync(markup, expectedOrderedItems, usePreviousCharAsTrigger: true);
}
[Fact]
public async Task InvocationAfterOpenParen2()
{
var markup = """
class C
{
(int, int) y = [|($$)|]
}
""";
var expectedOrderedItems = new List<SignatureHelpTestItem>
{
new SignatureHelpTestItem("(int, int)", currentParameterIndex: 0)
};
await TestAsync(markup, expectedOrderedItems, usePreviousCharAsTrigger: true);
}
[Fact]
public async Task InvocationAfterComma1()
{
var markup = """
class C
{
(int, int) y = [|(1,$$
|]}
""";
var expectedOrderedItems = new List<SignatureHelpTestItem>
{
new SignatureHelpTestItem("(int, int)", currentParameterIndex: 1, parameterDocumentation: "")
};
await TestAsync(markup, expectedOrderedItems, usePreviousCharAsTrigger: true);
}
[Fact]
public async Task InvocationAfterComma2()
{
var markup = """
class C
{
(int, int) y = [|(1,$$)|]
}
""";
var expectedOrderedItems = new List<SignatureHelpTestItem>
{
new SignatureHelpTestItem("(int, int)", currentParameterIndex: 1)
};
await TestAsync(markup, expectedOrderedItems, usePreviousCharAsTrigger: true);
}
[Fact]
public async Task ParameterIndexWithNameTyped()
{
var markup = """
class C
{
(int a, int b) y = [|(b: $$
|]}
""";
var expectedOrderedItems = new List<SignatureHelpTestItem>
{
// currentParameterIndex only considers the position in the argument list
// and not names, hence passing 0 even though the controller will highlight
// "int b" in the actual display
new SignatureHelpTestItem("(int a, int b)", currentParameterIndex: 0)
};
await TestAsync(markup, expectedOrderedItems);
}
[Fact(Skip = "https://github.com/dotnet/roslyn/issues/14277")]
public async Task NestedTuple()
{
var markup = """
class C
{
(int a, (int b, int c)) y = [|(1, ($$
|]}
""";
var expectedOrderedItems = new List<SignatureHelpTestItem>
{
new SignatureHelpTestItem("(int b, int c)", currentParameterIndex: 0)
};
await TestAsync(markup, expectedOrderedItems, usePreviousCharAsTrigger: true);
}
[Fact]
public async Task NestedTupleWhenNotInferred()
{
var markup = """
class C
{
(int, object) y = [|(1, ($$
|]}
""";
var expectedOrderedItems = new List<SignatureHelpTestItem>
{
new SignatureHelpTestItem("(int, object)", currentParameterIndex: 1)
};
await TestAsync(markup, expectedOrderedItems, usePreviousCharAsTrigger: true);
}
[Fact]
public async Task NestedTupleWhenNotInferred2()
{
var markup = """
class C
{
(int, object) y = [|(1, (2,$$
|]}
""";
var expectedOrderedItems = new List<SignatureHelpTestItem>
{
new SignatureHelpTestItem("(int, object)", currentParameterIndex: 1)
};
await TestAsync(markup, expectedOrderedItems, usePreviousCharAsTrigger: true);
}
[Fact]
public async Task NestedTupleWhenNotInferred3()
{
var markup = """
class C
{
(int, object) y = [|(1, ($$
|]}
""";
var expectedOrderedItems = new List<SignatureHelpTestItem>
{
new SignatureHelpTestItem("(int, object)", currentParameterIndex: 1)
};
await TestAsync(markup, expectedOrderedItems, usePreviousCharAsTrigger: true);
}
[Fact]
public async Task NestedTupleWhenNotInferred4()
{
var markup = """
class C
{
(object, object) y = [|(($$
|]}
""";
var expectedOrderedItems = new List<SignatureHelpTestItem>
{
new SignatureHelpTestItem("(object, object)", currentParameterIndex: 0)
};
await TestAsync(markup, expectedOrderedItems, usePreviousCharAsTrigger: true);
}
[Fact]
public async Task MultipleOverloads()
{
var markup = """
class Program
{
static void Main(string[] args)
{
Do1([|($$)|])
}
static void Do1((int, int) i) { }
static void Do1((string, string) s) { }
}
""";
var expectedOrderedItems = new List<SignatureHelpTestItem>
{
new SignatureHelpTestItem("(int, int)", currentParameterIndex: 0),
new SignatureHelpTestItem("(string, string)", currentParameterIndex: 0)
};
await TestAsync(markup, expectedOrderedItems, usePreviousCharAsTrigger: true);
}
[Fact, WorkItem("https://github.com/dotnet/roslyn/issues/14793")]
public async Task DoNotCrashInLinkedFile()
{
var markup = """
<Workspace>
<Project Language="C#" CommonReferences="true" AssemblyName="Proj1" PreprocessorSymbols="GOO">
<Document FilePath="SourceDocument"><![CDATA[
class C
{
#if GOO
void bar()
{
}
#endif
void goo()
{
(int, string) x = ($$
}
}
]]>
</Document>
</Project>
<Project Language="C#" CommonReferences="true" AssemblyName="Proj2">
<Document IsLinkFile="true" LinkAssemblyName="Proj1" LinkFilePath="SourceDocument"/>
</Project>
</Workspace>
""";
var expectedDescription = new SignatureHelpTestItem($"(int, string)", currentParameterIndex: 0);
await VerifyItemWithReferenceWorkerAsync(markup, [expectedDescription], false);
}
}
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