﻿// 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;
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 AttributeSignatureHelpProviderTests : AbstractCSharpSignatureHelpProviderTests
    {
        internal override Type GetSignatureHelpProviderType()
            => typeof(AttributeSignatureHelpProvider);

        #region "Regular tests"

        [Fact]
        public async Task TestInvocationWithoutParameters()
        {
            var markup = @"
class SomethingAttribute : System.Attribute
{
}

[[|Something($$|]]
class D
{
}";

            var expectedOrderedItems = new List<SignatureHelpTestItem>();
            expectedOrderedItems.Add(new SignatureHelpTestItem("SomethingAttribute()", string.Empty, null, currentParameterIndex: 0));

            await TestAsync(markup, expectedOrderedItems);
        }

        [Fact]
        public async Task TestInvocationWithoutParametersMethodXmlComments()
        {
            var markup = @"
class SomethingAttribute : System.Attribute
{
    /// <summary>Summary For Attribute</summary>
    public SomethingAttribute() { }
}

[[|Something($$|]]
class D
{
}";

            var expectedOrderedItems = new List<SignatureHelpTestItem>();
            expectedOrderedItems.Add(new SignatureHelpTestItem("SomethingAttribute()", "Summary For Attribute", null, currentParameterIndex: 0));

            await TestAsync(markup, expectedOrderedItems);
        }

        [Fact, WorkItem("https://github.com/dotnet/roslyn/issues/25830")]
        public async Task PickCorrectOverload_PickInt()
        {
            var markup = @"
class SomethingAttribute : System.Attribute
{
    public SomethingAttribute(string i) => throw null;
    public SomethingAttribute(int i) => throw null;
    public SomethingAttribute(byte filtered) => throw null;
}
[[|Something(i: 1$$|])]
class D { }
";
            var expectedOrderedItems = new List<SignatureHelpTestItem>
            {
                new SignatureHelpTestItem("SomethingAttribute(int i)", currentParameterIndex: 0, isSelected: true),
                new SignatureHelpTestItem("SomethingAttribute(string i)", currentParameterIndex: 0),
            };

            await TestAsync(markup, expectedOrderedItems);
        }

        [Fact, WorkItem("https://github.com/dotnet/roslyn/issues/25830")]
        public async Task PickCorrectOverload_PickString()
        {
            var markup = @"
class SomethingAttribute : System.Attribute
{
    public SomethingAttribute(string i) => throw null;
    public SomethingAttribute(int i) => throw null;
    public SomethingAttribute(byte filtered) => throw null;
}
[[|Something(i: null$$|])]
class D { }
";
            var expectedOrderedItems = new List<SignatureHelpTestItem>
            {
                new SignatureHelpTestItem("SomethingAttribute(int i)", currentParameterIndex: 0),
                new SignatureHelpTestItem("SomethingAttribute(string i)", currentParameterIndex: 0, isSelected: true),
            };

            await TestAsync(markup, expectedOrderedItems);
        }

        [Fact]
        public async Task TestInvocationWithParametersOn1()
        {
            var markup = @"
class SomethingAttribute : System.Attribute
{
    public SomethingAttribute(int someInteger, string someString) { }
}

[[|Something($$|]]
class D
{
}";

            var expectedOrderedItems = new List<SignatureHelpTestItem>();
            expectedOrderedItems.Add(new SignatureHelpTestItem("SomethingAttribute(int someInteger, string someString)", string.Empty, string.Empty, currentParameterIndex: 0));

            await TestAsync(markup, expectedOrderedItems);
        }

        [Fact]
        public async Task TestInvocationWithParametersXmlCommentsOn1()
        {
            var markup = @"
class SomethingAttribute : System.Attribute
{
    /// <summary>
    /// Summary For Attribute
    /// </summary>
    /// <param name=""someInteger"">Param someInteger</param>
    /// <param name=""someString"">Param someString</param>
    public SomethingAttribute(int someInteger, string someString) { }
}

[[|Something($$
|]class D
{
}";

            var expectedOrderedItems = new List<SignatureHelpTestItem>();
            expectedOrderedItems.Add(new SignatureHelpTestItem("SomethingAttribute(int someInteger, string someString)", "Summary For Attribute", "Param someInteger", currentParameterIndex: 0));

            await TestAsync(markup, expectedOrderedItems);
        }

        [Fact]
        public async Task TestInvocationWithParametersOn2()
        {
            var markup = @"
class SomethingAttribute : System.Attribute
{
    public SomethingAttribute(int someInteger, string someString) { }
}

[[|Something(22, $$|]]
class D
{
}";
            var expectedOrderedItems = new List<SignatureHelpTestItem>();
            expectedOrderedItems.Add(new SignatureHelpTestItem("SomethingAttribute(int someInteger, string someString)", string.Empty, string.Empty, currentParameterIndex: 1));

            await TestAsync(markup, expectedOrderedItems);
        }

        [Fact]
        public async Task TestInvocationWithParametersXmlComentsOn2()
        {
            var markup = @"
class SomethingAttribute : System.Attribute
{
    /// <summary>
    /// Summary For Attribute
    /// </summary>
    /// <param name=""someInteger"">Param someInteger</param>
    /// <param name=""someString"">Param someString</param>
    public SomethingAttribute(int someInteger, string someString) { }
}

[[|Something(22, $$
|]class D
{
}";

            var expectedOrderedItems = new List<SignatureHelpTestItem>();
            expectedOrderedItems.Add(new SignatureHelpTestItem("SomethingAttribute(int someInteger, string someString)", "Summary For Attribute", "Param someString", currentParameterIndex: 1));

            await TestAsync(markup, expectedOrderedItems);
        }

        [Fact]
        public async Task TestInvocationWithClosingParen()
        {
            var markup = @"
class SomethingAttribute : System.Attribute
{ }

[[|Something($$|])]
class D
{
}";

            var expectedOrderedItems = new List<SignatureHelpTestItem>();
            expectedOrderedItems.Add(new SignatureHelpTestItem("SomethingAttribute()", string.Empty, null, currentParameterIndex: 0));

            await TestAsync(markup, expectedOrderedItems);
        }

        [Fact]
        public async Task TestInvocationSpan1()
        {
            await TestAsync(
@"using System;

class C
{
    [[|Obsolete($$|])]
    void Goo()
    {
    }
}");
        }

        [Fact]
        public async Task TestInvocationSpan2()
        {
            await TestAsync(
@"using System;

class C
{
    [[|Obsolete($$|])]
    void Goo()
    {
    }
}");
        }

        [Fact]
        public async Task TestInvocationSpan3()
        {
            await TestAsync(
@"using System;

class C
{
    [[|Obsolete(

$$|]]
    void Goo()
    {
    }
}");
        }

        #endregion

        #region "Current Parameter Name"

        [Fact]
        public async Task TestCurrentParameterName()
        {
            var markup = @"
using System;

class SomethingAttribute : Attribute
{
    public SomethingAttribute(int someParameter, bool somethingElse) { }
}

[[|Something(somethingElse: false, someParameter: $$22|])]
class C
{
}";

            await VerifyCurrentParameterNameAsync(markup, "someParameter");
        }

        #endregion

        #region "Setting fields in attributes"

        [Fact, WorkItem("http://vstfdevdiv:8080/DevDiv2/DevDiv/_workitems/edit/544139")]
        [WorkItem("http://vstfdevdiv:8080/DevDiv2/DevDiv/_workitems/edit/545425")]
        public async Task TestAttributeWithValidField()
        {
            var markup = @"
class SomethingAttribute : System.Attribute
{
    public int goo;
}

[[|Something($$|])]
class D
{
}";

            var expectedOrderedItems = new List<SignatureHelpTestItem>();
            expectedOrderedItems.Add(new SignatureHelpTestItem($"SomethingAttribute({CSharpFeaturesResources.Properties}: [goo = int])", string.Empty, string.Empty, currentParameterIndex: 0));

            await TestAsync(markup, expectedOrderedItems, usePreviousCharAsTrigger: false);
        }

        [Fact]
        public async Task TestAttributeWithInvalidFieldReadonly()
        {
            var markup = @"
class SomethingAttribute : System.Attribute
{
    public readonly int goo;
}

[[|Something($$|])]
class D
{
}";

            var expectedOrderedItems = new List<SignatureHelpTestItem>();
            expectedOrderedItems.Add(new SignatureHelpTestItem("SomethingAttribute()", string.Empty, null, currentParameterIndex: 0));

            await TestAsync(markup, expectedOrderedItems);
        }

        [Fact]
        public async Task TestAttributeWithInvalidFieldStatic()
        {
            var markup = @"
class SomethingAttribute : System.Attribute
{
    public static int goo;
}

[[|Something($$|])]
class D
{
}";

            var expectedOrderedItems = new List<SignatureHelpTestItem>();
            expectedOrderedItems.Add(new SignatureHelpTestItem("SomethingAttribute()", string.Empty, null, currentParameterIndex: 0));

            await TestAsync(markup, expectedOrderedItems);
        }

        [Fact]
        public async Task TestAttributeWithInvalidFieldConst()
        {
            var markup = @"
class SomethingAttribute : System.Attribute
{
    public const int goo = 42;
}

[[|Something($$|])]
class D
{
}";

            var expectedOrderedItems = new List<SignatureHelpTestItem>();
            expectedOrderedItems.Add(new SignatureHelpTestItem("SomethingAttribute()", string.Empty, null, currentParameterIndex: 0));

            await TestAsync(markup, expectedOrderedItems);
        }

        #endregion

        #region "Setting properties in attributes"

        [Fact, WorkItem("http://vstfdevdiv:8080/DevDiv2/DevDiv/_workitems/edit/544139")]
        [WorkItem("http://vstfdevdiv:8080/DevDiv2/DevDiv/_workitems/edit/545425")]
        public async Task TestAttributeWithValidProperty()
        {
            var markup = @"
class SomethingAttribute : System.Attribute
{
    public int goo { get; set; }
}

[[|Something($$|])]
class D
{
}";

            var expectedOrderedItems = new List<SignatureHelpTestItem>();
            expectedOrderedItems.Add(new SignatureHelpTestItem($"SomethingAttribute({CSharpFeaturesResources.Properties}: [goo = int])", string.Empty, string.Empty, currentParameterIndex: 0));

            // TODO: Bug 12319: Enable tests for script when this is fixed.
            await TestAsync(markup, expectedOrderedItems, usePreviousCharAsTrigger: false);
        }

        [Fact]
        public async Task TestAttributeWithInvalidPropertyStatic()
        {
            var markup = @"
class SomethingAttribute : System.Attribute
{
    public static int goo { get; set; }
}

[[|Something($$|])]
class D
{
}";

            var expectedOrderedItems = new List<SignatureHelpTestItem>();
            expectedOrderedItems.Add(new SignatureHelpTestItem("SomethingAttribute()", string.Empty, null, currentParameterIndex: 0));

            await TestAsync(markup, expectedOrderedItems);
        }

        [Fact]
        public async Task TestAttributeWithInvalidPropertyNoSetter()
        {
            var markup = @"
class SomethingAttribute : System.Attribute
{
    public int goo { get { return 0; } }
}

[[|Something($$|])]
class D
{
}";

            var expectedOrderedItems = new List<SignatureHelpTestItem>();
            expectedOrderedItems.Add(new SignatureHelpTestItem("SomethingAttribute()", string.Empty, null, currentParameterIndex: 0));

            await TestAsync(markup, expectedOrderedItems);
        }

        [Fact]
        public async Task TestAttributeWithInvalidPropertyNoGetter()
        {
            var markup = @"
class SomethingAttribute : System.Attribute
{
    public int goo { set { } }
}

[[|Something($$|])]
class D
{
}";

            var expectedOrderedItems = new List<SignatureHelpTestItem>();
            expectedOrderedItems.Add(new SignatureHelpTestItem("SomethingAttribute()", string.Empty, null, currentParameterIndex: 0));

            await TestAsync(markup, expectedOrderedItems);
        }

        [Fact]
        public async Task TestAttributeWithInvalidPropertyPrivateGetter()
        {
            var markup = @"
class SomethingAttribute : System.Attribute
{
    public int goo { private get; set; }
}

[[|Something($$|])]
class D
{
}";

            var expectedOrderedItems = new List<SignatureHelpTestItem>();
            expectedOrderedItems.Add(new SignatureHelpTestItem("SomethingAttribute()", string.Empty, null, currentParameterIndex: 0));

            await TestAsync(markup, expectedOrderedItems);
        }

        [Fact]
        public async Task TestAttributeWithInvalidPropertyPrivateSetter()
        {
            var markup = @"
class SomethingAttribute : System.Attribute
{
    public int goo { get; private set; }
}

[[|Something($$|])]
class D
{
}";

            var expectedOrderedItems = new List<SignatureHelpTestItem>();
            expectedOrderedItems.Add(new SignatureHelpTestItem("SomethingAttribute()", string.Empty, null, currentParameterIndex: 0));

            await TestAsync(markup, expectedOrderedItems);
        }

        [Fact, WorkItem("https://github.com/dotnet/roslyn/issues/23664")]
        [WorkItem("https://github.com/dotnet/roslyn/issues/12544")]
        public async Task TestAttributeWithOverriddenProperty()
        {
            var markup = @"
cusing System;

class BaseAttribute : Attribute
{
    public virtual string Name { get; set; }
}

class DerivedAttribute : BaseAttribute
{
    public override string Name { get; set; }
}

[[|Derived($$|])]
class C
{

}";

            var expectedOrderedItems = new List<SignatureHelpTestItem>();
            expectedOrderedItems.Add(new SignatureHelpTestItem($"DerivedAttribute({CSharpFeaturesResources.Properties}: [Name = string])", string.Empty, string.Empty, currentParameterIndex: 0));

            await TestAsync(markup, expectedOrderedItems, usePreviousCharAsTrigger: false);
        }

        #endregion

        #region "Setting fields and arguments"

        [Fact, WorkItem("http://vstfdevdiv:8080/DevDiv2/DevDiv/_workitems/edit/544139")]
        [WorkItem("http://vstfdevdiv:8080/DevDiv2/DevDiv/_workitems/edit/545425")]
        public async Task TestAttributeWithArgumentsAndNamedParameters1()
        {
            var markup = @"
class SomethingAttribute : System.Attribute
{
    /// <param name=""goo"">GooParameter</param>
    /// <param name=""bar"">BarParameter</param>
    public SomethingAttribute(int goo = 0, string bar = null) { }
    public int fieldfoo { get; set; }
    public string fieldbar { get; set; }
}

[[|Something($$|])]
class D
{
}";

            var expectedOrderedItems = new List<SignatureHelpTestItem>();
            expectedOrderedItems.Add(new SignatureHelpTestItem($"SomethingAttribute([int goo = 0], [string bar = null], {CSharpFeaturesResources.Properties}: [fieldbar = string], [fieldfoo = int])", string.Empty, "GooParameter", currentParameterIndex: 0));

            // TODO: Bug 12319: Enable tests for script when this is fixed.
            await TestAsync(markup, expectedOrderedItems, usePreviousCharAsTrigger: false);
        }

        [Fact, WorkItem("http://vstfdevdiv:8080/DevDiv2/DevDiv/_workitems/edit/544139")]
        [WorkItem("http://vstfdevdiv:8080/DevDiv2/DevDiv/_workitems/edit/545425")]
        public async Task TestAttributeWithArgumentsAndNamedParameters2()
        {
            var markup = @"
class SomethingAttribute : System.Attribute
{
    /// <param name=""goo"">GooParameter</param>
    /// <param name=""bar"">BarParameter</param>
    public SomethingAttribute(int goo = 0, string bar = null) { }
    public int fieldfoo { get; set; }
    public string fieldbar { get; set; }
}

[[|Something(22, $$|])]
class D
{
}";

            var expectedOrderedItems = new List<SignatureHelpTestItem>();
            expectedOrderedItems.Add(new SignatureHelpTestItem($"SomethingAttribute([int goo = 0], [string bar = null], {CSharpFeaturesResources.Properties}: [fieldbar = string], [fieldfoo = int])", string.Empty, "BarParameter", currentParameterIndex: 1));

            // TODO: Bug 12319: Enable tests for script when this is fixed.
            await TestAsync(markup, expectedOrderedItems, usePreviousCharAsTrigger: false);
        }

        [Fact, WorkItem("http://vstfdevdiv:8080/DevDiv2/DevDiv/_workitems/edit/544139")]
        [WorkItem("http://vstfdevdiv:8080/DevDiv2/DevDiv/_workitems/edit/545425")]
        public async Task TestAttributeWithArgumentsAndNamedParameters3()
        {
            var markup = @"
class SomethingAttribute : System.Attribute
{
    /// <param name=""goo"">GooParameter</param>
    /// <param name=""bar"">BarParameter</param>
    public SomethingAttribute(int goo = 0, string bar = null) { }
    public int fieldfoo { get; set; }
    public string fieldbar { get; set; }
}

[[|Something(22, null, $$|])]
class D
{
}";

            var expectedOrderedItems = new List<SignatureHelpTestItem>();
            expectedOrderedItems.Add(new SignatureHelpTestItem($"SomethingAttribute([int goo = 0], [string bar = null], {CSharpFeaturesResources.Properties}: [fieldbar = string], [fieldfoo = int])", string.Empty, string.Empty, currentParameterIndex: 2));

            // TODO: Bug 12319: Enable tests for script when this is fixed.
            await TestAsync(markup, expectedOrderedItems, usePreviousCharAsTrigger: false);
        }

        [Fact, WorkItem("http://vstfdevdiv:8080/DevDiv2/DevDiv/_workitems/edit/544139")]
        [WorkItem("http://vstfdevdiv:8080/DevDiv2/DevDiv/_workitems/edit/545425")]
        public async Task TestAttributeWithOptionalArgumentAndNamedParameterWithSameName1()
        {
            var markup = @"
class SomethingAttribute : System.Attribute
{
    /// <param name=""goo"">GooParameter</param>
    public SomethingAttribute(int goo = 0) { }
    public int goo { get; set; }
}

[[|Something($$|])]
class D
{
}";

            var expectedOrderedItems = new List<SignatureHelpTestItem>();
            expectedOrderedItems.Add(new SignatureHelpTestItem($"SomethingAttribute([int goo = 0], {CSharpFeaturesResources.Properties}: [goo = int])", string.Empty, "GooParameter", currentParameterIndex: 0));

            // TODO: Bug 12319: Enable tests for script when this is fixed.
            await TestAsync(markup, expectedOrderedItems, usePreviousCharAsTrigger: false);
        }

        [Fact, WorkItem("http://vstfdevdiv:8080/DevDiv2/DevDiv/_workitems/edit/544139")]
        [WorkItem("http://vstfdevdiv:8080/DevDiv2/DevDiv/_workitems/edit/545425")]
        public async Task TestAttributeWithOptionalArgumentAndNamedParameterWithSameName2()
        {
            var markup = @"
class SomethingAttribute : System.Attribute
{
    /// <param name=""goo"">GooParameter</param>
    public SomethingAttribute(int goo = 0) { }
    public int goo { get; set; }
}

[[|Something(22, $$|])]
class D
{
}";

            var expectedOrderedItems = new List<SignatureHelpTestItem>();
            expectedOrderedItems.Add(new SignatureHelpTestItem($"SomethingAttribute([int goo = 0], {CSharpFeaturesResources.Properties}: [goo = int])", string.Empty, string.Empty, currentParameterIndex: 1));

            // TODO: Bug 12319: Enable tests for script when this is fixed.
            await TestAsync(markup, expectedOrderedItems, usePreviousCharAsTrigger: false);
        }

        #endregion

        #region "Trigger tests"

        [Fact]
        public async Task TestInvocationOnTriggerParens()
        {
            var markup = @"
using System;

class SomethingAttribute : Attribute
{
    public SomethingAttribute(int someParameter, bool somethingElse) { }
}

[[|Something($$|])]
class C
{
}";

            var expectedOrderedItems = new List<SignatureHelpTestItem>();
            expectedOrderedItems.Add(new SignatureHelpTestItem("SomethingAttribute(int someParameter, bool somethingElse)", string.Empty, string.Empty, currentParameterIndex: 0));

            await TestAsync(markup, expectedOrderedItems, usePreviousCharAsTrigger: true);
        }

        [Fact]
        public async Task TestInvocationOnTriggerComma()
        {
            var markup = @"
using System;

class SomethingAttribute : Attribute
{
    public SomethingAttribute(int someParameter, bool somethingElse) { }
}

[[|Something(22,$$|])]
class C
{
}";

            var expectedOrderedItems = new List<SignatureHelpTestItem>();
            expectedOrderedItems.Add(new SignatureHelpTestItem("SomethingAttribute(int someParameter, bool somethingElse)", string.Empty, string.Empty, currentParameterIndex: 1));

            await TestAsync(markup, expectedOrderedItems, usePreviousCharAsTrigger: true);
        }

        [Fact]
        public async Task TestNoInvocationOnSpace()
        {
            var markup = @"
using System;

class SomethingAttribute : Attribute
{
    public SomethingAttribute(int someParameter, bool somethingElse) { }
}

[[|Something(22, $$|])]
class C
{
}";

            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_Attribute_BrowsableAlways()
        {
            var markup = @"
[MyAttribute($$
class Program
{
}";

            var referencedCode = @"

public class MyAttribute
{
    [System.ComponentModel.EditorBrowsable(System.ComponentModel.EditorBrowsableState.Always)]
    public MyAttribute(int x)
    {
    }
}";

            var expectedOrderedItems = new List<SignatureHelpTestItem>();
            expectedOrderedItems.Add(new SignatureHelpTestItem("MyAttribute(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_Attribute_BrowsableNever()
        {
            var markup = @"
[MyAttribute($$
class Program
{
}";

            var referencedCode = @"

public class MyAttribute
{
    [System.ComponentModel.EditorBrowsable(System.ComponentModel.EditorBrowsableState.Never)]
    public MyAttribute(int x)
    {
    }
}";

            var expectedOrderedItems = new List<SignatureHelpTestItem>();
            expectedOrderedItems.Add(new SignatureHelpTestItem("MyAttribute(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_Attribute_BrowsableAdvanced()
        {
            var markup = @"
[MyAttribute($$
class Program
{
}";

            var referencedCode = @"

public class MyAttribute
{
    [System.ComponentModel.EditorBrowsable(System.ComponentModel.EditorBrowsableState.Advanced)]
    public MyAttribute(int x)
    {
    }
}";

            var expectedOrderedItems = new List<SignatureHelpTestItem>();
            expectedOrderedItems.Add(new SignatureHelpTestItem("MyAttribute(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,
                                                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_Attribute_BrowsableMixed()
        {
            var markup = @"
[MyAttribute($$
class Program
{
}";

            var referencedCode = @"

public class MyAttribute
{
    [System.ComponentModel.EditorBrowsable(System.ComponentModel.EditorBrowsableState.Always)]
    public MyAttribute(int x)
    {
    }

    [System.ComponentModel.EditorBrowsable(System.ComponentModel.EditorBrowsableState.Never)]
    public MyAttribute(int x, int y)
    {
    }
}";

            var expectedOrderedItemsMetadataReference = new List<SignatureHelpTestItem>();
            expectedOrderedItemsMetadataReference.Add(new SignatureHelpTestItem("MyAttribute(int x)", string.Empty, string.Empty, currentParameterIndex: 0));

            var expectedOrderedItemsSameSolution = new List<SignatureHelpTestItem>();
            expectedOrderedItemsSameSolution.Add(new SignatureHelpTestItem("MyAttribute(int x)", string.Empty, string.Empty, currentParameterIndex: 0));
            expectedOrderedItemsSameSolution.Add(new SignatureHelpTestItem("MyAttribute(int x, int 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 Secret : System.Attribute
    {
    }
#endif
    [Secret($$
    void Goo()
    {
    }
}
]]>
        </Document>
    </Project>
    <Project Language=""C#"" CommonReferences=""true"" AssemblyName=""Proj2"">
        <Document IsLinkFile=""true"" LinkAssemblyName=""Proj1"" LinkFilePath=""SourceDocument""/>
    </Project>
</Workspace>";
            var expectedDescription = new SignatureHelpTestItem($"Secret()\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, new[] { 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 Secret : System.Attribute
    {
    }
#endif

#if BAR
    [Secret($$
    void Goo()
    {
    }
#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($"Secret()\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, new[] { expectedDescription }, false);
        }

        [Fact, WorkItem("http://vstfdevdiv:8080/DevDiv2/DevDiv/_workitems/edit/1067933")]
        public async Task InvokedWithNoToken()
        {
            var markup = @"
// [goo($$";

            await TestAsync(markup);
        }

        [Fact, WorkItem("http://vstfdevdiv:8080/DevDiv2/DevDiv/_workitems/edit/1081535")]
        public async Task TestInvocationWithBadParameterList()
        {
            var markup = @"
class SomethingAttribute : System.Attribute
{
}

[Something{$$]
class D
{
}";

            var expectedOrderedItems = new List<SignatureHelpTestItem>();
            await TestAsync(markup, expectedOrderedItems);
        }
    }
}
