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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;
using System.Collections.Generic;
using System.Threading;
using System.Threading.Tasks;
using Microsoft.CodeAnalysis.Completion;
using Microsoft.CodeAnalysis.CSharp.Completion.Providers;
using Microsoft.CodeAnalysis.Editor.UnitTests.Workspaces;
using Microsoft.CodeAnalysis.Test.Utilities;
using Roslyn.Test.Utilities;
using Xunit;
namespace Microsoft.CodeAnalysis.Editor.CSharp.UnitTests.Completion.CompletionProviders;
[Trait(Traits.Feature, Traits.Features.Completion)]
public sealed class SuggestionModeCompletionProviderTests : AbstractCSharpCompletionProviderTests
{
internal override Type GetCompletionProviderType()
=> typeof(CSharpSuggestionModeCompletionProvider);
[Fact]
public Task AfterFirstExplicitArgument()
=> VerifyBuilderAsync(AddInsideMethod(@"Func<int, int, int> f = (int x, i $$"));
[Fact]
public Task AfterFirstImplicitArgument()
=> VerifyBuilderAsync(AddInsideMethod(@"Func<int, int, int> f = (x, i $$"));
[Fact]
public Task AfterFirstImplicitArgumentInMethodCall()
=> VerifyBuilderAsync("""
class c
{
private void bar(Func<int, int, bool> f) { }
private void goo()
{
bar((x, i $$
}
}
""");
[Fact]
public Task AfterFirstExplicitArgumentInMethodCall()
=> VerifyBuilderAsync("""
class c
{
private void bar(Func<int, int, bool> f) { }
private void goo()
{
bar((int x, i $$
}
}
""");
[Fact]
public Task DelegateTypeExpected1()
=> VerifyBuilderAsync("""
using System;
class c
{
private void bar(Func<int, int, bool> f) { }
private void goo()
{
bar($$
}
}
""");
[Fact]
public async Task DelegateTypeExpected2()
=> await VerifyBuilderAsync(AddUsingDirectives("using System;", AddInsideMethod(@"Func<int, int, int> f = $$")));
[Fact]
public Task ObjectInitializerDelegateType()
=> VerifyBuilderAsync("""
using System;
using System.Collections.Generic;
using System.Linq;
class Program
{
public Func<int> myfunc { get; set; }
}
class a
{
void goo()
{
var b = new Program() { myfunc = $$
}
}
""");
[Fact, WorkItem("http://vstfdevdiv:8080/DevDiv2/DevDiv/_workitems/edit/817145")]
public Task ExplicitArrayInitializer()
=> VerifyBuilderAsync("""
using System;
class a
{
void goo()
{
Func<int, int>[] myfunc = new Func<int, int>[] { $$;
}
}
""");
[Fact]
public Task ImplicitArrayInitializerUnknownType()
=> VerifyNotBuilderAsync("""
using System;
class a
{
void goo()
{
var a = new [] { $$;
}
}
""");
[Fact]
public Task ImplicitArrayInitializerKnownDelegateType()
=> VerifyBuilderAsync("""
using System;
class a
{
void goo()
{
var a = new [] { x => 2 * x, $$
}
}
""");
[Fact]
public Task TernaryOperatorUnknownType()
=> VerifyNotBuilderAsync("""
using System;
class a
{
void goo()
{
var a = true ? $$
}
}
""");
[Fact]
public Task TernaryOperatorKnownDelegateType1()
=> VerifyBuilderAsync("""
using System;
class a
{
void goo()
{
var a = true ? x => x * 2 : $$
}
}
""");
[Fact]
public Task TernaryOperatorKnownDelegateType2()
=> VerifyBuilderAsync("""
using System;
class a
{
void goo()
{
Func<int, int> a = true ? $$
}
}
""");
[Fact]
public Task OverloadTakesADelegate1()
=> VerifyBuilderAsync("""
using System;
class a
{
void goo(int a) { }
void goo(Func<int, int> a) { }
void bar()
{
this.goo($$
}
}
""");
[Fact]
public Task OverloadTakesDelegate2()
=> VerifyBuilderAsync("""
using System;
class a
{
void goo(int i, int a) { }
void goo(int i, Func<int, int> a) { }
void bar()
{
this.goo(1, $$
}
}
""");
[Fact]
public Task ExplicitCastToDelegate()
=> VerifyBuilderAsync("""
using System;
class a
{
void bar()
{
(Func<int, int>) ($$
}
}
""");
[Fact, WorkItem("http://vstfdevdiv:8080/DevDiv2/DevDiv/_workitems/edit/860580")]
public Task ReturnStatement()
=> VerifyBuilderAsync("""
using System;
class a
{
Func<int, int> bar()
{
return $$
}
}
""");
[Fact]
public Task BuilderInAnonymousType1()
=> VerifyBuilderAsync("""
using System;
class a
{
int bar()
{
var q = new {$$
}
}
""");
[Fact]
public Task BuilderInAnonymousType2()
=> VerifyBuilderAsync("""
using System;
class a
{
int bar()
{
var q = new {$$ 1, 2 };
}
}
""");
[Fact]
public Task BuilderInAnonymousType3()
=> VerifyBuilderAsync("""
using System;
class a
{
int bar()
{
var q = new {Name = 1, $$ };
}
}
""");
[Fact]
public async Task BuilderInFromClause()
{
var markup = """
using System;
using System.Linq;
class a
{
int bar()
{
var q = from $$
}
}
""";
await VerifyBuilderAsync(markup.ToString());
}
[Fact, WorkItem("http://vstfdevdiv:8080/DevDiv2/DevDiv/_workitems/edit/823968")]
public async Task BuilderInJoinClause()
{
var markup = """
using System;
using System.Linq;
using System.Collections.Generic;
class a
{
int bar()
{
var list = new List<int>();
var q = from a in list
join $$
}
}
""";
await VerifyBuilderAsync(markup.ToString());
}
[Fact, WorkItem("http://vstfdevdiv:8080/DevDiv2/DevDiv/_workitems/edit/544290")]
public Task ParenthesizedLambdaArgument()
=> VerifyBuilderAsync("""
using System;
class Program
{
static void Main(string[] args)
{
Console.CancelKeyPress += new ConsoleCancelEventHandler((a$$, e) => { });
}
}
""");
[Fact, WorkItem("http://vstfdevdiv:8080/DevDiv2/DevDiv/_workitems/edit/544379")]
public Task IncompleteParenthesizedLambdaArgument()
=> VerifyBuilderAsync("""
using System;
class Program
{
static void Main(string[] args)
{
Console.CancelKeyPress += new ConsoleCancelEventHandler((a$$
}
}
""");
[Fact, WorkItem("http://vstfdevdiv:8080/DevDiv2/DevDiv/_workitems/edit/544379")]
public Task IncompleteNestedParenthesizedLambdaArgument()
=> VerifyNotBuilderAsync("""
using System;
class Program
{
static void Main(string[] args)
{
Console.CancelKeyPress += new ConsoleCancelEventHandler(((a$$
}
}
""");
[Fact]
public Task ParenthesizedExpressionInVarDeclaration()
=> VerifyNotBuilderAsync("""
using System;
class Program
{
static void Main(string[] args)
{
var x = (a$$
}
}
""");
[Fact, WorkItem("https://github.com/dotnet/roslyn/issues/24432")]
public Task TestInObjectCreation()
=> VerifyNotBuilderAsync("""
using System;
class Program
{
static void Main()
{
Program x = new P$$
}
}
""");
[Fact, WorkItem("https://github.com/dotnet/roslyn/issues/24432")]
public Task TestInArrayCreation()
=> VerifyNotBuilderAsync("""
using System;
class Program
{
static void Main()
{
Program[] x = new $$
}
}
""");
[Fact, WorkItem("https://github.com/dotnet/roslyn/issues/24432")]
public Task TestInArrayCreation2()
=> VerifyNotBuilderAsync("""
using System;
class Program
{
static void Main()
{
Program[] x = new Pr$$
}
}
""");
[Fact]
public Task TupleExpressionInVarDeclaration()
=> VerifyNotBuilderAsync("""
using System;
class Program
{
static void Main(string[] args)
{
var x = (a$$, b)
}
}
""");
[Fact]
public Task TupleExpressionInVarDeclaration2()
=> VerifyNotBuilderAsync("""
using System;
class Program
{
static void Main(string[] args)
{
var x = (a, b$$)
}
}
""");
[Fact]
public Task IncompleteLambdaInActionDeclaration()
=> VerifyBuilderAsync("""
using System;
class Program
{
static void Main(string[] args)
{
System.Action x = (a$$, b)
}
}
""");
[Fact]
public Task TupleWithNamesInActionDeclaration()
=> VerifyNotBuilderAsync("""
using System;
class Program
{
static void Main(string[] args)
{
System.Action x = (a$$, b: b)
}
}
""");
[Fact]
public Task TupleWithNamesInActionDeclaration2()
=> VerifyNotBuilderAsync("""
using System;
class Program
{
static void Main(string[] args)
{
System.Action x = (a: a, b$$)
}
}
""");
[Fact]
public Task TupleWithNamesInVarDeclaration()
=> VerifyNotBuilderAsync("""
using System;
class Program
{
static void Main(string[] args)
{
var x = (a: a, b$$)
}
}
""");
[Fact, WorkItem("http://vstfdevdiv:8080/DevDiv2/DevDiv/_workitems/edit/546363")]
public Task BuilderForLinqExpression()
=> VerifyBuilderAsync("""
using System;
using System.Linq.Expressions;
public class Class
{
public void Goo(Expression<Action<int>> arg)
{
Goo($$
}
}
""");
[Fact, WorkItem("http://vstfdevdiv:8080/DevDiv2/DevDiv/_workitems/edit/546363")]
public Task NotInTypeParameter()
=> VerifyNotBuilderAsync("""
using System;
using System.Linq.Expressions;
public class Class
{
public void Goo(Expression<Action<int>> arg)
{
Enumerable.Empty<$$
}
}
""");
[Fact, WorkItem("http://vstfdevdiv:8080/DevDiv2/DevDiv/_workitems/edit/611477")]
public Task ExtensionMethodFaultTolerance()
=> VerifyBuilderAsync("""
using System;
using System.Collections;
using System.Collections.Generic;
using System.Linq;
namespace Outer
{
public struct ImmutableArray<T> : IEnumerable<T>
{
public IEnumerator<T> GetEnumerator()
{
throw new NotImplementedException();
}
IEnumerator IEnumerable.GetEnumerator()
{
throw new NotImplementedException();
}
}
public static class ReadOnlyArrayExtensions
{
public static ImmutableArray<TResult> Select<T, TResult>(this ImmutableArray<T> array, Func<T, TResult> selector)
{
throw new NotImplementedException();
}
}
namespace Inner
{
class Program
{
static void Main(string[] args)
{
args.Select($$
}
}
}
}
""");
[Fact, WorkItem("http://vstfdevdiv:8080/DevDiv2/DevDiv/_workitems/edit/834609")]
public Task LambdaWithAutomaticBraceCompletion()
=> VerifyBuilderAsync("""
using System;
using System;
public class Class
{
public void Goo()
{
EventHandler h = (s$$)
}
}
""");
[Fact, WorkItem("http://vstfdevdiv:8080/DevDiv2/DevDiv/_workitems/edit/858112")]
public Task ThisConstructorInitializer()
=> VerifyBuilderAsync("""
using System;
class X
{
X(Func<X> x) : this($$) { }
}
""");
[Fact, WorkItem("http://vstfdevdiv:8080/DevDiv2/DevDiv/_workitems/edit/858112")]
public Task BaseConstructorInitializer()
=> VerifyBuilderAsync("""
using System;
class B
{
public B(Func<B> x) {}
}
class D : B
{
D() : base($$) { }
}
""");
[Fact, WorkItem("http://vstfdevdiv:8080/DevDiv2/DevDiv/_workitems/edit/887842")]
public Task PreprocessorExpression()
=> VerifyBuilderAsync("""
class C
{
#if $$
}
""");
[Fact, WorkItem("http://vstfdevdiv:8080/DevDiv2/DevDiv/_workitems/edit/967254")]
public Task ImplicitArrayInitializerAfterNew()
=> VerifyNotBuilderAsync("""
using System;
class a
{
void goo()
{
int[] a = new $$;
}
}
""");
[Fact, WorkItem("https://github.com/dotnet/roslyn/issues/7213")]
public Task NamespaceDeclaration_Unqualified()
=> VerifyBuilderAsync(@"namespace $$");
[Fact, WorkItem("https://github.com/dotnet/roslyn/issues/7213")]
public Task NamespaceDeclaration_Qualified()
=> VerifyBuilderAsync(@"namespace A.$$");
[Fact, WorkItem("https://github.com/dotnet/roslyn/issues/7213")]
public Task FileScopedNamespaceDeclaration_Unqualified()
=> VerifyBuilderAsync(@"namespace $$;");
[Fact, WorkItem("https://github.com/dotnet/roslyn/issues/7213")]
public Task FileScopedNamespaceDeclaration_Qualified()
=> VerifyBuilderAsync(@"namespace A.$$;");
[Fact, WorkItem("https://github.com/dotnet/roslyn/issues/7213")]
public Task PartialClassName()
=> VerifyBuilderAsync(@"partial class $$");
[Fact, WorkItem("https://github.com/dotnet/roslyn/issues/7213")]
public Task PartialStructName()
=> VerifyBuilderAsync(@"partial struct $$");
[Fact, WorkItem("https://github.com/dotnet/roslyn/issues/7213")]
public Task PartialInterfaceName()
=> VerifyBuilderAsync(@"partial interface $$");
[Fact, WorkItem("https://github.com/dotnet/roslyn/issues/12818")]
public Task UnwrapParamsArray()
=> VerifyBuilderAsync("""
using System;
class C {
C(params Action<int>[] a) {
new C($$
}
}
""");
[Fact, WorkItem("https://github.com/dotnet/roslyn/issues/72225")]
public Task UnwrapParamsCollection()
=> VerifyBuilderAsync("""
using System;
using System.Collections.Generic;
class C
{
C(params IEnumerable<Action<int>> a)
{
new C($$
}
}
""");
[Fact, WorkItem("https://github.com/dotnet/roslyn/issues/12818")]
public Task DoNotUnwrapRegularArray()
=> VerifyNotBuilderAsync("""
using System;
class C {
C(Action<int>[] a) {
new C($$
}
}
""");
[Fact, WorkItem("https://github.com/dotnet/roslyn/issues/47662")]
public Task LambdaExpressionInImplicitObjectCreation()
=> VerifyBuilderAsync("""
using System;
class C {
C(Action<int> a) {
C c = new($$
}
}
""");
[Fact, WorkItem("https://github.com/dotnet/roslyn/issues/15443")]
public Task NotBuilderWhenDelegateInferredRightOfDotInInvocation()
=> VerifyNotBuilderAsync("""
class C {
Action a = Task.$$
}
""");
[Fact, WorkItem("https://github.com/dotnet/roslyn/issues/15443")]
public Task NotBuilderInTypeArgument()
=> VerifyNotBuilderAsync("""
namespace ConsoleApplication1
{
class Program
{
class N { }
static void Main(string[] args)
{
Program.N n = Load<Program.$$
}
static T Load<T>() => default(T);
}
}
""");
[Fact, WorkItem("https://github.com/dotnet/roslyn/issues/16176")]
public Task NotBuilderForLambdaAfterNew()
=> VerifyNotBuilderAsync("""
class C {
Action a = new $$
}
""");
[Fact, WorkItem("https://github.com/dotnet/roslyn/issues/20937")]
public Task AsyncLambda()
=> VerifyBuilderAsync("""
using System;
using System.Threading.Tasks;
class Program
{
public void B(Func<int, int, Task<int>> f) { }
void A()
{
B(async($$
""");
[Fact, WorkItem("https://github.com/dotnet/roslyn/issues/20937")]
public Task AsyncLambdaAfterComma()
=> VerifyBuilderAsync("""
using System;
using System.Threading.Tasks;
class Program
{
public void B(Func<int, int, Task<int>> f) { }
void A()
{
B(async(p1, $$
""");
[Fact, WorkItem("https://github.com/dotnet/roslyn/issues/28586")]
public Task WithExtensionAndInstanceMethod1()
=> VerifyBuilderAsync("""
using System;
public sealed class Goo
{
public void Bar()
{
}
}
public static class GooExtensions
{
public static void Bar(this Goo goo, Action<int> action)
{
}
}
public static class Repro
{
public static void ReproMethod(Goo goo)
{
goo.Bar(a$$
}
}
""");
[Fact, WorkItem("https://github.com/dotnet/roslyn/issues/28586")]
public Task WithExtensionAndInstanceMethod2()
=> VerifyBuilderAsync("""
using System;
public sealed class Goo
{
public void Bar()
{
}
}
public static class GooExtensions
{
public static void Bar(this Goo goo, Action<int> action)
{
}
}
public static class Repro
{
public static void ReproMethod(Goo goo)
{
goo.Bar(a$$)
}
}
""");
[Fact, WorkItem("https://github.com/dotnet/roslyn/issues/28586")]
public Task WithExtensionAndInstanceMethod3()
=> VerifyBuilderAsync("""
using System;
public sealed class Goo
{
public void Bar()
{
}
}
public static class GooExtensions
{
public static void Bar(this Goo goo, Action<int> action)
{
}
}
public static class Repro
{
public static void ReproMethod(Goo goo)
{
goo.Bar(($$
}
}
""");
[Fact, WorkItem("https://github.com/dotnet/roslyn/issues/28586")]
public Task WithExtensionAndInstanceMethod4()
=> VerifyBuilderAsync("""
using System;
public sealed class Goo
{
public void Bar()
{
}
}
public static class GooExtensions
{
public static void Bar(this Goo goo, Action<int> action)
{
}
}
public static class Repro
{
public static void ReproMethod(Goo goo)
{
goo.Bar(($$)
}
}
""");
[Fact, WorkItem("https://github.com/dotnet/roslyn/issues/28586")]
public Task WithExtensionAndInstanceMethod5()
=> VerifyBuilderAsync("""
using System;
public sealed class Goo
{
public void Bar()
{
}
}
public static class GooExtensions
{
public static void Bar(this Goo goo, Action<int> action)
{
}
}
public static class Repro
{
public static void ReproMethod(Goo goo)
{
goo.Bar(($$))
}
}
""");
[Fact, WorkItem("https://github.com/dotnet/roslyn/issues/28586")]
public Task WithExtensionAndInstanceMethod6()
=> VerifyBuilderAsync("""
using System;
public sealed class Goo
{
public void Bar()
{
}
}
public static class GooExtensions
{
public static void Bar(this Goo goo, Action<int> action)
{
}
}
public static class Repro
{
public static void ReproMethod(Goo goo)
{
goo.Bar((a, $$
}
}
""");
[Fact, WorkItem("https://github.com/dotnet/roslyn/issues/28586")]
public Task WithExtensionAndInstanceMethod7()
=> VerifyBuilderAsync("""
using System;
public sealed class Goo
{
public void Bar()
{
}
}
public static class GooExtensions
{
public static void Bar(this Goo goo, Action<int> action)
{
}
}
public static class Repro
{
public static void ReproMethod(Goo goo)
{
goo.Bar(async (a$$
}
}
""");
[Fact, WorkItem("https://github.com/dotnet/roslyn/issues/28586")]
public Task WithNonDelegateExtensionAndInstanceMethod1()
=> VerifyNotBuilderAsync("""
using System;
public sealed class Goo
{
public void Bar()
{
}
}
public static class GooExtensions
{
public static void Bar(this Goo goo, int val)
{
}
}
public static class Repro
{
public static void ReproMethod(Goo goo)
{
goo.Bar(a$$
}
}
""");
[Fact, WorkItem("https://github.com/dotnet/roslyn/issues/42368")]
public Task TestInDeclarationPattern()
=> VerifyBuilderAsync("""
class C
{
void M()
{
var e = new object();
if (e is int o$$)
}
}
""");
[Fact, WorkItem("https://github.com/dotnet/roslyn/issues/42368")]
public Task TestInDeclarationPattern2()
=> VerifyBuilderAsync("""
class C
{
void M()
{
var e = new object();
if (e is System.Collections.Generic.List<int> an$$)
}
}
""");
[Fact, WorkItem("https://github.com/dotnet/roslyn/issues/42368")]
public Task TestInRecursivePattern()
=> VerifyBuilderAsync("""
class C
{
int P { get; }
void M(C test)
{
if (test is { P: 1 } o$$)
}
}
""");
[Fact, WorkItem("https://github.com/dotnet/roslyn/issues/42368")]
public Task TestInPropertyPattern()
=> VerifyBuilderAsync("""
class C
{
int P { get; }
void M(C test)
{
if (test is { P: int o$$ })
}
}
""");
[Fact, WorkItem("https://github.com/dotnet/roslyn/issues/42368")]
public Task TestInAndPattern()
=> VerifyBuilderAsync("""
class C
{
void M()
{
var e = new object();
if (e is 1 and int a$$)
}
}
""");
[Fact, WorkItem("https://github.com/dotnet/roslyn/issues/42368")]
public Task TestInAndOrPattern()
=> VerifyBuilderAsync("""
class C
{
void M()
{
var e = new object();
if (e is (int or 1) and int a$$)
}
}
""");
[Fact, WorkItem("https://github.com/dotnet/roslyn/issues/42368")]
public Task TestInSwitchStatement()
=> VerifyBuilderAsync("""
class C
{
void M()
{
var e = new object();
switch (e)
{
case int o$$
}
}
}
""");
[Fact, WorkItem("https://github.com/dotnet/roslyn/issues/42368")]
public Task TestInSwitchExpression()
=> VerifyBuilderAsync("""
class C
{
void M()
{
var e = new object();
var result = e switch
{
int o$$
}
}
}
""");
[Fact, WorkItem("https://github.com/dotnet/roslyn/issues/42368")]
public Task TestMissingInNotPattern_Declaration()
=> VerifyNotBuilderAsync("""
class C
{
void M()
{
var e = new object();
if (e is not int o$$)
}
}
""");
[Fact, WorkItem("https://github.com/dotnet/roslyn/issues/42368")]
public Task TestMissingInNotPattern_Declaration2()
=> VerifyNotBuilderAsync("""
class C
{
void M()
{
var e = new object();
if (e is not (1 and int o$$))
}
}
""");
[Fact, WorkItem("https://github.com/dotnet/roslyn/issues/42368")]
public Task TestMissingInNotPattern_Recursive()
=> VerifyNotBuilderAsync("""
class C
{
int P { get; }
void M(C test)
{
if (test is not { P: 1 } o$$)
}
}
""");
[Fact, WorkItem("https://github.com/dotnet/roslyn/issues/42368")]
public Task TestMissingInOrPattern()
=> VerifyNotBuilderAsync("""
class C
{
void M()
{
var e = new object();
if (e is 1 or int o$$)
}
}
""");
[Fact, WorkItem("https://github.com/dotnet/roslyn/issues/42368")]
public Task TestMissingInAndOrPattern()
=> VerifyNotBuilderAsync("""
class C
{
void M()
{
var e = new object();
if (e is 1 or int and int o$$)
}
}
""");
[Fact, WorkItem("https://github.com/dotnet/roslyn/issues/42368")]
public Task TestMissingInRecursiveOrPattern()
=> VerifyNotBuilderAsync("""
class C
{
int P { get; }
void M(C test)
{
if (test is null or { P: 1 } o$$)
}
}
""");
[Theory, WorkItem("https://github.com/dotnet/roslyn/issues/46927"), CombinatorialData]
public Task FirstArgumentOfInvocation_NoParameter(bool hasTypedChar)
=> VerifyNotBuilderAsync($$"""
using System;
interface Foo
{
bool Bar() => true;
}
class P
{
void M(Foo f)
{
f.Bar({{(hasTypedChar ? "s" : "")}}$$
}
}
""");
[Theory, WorkItem("https://github.com/dotnet/roslyn/issues/46927"), CombinatorialData]
public async Task FirstArgumentOfInvocation_PossibleLambdaExpression(bool isLambda, bool hasTypedChar)
{
var overload = isLambda
? "bool Bar(Func<int, bool> predicate) => true;"
: "bool Bar(int x) => true;";
var markup = $$"""
using System;
interface Foo
{
bool Bar() => true;
{{overload}}
}
class P
{
void M(Foo f)
{
f.Bar({{(hasTypedChar ? "s" : "")}}$$
}
}
""";
if (isLambda)
{
await VerifyBuilderAsync(markup);
}
else
{
await VerifyNotBuilderAsync(markup);
}
}
[InlineData("params string[] x")]
[InlineData("string x = null, string y = null")]
[InlineData("string x = null, string y = null, params string[] z")]
[Theory, WorkItem("https://github.com/dotnet/roslyn/issues/49656")]
public Task FirstArgumentOfInvocation_WithOverloadAcceptEmptyArgumentList(string overloadParameterList)
=> VerifyBuilderAsync($$"""
using System;
interface Foo
{
bool Bar({{overloadParameterList}}) => true;
bool Bar(Func<int, bool> predicate) => true;
}
class P
{
void M(Foo f)
{
f.Bar($$)
}
}
""");
private async Task VerifyNotBuilderAsync(string markup)
=> await VerifyWorkerAsync(markup, isBuilder: false);
private async Task VerifyBuilderAsync(string markup)
=> await VerifyWorkerAsync(markup, isBuilder: true);
private async Task VerifyWorkerAsync(string markup, bool isBuilder)
{
MarkupTestFile.GetPosition(markup, out var code, out int position);
using var workspaceFixture = new CSharpTestWorkspaceFixture();
workspaceFixture.GetWorkspace(GetComposition());
var document1 = workspaceFixture.UpdateDocument(code, SourceCodeKind.Regular);
await CheckResultsAsync(document1, position, isBuilder);
if (await CanUseSpeculativeSemanticModelAsync(document1, position))
{
var document2 = workspaceFixture.UpdateDocument(code, SourceCodeKind.Regular, cleanBeforeUpdate: false);
await CheckResultsAsync(document2, position, isBuilder);
}
}
private async Task CheckResultsAsync(Document document, int position, bool isBuilder)
{
var triggerInfos = new List<CompletionTrigger>
{
CompletionTrigger.CreateInsertionTrigger('a'),
CompletionTrigger.Invoke,
CompletionTrigger.CreateDeletionTrigger('z')
};
var service = GetCompletionService(document.Project);
var provider = Assert.Single(service.GetTestAccessor().GetImportedAndBuiltInProviders([]));
foreach (var triggerInfo in triggerInfos)
{
var completionList = await service.GetTestAccessor().GetContextAsync(
provider, document, position, triggerInfo,
options: CompletionOptions.Default, cancellationToken: CancellationToken.None);
if (isBuilder)
{
Assert.NotNull(completionList);
Assert.True(completionList.SuggestionModeItem != null, "Expecting a suggestion mode, but none was present");
}
else
{
if (completionList != null)
{
Assert.True(completionList.SuggestionModeItem == null, "group.Builder == " + (completionList.SuggestionModeItem != null ? completionList.SuggestionModeItem.DisplayText : "null"));
}
}
}
}
}
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