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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.Threading.Tasks;
using Microsoft.CodeAnalysis.CodeStyle;
using Microsoft.CodeAnalysis.CSharp;
using Microsoft.CodeAnalysis.CSharp.CodeStyle;
using Microsoft.CodeAnalysis.CSharp.InitializeParameter;
using Microsoft.CodeAnalysis.Editor.UnitTests.CodeActions;
using Microsoft.CodeAnalysis.Test.Utilities;
using Microsoft.CodeAnalysis.Testing;
using Roslyn.Test.Utilities;
using Xunit;
namespace Microsoft.CodeAnalysis.Editor.CSharp.UnitTests.InitializeParameter;
using VerifyCS = CSharpCodeRefactoringVerifier<CSharpAddParameterCheckCodeRefactoringProvider>;
[UseExportProvider]
[Trait(Traits.Feature, Traits.Features.CodeActionsInitializeParameter)]
public class AddParameterCheckTests
{
[Fact]
public async Task TestEmptyFile()
{
var code = @"[||]";
await VerifyCS.VerifyRefactoringAsync(code, code);
}
[Fact]
public async Task TestSimpleReferenceType_AlreadyNullChecked()
{
var testCode = """
using System;
class C
{
public C([||]string s)
{
if (s is null)
{
throw new ArgumentNullException(nameof(s));
}
}
}
""";
await new VerifyCS.Test
{
LanguageVersion = LanguageVersion.CSharp11,
TestCode = testCode
}.RunAsync();
}
[Fact]
public async Task TestSimpleReferenceType()
{
await VerifyCS.VerifyRefactoringAsync(
"""
using System;
class C
{
public C([||]string s)
{
}
}
""",
"""
using System;
class C
{
public C(string s)
{
if (s is null)
{
throw new ArgumentNullException(nameof(s));
}
}
}
""");
}
[Fact]
public async Task TestSimpleReferenceType_CSharp6()
{
await new VerifyCS.Test
{
LanguageVersion = LanguageVersion.CSharp6,
TestCode = """
using System;
class C
{
public C([||]string s)
{
}
}
""",
FixedCode = """
using System;
class C
{
public C(string s)
{
if (s == null)
{
throw new ArgumentNullException(nameof(s));
}
}
}
"""
}.RunAsync();
}
[Fact]
public async Task TestNullable()
{
await VerifyCS.VerifyRefactoringAsync(
"""
using System;
class C
{
public C([||]int? i)
{
}
}
""",
"""
using System;
class C
{
public C(int? i)
{
if (i is null)
{
throw new ArgumentNullException(nameof(i));
}
}
}
""");
}
[Fact, WorkItem("https://github.com/dotnet/roslyn/issues/47030")]
public async Task TestNotOnOutParameter()
{
var code = """
class C
{
public C([||]out string s)
{
s = "";
}
}
""";
await VerifyCS.VerifyRefactoringAsync(code, code);
}
[Fact]
public async Task TestNotOnValueType()
{
var code = """
using System;
class C
{
public C([||]int i)
{
}
}
""";
await VerifyCS.VerifyRefactoringAsync(code, code);
}
[Fact]
public async Task TestNotOnInterfaceParameter()
{
var code = """
using System;
interface I
{
void M([||]string s);
}
""";
await VerifyCS.VerifyRefactoringAsync(code, code);
}
[Fact]
public async Task TestNotOnNullableParameter()
{
var code = """
#nullable enable
using System;
class C
{
void M([||]string? s)
{
}
}
""";
await VerifyCS.VerifyRefactoringAsync(code, code);
}
[Fact]
public async Task TestNotOnAbstractParameter()
{
var code = """
using System;
abstract class C
{
public abstract void M([||]string s);
}
""";
await VerifyCS.VerifyRefactoringAsync(code, code);
}
[Fact]
public async Task TestNotOnExternParameter()
{
var code = """
using System;
class C
{
extern void M([||]string s);
}
""";
await VerifyCS.VerifyRefactoringAsync(code, code);
}
[Theory]
[InlineData(LanguageVersion.CSharp11)]
[InlineData(LanguageVersion.CSharp8)]
public async Task TestNotOnPartialMethodDefinition1(LanguageVersion languageVersion)
{
var code = """
using System;
partial class C
{
partial void M([||]string s);
partial void M(string s)
{
}
}
""";
await new VerifyCS.Test
{
LanguageVersion = languageVersion,
TestCode = code
}.RunAsync();
}
[Fact]
public async Task TestNotOnExtendedPartialMethodDefinition1()
{
var code = """
using System;
partial class C
{
public partial void M([||]string s);
public partial void M(string s)
{
}
}
""";
await new VerifyCS.Test
{
LanguageVersion = LanguageVersion.CSharp9,
TestCode = code
}.RunAsync();
}
[Theory]
[InlineData(LanguageVersion.CSharp11)]
[InlineData(LanguageVersion.CSharp8)]
public async Task TestNotOnPartialMethodDefinition2(LanguageVersion languageVersion)
{
var code = """
using System;
partial class C
{
partial void M(string s)
{
}
partial void M([||]string s);
}
""";
await new VerifyCS.Test
{
LanguageVersion = languageVersion,
TestCode = code
}.RunAsync();
}
[Fact]
public async Task TestNotOnExtendedPartialMethodDefinition2()
{
var code = """
using System;
partial class C
{
public partial void M(string s)
{
}
public partial void M([||]string s);
}
""";
await new VerifyCS.Test
{
LanguageVersion = LanguageVersion.CSharp9,
TestCode = code
}.RunAsync();
}
[Fact]
public async Task TestOnPartialMethodImplementation1()
{
await VerifyCS.VerifyRefactoringAsync(
"""
using System;
partial class C
{
partial void M(string s);
partial void M([||]string s)
{
}
}
""",
"""
using System;
partial class C
{
partial void M(string s);
partial void M(string s)
{
if (s is null)
{
throw new ArgumentNullException(nameof(s));
}
}
}
""");
}
[Fact]
public async Task TestOnExtendedPartialMethodImplementation1()
{
await new VerifyCS.Test
{
LanguageVersion = LanguageVersion.CSharp9,
TestCode = """
using System;
partial class C
{
public partial void M(string s);
public partial void M([||]string s)
{
}
}
""",
FixedCode = """
using System;
partial class C
{
public partial void M(string s);
public partial void M(string s)
{
if (s is null)
{
throw new ArgumentNullException(nameof(s));
}
}
}
"""
}.RunAsync();
}
[Fact]
public async Task TestOnPartialMethodImplementation2()
{
await VerifyCS.VerifyRefactoringAsync(
"""
using System;
partial class C
{
partial void M([||]string s)
{
}
partial void M(string s);
}
""",
"""
using System;
partial class C
{
partial void M(string s)
{
if (s is null)
{
throw new ArgumentNullException(nameof(s));
}
}
partial void M(string s);
}
""");
}
[Fact]
public async Task TestOnExtendedPartialMethodImplementation2()
{
await new VerifyCS.Test
{
LanguageVersion = LanguageVersion.CSharp9,
TestCode = """
using System;
partial class C
{
public partial void M([||]string s)
{
}
public partial void M(string s);
}
""",
FixedCode = """
using System;
partial class C
{
public partial void M(string s)
{
if (s is null)
{
throw new ArgumentNullException(nameof(s));
}
}
public partial void M(string s);
}
"""
}.RunAsync();
}
[Fact]
public async Task TestUpdateExistingFieldAssignment()
{
await VerifyCS.VerifyRefactoringAsync(
"""
using System;
class C
{
private string _s;
public C([||]string s)
{
_s = s;
}
}
""",
"""
using System;
class C
{
private string _s;
public C(string s)
{
_s = s ?? throw new ArgumentNullException(nameof(s));
}
}
""");
}
[Fact]
public async Task TestMultiNullableParameters()
{
await new VerifyCS.Test
{
TestCode = """
using System;
class C
{
public C([||]string a, string b, string c)
{
}
}
""",
FixedCode = @$"using System;
class C
{{
public C(string a, string b, string c)
{{
if (string.IsNullOrEmpty(a))
{{
throw new ArgumentException($""{string.Format(FeaturesResources._0_cannot_be_null_or_empty, "{nameof(a)}").Replace("""
"
""", """
\"
""")}"", nameof(a));
}}
if (string.IsNullOrEmpty(b))
{{
throw new ArgumentException($""{string.Format(FeaturesResources._0_cannot_be_null_or_empty, "{nameof(b)}").Replace("""
"
""", """
\"
""")}"", nameof(b));
}}
if (string.IsNullOrEmpty(c))
{{
throw new ArgumentException($""{string.Format(FeaturesResources._0_cannot_be_null_or_empty, "{nameof(c)}").Replace("""
"
""", """
\"
""")}"", nameof(c));
}}
}}
}}",
CodeActionIndex = 3,
CodeActionEquivalenceKey = nameof(FeaturesResources.Add_null_checks_for_all_parameters)
}.RunAsync();
}
[Fact]
public async Task TestMultiNullableParametersSomeNullableReferenceTypes()
{
await new VerifyCS.Test
{
TestCode = """
#nullable enable
using System;
class C
{
public C([||]string a, string b, string? c)
{
}
}
""",
FixedCode = @$"#nullable enable
using System;
class C
{{
public C(string a, string b, string? c)
{{
if (string.IsNullOrEmpty(a))
{{
throw new ArgumentException($""{string.Format(FeaturesResources._0_cannot_be_null_or_empty, "{nameof(a)}").Replace("""
"
""", """
\"
""")}"", nameof(a));
}}
if (string.IsNullOrEmpty(b))
{{
throw new ArgumentException($""{string.Format(FeaturesResources._0_cannot_be_null_or_empty, "{nameof(b)}").Replace("""
"
""", """
\"
""")}"", nameof(b));
}}
}}
}}",
CodeActionIndex = 3,
CodeActionEquivalenceKey = nameof(FeaturesResources.Add_null_checks_for_all_parameters)
}.RunAsync();
}
[Fact]
public async Task TestCursorNotOnParameters()
{
var code = """
using System;
class C
{
public C(string a[|,|] string b, string c)
{
}
}
""";
await VerifyCS.VerifyRefactoringAsync(code, code);
}
[Fact]
public async Task TestMultiNullableWithCursorOnNonNullable()
{
await new VerifyCS.Test
{
TestCode = """
using System;
class C
{
public C(string a, [||]bool b, string c)
{
}
}
""",
FixedCode = @$"using System;
class C
{{
public C(string a, bool b, string c)
{{
if (string.IsNullOrEmpty(a))
{{
throw new ArgumentException($""{string.Format(FeaturesResources._0_cannot_be_null_or_empty, "{nameof(a)}").Replace("""
"
""", """
\"
""")}"", nameof(a));
}}
if (string.IsNullOrEmpty(c))
{{
throw new ArgumentException($""{string.Format(FeaturesResources._0_cannot_be_null_or_empty, "{nameof(c)}").Replace("""
"
""", """
\"
""")}"", nameof(c));
}}
}}
}}",
CodeActionIndex = 0,
CodeActionEquivalenceKey = nameof(FeaturesResources.Add_null_checks_for_all_parameters)
}.RunAsync();
}
[Fact]
public async Task TestMultiNullableNonNullable()
{
await new VerifyCS.Test
{
TestCode = """
using System;
class C
{
public C([||]string a, bool b, string c)
{
}
}
""",
FixedCode = @$"using System;
class C
{{
public C(string a, bool b, string c)
{{
if (string.IsNullOrEmpty(a))
{{
throw new ArgumentException($""{string.Format(FeaturesResources._0_cannot_be_null_or_empty, "{nameof(a)}").Replace("""
"
""", """
\"
""")}"", nameof(a));
}}
if (string.IsNullOrEmpty(c))
{{
throw new ArgumentException($""{string.Format(FeaturesResources._0_cannot_be_null_or_empty, "{nameof(c)}").Replace("""
"
""", """
\"
""")}"", nameof(c));
}}
}}
}}",
CodeActionIndex = 3,
CodeActionEquivalenceKey = nameof(FeaturesResources.Add_null_checks_for_all_parameters)
}.RunAsync();
}
[Fact]
public async Task TestMultiNullableStringsAndObjects()
{
await new VerifyCS.Test
{
TestCode = """
using System;
class C
{
public C([||]string a, object b, string c)
{
}
}
""",
FixedCode = @$"using System;
class C
{{
public C(string a, object b, string c)
{{
if (string.IsNullOrEmpty(a))
{{
throw new ArgumentException($""{string.Format(FeaturesResources._0_cannot_be_null_or_empty, "{nameof(a)}").Replace("""
"
""", """
\"
""")}"", nameof(a));
}}
if (b is null)
{{
throw new ArgumentNullException(nameof(b));
}}
if (string.IsNullOrEmpty(c))
{{
throw new ArgumentException($""{string.Format(FeaturesResources._0_cannot_be_null_or_empty, "{nameof(c)}").Replace("""
"
""", """
\"
""")}"", nameof(c));
}}
}}
}}",
CodeActionIndex = 3,
CodeActionEquivalenceKey = nameof(FeaturesResources.Add_null_checks_for_all_parameters)
}.RunAsync();
}
[Fact]
public async Task TestMultiNullableObjects()
{
await new VerifyCS.Test
{
TestCode = """
using System;
class C
{
public C([||]object a, object b, object c)
{
}
}
""",
FixedCode = """
using System;
class C
{
public C(object a, object b, object c)
{
if (a is null)
{
throw new ArgumentNullException(nameof(a));
}
if (b is null)
{
throw new ArgumentNullException(nameof(b));
}
if (c is null)
{
throw new ArgumentNullException(nameof(c));
}
}
}
""",
CodeActionIndex = 1,
CodeActionEquivalenceKey = nameof(FeaturesResources.Add_null_checks_for_all_parameters)
}.RunAsync();
}
[Fact]
public async Task TestMultiNullableStructs()
{
await new VerifyCS.Test
{
TestCode = """
using System;
class C
{
public C([||]int ? a, bool ? b, double ? c)
{
}
}
""",
FixedCode = """
using System;
class C
{
public C(int ? a, bool ? b, double ? c)
{
if (a is null)
{
throw new ArgumentNullException(nameof(a));
}
if (b is null)
{
throw new ArgumentNullException(nameof(b));
}
if (c is null)
{
throw new ArgumentNullException(nameof(c));
}
}
}
""",
CodeActionIndex = 1,
CodeActionEquivalenceKey = nameof(FeaturesResources.Add_null_checks_for_all_parameters)
}.RunAsync();
}
[Fact]
public async Task TestUpdateExistingPropertyAssignment()
{
await VerifyCS.VerifyRefactoringAsync(
"""
using System;
class C
{
private string S;
public C([||]string s)
{
S = s;
}
}
""",
"""
using System;
class C
{
private string S;
public C(string s)
{
S = s ?? throw new ArgumentNullException(nameof(s));
}
}
""");
}
[Fact]
public async Task DoNotUseThrowExpressionBeforeCSharp7()
{
await new VerifyCS.Test
{
LanguageVersion = LanguageVersion.CSharp6,
TestCode = """
using System;
class C
{
private string S;
public C([||]string s)
{
S = s;
}
}
""",
FixedCode = """
using System;
class C
{
private string S;
public C(string s)
{
if (s == null)
{
throw new ArgumentNullException(nameof(s));
}
S = s;
}
}
"""
}.RunAsync();
}
[Fact]
public async Task RespectUseThrowExpressionOption()
{
await new VerifyCS.Test
{
TestCode = """
using System;
class C
{
private string S;
public C([||]string s)
{
S = s;
}
}
""",
FixedCode = """
using System;
class C
{
private string S;
public C(string s)
{
if (s is null)
{
throw new ArgumentNullException(nameof(s));
}
S = s;
}
}
""",
Options =
{
{ CSharpCodeStyleOptions.PreferThrowExpression, false, NotificationOption2.Silent }
}
}.RunAsync();
}
[Fact]
public async Task TestUpdateExpressionBody1()
{
await VerifyCS.VerifyRefactoringAsync(
"""
using System;
class C
{
private string S;
public C([||]string s)
=> S = s;
}
""",
"""
using System;
class C
{
private string S;
public C(string s)
=> S = s ?? throw new ArgumentNullException(nameof(s));
}
""");
}
[Fact]
public async Task TestUpdateExpressionBody2()
{
await VerifyCS.VerifyRefactoringAsync(
"""
using System;
class C
{
public C([||]string s)
=> Init();
private void Init()
{
}
}
""",
"""
using System;
class C
{
public C(string s)
{
if (s is null)
{
throw new ArgumentNullException(nameof(s));
}
Init();
}
private void Init()
{
}
}
""");
}
[Fact]
public async Task TestUpdateExpressionBody3()
{
await new VerifyCS.Test
{
TestCode = """
using System;
class C
{
public C([||]string s)
=> Init();
private void Init()
{
}
}
""",
FixedCode = """
using System;
class C
{
public C(string s)
{
if (s is null)
{
throw new ArgumentNullException(nameof(s));
}
Init();
}
private void Init()
{
}
}
""",
Options =
{
{ CSharpCodeStyleOptions.PreferExpressionBodiedConstructors, CSharpCodeStyleOptions.WhenPossibleWithSuggestionEnforcement }
}
}.RunAsync();
}
[Fact, WorkItem("https://github.com/dotnet/roslyn/issues/20983")]
public async Task TestUpdateLocalFunctionExpressionBody_NonVoid()
{
await VerifyCS.VerifyRefactoringAsync(
"""
using System;
class C
{
void M()
{
int F([||]string s) => Init();
}
private int Init() => 1;
}
""",
"""
using System;
class C
{
void M()
{
int F(string s)
{
if (s is null)
{
throw new ArgumentNullException(nameof(s));
}
return Init();
}
}
private int Init() => 1;
}
""");
}
[Fact, WorkItem("https://github.com/dotnet/roslyn/issues/20983")]
public async Task TestUpdateLocalFunctionExpressionBody_Void()
{
await VerifyCS.VerifyRefactoringAsync(
"""
using System;
class C
{
void M()
{
void F([||]string s) => Init();
}
private int Init() => 1;
}
""",
"""
using System;
class C
{
void M()
{
void F(string s)
{
if (s is null)
{
throw new ArgumentNullException(nameof(s));
}
Init();
}
}
private int Init() => 1;
}
""");
}
[Fact, WorkItem("https://github.com/dotnet/roslyn/issues/20983")]
public async Task TestUpdateLambdaExpressionBody_NonVoid()
{
await VerifyCS.VerifyRefactoringAsync(
"""
using System;
class C
{
void M()
{
Func<string, int> f = [||]s => GetValue();
int GetValue() => 0;
}
}
""",
"""
using System;
class C
{
void M()
{
Func<string, int> f = s =>
{
if (s is null)
{
throw new ArgumentNullException(nameof(s));
}
return GetValue();
};
int GetValue() => 0;
}
}
""");
}
[Fact, WorkItem("https://github.com/dotnet/roslyn/issues/20983")]
public async Task TestUpdateLambdaExpressionBody_Void()
{
await VerifyCS.VerifyRefactoringAsync(
"""
using System;
class C
{
void M()
{
Action<string> f = [||]s => NoValue();
void NoValue() { }
}
}
""",
"""
using System;
class C
{
void M()
{
Action<string> f = s =>
{
if (s is null)
{
throw new ArgumentNullException(nameof(s));
}
NoValue();
};
void NoValue() { }
}
}
""");
}
[Fact]
public async Task TestInsertAfterExistingNullCheck1()
{
await VerifyCS.VerifyRefactoringAsync(
"""
using System;
class C
{
public C(string a, [||]string s)
{
if (a == null)
{
}
}
}
""",
"""
using System;
class C
{
public C(string a, string s)
{
if (a == null)
{
}
if (s is null)
{
throw new ArgumentNullException(nameof(s));
}
}
}
""");
}
[Fact]
public async Task TestInsertBeforeExistingNullCheck1()
{
await VerifyCS.VerifyRefactoringAsync(
"""
using System;
class C
{
public C(string [||]a, string s)
{
if (s == null)
{
}
}
}
""",
"""
using System;
class C
{
public C(string a, string s)
{
if (a is null)
{
throw new ArgumentNullException(nameof(a));
}
if (s == null)
{
}
}
}
""");
}
[Fact]
public async Task TestMissingWithExistingNullCheck1()
{
var code = """
using System;
class C
{
public C([||]string s)
{
if (s == null)
{
throw new ArgumentNullException();
}
}
}
""";
await VerifyCS.VerifyRefactoringAsync(code, code);
}
[Fact]
public async Task TestMissingWithExistingNullCheck2()
{
var code = """
using System;
class C
{
private string _s;
public C([||]string s)
{
_s = s ?? throw new ArgumentNullException();
}
}
""";
await VerifyCS.VerifyRefactoringAsync(code, code);
}
[Fact]
public async Task TestMissingWithExistingNullCheck3()
{
var code = """
using System;
class C
{
public C([||]string s)
{
if (string.IsNullOrEmpty(s))
{
}
}
}
""";
await VerifyCS.VerifyRefactoringAsync(code, code);
}
[Fact]
public async Task TestMissingWithExistingNullCheck4()
{
var code = """
using System;
class C
{
public C([||]string s)
{
if (string.IsNullOrWhiteSpace(s))
{
}
}
}
""";
await VerifyCS.VerifyRefactoringAsync(code, code);
}
[Fact]
public async Task TestMissingWithExistingNullCheck5()
{
var code = """
using System;
class C
{
public C([||]string s)
{
if (null == s)
{
throw new ArgumentNullException();
}
}
}
""";
await VerifyCS.VerifyRefactoringAsync(code, code);
}
[Fact]
public async Task TestMissingWithExistingNullCheck6()
{
var code = """
using System;
class C
{
public C([||]string s)
{
if (s is null)
{
throw new ArgumentNullException();
}
}
}
""";
await VerifyCS.VerifyRefactoringAsync(code, code);
}
[Fact, WorkItem("https://github.com/dotnet/roslyn/issues/20983")]
public async Task TestMissingWithExistingNullCheckInLocalFunction()
{
var code = """
using System;
class C
{
public C()
{
void F([||]string s)
{
if (s == null)
{
throw new ArgumentNullException();
}
}
}
}
""";
await VerifyCS.VerifyRefactoringAsync(code, code);
}
[Fact, WorkItem("https://github.com/dotnet/roslyn/issues/20983")]
public async Task TestMissingWithExistingNullCheckInLambda()
{
var code = """
using System;
class C
{
public C()
{
Action<string> f = ([||]string s) => { if (s == null) { throw new ArgumentNullException(nameof(s)); } };
}
}
""";
await VerifyCS.VerifyRefactoringAsync(code, code);
}
[Fact]
public async Task TestMissingWithoutParameterName()
{
var code = """
using System;
class C
{
public C([||]string{|CS1001:)|}
{
}
}
""";
await VerifyCS.VerifyRefactoringAsync(code, code);
}
[Fact]
public async Task TestInMethod()
{
await VerifyCS.VerifyRefactoringAsync(
"""
using System;
class C
{
void F([||]string s)
{
}
}
""",
"""
using System;
class C
{
void F(string s)
{
if (s is null)
{
throw new ArgumentNullException(nameof(s));
}
}
}
""");
}
[Fact]
public async Task TestInOperator()
{
await VerifyCS.VerifyRefactoringAsync(
"""
using System;
class C
{
public static C operator +(C c1, [||]string s)
{
return null;
}
}
""",
"""
using System;
class C
{
public static C operator +(C c1, [||]string s)
{
if (s is null)
{
throw new ArgumentNullException(nameof(s));
}
return null;
}
}
""");
}
[Fact, WorkItem("https://github.com/dotnet/roslyn/issues/20983")]
public async Task TestOnSimpleLambdaParameter()
{
await VerifyCS.VerifyRefactoringAsync(
"""
using System;
class C
{
public C()
{
Func<string, int> f = [||]s => { return 0; };
}
}
""",
"""
using System;
class C
{
public C()
{
Func<string, int> f = s =>
{
if (s is null)
{
throw new ArgumentNullException(nameof(s));
}
return 0;
};
}
}
""");
}
[Fact, WorkItem("https://github.com/dotnet/roslyn/issues/20983")]
public async Task TestOnSimpleLambdaParameter_EmptyBlock()
{
await VerifyCS.VerifyRefactoringAsync(
"""
using System;
class C
{
public C()
{
Action<string> f = [||]s => { };
}
}
""",
"""
using System;
class C
{
public C()
{
Action<string> f = s =>
{
if (s is null)
{
throw new ArgumentNullException(nameof(s));
}
};
}
}
""");
}
[Fact, WorkItem("https://github.com/dotnet/roslyn/issues/20983")]
public async Task TestOnParenthesizedLambdaParameter()
{
await VerifyCS.VerifyRefactoringAsync(
"""
using System;
class C
{
public C()
{
Func<string, int> f = ([||]string s) => { return 0; };
}
}
""",
"""
using System;
class C
{
public C()
{
Func<string, int> f = (string s) =>
{
if (s is null)
{
throw new ArgumentNullException(nameof(s));
}
return 0;
};
}
}
""");
}
[Fact, WorkItem("https://github.com/dotnet/roslyn/issues/20983")]
public async Task TestOnDiscardLambdaParameter1()
{
await new VerifyCS.Test
{
LanguageVersion = LanguageVersion.CSharp11,
TestCode = """
using System;
class C
{
public C()
{
Func<string, int> f = ([||]_) => { return 0; };
}
}
""",
FixedCode = """
using System;
class C
{
public C()
{
Func<string, int> f = (_) =>
{
if (_ is null)
{
throw new ArgumentNullException(nameof(_));
}
return 0;
};
}
}
"""
}.RunAsync();
}
[Fact, WorkItem("https://github.com/dotnet/roslyn/issues/20983")]
public async Task TestOnDiscardLambdaParameter2()
{
var testCode = """
using System;
class C
{
public C()
{
Func<string, string, int> f = ([||]_, _) => { return 0; };
}
}
""";
await new VerifyCS.Test
{
LanguageVersion = LanguageVersion.CSharp11,
TestCode = testCode
}.RunAsync();
}
[Fact, WorkItem("https://github.com/dotnet/roslyn/issues/20983")]
public async Task TestOnAnonymousMethodParameter()
{
await VerifyCS.VerifyRefactoringAsync(
"""
using System;
class C
{
public C()
{
Func<string, int> f = delegate ([||]string s) { return 0; };
}
}
""",
"""
using System;
class C
{
public C()
{
Func<string, int> f = delegate (string s)
{
if (s is null)
{
throw new ArgumentNullException(nameof(s));
}
return 0;
};
}
}
""");
}
[Fact, WorkItem("https://github.com/dotnet/roslyn/issues/20983")]
public async Task TestOnLocalFunctionParameter()
{
await VerifyCS.VerifyRefactoringAsync(
"""
using System;
class C
{
public C()
{
void F([||]string s)
{
}
}
}
""",
"""
using System;
class C
{
public C()
{
void F(string s)
{
if (s is null)
{
throw new ArgumentNullException(nameof(s));
}
}
}
}
""");
}
[Fact]
public async Task TestNotOnIndexerParameter()
{
var code = """
class C
{
int this[[||]string s]
{
get
{
return 0;
}
}
}
""";
await VerifyCS.VerifyRefactoringAsync(code, code);
}
[Fact, WorkItem("https://github.com/dotnet/roslyn/issues/63307")]
public async Task TestNotOnIndexerParameterInRecordWithParameter()
{
var code = """
record R(string S)
{
int this[[||]string s]
{
get
{
return 0;
}
}
}
""";
await new VerifyCS.Test
{
TestCode = code,
LanguageVersion = LanguageVersion.CSharp11,
ReferenceAssemblies = ReferenceAssemblies.Net.Net50,
}.RunAsync();
}
[Fact]
public async Task TestNotOnIndexerParameters()
{
var code = """
class C
{
int this[[|object a|], object b, object c]
{
get
{
return 0;
}
}
}
""";
await VerifyCS.VerifyRefactoringAsync(code, code);
}
[Fact]
public async Task TestSpecialStringCheck1()
{
await new VerifyCS.Test
{
TestCode = """
using System;
class C
{
public C([||]string s)
{
}
}
""",
FixedCode = $@"using System;
class C
{{
public C(string s)
{{
if (string.IsNullOrEmpty(s))
{{
throw new ArgumentException($""{string.Format(FeaturesResources._0_cannot_be_null_or_empty, "{nameof(s)}").Replace("""
"
""", """
\"
""")}"", nameof(s));
}}
}}
}}",
CodeActionIndex = 1,
CodeActionEquivalenceKey = nameof(FeaturesResources.Add_string_IsNullOrEmpty_check)
}.RunAsync();
}
[Fact]
public async Task TestSpecialStringCheck2()
{
await new VerifyCS.Test
{
TestCode = """
using System;
class C
{
public C([||]string s)
{
}
}
""",
FixedCode = $@"using System;
class C
{{
public C(string s)
{{
if (string.IsNullOrWhiteSpace(s))
{{
throw new ArgumentException($""{string.Format(FeaturesResources._0_cannot_be_null_or_whitespace, "{nameof(s)}").Replace("""
"
""", """
\"
""")}"", nameof(s));
}}
}}
}}",
CodeActionIndex = 2,
CodeActionEquivalenceKey = nameof(FeaturesResources.Add_string_IsNullOrWhiteSpace_check)
}.RunAsync();
}
[Fact, WorkItem("https://github.com/dotnet/roslyn/issues/51338")]
[UseCulture("de-DE", "de-DE")]
public async Task TestSpecialStringCheck3()
{
await new VerifyCS.Test
{
TestCode = """
using System;
class C
{
public C([||]string s)
{
}
}
""",
FixedCode = $@"using System;
class C
{{
public C(string s)
{{
if (string.IsNullOrEmpty(s))
{{
throw new ArgumentException($""{string.Format(FeaturesResources._0_cannot_be_null_or_empty, "{nameof(s)}").Replace("""
"
""", """
\"
""")}"", nameof(s));
}}
}}
}}",
CodeActionIndex = 1,
CodeActionEquivalenceKey = nameof(FeaturesResources.Add_string_IsNullOrEmpty_check)
}.RunAsync();
}
[Fact, WorkItem("https://github.com/dotnet/roslyn/issues/19173")]
public async Task TestMissingOnUnboundTypeWithExistingNullCheck()
{
var code = """
class C
{
public C(string [||]s)
{
if (s == null)
{
throw new System.Exception();
}
}
}
""";
await VerifyCS.VerifyRefactoringAsync(code, code);
}
[Fact, WorkItem("https://github.com/dotnet/roslyn/issues/19174")]
public async Task TestRespectPredefinedTypePreferences()
{
await new VerifyCS.Test
{
TestCode = """
using System;
class Program
{
static void Main([||]String bar)
{
}
}
""",
FixedCode = @$"using System;
class Program
{{
static void Main(String bar)
{{
if (String.IsNullOrEmpty(bar))
{{
throw new ArgumentException($""{string.Format(FeaturesResources._0_cannot_be_null_or_empty, "{nameof(bar)}").Replace("""
"
""", """
\"
""")}"", nameof(bar));
}}
}}
}}",
CodeActionIndex = 1,
CodeActionEquivalenceKey = nameof(FeaturesResources.Add_string_IsNullOrEmpty_check),
Options =
{
{ CodeStyleOptions2.PreferIntrinsicPredefinedTypeKeywordInMemberAccess, CodeStyleOption2.FalseWithSuggestionEnforcement }
}
}.RunAsync();
}
[Theory, WorkItem("https://github.com/dotnet/roslyn/issues/19172")]
[InlineData((int)PreferBracesPreference.None)]
[InlineData((int)PreferBracesPreference.WhenMultiline)]
public async Task TestPreferNoBlock(int preferBraces)
{
await new VerifyCS.Test
{
TestCode = """
using System;
class C
{
public C([||]string s)
{
}
}
""",
FixedCode = """
using System;
class C
{
public C(string s)
{
if (s is null) throw new ArgumentNullException(nameof(s));
}
}
""",
Options =
{
{ CSharpCodeStyleOptions.PreferBraces, new CodeStyleOption2<PreferBracesPreference>((PreferBracesPreference)preferBraces, NotificationOption2.Silent) },
}
}.RunAsync();
}
[Fact, WorkItem("https://github.com/dotnet/roslyn/issues/19956")]
public async Task TestNoBlock()
{
await new VerifyCS.Test
{
TestCode = """
using System;
class C
{
public C(string s[||])
}
""",
ExpectedDiagnostics = {
// /0/Test0.cs(6,12): error CS0501: 'C.C(string)' must declare a body because it is not marked abstract, extern, or partial
DiagnosticResult.CompilerError("CS0501").WithLocation(5, 12).WithArguments("C.C(string)"),
// /0/Test0.cs(6,23): error CS1002: ; expected
DiagnosticResult.CompilerError("CS1002").WithLocation(5, 23),
},
FixedState =
{
Sources = { """
using System;
class C
{
public C(string s)
{
if (s is null)
{
throw new ArgumentNullException(nameof(s));
}
}
}
""" },
InheritanceMode = StateInheritanceMode.Explicit
}
}.RunAsync();
}
[Fact, WorkItem("https://github.com/dotnet/roslyn/issues/21501")]
public async Task TestInArrowExpression1()
{
await VerifyCS.VerifyRefactoringAsync(
"""
using System;
using System.Linq;
class C
{
public int Foo(int[] array[||]) =>
array.Where(x => x > 3)
.OrderBy(x => x)
.Count();
}
""",
"""
using System;
using System.Linq;
class C
{
public int Foo(int[] array)
{
if (array is null)
{
throw new ArgumentNullException(nameof(array));
}
return array.Where(x => x > 3)
.OrderBy(x => x)
.Count();
}
}
""");
}
[Fact, WorkItem("https://github.com/dotnet/roslyn/issues/21501")]
public async Task TestInArrowExpression2()
{
await VerifyCS.VerifyRefactoringAsync(
"""
using System;
using System.Linq;
class C
{
public int Foo(int[] array[||]) /* Bar */ => /* Bar */
array.Where(x => x > 3)
.OrderBy(x => x)
.Count(); /* Bar */
}
""",
"""
using System;
using System.Linq;
class C
{
public int Foo(int[] array) /* Bar */
{
if (array is null)
{
throw new ArgumentNullException(nameof(array));
}
/* Bar */
return array.Where(x => x > 3)
.OrderBy(x => x)
.Count(); /* Bar */
}
}
""");
}
[Fact, WorkItem("https://github.com/dotnet/roslyn/issues/21501")]
public async Task TestMissingInArrowExpression1()
{
var code = """
using System;
using System.Linq;
class C
{
public void Foo(string bar[||]) =>
#if DEBUG
Console.WriteLine("debug" + bar);
#else
Console.WriteLine("release" + bar);
#endif
}
""";
await VerifyCS.VerifyRefactoringAsync(code, code);
}
[Fact, WorkItem("https://github.com/dotnet/roslyn/issues/21501")]
public async Task TestMissingInArrowExpression2()
{
var code = """
using System;
using System.Linq;
class C
{
public int Foo(int[] array[||]) =>
#if DEBUG
array.Where(x => x > 3)
.OrderBy(x => x)
.Count();
#else
array.Where(x => x > 3)
.OrderBy(x => x)
.Count();
#endif
}
""";
await VerifyCS.VerifyRefactoringAsync(code, code);
}
[Fact, WorkItem("https://github.com/dotnet/roslyn/issues/21501")]
public async Task TestInArrowExpression3()
{
await VerifyCS.VerifyRefactoringAsync(
"""
using System;
using System.Linq;
class C
{
public void Foo(int[] array[||]) =>
array.Where(x => x > 3)
.OrderBy(x => x)
.Count();
}
""",
"""
using System;
using System.Linq;
class C
{
public void Foo(int[] array)
{
if (array is null)
{
throw new ArgumentNullException(nameof(array));
}
array.Where(x => x > 3)
.OrderBy(x => x)
.Count();
}
}
""");
}
[Fact, WorkItem("https://github.com/dotnet/roslyn/issues/29190")]
public async Task TestSimpleReferenceTypeWithParameterNameSelected1()
{
await VerifyCS.VerifyRefactoringAsync(
"""
using System;
class C
{
public C(string [|s|])
{
}
}
""",
"""
using System;
class C
{
public C(string s)
{
if (s is null)
{
throw new ArgumentNullException(nameof(s));
}
}
}
""");
}
[Fact, WorkItem("https://github.com/dotnet/roslyn/issues/29333")]
public async Task TestLambdaWithIncorrectNumberOfParameters()
{
var code = """
using System;
class C
{
void M(Action<int, int> a)
{
M((x[||]
}
}
""";
await VerifyCS.VerifyRefactoringAsync(code,
[
// /0/Test0.cs(7,12): error CS0103: The name 'x' does not exist in the current context
DiagnosticResult.CompilerError("CS0103").WithSpan(7, 12, 7, 13).WithArguments("x"),
// /0/Test0.cs(7,13): error CS1002: ; expected
DiagnosticResult.CompilerError("CS1002").WithSpan(7, 13, 7, 13),
// /0/Test0.cs(7,13): error CS1026: ) expected
DiagnosticResult.CompilerError("CS1026").WithSpan(7, 13, 7, 13),
// /0/Test0.cs(7,13): error CS1026: ) expected
DiagnosticResult.CompilerError("CS1026").WithSpan(7, 13, 7, 13),
], code);
}
[Fact, WorkItem("https://github.com/dotnet/roslyn/issues/41824")]
public async Task TestMissingInArgList()
{
var code = """
class C
{
private static void M()
{
M2(__arglist(1, 2, 3, 5, 6));
}
public static void M2([||]__arglist)
{
}
}
""";
await VerifyCS.VerifyRefactoringAsync(code, code);
}
[Fact, WorkItem("https://github.com/dotnet/roslyn/issues/52383")]
public async Task TestImportSystem()
{
await VerifyCS.VerifyRefactoringAsync(
"""
class C
{
public C([||]string s)
{
}
}
""",
"""
using System;
class C
{
public C(string s)
{
if (s is null)
{
throw new ArgumentNullException(nameof(s));
}
}
}
""");
}
[Fact, WorkItem("https://github.com/dotnet/roslyn/issues/52385")]
public async Task SingleLineStatement_NullCheck_BracesNone_SameLineFalse()
{
await new VerifyCS.Test
{
TestCode = """
using System;
class C
{
public C($$object o)
{
}
}
""",
FixedCode = """
using System;
class C
{
public C(object o)
{
if (o is null)
throw new ArgumentNullException(nameof(o));
}
}
""",
Options =
{
{ CSharpCodeStyleOptions.PreferThrowExpression, false },
{ CSharpCodeStyleOptions.PreferBraces, PreferBracesPreference.None },
{ CSharpCodeStyleOptions.AllowEmbeddedStatementsOnSameLine, false },
}
}.RunAsync();
}
[Fact, WorkItem("https://github.com/dotnet/roslyn/issues/52385")]
public async Task SingleLineStatement_NullCheck_BracesWhenMultiline_SameLineFalse()
{
await new VerifyCS.Test
{
TestCode = """
using System;
class C
{
public C($$object o)
{
}
}
""",
FixedCode = """
using System;
class C
{
public C(object o)
{
if (o is null)
throw new ArgumentNullException(nameof(o));
}
}
""",
Options =
{
{ CSharpCodeStyleOptions.PreferThrowExpression, false },
{ CSharpCodeStyleOptions.PreferBraces, PreferBracesPreference.WhenMultiline },
{ CSharpCodeStyleOptions.AllowEmbeddedStatementsOnSameLine, false },
}
}.RunAsync();
}
[Fact, WorkItem("https://github.com/dotnet/roslyn/issues/52385")]
public async Task SingleLineStatement_NullCheck_BracesAlways_SameLineFalse()
{
await new VerifyCS.Test
{
TestCode = """
using System;
class C
{
public C($$object o)
{
}
}
""",
FixedCode = """
using System;
class C
{
public C(object o)
{
if (o is null)
{
throw new ArgumentNullException(nameof(o));
}
}
}
""",
Options =
{
{ CSharpCodeStyleOptions.PreferThrowExpression, false },
{ CSharpCodeStyleOptions.PreferBraces, PreferBracesPreference.Always },
{ CSharpCodeStyleOptions.AllowEmbeddedStatementsOnSameLine, false },
}
}.RunAsync();
}
[Fact, WorkItem("https://github.com/dotnet/roslyn/issues/52385")]
public async Task SingleLineStatement_NullCheck_BracesNone_SameLineTrue()
{
await new VerifyCS.Test
{
TestCode = """
using System;
class C
{
public C($$object o)
{
}
}
""",
FixedCode = """
using System;
class C
{
public C(object o)
{
if (o is null) throw new ArgumentNullException(nameof(o));
}
}
""",
Options =
{
{ CSharpCodeStyleOptions.PreferThrowExpression, false },
{ CSharpCodeStyleOptions.PreferBraces, PreferBracesPreference.None },
{ CSharpCodeStyleOptions.AllowEmbeddedStatementsOnSameLine, true },
}
}.RunAsync();
}
[Fact, WorkItem("https://github.com/dotnet/roslyn/issues/52385")]
public async Task SingleLineStatement_NullCheck_BracesWhenMultiline_SameLineTrue()
{
await new VerifyCS.Test
{
TestCode = """
using System;
class C
{
public C($$object o)
{
}
}
""",
FixedCode = """
using System;
class C
{
public C(object o)
{
if (o is null) throw new ArgumentNullException(nameof(o));
}
}
""",
Options =
{
{ CSharpCodeStyleOptions.PreferThrowExpression, false },
{ CSharpCodeStyleOptions.PreferBraces, PreferBracesPreference.WhenMultiline },
{ CSharpCodeStyleOptions.AllowEmbeddedStatementsOnSameLine, true },
}
}.RunAsync();
}
[Fact, WorkItem("https://github.com/dotnet/roslyn/issues/52385")]
public async Task SingleLineStatement_NullCheck_BracesAlways_SameLineTrue()
{
await new VerifyCS.Test
{
TestCode = """
using System;
class C
{
public C($$object o)
{
}
}
""",
FixedCode = """
using System;
class C
{
public C(object o)
{
if (o is null)
{
throw new ArgumentNullException(nameof(o));
}
}
}
""",
Options =
{
{ CSharpCodeStyleOptions.PreferThrowExpression, false },
{ CSharpCodeStyleOptions.PreferBraces, PreferBracesPreference.Always },
{ CSharpCodeStyleOptions.AllowEmbeddedStatementsOnSameLine, true },
}
}.RunAsync();
}
[Fact, WorkItem("https://github.com/dotnet/roslyn/issues/52385")]
public async Task SingleLineStatement_StringIsNullOrEmpty_BracesNone_SameLineFalse()
{
await new VerifyCS.Test
{
TestCode = """
using System;
class C
{
public C($$string s)
{
}
}
""",
FixedCode = $@"using System;
class C
{{
public C(string s)
{{
if (string.IsNullOrEmpty(s))
throw new ArgumentException($""{string.Format(FeaturesResources._0_cannot_be_null_or_empty, "{nameof(s)}").Replace("""
"
""", """
\"
""")}"", nameof(s));
}}
}}",
Options =
{
{ CSharpCodeStyleOptions.PreferThrowExpression, false },
{ CSharpCodeStyleOptions.PreferBraces, PreferBracesPreference.None },
{ CSharpCodeStyleOptions.AllowEmbeddedStatementsOnSameLine, false },
},
CodeActionIndex = 1,
CodeActionEquivalenceKey = nameof(FeaturesResources.Add_string_IsNullOrEmpty_check)
}.RunAsync();
}
[Fact, WorkItem("https://github.com/dotnet/roslyn/issues/52385")]
public async Task SingleLineStatement_StringIsNullOrEmpty_BracesWhenMultiline_SameLineFalse()
{
await new VerifyCS.Test
{
TestCode = """
using System;
class C
{
public C($$string s)
{
}
}
""",
FixedCode = @$"using System;
class C
{{
public C(string s)
{{
if (string.IsNullOrEmpty(s))
throw new ArgumentException($""{string.Format(FeaturesResources._0_cannot_be_null_or_empty, "{nameof(s)}").Replace("""
"
""", """
\"
""")}"", nameof(s));
}}
}}",
Options =
{
{ CSharpCodeStyleOptions.PreferThrowExpression, false },
{ CSharpCodeStyleOptions.PreferBraces, PreferBracesPreference.WhenMultiline},
{ CSharpCodeStyleOptions.AllowEmbeddedStatementsOnSameLine, false },
},
CodeActionIndex = 1,
CodeActionEquivalenceKey = nameof(FeaturesResources.Add_string_IsNullOrEmpty_check)
}.RunAsync();
}
[Fact, WorkItem("https://github.com/dotnet/roslyn/issues/52385")]
public async Task SingleLineStatement_StringIsNullOrEmpty_BracesAlways_SameLineFalse()
{
await new VerifyCS.Test
{
TestCode = """
using System;
class C
{
public C($$string s)
{
}
}
""",
FixedCode = @$"using System;
class C
{{
public C(string s)
{{
if (string.IsNullOrEmpty(s))
{{
throw new ArgumentException($""{string.Format(FeaturesResources._0_cannot_be_null_or_empty, "{nameof(s)}").Replace("""
"
""", """
\"
""")}"", nameof(s));
}}
}}
}}",
Options =
{
{ CSharpCodeStyleOptions.PreferThrowExpression, false },
{ CSharpCodeStyleOptions.PreferBraces, PreferBracesPreference.Always },
{ CSharpCodeStyleOptions.AllowEmbeddedStatementsOnSameLine, false },
},
CodeActionIndex = 1,
CodeActionEquivalenceKey = nameof(FeaturesResources.Add_string_IsNullOrEmpty_check)
}.RunAsync();
}
[Fact, WorkItem("https://github.com/dotnet/roslyn/issues/52385")]
public async Task SingleLineStatement_StringIsNullOrEmpty_BracesNone_SameLineTrue()
{
await new VerifyCS.Test
{
TestCode = """
using System;
class C
{
public C($$string s)
{
}
}
""",
FixedCode = @$"using System;
class C
{{
public C(string s)
{{
if (string.IsNullOrEmpty(s)) throw new ArgumentException($""{string.Format(FeaturesResources._0_cannot_be_null_or_empty, "{nameof(s)}").Replace("""
"
""", """
\"
""")}"", nameof(s));
}}
}}",
Options =
{
{ CSharpCodeStyleOptions.PreferThrowExpression, false },
{ CSharpCodeStyleOptions.PreferBraces, PreferBracesPreference.None },
{ CSharpCodeStyleOptions.AllowEmbeddedStatementsOnSameLine, true },
},
CodeActionIndex = 1,
CodeActionEquivalenceKey = nameof(FeaturesResources.Add_string_IsNullOrEmpty_check)
}.RunAsync();
}
[Fact, WorkItem("https://github.com/dotnet/roslyn/issues/52385")]
public async Task SingleLineStatement_StringIsNullOrEmpty_BracesWhenMultiline_SameLineTrue()
{
await new VerifyCS.Test
{
TestCode = """
using System;
class C
{
public C($$string s)
{
}
}
""",
FixedCode = @$"using System;
class C
{{
public C(string s)
{{
if (string.IsNullOrEmpty(s)) throw new ArgumentException($""{string.Format(FeaturesResources._0_cannot_be_null_or_empty, "{nameof(s)}").Replace("""
"
""", """
\"
""")}"", nameof(s));
}}
}}",
Options =
{
{ CSharpCodeStyleOptions.PreferThrowExpression, false },
{ CSharpCodeStyleOptions.PreferBraces, PreferBracesPreference.WhenMultiline },
{ CSharpCodeStyleOptions.AllowEmbeddedStatementsOnSameLine, true },
},
CodeActionIndex = 1,
CodeActionEquivalenceKey = nameof(FeaturesResources.Add_string_IsNullOrEmpty_check)
}.RunAsync();
}
[Fact, WorkItem("https://github.com/dotnet/roslyn/issues/52385")]
public async Task SingleLineStatement_StringIsNullOrEmpty_BracesAlways_SameLineTrue()
{
await new VerifyCS.Test
{
TestCode = """
using System;
class C
{
public C($$string s)
{
}
}
""",
FixedCode = @$"using System;
class C
{{
public C(string s)
{{
if (string.IsNullOrEmpty(s))
{{
throw new ArgumentException($""{string.Format(FeaturesResources._0_cannot_be_null_or_empty, "{nameof(s)}").Replace("""
"
""", """
\"
""")}"", nameof(s));
}}
}}
}}",
Options =
{
{ CSharpCodeStyleOptions.PreferThrowExpression, false },
{ CSharpCodeStyleOptions.PreferBraces, PreferBracesPreference.Always },
{ CSharpCodeStyleOptions.AllowEmbeddedStatementsOnSameLine, true },
},
CodeActionIndex = 1,
CodeActionEquivalenceKey = nameof(FeaturesResources.Add_string_IsNullOrEmpty_check)
}.RunAsync();
}
[Fact, WorkItem("https://github.com/dotnet/roslyn/issues/52385")]
public async Task SingleLineStatement_NullCheck_AllParameters()
{
await new VerifyCS.Test
{
TestCode = """
using System;
class C
{
public C([||]object a, object b, object c)
{
}
}
""",
FixedCode = """
using System;
class C
{
public C(object a, object b, object c)
{
if (a is null) throw new ArgumentNullException(nameof(a));
if (b is null) throw new ArgumentNullException(nameof(b));
if (c is null) throw new ArgumentNullException(nameof(c));
}
}
""",
Options =
{
{ CSharpCodeStyleOptions.PreferThrowExpression, false },
{ CSharpCodeStyleOptions.PreferBraces, PreferBracesPreference.None },
{ CSharpCodeStyleOptions.AllowEmbeddedStatementsOnSameLine, true },
},
CodeActionIndex = 1,
CodeActionEquivalenceKey = nameof(FeaturesResources.Add_null_checks_for_all_parameters)
}.RunAsync();
}
[Fact, WorkItem("https://github.com/dotnet/roslyn/issues/58811")]
public async Task TestMissingParameter1()
{
var source = """
using System;
class C
{
public C(string s,[||]{|CS1031:{|CS1001:)|}|}
{
}
}
""";
await VerifyCS.VerifyRefactoringAsync(source, source);
}
[Fact, WorkItem("https://github.com/dotnet/roslyn/issues/58811")]
public async Task TestMissingParameter2()
{
var source = """
using System;
class C
{
public C(string s,[||] {|CS1031:{|CS1001:)|}|}
{
}
}
""";
await VerifyCS.VerifyRefactoringAsync(source, source);
}
[Fact, WorkItem("https://github.com/dotnet/roslyn/issues/58811")]
public async Task TestMissingParameter3()
{
var source = """
using System;
class C
{
public C(string s, [||]{|CS1031:{|CS1001:)|}|}
{
}
}
""";
await VerifyCS.VerifyRefactoringAsync(source, source);
}
[Fact, WorkItem("https://github.com/dotnet/roslyn/issues/58811")]
public async Task TestMissingParameter4()
{
var source = """
using System;
class C
{
public C(string s, [||] {|CS1031:{|CS1001:)|}|}
{
}
}
""";
await VerifyCS.VerifyRefactoringAsync(source, source);
}
[Theory]
[WorkItem("https://github.com/dotnet/roslyn/issues/58779")]
[InlineData(LanguageVersion.CSharp10)]
[InlineData(LanguageVersion.CSharp11)]
public async Task TestNotInRecord(LanguageVersion version)
{
var code = """
record C([||]string s) { public string s; }
""";
await new VerifyCS.Test
{
LanguageVersion = version,
TestCode = code,
}.RunAsync();
}
[Fact]
public async Task TestNotInClass()
{
var code = """
class C([||]string s) { public string s; }
""";
await new VerifyCS.Test
{
LanguageVersion = LanguageVersion.CSharp12,
TestCode = code,
}.RunAsync();
}
[Fact]
public async Task TestNotInStruct()
{
var code = """
struct C([||]string s) { public string s; }
""";
await new VerifyCS.Test
{
LanguageVersion = LanguageVersion.CSharp12,
TestCode = code,
}.RunAsync();
}
[Fact, WorkItem("https://github.com/dotnet/roslyn/issues/38093")]
public async Task TestReadBeforeAssignment()
{
await VerifyCS.VerifyRefactoringAsync("""
using System;
using System.IO;
class Program
{
public Program([||]Stream output)
{
if (!output.CanWrite) throw new ArgumentException();
OutStream = output;
}
public Stream OutStream { get; }
}
""", """
using System;
using System.IO;
class Program
{
public Program([||]Stream output)
{
if (output is null)
{
throw new ArgumentNullException(nameof(output));
}
if (!output.CanWrite) throw new ArgumentException();
OutStream = output;
}
public Stream OutStream { get; }
}
""");
}
[Fact, WorkItem("https://github.com/dotnet/roslyn/issues/41140")]
public async Task TestAfterComma1()
{
await VerifyCS.VerifyRefactoringAsync("""
using System;
class C
{
// should generate for 'b'
void M(string a,$$ string b, string c)
{
}
}
""", """
using System;
class C
{
// should generate for 'b'
void M(string a, string b, string c)
{
if (b is null)
{
throw new ArgumentNullException(nameof(b));
}
}
}
""");
}
[Fact, WorkItem("https://github.com/dotnet/roslyn/issues/41140")]
public async Task TestAfterComma2()
{
await VerifyCS.VerifyRefactoringAsync("""
using System;
class C
{
// should generate for 'a'
void M(string a,$$
string b, string c)
{
}
}
""", """
using System;
class C
{
// should generate for 'a'
void M(string a,
string b, string c)
{
if (a is null)
{
throw new ArgumentNullException(nameof(a));
}
}
}
""");
}
}
|