RCS1061MergeIfWithNestedIfTests.cs

// Copyright (c) Josef Pihrt and Contributors. Licensed under the Apache License, Version 2.0. See License.txt in the project root for license information.

using System.Threading.Tasks;
using Microsoft.CodeAnalysis;
using Roslynator.CSharp.CodeFixes;
using Roslynator.Testing.CSharp;
using Xunit;

namespace Roslynator.CSharp.Analysis.Tests;

public class RCS061MergeIfWithNestedIfTests : AbstractCSharpDiagnosticVerifier<MergeIfWithNestedIfAnalyzer, IfStatementCodeFixProvider>
{
    public override DiagnosticDescriptor Descriptor => DiagnosticRules.MergeIfWithNestedIf;

    [Fact, Trait(Traits.Analyzer, DiagnosticIdentifiers.MergeIfWithNestedIf)]
    public async Task Test_MergeIfStatement()
    {
        await VerifyDiagnosticAndFixAsync(@"
using System.Collections.Generic;
class C
{
    public static void M(Dictionary<string, string> settings, string name)
    {
        [|if (name == ""name1"")
        {
            if (settings.TryGetValue(""name1"", out var v1))
            {
            }
        }|]
    }
}",
@"
using System.Collections.Generic;
class C
{
    public static void M(Dictionary<string, string> settings, string name)
    {
        if (name == ""name1"" && settings.TryGetValue(""name1"", out var v1))
        {
        }
    }
}");
    }

    [Fact, Trait(Traits.Analyzer, DiagnosticIdentifiers.MergeIfWithNestedIf)]
    public async Task TestNoDiagnostic_WhenLocalVariablesOverlap()
    {
        await VerifyNoDiagnosticAsync(@"
using System.Collections.Generic;
class C
{
    public static void M(Dictionary<string, string> settings, string name)
    {
        if (name == ""name1"")
        {
            if (settings.TryGetValue(""name1"", out var v1))
            {
            }
        }
        
        if (name == ""name2"")
        {
            if (settings.TryGetValue(""name2"", out var v1))
            {
            }
        }
    }
}");
    }
}