spectre.console/test/Spectre.Console.Analyzer.Tests/Unit/Fixes/UseInstanceOfStaticAnsiConsoleTests.cs

using System.Threading.Tasks;
using Microsoft.CodeAnalysis;
using Microsoft.CodeAnalysis.Testing;
using Xunit;

namespace Spectre.Console.Analyzer.Tests.Unit.Fixes
{
    public class UseInstanceOfStaticAnsiConsoleTests
    {
        private static readonly DiagnosticResult _expectedDiagnostic = new(
            Descriptors.S1010_FavorInstanceAnsiConsoleOverStatic.Id,
            DiagnosticSeverity.Info);

        [Fact]
        public async Task Static_call_replaced_with_field_call()
        {
            const string Source = @"
using Spectre.Console;

class TestClass 
{
    IAnsiConsole _ansiConsole = AnsiConsole.Console;    

    void TestMethod() 
    {
        _ansiConsole.Write(""this is fine"");
        AnsiConsole.Write(""Hello, World"");
    } 
}";

            const string FixedSource = @"
using Spectre.Console;

class TestClass 
{
    IAnsiConsole _ansiConsole = AnsiConsole.Console;    

    void TestMethod() 
    {
        _ansiConsole.Write(""this is fine"");
        _ansiConsole.Write(""Hello, World"");
    } 
}";

            await SpectreAnalyzerVerifier<FavorInstanceAnsiConsoleOverStaticAnalyzer>
                .VerifyCodeFixAsync(Source, _expectedDiagnostic.WithLocation(11, 9), FixedSource)
                .ConfigureAwait(false);
        }

        [Fact]
        public async Task Static_call_replaced_with_field_call_Should_Preserve_Trivia()
        {
            const string Source = @"
using Spectre.Console;

class TestClass 
{
    IAnsiConsole _ansiConsole = AnsiConsole.Console;    

    void TestMethod() 
    {
        var foo = 1;

        AnsiConsole.Write(""this is fine"");
        _ansiConsole.Write(""Hello, World"");
    } 
}";

            const string FixedSource = @"
using Spectre.Console;

class TestClass 
{
    IAnsiConsole _ansiConsole = AnsiConsole.Console;    

    void TestMethod() 
    {
        var foo = 1;

        _ansiConsole.Write(""this is fine"");
        _ansiConsole.Write(""Hello, World"");
    } 
}";

            await SpectreAnalyzerVerifier<FavorInstanceAnsiConsoleOverStaticAnalyzer>
                .VerifyCodeFixAsync(Source, _expectedDiagnostic.WithLocation(12, 9), FixedSource)
                .ConfigureAwait(false);
        }

        [Fact]
        public async Task Static_call_replaced_with_parameter_call()
        {
            const string Source = @"
using Spectre.Console;

class TestClass 
{
    void TestMethod(IAnsiConsole ansiConsole) 
    {
        AnsiConsole.Write(""Hello, World"");
    } 
}";

            const string FixedSource = @"
using Spectre.Console;

class TestClass 
{
    void TestMethod(IAnsiConsole ansiConsole) 
    {
        ansiConsole.Write(""Hello, World"");
    } 
}";

            await SpectreAnalyzerVerifier<FavorInstanceAnsiConsoleOverStaticAnalyzer>
                .VerifyCodeFixAsync(Source, _expectedDiagnostic.WithLocation(8, 9), FixedSource)
                .ConfigureAwait(false);
        }

        [Fact]
        public async Task Static_call_replaced_with_static_field_if_valid()
        {
            const string Source = @"
using Spectre.Console;

class TestClass 
{
    static IAnsiConsole staticConsole;
    IAnsiConsole instanceConsole;

    static void TestMethod() 
    {
        AnsiConsole.Write(""Hello, World"");
    } 
}";

            const string FixedSource = @"
using Spectre.Console;

class TestClass 
{
    static IAnsiConsole staticConsole;
    IAnsiConsole instanceConsole;

    static void TestMethod() 
    {
        staticConsole.Write(""Hello, World"");
    } 
}";

            await SpectreAnalyzerVerifier<FavorInstanceAnsiConsoleOverStaticAnalyzer>
                .VerifyCodeFixAsync(Source, _expectedDiagnostic.WithLocation(11, 9), FixedSource)
                .ConfigureAwait(false);
        }
    }
}