// 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.Text.Json;
using Microsoft.CodeAnalysis.ErrorReporting;
using Roslyn.Test.Utilities;
using Xunit;
 
namespace Microsoft.CodeAnalysis.UnitTests;
 
public sealed class ExceptionHelpersTests : TestBase
{
    /// <summary>
    /// Test that throwing OperationCanceledException does NOT trigger FailFast
    /// </summary>
    [Fact]
    public void TestExecuteWithErrorReportingThrowOperationCanceledException()
    {
        var finallyExecuted = false;
 
        void a()
        {
            try
            {
                throw new OperationCanceledException();
            }
            finally
            {
                finallyExecuted = true;
            }
        }
 
        try
        {
            try
            {
                a();
            }
            catch (Exception e) when (FatalError.ReportAndPropagateUnlessCanceled(e))
            {
                throw ExceptionUtilities.Unreachable();
            }
 
            Assert.True(false, "Should not get here because an exception should be thrown before this point.");
        }
        catch (OperationCanceledException)
        {
            Assert.True(finallyExecuted);
            return;
        }
 
        Assert.True(false, "Should have returned in the catch block before this point.");
    }
 
    [Fact]
    public void ErrorReporting_SerializesException()
    {
        FatalError.SetHandlers(delegate { }, delegate { });
 
        var e = new Exception("Hello");
        FatalError.ReportNonFatalError(e);
 
        Assert.NotEmpty(e.Data);
        Assert.NotNull(JsonSerializer.Serialize(e));
        Assert.NotNull(Newtonsoft.Json.JsonConvert.SerializeObject(e));
    }
}