IdentityShroud/IdentityShroud.TestUtils/Asserts/ResultAssert.cs

using FluentResults;

namespace IdentityShroud.Core.Tests;

public static class ResultAssert
{
    public static void Success(Result result)
    {
        if (!result.IsSuccess)
        {
            var errors = string.Join("\n", result.Errors.Select(e => "\t" + e.Message));
            Assert.True(result.IsSuccess, $"ResultAssert.Success: failed, got errors:\n{errors}");
        }
    }

    public static T Success<T>(Result<T> result)
    {
        Success(result.ToResult());
        return result.Value;
    }

    public static void Failed(Result result, Predicate<IError>? filter = null)
    {
        if (!result.IsFailed)
        {
            Assert.Fail("ResultAssert.Failed: failed, unexpected success result");
        }

        if (filter is not null)
            Assert.Contains(result.Errors, filter);
    }

    public static void Failed<T>(Result<T> result, Predicate<IError>? filter = null)
    {
        Failed(result.ToResult(), filter);
    }

    public static void FailedWith<TError>(Result result) where TError : IError
    {
        if (!result.IsFailed)
        {
            Assert.Fail("ResultAssert.Failed: failed, unexpected success result");
        }

        if (!result.Errors.Any(e => e is TError))
        {
            string typeName = typeof(TError).Name;
            Assert.Fail($"ResultAssert.Failed: failed, no error of the type {typeName} found");
        }
    }
    
    public static void FailedWith<T, TError>(Result<T> result) where TError : IError
    {
        if (!result.IsFailed)
        {
            Assert.Fail("ResultAssert.Failed: failed, unexpected success result");
        }
    
        if (!result.Errors.Any(e => e is TError))
        {
            string typeName = typeof(TError).Name;
            Assert.Fail($"ResultAssert.Failed: failed, no error of the type {typeName} found");
        }
    }
}