From e50ff968046f452c24f9dbb997c885fd039c5c23 Mon Sep 17 00:00:00 2001
From: Julien Nigay <julien.nigay@younited-credit.fr>
Date: Fri, 13 May 2022 17:25:30 +0200
Subject: [PATCH 1/2] Handle async validation

---
 .../ValidationTests.cs                                 | 10 ++++++----
 .../ValidationBehavior.cs                              |  9 +++++----
 2 files changed, 11 insertions(+), 8 deletions(-)

diff --git a/src/MediatR.Extensions.FluentValidation.AspNetCore.Tests/ValidationTests.cs b/src/MediatR.Extensions.FluentValidation.AspNetCore.Tests/ValidationTests.cs
index 0079a27..e82c708 100644
--- a/src/MediatR.Extensions.FluentValidation.AspNetCore.Tests/ValidationTests.cs
+++ b/src/MediatR.Extensions.FluentValidation.AspNetCore.Tests/ValidationTests.cs
@@ -48,14 +48,16 @@ public class CommandValidation : AbstractValidator<Command>
     {
         public CommandValidation()
         {
-            RuleFor(x => x.Discount).GreaterThanOrEqualTo(0);
+            RuleFor(x => x.Discount)
+                .GreaterThanOrEqualTo(0)
+                .MustAsync(async (_, __) => await Task.Delay(0).ContinueWith(x => true));
         }
     }
 
     public class Command : IRequest
-    {
+    {		
         public decimal Discount { get; set; }
-
+		
     }
 
     public class CommandHandler : IRequestHandler<Command>
@@ -65,4 +67,4 @@ public async Task<Unit> Handle(Command request, CancellationToken cancellationTo
             return await Unit.Task;
         }
     }
-}
+}
\ No newline at end of file
diff --git a/src/MediatR.Extensions.FluentValidation.AspNetCore/ValidationBehavior.cs b/src/MediatR.Extensions.FluentValidation.AspNetCore/ValidationBehavior.cs
index 9575ed1..6eeb1ce 100644
--- a/src/MediatR.Extensions.FluentValidation.AspNetCore/ValidationBehavior.cs
+++ b/src/MediatR.Extensions.FluentValidation.AspNetCore/ValidationBehavior.cs
@@ -16,13 +16,14 @@ public ValidationBehavior(IEnumerable<IValidator<TRequest>> validators)
             _validators = validators;
         }
 
-        public Task<TResponse> Handle(TRequest request
+        public async Task<TResponse> Handle(TRequest request
             , CancellationToken cancellationToken
             , RequestHandlerDelegate<TResponse> next
         )
         {
-            var failures = _validators
-                .Select(v => v.Validate(request))
+            var failures =
+                (await Task.WhenAll(_validators.Select(async v => await v.ValidateAsync(request, cancellationToken))))
+                .Where(result => result != null)
                 .SelectMany(result => result.Errors)
                 .Where(f => f != null)
                 .ToList();
@@ -32,7 +33,7 @@ public Task<TResponse> Handle(TRequest request
                 throw new ValidationException(failures);
             }
 
-            return next();
+            return await next();
         }
     }
 }
\ No newline at end of file

From 783f48acfd56ab0604e58e2052c7a720aa38d658 Mon Sep 17 00:00:00 2001
From: Julien Nigay <julien.nigay@younited-credit.fr>
Date: Fri, 13 May 2022 17:29:10 +0200
Subject: [PATCH 2/2] clean diff

---
 .../ValidationTests.cs                                        | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/src/MediatR.Extensions.FluentValidation.AspNetCore.Tests/ValidationTests.cs b/src/MediatR.Extensions.FluentValidation.AspNetCore.Tests/ValidationTests.cs
index e82c708..2a7e194 100644
--- a/src/MediatR.Extensions.FluentValidation.AspNetCore.Tests/ValidationTests.cs
+++ b/src/MediatR.Extensions.FluentValidation.AspNetCore.Tests/ValidationTests.cs
@@ -55,9 +55,9 @@ public CommandValidation()
     }
 
     public class Command : IRequest
-    {		
+    {
         public decimal Discount { get; set; }
-		
+
     }
 
     public class CommandHandler : IRequestHandler<Command>