1 files changed, 16 insertions, 0 deletions
diff --git a/BackEnd/Timeline.Tests/Helpers/AsyncFunctionAssertionsExtensions.cs b/BackEnd/Timeline.Tests/Helpers/AsyncFunctionAssertionsExtensions.cs
new file mode 100644
index 00000000..b78309c0
--- /dev/null
+++ b/BackEnd/Timeline.Tests/Helpers/AsyncFunctionAssertionsExtensions.cs
@@ -0,0 +1,16 @@
+using FluentAssertions;
+using FluentAssertions.Primitives;
+using FluentAssertions.Specialized;
+using System;
+using System.Threading.Tasks;
+
+namespace Timeline.Tests.Helpers
+{
+    public static class AsyncFunctionAssertionsExtensions
+    {
+        public static async Task<AndConstraint<ObjectAssertions>> ThrowAsync(this AsyncFunctionAssertions assertions, Type exceptionType, string because = "", params object[] becauseArgs)
+        {
+            return (await assertions.ThrowAsync<Exception>(because, becauseArgs)).Which.Should().BeAssignableTo(exceptionType);
+        }
+    }
+}