From 0eefe1ce6ad17d607a0e8fdc5ca8efa5029347c6 Mon Sep 17 00:00:00 2001
From: Stevan Freeborn <65925598+StevanFreeborn@users.noreply.github.com>
Date: Thu, 2 Apr 2026 20:49:25 -0500
Subject: [PATCH] test: update WithCustomCryptoProvider null test to expect
 ArgumentNullException

---
 .../Unit/Configuration/SecureConfigBuilderTests.cs         | 7 ++++---
 1 file changed, 4 insertions(+), 3 deletions(-)

diff --git a/tests/StevanFreeborn.Extensions.Configuration.Secure.Tests/Unit/Configuration/SecureConfigBuilderTests.cs b/tests/StevanFreeborn.Extensions.Configuration.Secure.Tests/Unit/Configuration/SecureConfigBuilderTests.cs
index 2ebe46b..f2219df 100644
--- a/tests/StevanFreeborn.Extensions.Configuration.Secure.Tests/Unit/Configuration/SecureConfigBuilderTests.cs
+++ b/tests/StevanFreeborn.Extensions.Configuration.Secure.Tests/Unit/Configuration/SecureConfigBuilderTests.cs
@@ -265,11 +265,12 @@ public class SecureConfigBuilderTests
   }
 
   [Fact]
-  public void WithCustomCryptoProvider_WithNullFactory_ItShouldSetNull()
+  public void WithCustomCryptoProvider_WithNullFactory_ItShouldThrowArgumentNullException()
   {
-    _sut.WithCustomCryptoProvider(null!);
+    var act = () => _sut.WithCustomCryptoProvider(null!);
 
-    _sut.CryptoProviderFactory.Should().BeNull();
+    act.Should().Throw<ArgumentNullException>()
+      .WithParameterName("cryptoProviderFactory");
   }
 
   [Fact]