From 6b3a2377a7b657ea8cb8647e55dca04c86290e4d Mon Sep 17 00:00:00 2001
From: Aneurin Barker Snook <a@aneur.in>
Date: Sun, 19 Nov 2023 20:27:33 +0000
Subject: [PATCH] add validation error type, fix tests, add number tests

---
 registry_test.go | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/registry_test.go b/registry_test.go
index 8f5c780..be9869f 100644
--- a/registry_test.go
+++ b/registry_test.go
@@ -1,6 +1,7 @@
 package registry
 
 import (
+	"errors"
 	"testing"
 )
 
@@ -24,7 +25,7 @@ func TestRegistry(t *testing.T) {
 		t.Logf("(%d) Testing set %s=%q (lock: %t)", i, tc.Key, tc.Value, tc.Lock)
 
 		err := r.Set(tc.Key, tc.Value)
-		if err != tc.Err {
+		if !errors.Is(err, tc.Err) {
 			t.Errorf("Expected error %v, got %v", tc.Err, err)
 		}