From 8769eca6571ccb63a28965e7589c10004a0458d5 Mon Sep 17 00:00:00 2001
From: David Koblas <david@koblas.com>
Date: Thu, 4 Sep 2025 07:26:56 -0400
Subject: [PATCH] fix: mod11 bug with dk/cvr

---
 src/dk/cvr.spec.ts | 6 ++++++
 src/dk/cvr.ts      | 2 +-
 2 files changed, 7 insertions(+), 1 deletion(-)

diff --git a/src/dk/cvr.spec.ts b/src/dk/cvr.spec.ts
index 129603fe..541bcd62 100644
--- a/src/dk/cvr.spec.ts
+++ b/src/dk/cvr.spec.ts
@@ -14,6 +14,12 @@ describe('dk/cvr', () => {
     expect(result.isValid && result.compact).toEqual('13585628');
   });
 
+  test.each(['DK13585628', '13585628', 'DK19319970'])('validate:%s', value => {
+    const result = validate(value);
+
+    expect(result.isValid).toEqual(true);
+  });
+
   it('validate:1234567', () => {
     const result = validate('1234567');
 
diff --git a/src/dk/cvr.ts b/src/dk/cvr.ts
index 93e72d60..b8e69ca2 100644
--- a/src/dk/cvr.ts
+++ b/src/dk/cvr.ts
@@ -64,7 +64,7 @@ const impl: Validator = {
       modulus: 11,
       weights: [2, 7, 6, 5, 4, 3, 2, 1],
     });
-    if (String((11 - sum) % 10) !== check) {
+    if (String((11 - (sum % 11)) % 11) !== check) {
       return { isValid: false, error: new exceptions.InvalidChecksum() };
     }