Fix checksum validation in case control number equals 10 (#4)

Horat1us · Dec 21, 2021 · c5cd66c · c5cd66c
1 parent 79821cc
commit c5cd66c
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Showing 2 changed files with 10 additions and 0 deletions.
diff --git a/src/Parser.php b/src/Parser.php
@@ -46,6 +46,9 @@ public function isValid(): bool
         }
 
         $control = (int)($controlSum - (11 * (int)($controlSum / 11)));
+        if ($control === 10) {
+            $control = 0;
+        }
 
         return $control == (int)$split[9];
     }

diff --git a/tests/ParserTest.php b/tests/ParserTest.php
@@ -52,6 +52,13 @@ public function testInvalidInn(): void
         new Inn\Parser("invalidInn");
     }
 
+    public function testValidCheckSum(): void
+    {
+        $parser = new Inn\Parser("3584004820");
+
+        $this->assertEquals(true, $parser->isValid());
+    }
+
     public function testMaximalValue(): void
     {
         $minValue = Inn\Parser::minimalValue();