Fixing oversimplification problem

Author: moufmouf

src/SQLParser/Node/Expression.php

@@ -33,6 +33,7 @@
 namespace SQLParser\Node;
 
 use Doctrine\DBAL\Connection;
+use function is_iterable;
 use Mouf\MoufInstanceDescriptor;
 use Mouf\MoufManager;
 use SQLParser\Node\Traverser\NodeTraverser;
@@ -263,10 +264,14 @@ public function walk(VisitorInterface $visitor)
      */
     public function canBeBypassed(array $parameters): bool
     {
-        foreach ($this->subTree as $node) {
-            if (!$node instanceof BypassableInterface || !$node->canBeBypassed($parameters)) {
-                return false;
+        if (is_iterable($this->subTree)) {
+            foreach ($this->subTree as $node) {
+                if (!$node instanceof BypassableInterface || !$node->canBeBypassed($parameters)) {
+                    return false;
+                }
             }
+        } elseif (!$this->subTree instanceof BypassableInterface || !$this->subTree->canBeBypassed($parameters)) {
+            return false;
         }
         return true;
     }

tests/Mouf/Database/MagicQueryTest.php

@@ -179,7 +179,7 @@ public function testStandardSelect()
         $this->assertEquals('SELECT a FROM users AS u CROSS JOIN users AS u2', self::simplifySql($magicQuery->build($sql)));
 
         $sql = 'SELECT a FROM users u WHERE status = (CASE WHEN u.id = 1 THEN u.status_1 ELSE u.status_2 END)';
-        $this->assertEquals('foo', self::simplifySql($magicQuery->build($sql)));
+        $this->assertEquals('SELECT a FROM users AS u WHERE status = (CASE WHEN u.id = 1 THEN u.status_1 ELSE u.status_2 END)', self::simplifySql($magicQuery->build($sql)));
     }
 
     /**