[12.x] Add test for untested methods in LazyCollection (#54996)

* test: Implement comprehensive test cases for before() method

This commit adds test coverage for the before() method including:
- Non-strict comparison
- Strict comparison
- Callback function usage

* test: Implement comprehensive test cases for shuffle() method

This commit adds test coverage for the shuffle() method including:

Author: mohammadrasoulasghari

tests/Support/SupportLazyCollectionTest.php

@@ -312,4 +312,47 @@ public function testAfter()
 
         $this->assertSame(['name' => 'Mohamed', 'age' => 35], $result);
     }
+
+    public function testBefore()
+    {
+        // Test finding item before value with non-strict comparison
+        $data = new LazyCollection([1, 2, '3', 4]);
+        $result = $data->before(2);
+        $this->assertSame(1, $result);
+
+        // Test finding item before value with strict comparison
+        $result = $data->before(4, true);
+        $this->assertSame('3', $result);
+
+        // Test finding item before the one that matches a callback condition
+        $users = new LazyCollection([
+            ['name' => 'Taylor', 'age' => 35],
+            ['name' => 'Jeffrey', 'age' => 45],
+            ['name' => 'Mohamed', 'age' => 35],
+        ]);
+        $result = $users->before(function ($user) {
+            return $user['name'] === 'Jeffrey';
+        });
+        $this->assertSame(['name' => 'Taylor', 'age' => 35], $result);
+    }
+
+    public function testShuffle()
+    {
+        $data = new LazyCollection([1, 2, 3, 4, 5]);
+        $shuffled = $data->shuffle();
+
+        $this->assertCount(5, $shuffled);
+        $this->assertEquals([1, 2, 3, 4, 5], $shuffled->sort()->values()->all());
+
+        // Test shuffling associative array maintains key-value pairs
+        $users = new LazyCollection([
+            'first' => ['name' => 'Taylor'],
+            'second' => ['name' => 'Jeffrey'],
+        ]);
+        $shuffled = $users->shuffle();
+
+        $this->assertCount(2, $shuffled);
+        $this->assertTrue($shuffled->contains('name', 'Taylor'));
+        $this->assertTrue($shuffled->contains('name', 'Jeffrey'));
+    }
 }