[9.x] Improve Test for Pluck method in Collection (#43361)

* [9.x] Improve Test for Pluck method in Collection

* [9.x] Improve Test for Pluck method in Collection

fix style

* [9.x] Improve Test for Pluck method in Collection

Author: moharami

tests/Support/SupportCollectionTest.php

@@ -2170,6 +2170,44 @@ public function testPluckWithArrayAccessValues($collection)
         $this->assertEquals(['foo', 'bar'], $data->pluck('email')->all());
     }
 
+    /**
+     * @dataProvider collectionClassProvider
+     */
+    public function testPluckWithDotNotation($collection)
+    {
+        $data = new $collection([
+            [
+                'name' => 'amir',
+                'skill' => [
+                    'backend' => ['php', 'python'],
+                ],
+            ],
+            [
+                'name' => 'taylor',
+                'skill' => [
+                    'backend' => ['php', 'asp', 'java'],
+                ],
+            ],
+        ]);
+
+        $this->assertEquals([['php', 'python'], ['php', 'asp', 'java']], $data->pluck('skill.backend')->all());
+    }
+
+    /**
+     * @dataProvider collectionClassProvider
+     */
+    public function testPluckDuplicateKeysExist($collection)
+    {
+        $data = new collection([
+            ['brand' => 'Tesla', 'color' => 'red'],
+            ['brand' => 'Pagani', 'color' => 'white'],
+            ['brand' => 'Tesla', 'color' => 'black'],
+            ['brand' => 'Pagani', 'color' => 'orange'],
+        ]);
+
+        $this->assertEquals(['Tesla' => 'black', 'Pagani' => 'orange'], $data->pluck('color', 'brand')->all());
+    }
+
     /**
      * @dataProvider collectionClassProvider
      */