fix contact list fetch endpoint's other default value

- AUT-3246

Co-authored-by: Bence Kadar <bence.kadar@emarsys.com>

src/Suite/Api/ContactList.php

@@ -129,7 +129,7 @@ public function getContactIdsInList(int $customerId, int $contactListId, int $to
         }
     }
 
-    public function getListChunkIterator(int $customerId, int $contactListId, int $chunkSize = 10000) : iterable
+    public function getListChunkIterator(int $customerId, int $contactListId, int $chunkSize = null) : iterable
     {
         $next = $this->endPoints->contactIdsInList($customerId, $contactListId, $chunkSize);
         try {

test/unit/Suite/Api/ContactListTest.php

@@ -341,6 +341,21 @@ public function getContactListChunkIterator_ListFitsInSingleChunk_ContactIdsRetu
         $this->assertEquals([[1, 2, 3]], iterator_to_array($iterator));
     }
 
+    /**
+     * @test
+     */
+    public function getContactListChunkIterator_ChunkSizeNotPassed_TopNotSentInRequest(): void
+    {
+        $chunkSize = 3;
+        $this->apiClient->expects($this->once())->method('get')
+            ->with("api_base_url/$this->customerId/contactlist/$this->contactListId/contactIds")
+            ->willReturn(
+                $this->apiSuccess(['value' => [1, 2, 3], 'next' => null])
+            );
+        $iterator = $this->listService->getListChunkIterator($this->customerId, $this->contactListId);
+        $this->assertEquals([[1, 2, 3]], iterator_to_array($iterator));
+    }
+
     /**
      * @test
      */