test: add test for creation stats

Author: Frederik Ring

tests/Jobs/PlatformStatsSummaryJobTest.php

@@ -36,6 +36,7 @@ protected function tearDown(): void {
         foreach ($this->wikis as $wiki) {
             $wiki['wiki']->wikiDb()->forceDelete();
             $wiki['wiki']->forceDelete();
+            $wiki['user']->forceDelete();
         }
         parent::tearDown();
     }
@@ -164,6 +165,27 @@ public function testGroupings()
             $groups, 
         );
     }
+    function testCreationStats() {
+        $mockJob = $this->createMock(Job::class);
+        $mockJob->expects($this->never())->method('fail');
+
+        $job = new PlatformStatsSummaryJob();
+        $job->setJob($mockJob);
 
+        $testWikis = [];
+        $testUsers = [];
 
+        $stats =  $job->getCreationStats();
+
+        $this->assertEquals(
+            [
+                'wikis_created_PT24H' => 0,
+                'wikis_created_P30D' => 0,
+                'users_created_PT24H' => 0,
+                'users_created_P30D' => 0,
+            ],
+             $stats,
+         );
+
+    }
 }