public function test_where_liked_by()
 {
     Stub::create(['name' => 'A'])->like('like', 1);
     Stub::create(['name' => 'B'])->like('like', 1);
     Stub::create(['name' => 'C'])->like('like', 1);
     $stubs = Stub::whereLikedBy(1)->get();
     $shouldBeEmpty = Stub::whereLikedBy(2)->get();
     $this->assertEquals(3, $stubs->count());
     $this->assertEmpty($shouldBeEmpty);
 }