countOf example

$groupRepository = $this->getContainer()->get('property_group.repository');
        $event = $groupRepository->update([
            [
                'id' => $this->ids->get('group1'),
                'sortingType' => PropertyGroupDefinition::SORTING_TYPE_POSITION,
            ],
        ], Context::createDefaultContext());

        $this->cacheInvalidatorMock->expects(static::once())
            ->method('invalidate')
            ->with(static::countOf(1));

        $this->cacheInvalidationSubscriber->invalidatePropertyFilters($event);
    }

    public function testItInvalidatesCacheIfPropertyGroupTranslationIsChanged(): void
    {
        $this->insertDefaultPropertyGroup();

        $groupRepository = $this->getContainer()->get('property_group.repository');
        $event = $groupRepository->update([
            [