testing?

nowadays, parents happen to be so 'commercialize', that they asked for testing period in tadika. And principal allowed some of them for testing, even we know that these would lead to class disturbance whenever there's new comer in the midst of school semesters.
frankly, i disagree of what she allowed.
If the child are ready for school, or already reach the schooling years, parents should sent them to school when the new school semester starts, and register their children before school reopen, regardless which school the parents choose, and not sending them after school reopen or at the midst of sem. The 1st few days, or maybe up to months, they need to get use to the school environment; they might cry for mummy, they might be scared to socialize, they might be afraid of the strangers around them, including teachers. They just need time to adjust and suit in new environment. No point testing a few days. they get nothing, they learn nothing. If parents keep searching and putting them for new environments, they need to adjust all over again and again to each of the new surroundings.
What the children get at the end? What parents get at the end?