[Plugin:add_action problem] load-{$page} action not work

In my plugin, I want to do some operation on both post-new.php page and post.php page,or another way of saying when I add a new post and edit a existed post.
So I use the

add_action('load-post.php','my_test_funtion');//I hope this can work ,but it doesn't
add_action('load-post-new.php','my_test_funtion');//I hope this can work ,but it doesn't
add_action('wp_insert_post','my_test_funtion');//This is the original code,but it only works on the post-new.php,and I can't find a similar action on the post.php page

in my plugin.

And then I try to use

add_action('admin_enqueue_scripts','my_test_funtion');//only for test
add_action('admin_print_styles','my_test_funtion');//only for test
add_action('admin_print_scripts','my_test_funtion');//only for test
add_action('admin_head','my_test_funtion');//only for test

but all above do not work on all admin page but the post-new.php, and I can’t see any effect but on the post-new.php. So weird!

I hope you guys can help me , it’s so confusing!