* Test for main WooCommerce class
* Check all class instances created from main class.
* Test all constants
* Test for deprecated hook handler classes as well
* Test template path constant
* Check static class instances
* get_cart_item_quantities test
* get_cart_item_quantities & get_cart_contents_weight tests
* check_cart_items test
* Check_cart_item_stock test
* Cart get_cross_sells test
* Cart get_tax_totals test
* WC_Customer_Download_Data_Store tests