Problem: tests: no error check when setting global 'briopt'
Solution: also parse and check global 'briopt' value (Milly)
closes: vim/vim#15911b38700ac81
Co-authored-by: Milly <milly.ca@gmail.com>
Problem: tests: no error check when setting global 'cc'
Solution: also parse and check global 'cc' value (Milly)
closes: vim/vim#15914a441a3eaab
Co-authored-by: Milly <milly.ca@gmail.com>
Problem: tests: no error check when setting global 'isk'
Solution: also parse and check global 'isk' value (Milly)
closes: vim/vim#159155e7a6a4a10
Co-authored-by: Milly <milly.ca@gmail.com>
Problem: tests: no error check when setting global 'fdm' to empty value
Solution: Also check global 'fdm' value for being empty (Milly).
closes: vim/vim#15916142cad1f88
Co-authored-by: Milly <milly.ca@gmail.com>
Problem: tests: minor issues in gen_opt_test.vim
Solution: fix restore value for 'undolevels', fix comment, fix
wrong cpo value, add equality test for global-local options on
switchback (Milly).
closes: vim/vim#15913231480f975
Cherry-pick gen_opt_test.vim change from patch 9.1.0807.
Co-authored-by: Milly <milly.ca@gmail.com>
Problem: testing of options can be further improved
Solution: split the generated option test into test_options_all.vim,
add more test cases, save and restore values, fix use-after-free
closes: vim/vim#158946eca04e9f1
Co-authored-by: Milly <milly.ca@gmail.com>
Problem: tests: Test_set_values() is not comprehensive enough
Solution: Add a lot more test cases (Milly)
closes: vim/vim#15892cc15bbcbc4
Co-authored-by: Milly <milly.ca@gmail.com>
Problem: Insufficient test coverage for validation of option values.
Solution: Port Vim's gen_opt_test.vim and make it work with Nvim.
vim-patch:9.1.0760: tests: no error reported, if gen_opt_test.vim fails
vim-patch:9.1.0791: tests: errors in gen_opt_test.vim are not shown
