Before:
Save g:ale_qml_qmlfmt_executable
After:
Restore
Execute(The qmlfmt fixer should use the options you set):
let g:ale_qml_qmlfmt_executable = 'foo-exe'
AssertEqual
\ {'command': ale#Escape('foo-exe')},
\ ale#fixers#qmlfmt#Fix(bufnr(''))