ale/test/fixers/test_rustfmt_fixer_callback...

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Before:
Save g:ale_rust_rustfmt_executable
Save g:ale_rust_rustfmt_options
" Use an invalid global executable, so we don't match it.
let g:ale_rust_rustfmt_executable = 'xxxinvalid'
let g:ale_rust_rustfmt_options = ''
call ale#test#SetDirectory('/testplugin/test/fixers')
After:
Restore
call ale#test#RestoreDirectory()
Execute(The rustfmt callback should return the correct default values):
call ale#test#SetFilename('../rust_files/testfile.rs')
AssertEqual
\ {
\ 'command': ale#Escape('xxxinvalid'),
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\ },
\ ale#fixers#rustfmt#Fix(bufnr(''))
Execute(The rustfmt callback should include custom rustfmt options):
let g:ale_rust_rustfmt_options = "--skip-children"
call ale#test#SetFilename('../rust_files/testfile.rs')
AssertEqual
\ {
\ 'command': ale#Escape('xxxinvalid')
\ . ' ' . g:ale_rust_rustfmt_options,
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\ },
\ ale#fixers#rustfmt#Fix(bufnr(''))