Before: Save g:ale_c_astyle_executable Save g:ale_c_astyle_project_options Save g:ale_cpp_astyle_project_options " Use an invalid global executable, so we don't match it. let g:ale_c_astyle_executable = 'xxxinvalid' let g:ale_cpp_astyle_executable = 'invalidpp' let g:ale_c_astyle_project_options = '' let g:ale_cpp_astyle_project_options = '' call ale#test#SetDirectory('/testplugin/test/fixers') After: Restore call ale#test#RestoreDirectory() Execute(The astyle callback should return the correct default values): " Because this file doesn't exist, no astylrc config " exists near it. Therefore, project_options is empty. call ale#test#SetFilename('../c_files/testfile.c') let targetfile = bufname(bufnr('%')) AssertEqual \ { \ 'command': ale#Escape(g:ale_c_astyle_executable) \ . ' --stdin=' . ale#Escape(targetfile) \ }, \ ale#fixers#astyle#Fix(bufnr('')) Execute(The astyle callback should support cpp files): " Because this file doesn't exist, no astylrc config " exists near it. Therefore, project_options is empty. call ale#test#SetFilename('../cpp_files/dummy.cpp') set filetype=cpp " The test fails without this let targetfile = bufname(bufnr('%')) AssertEqual \ { \ 'command': ale#Escape(g:ale_cpp_astyle_executable) \ . ' --stdin=' . ale#Escape(targetfile) \ }, \ ale#fixers#astyle#Fix(bufnr('')) Execute(The astyle callback should support cpp files with option file set): call ale#test#SetFilename('../cpp_files/dummy.cpp') let g:ale_cpp_astyle_project_options = '.astylerc_cpp' let targetfile = bufname(bufnr('%')) set filetype=cpp " The test fails without this AssertEqual \ { \ 'command': ale#Escape('invalidpp') \ . ' --project=' . g:ale_cpp_astyle_project_options \ . ' --stdin=' . ale#Escape(targetfile) \ }, \ ale#fixers#astyle#Fix(bufnr('')) Execute(The astyle callback should return the correct default values with a specified option file): call ale#test#SetFilename('../c_files/testfile.c') let g:ale_c_astyle_project_options = '.astylerc_c' let targetfile = bufname(bufnr('%')) AssertEqual \ { \ 'command': ale#Escape('xxxinvalid') \ . ' --project=' . g:ale_c_astyle_project_options \ . ' --stdin=' . ale#Escape(targetfile) \ }, \ ale#fixers#astyle#Fix(bufnr('')) Execute(The astyle callback should find nearest default option file _astylrc): call ale#test#SetFilename('../test-files/c/makefile_project/subdir/file.c') let targetfile = bufname(bufnr('%')) AssertEqual \ { \ 'command': ale#Escape('xxxinvalid') \ . ' --project=_astylerc' \ . ' --stdin=' . ale#Escape(targetfile) \ }, \ ale#fixers#astyle#Fix(bufnr('')) Execute(The astyle callback should find .astylrc in the same directory as src): call ale#test#SetFilename('../test-files/cpp/dummy.cpp') set filetype=cpp " The test fails without this let targetfile = bufname(bufnr('%')) AssertEqual \ { \ 'command': ale#Escape('invalidpp') \ . ' --project=.astylerc' \ . ' --stdin=' . ale#Escape(targetfile) \ }, \ ale#fixers#astyle#Fix(bufnr(''))