Vim Script to run PHPUnit tests from the editor and display the results in the message bar

vim-phpunit.vim

let g:test_directory = "tests"
function DirectoryExists(...)
    if empty(a:1)
        return 0
    endif
    
    let a:directory = system("if [ ! -d " . a:1 . " ]; then echo 0; else echo 1; fi")
    return a:directory
endfunction

function PHPUnit()
    let a:exists = DirectoryExists(g:test_directory)
    if a:exists == 0
        echom "You are not in the proper directory to run your tests"
        return 0
    endif
    
    let a:tests = system("phpunit | grep \\(.*tests,.*\\)")
    if a:tests == ""
        echom "No tests to run are you in the right directory"
    else
        echom "PHPUnit Results: " . a:tests
        return 1
    endif
endfunction