v/cmd/tools/test_if_v_test_system_works.v

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module main
// This program verifies that `v test` propagates errors
// and that it exits with code 1, when at least 1 FAIL happen.
import os
import rand
const (
vexe = get_vexe_path()
vroot = os.dir(vexe)
tdir = new_tdir()
)
fn get_vexe_path() string {
env_vexe := os.getenv('VEXE')
if env_vexe != '' {
return env_vexe
}
me := os.executable()
eprintln('me: $me')
mut vexe_ := os.join_path(os.dir(os.dir(os.dir(me))), 'v')
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if os.user_os() == 'windows' {
vexe_ += '.exe'
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}
return vexe_
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}
fn new_tdir() string {
tdir_ := os.join_path(os.temp_dir(), rand.ulid())
if os.exists(tdir_) {
os.rmdir(tdir_) or { panic(err) }
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}
os.mkdir(tdir_) or { panic(err) }
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C.atexit(cleanup_tdir)
return tdir_
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}
fn cleanup_tdir() {
println('... removing tdir: $tdir')
os.rmdir_all(tdir) or { panic(err) }
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}
fn main() {
println('> vroot: $vroot | vexe: $vexe | tdir: $tdir')
ok_fpath := os.join_path(tdir, 'single_test.v')
os.write_file(ok_fpath, 'fn test_ok(){ assert true }') ?
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check_ok('"$vexe" $ok_fpath')
check_ok('"$vexe" test $ok_fpath')
fail_fpath := os.join_path(tdir, 'failing_test.v')
os.write_file(fail_fpath, 'fn test_fail(){ assert 1 == 2 }') ?
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check_fail('"$vexe" $fail_fpath')
check_fail('"$vexe" test $fail_fpath')
check_fail('"$vexe" test $tdir')
}
fn check_ok(cmd string) string {
println('> check_ok cmd: $cmd')
res := os.exec(cmd) or { panic(err) }
if res.exit_code != 0 {
eprintln('> check_ok failed.\n$res.output')
exit(1)
}
return res.output
}
fn check_fail(cmd string) string {
println('> check_fail cmd: $cmd')
res := os.exec(cmd) or { panic(err) }
if res.exit_code == 0 {
eprintln('> check_fail succeeded, but it should have failed.\n$res.output')
exit(1)
}
return res.output
}