live: make live_test.v more robust
Delyan Angelov
parent
7c4f2b535b
commit
d16485c29e
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@ -1,36 +1,111 @@
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import os
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import time
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/*
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The goal of this test, is to simulate a developer, that has run a program, compiled with -live flag.
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It does so by writing a new generated program containing a [live] fn pmessage() string {...} function,
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then runs the generated program at the start *in the background*,
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waits some time, so that the program could run a few iterations, then modifies its source
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(simulates a developer that has saved a new version of the program source),
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then it waits some more, modifies it again and saves it once more.
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On each modification, the running program, should detect that its source code has changed,
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and recompile a shared library, which it then it should load, and thus modify its own
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behavior at runtime (the pmessage function).
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If everything works fine, the output of the generated program would have changed at least 1-2 times,
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which then is detected by the test program (the histogram checks).
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Since this test program is sensitive to coordination (or lack of) of several processes,
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it tries to sidestep the coordination issue by polling the file system for the existance
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of files, ORIGINAL.txt ... STOP.txt , which are appended to by the generated program.
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NB: That approach of monitoring the state of the running generated program, is clearly not ideal,
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but sidesteps the issue of coordinating processes through IPC or stdin/stdout in hopefully
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not very flaky way.
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TODO: Cleanup this when/if v has better process control/communication primitives.
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*/
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const (
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vexe = os.getenv('VEXE')
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tmp_file = os.join_path(os.temp_dir(), 'generated_live_program.tmp.v')
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source_file = os.join_path(os.temp_dir(), 'generated_live_program.v')
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genexe_file = os.join_path(os.temp_dir(), 'generated_live_program')
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output_file = os.join_path(os.temp_dir(), 'generated_live_program.output.txt')
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res_original_file = os.join_path(os.temp_dir(), 'ORIGINAL.txt')
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res_changed_file = os.join_path(os.temp_dir(), 'CHANGED.txt')
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res_another_file = os.join_path(os.temp_dir(), 'ANOTHER.txt')
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res_stop_file = os.join_path(os.temp_dir(), 'STOP.txt')
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live_program_source = "
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module main
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import time
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[live]
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fn pmessage() {
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println('ORIGINAL')
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import time
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import os
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import live
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fn append_to_file(fname, s string) {
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f := os.open_append(fname) or {
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println('>>>> could not open file \$fname for appending, err: \$err ')
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return
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}
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f.writeln('\$s')
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//info := live.info()
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//f.writeln('>>> reloads: \${info.reloads} | ok reloads: \${info.reloads_ok}')
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f.flush()
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f.close()
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}
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fn myprintln(s string) {
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append_to_file('$output_file', s)
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println(s)
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os.flush()
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}
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[live]
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fn pmessage() string {
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s := 'ORIGINAL'
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myprintln(s)
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return s
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}
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const (
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delay = 5
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)
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fn main() {
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println('START')
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mut info := live.info()
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info.recheck_period_ms = 5
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myprintln('START')
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myprintln('DATE: ' + time.now().str())
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pmessage()
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time.sleep_ms(10)
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pmessage()
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for i := 0; i<3*100; i++ {
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pmessage()
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time.sleep_ms(10)
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// NB: 1000 * 5 = maximum of ~5s runtime
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for i:=0; i<1000; i++ {
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s := pmessage()
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append_to_file(os.resource_abs_path(s + '.txt'), s)
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time.sleep_ms(delay)
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if s == 'STOP' {
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break
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}
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}
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pmessage()
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time.sleep_ms(10)
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pmessage()
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println('END')
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myprintln('DATE: ' + time.now().str())
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myprintln('END')
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}
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"
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)
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fn atomic_write_source( source string ){
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// NB: here wrtiting is done in 2 steps, since os.write_file can take some time,
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// during which the file will be modified, but it will still be not completely written.
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// The os.mv after that, guarantees that the reloader will see a complete valid V program.
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os.write_file(tmp_file, source)
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os.mv(tmp_file, source_file )
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}
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//
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fn testsuite_begin() {
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if os.user_os() !in ['linux', 'solaris'] && os.getenv('FORCE_LIVE_TEST').len == 0 {
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@ -39,16 +114,15 @@ fn testsuite_begin() {
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eprintln('You can still do it by setting FORCE_LIVE_TEST=1 .')
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exit(0)
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}
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os.write_file(source_file, live_program_source)
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for f in [ tmp_file, source_file, output_file, res_original_file, res_changed_file, res_another_file, res_stop_file] {
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os.rm(f)
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}
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atomic_write_source( live_program_source )
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}
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fn testsuite_end() {
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os.rm(source_file)
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eprintln('source: $source_file')
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eprintln('output: $output_file')
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$if !windows {
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os.system('cat $output_file | sort | uniq -c | sort -n')
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}
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println('---------------------------------------------------------------------------')
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output_lines := os.read_lines(output_file) or {
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return
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@ -58,31 +132,51 @@ fn testsuite_end() {
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histogram[line] = histogram[line] + 1
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}
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for k, v in histogram {
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println('> found ${k} $v times.')
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println('> found ${v:5d} times: ${k}')
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}
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println('---------------------------------------------------------------------------')
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assert histogram['START'] > 0
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assert histogram['END'] > 0
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assert histogram['ORIGINAL'] > 0
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assert histogram['CHANGED'] + histogram['ANOTHER'] > 0
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//assert histogram['END'] > 0
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}
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fn change_source(new string) {
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time.sleep_ms(250)
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time.sleep_ms(100)
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eprintln('> change ORIGINAL to: $new')
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os.write_file(source_file, live_program_source.replace('ORIGINAL', new))
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time.sleep_ms(1000)
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eprintln('> done.')
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atomic_write_source( live_program_source.replace('ORIGINAL', new) )
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wait_for_file(new)
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}
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fn wait_for_file(new string){
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time.sleep_ms(100)
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expected_file := os.join_path(os.temp_dir(), new + '.txt')
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for i:=0 ; i <= 400 ; i++ {
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if i % 25 == 0 {
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eprintln(' checking ${i:-10d} for $expected_file ...')
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}
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if os.exists( expected_file ) {
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assert true
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eprintln('> done.')
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time.sleep_ms(100)
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break
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}
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time.sleep_ms(5)
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}
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}
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//
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fn test_live_program_can_be_compiled() {
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cmd := '$vexe -live run $source_file > $output_file &'
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eprintln('Compiling and running with: $cmd')
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eprintln('Compiling...')
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os.system('$vexe -live -o $genexe_file $source_file')
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//
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cmd := '$genexe_file > /dev/null &'
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eprintln('Running with: $cmd')
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res := os.system(cmd)
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eprintln('... running in the background')
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time.sleep_ms(1500)
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assert res == 0
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time.sleep_ms(1000)
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eprintln('... running in the background')
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wait_for_file('ORIGINAL')
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}
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fn test_live_program_can_be_changed_1() {
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@ -95,7 +189,7 @@ fn test_live_program_can_be_changed_2() {
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assert true
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}
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fn test_live_program_has_ended() {
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time.sleep_ms(3500)
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fn test_live_program_can_be_changed_3() {
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change_source('STOP')
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assert true
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}
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