source: src/tests/test.py@ b542bfb

#!/usr/bin/python
from __future__ import print_function

from os import listdir, environ
from os.path import isfile, join, splitext
from subprocess import Popen, PIPE, STDOUT

import argparse
import os
import re
import stat
import sys

################################################################################
#               help functions
################################################################################

# Test class that defines what a test is
class Test:
    def __init__(self, name, path):
        self.name, self.path = name, path

# parses the Makefile to find the machine type (32-bit / 64-bit)
def getMachineType():
        sh('echo "int main() { return 0; }" > .dummy.c')
        sh("make .dummy", print2stdout=False)
        _, out = sh("file .dummy", print2stdout=False)
        sh("rm -f .dummy.c > /dev/null 2>&1")
        sh("rm -f .dummy > /dev/null 2>&1")
        return re.search("ELF\s([0-9]+)-bit", out).group(1)

# reads the directory ./.expect and indentifies the tests
def listTests():
        machineType = getMachineType()

        # tests directly in the .expect folder will always be processed
        generic_list = map(lambda fname: Test(fname, fname),
                [splitext(f)[0] for f in listdir('./.expect')
                if not f.startswith('.') and f.endswith('.txt')
                ])

        # tests in the machineType folder will be ran only for the corresponding compiler
        typed_list = map(lambda fname: Test( fname, "%s/%s" % (machineType, fname) ),
                [splitext(f)[0] for f in listdir("./.expect/%s" % machineType)
                if not f.startswith('.') and f.endswith('.txt')
                ])

        # append both lists to get
        return generic_list + typed_list

# helper functions to run terminal commands
def sh(cmd, dry_run = False, print2stdout = True):
        if dry_run :    # if this is a dry_run, only print the commands that would be ran
                print("cmd: %s" % cmd)
                return 0, None
        else :                  # otherwise create a pipe and run the desired command
                proc = Popen(cmd, stdout=None if print2stdout else PIPE, stderr=STDOUT, shell=True)
                out, err = proc.communicate()
                return proc.returncode, out

# helper function to replace patterns in a file
def file_replace(fname, pat, s_after):
    # first, see if the pattern is even in the file.
    with open(fname) as f:
        if not any(re.search(pat, line) for line in f):
            return # pattern does not occur in file so we are done.

    # pattern is in the file, so perform replace operation.
    with open(fname) as f:
        out_fname = fname + ".tmp"
        out = open(out_fname, "w")
        for line in f:
            out.write(re.sub(pat, s_after, line))
        out.close()
        os.rename(out_fname, fname)

# tests output may differ depending on the depth of the makefile
def fix_MakeLevel(file) :
        if environ.get('MAKELEVEL') :
                file_replace(file, "make\[%i\]" % int(environ.get('MAKELEVEL')), 'make' )

# helper function to check if a files contains only a spacific string
def fileContainsOnly(file, text) :
        with open(file) as f:
                ff = f.read().strip()
                result = ff == text.strip()

                return result;

# check whether or not a file is executable
def fileIsExecutable(file) :
        try :
                fileinfo = os.stat(file)
                return bool(fileinfo.st_mode & stat.S_IXUSR)
        except Exception as inst:
                print(type(inst))    # the exception instance
                print(inst.args)     # arguments stored in .args
                print(inst)
                return False

################################################################################
#               running test functions
################################################################################
def run_test_instance(test, generate, dry_run):

        # find the output file based on the test name and options flag
        out_file = (".out/%s.log" % test.name) if not generate else (".expect/%s.txt" % test.path)

        # remove any outputs from the previous tests to prevent side effects
        sh("rm -f %s" % out_file, dry_run)
        sh("rm -f %s > /dev/null 2>&1" % test.name, dry_run)

        # build, skipping to next test on error
        make_ret, _ = sh("%s %s 2> %s 1> /dev/null" % (make_cmd, test.name, out_file), dry_run)

        # if the make command succeds continue otherwise skip to diff
        if make_ret == 0 :
                # fetch optional input
                stdinput = "< .in/%s.txt" % test.name if isfile(".in/%s.txt" % test.path) else ""

                if fileIsExecutable(test.name) :
                        # run test
                        sh("./%s %s > %s 2>&1" % (test.name, stdinput, out_file), dry_run)
                else :
                        # simply cat the result into the output
                        sh("cat %s > %s" % (test.name, out_file), dry_run)

        retcode = 0
        error = None

        # fix output to prevent make depth to cause issues
        fix_MakeLevel(out_file)

        if generate :
                # if we are ounly generating the output we still need to check that the test actually exists
                if not dry_run and fileContainsOnly(out_file, "make: *** No rule to make target `%s'.  Stop." % test.name) :
                        retcode = 1;
                        error = "\t\tNo make target for test %s!" % test.name
                        sh("rm %s" % out_file, False)

        else :
                # diff the output of the files
                diff_cmd = ("diff --old-group-format='\t\tmissing lines :\n"
                                        "%%<' \\\n"
                                        "--new-group-format='\t\tnew lines :\n"
                                        "%%>' \\\n"
                                        "--unchanged-group-format='%%=' \\"
                                        "--changed-group-format='\t\texpected :\n"
                                        "%%<\n"
                                        "\t\tgot :\n"
                                        "%%>' \\\n"
                                        "--new-line-format='\t\t%%dn\t%%L' \\\n"
                                        "--old-line-format='\t\t%%dn\t%%L' \\\n"
                                        "--unchanged-line-format='' \\\n"
                                        ".expect/%s.txt .out/%s.log")

                # fetch return code and error from the diff command
                retcode, error = sh(diff_cmd % (test.path, test.name), dry_run, False)

        # clean the executable
        sh("rm -f %s > /dev/null 2>&1" % test.name, dry_run)

        return retcode, error

# run the given list of tests with the given parameters
def run_tests(tests, generate, dry_run, jobs) :
        # clean the sandbox from previous commands
        sh("%s clean > /dev/null 2>&1" % make_cmd, dry_run)

        #make sure the required folder are present
        sh('mkdir -p .out .expect', dry_run)

        if generate :
                print( "Regenerate tests for: " )

        failed = False;
        # for eeach test to run
        for t in tests:
                # print formated name
                name_txt = "%20s  " % t.name

                #run the test instance and collect the result
                test_failed, error = run_test_instance(t, generate, dry_run)

                # aggregate test suite result
                failed = test_failed or failed

                # update output based on current action
                if generate :
                        failed_txt = "ERROR"
                        success_txt = "Done"
                else :
                        failed_txt = "FAILED"
                        success_txt = "PASSED"

                #print result with error if needed
                text = name_txt + (failed_txt if test_failed else success_txt)
                out = sys.stdout
                if error :
                        text = text + "\n" + error
                        out = sys.stderr

                print(text, file = out);
                sys.stdout.flush()
                sys.stderr.flush()


        #clean the workspace
        sh("%s clean > /dev/null 2>&1" % make_cmd, dry_run)

        return 1 if failed else 0

################################################################################
#               main loop
################################################################################
# create a parser with the arguments for the tests script
parser = argparse.ArgumentParser(description='Script which runs cforall tests')
parser.add_argument('--dry-run', help='Don\'t run the tests, only output the commands', action='store_true')
parser.add_argument('--list', help='List all test available', action='store_true')
parser.add_argument('--all', help='Run all test available', action='store_true')
parser.add_argument('--regenerate-expected', help='Regenerate the .expect by running the specified tets, can be used with --all option', action='store_true')
parser.add_argument('-j', '--jobs', help='Number of tests to run simultaneously', type=int, default='8')
parser.add_argument('tests', metavar='test', type=str, nargs='*', help='a list of tests to run')

# parse the command line arguments
options = parser.parse_args()

# script must have at least some tests to run
if (len(options.tests) > 0  and     options.all and not options.list) \
or (len(options.tests) == 0 and not options.all and not options.list) :
        print('ERROR: must have option \'--all\' or non-empty test list', file=sys.stderr)
        parser.print_help()
        sys.exit(1)

# fetch the liest of all valid tests
allTests = listTests()

# if user wants all tests than no other treatement of the test list is required
if options.all or options.list :
        tests = allTests

else :
        #otherwise we need to validate that the test list that was entered is valid
        tests = []

        # if we are regenerating the tests we need to find the information of the
        # already existing tests and create new info for the new tests
        if options.regenerate_expected :
                for testname in options.tests :
                        if testname.endswith(".c") or testname.endswith(".cc") or testname.endswith(".cpp") :
                                print('ERROR: "%s", tests are not allowed to end with a C/C++/CFA extension, ignoring it' % testname, file=sys.stderr)
                        else :
                                found = [test for test in allTests if test.name == testname]
                                tests.append( found[0] if len(found) == 1 else Test(testname, testname) )

        else :
                # otherwise we only need to validate that all tests are present in the complete list
                for testname in options.tests:
                        test = [t for t in allTests if t.name == testname]

                        if len(test) != 0 :
                                tests.append( test[0] )
                        else :
                                print('ERROR: No expected file for test %s, ignoring it' % testname, file=sys.stderr)

        # make sure we have at least some test to run
        if len(tests) == 0 :
                print('ERROR: No valid test to run', file=sys.stderr)
                sys.exit(1)

# sort the test alphabetically for convenience
tests.sort(key=lambda t: t.name)

# check if the user already passed in a number of jobs for multi-threading
make_flags = environ.get('MAKEFLAGS')
make_has_max_jobs = re.search("(-j|--jobs)\s*([0-9]+)", make_flags) if make_flags else None
make_max_jobs = make_has_max_jobs.group(2) if make_has_max_jobs else None
make_cmd = "make" if make_flags and "-j" in make_flags else "make -j8"

# make sure we have a valid number of jobs that corresponds to user input
options.jobs = int(make_max_jobs) if make_max_jobs else options.jobs
if options.jobs <= 0 :
        print('ERROR: Invalid number of jobs', file=sys.stderr)
        sys.exit(1)

# users may want to simply list the tests
if options.list :
        print("\n".join(map(lambda t: "%s (%s)" % (t.name, t.path), tests)))

else :
        # otherwise run all tests and make sure to return the correct error code
        sys.exit( run_tests(tests, options.regenerate_expected, options.dry_run, options.jobs) )