runtest.py

   1 #!/usr/bin/env python
   2
   3 import os, sys, re
   4 import argparse, time
   5
   6 import pty
   7 from subprocess import Popen, STDOUT, PIPE
   8 from select import select
   9
  10 # TODO: do we need to support '\n' too
  11 sep = "\r\n"
  12 #sep = "\n"
  13 rundir = None
  14
  15 parser = argparse.ArgumentParser(
  16         description="Run a test file against a Mal implementation")
  17 parser.add_argument('--rundir',
  18         help="change to the directory before running tests")
  19 parser.add_argument('--start-timeout', default=10, type=int,
  20         help="default timeout for initial prompt")
  21 parser.add_argument('--test-timeout', default=20, type=int,
  22         help="default timeout for each individual test action")
  23 parser.add_argument('--pre-eval', default=None, type=str,
  24         help="Mal code to evaluate prior to running the test")
  25 parser.add_argument('--redirect', action='store_true',
  26         help="Run implementation in bash and redirect output to /dev/null")
  27
  28 parser.add_argument('test_file', type=argparse.FileType('r'),
  29         help="a test file formatted as with mal test data")
  30 parser.add_argument('mal_cmd', nargs="*",
  31         help="Mal implementation command line. Use '--' to "
  32              "specify a Mal command line with dashed options.")
  33
  34 class Runner():
  35     def __init__(self, args, redirect=False):
  36         print "args: %s" % repr(args)
  37         if redirect:
  38             print "using redirect"
  39             self.p = Popen(args, bufsize=0, stdin=PIPE, stdout=PIPE, stderr=STDOUT)
  40             self.stdin = self.p.stdin
  41             self.stdout = self.p.stdout
  42         else:
  43             # provide tty to get 'interactive' readline to work
  44             master, slave = pty.openpty()
  45             self.p = Popen(args, bufsize=0, stdin=slave, stdout=slave, stderr=STDOUT)
  46             self.stdin = os.fdopen(master, 'r+b', 0)
  47             self.stdout = self.stdin
  48
  49         #print "started"
  50         self.buf = ""
  51         self.last_prompt = ""
  52
  53     def read_to_prompt(self, prompts, timeout):
  54         end_time = time.time() + timeout
  55         while time.time() < end_time:
  56             [outs,_,_] = select([self.stdin], [], [], 1)
  57             if self.stdin in outs:
  58                 new_data = self.stdin.read(1)
  59                 #print "new_data: '%s'" % new_data
  60                 self.buf += new_data
  61                 for prompt in prompts:
  62                     regexp = re.compile(prompt)
  63                     match = regexp.search(self.buf)
  64                     if match:
  65                         end = match.end()
  66                         buf = self.buf[0:end-len(prompt)]
  67                         self.buf = self.buf[end:]
  68                         self.last_prompt = prompt
  69                         return buf
  70         return None
  71
  72     def write(self, str):
  73         self.stdout.write(str)
  74
  75     def cleanup(self):
  76         if self.p:
  77             self.p.terminate()
  78             self.p = None
  79
  80
  81 args = parser.parse_args(sys.argv[1:])
  82 test_data = args.test_file.read().split('\n')
  83
  84 if args.rundir: os.chdir(args.rundir)
  85
  86 r = Runner(args.mal_cmd, redirect=args.redirect)
  87
  88
  89 test_idx = 0
  90 def read_test(data):
  91     global test_idx
  92     form, output, ret = None, "", None
  93     while data:
  94         test_idx += 1
  95         line = data.pop(0)
  96         if re.match(r"^\s*$", line):   # blank line
  97             continue
  98         elif line[0:3] == ";;;":       # ignore comment
  99             continue
 100         elif line[0:2] == ";;":        # output comment
 101             print line[3:]
 102             continue
 103         elif line[0:2] == ";":         # unexpected comment
 104             print "Test data error at line %d:\n%s" % (test_idx, line)
 105             return None, None, None, test_idx
 106         form = line   # the line is a form to send
 107
 108         # Now find the output and return value
 109         while data:
 110             line = data[0]
 111             if line[0:3] == ";=>":
 112                 ret = line[3:].replace('\\r', '\r').replace('\\n', '\n')
 113                 test_idx += 1
 114                 data.pop(0)
 115                 break
 116             elif line[0:2] == "; ":
 117                 output = output + line[2:] + sep
 118                 test_idx += 1
 119                 data.pop(0)
 120             else:
 121                 ret = "*"
 122                 break
 123         if ret: break
 124
 125     return form, output, ret, test_idx
 126
 127 def assert_prompt(timeout):
 128     # Wait for the initial prompt
 129     header = r.read_to_prompt(['user> ', 'mal-user> '], timeout=timeout)
 130     if not header == None:
 131         if header:
 132             print "Started with:\n%s" % header
 133     else:
 134         print "Did not get 'user> ' or 'mal-user> ' prompt"
 135         print "    Got      : %s" % repr(r.buf)
 136         r.cleanup()
 137         sys.exit(1)
 138
 139
 140 # Wait for the initial prompt
 141 assert_prompt(args.start_timeout)
 142
 143 # Send the pre-eval code if any
 144 if args.pre_eval:
 145     sys.stdout.write("RUNNING pre-eval: %s" % args.pre_eval)
 146     p.write(args.pre_eval)
 147     assert_prompt(args.test_timeout)
 148
 149 fail_cnt = 0
 150
 151 while test_data:
 152     form, out, ret, line_num = read_test(test_data)
 153     if form == None:
 154         break
 155     sys.stdout.write("TEST: %s -> [%s,%s]" % (form, repr(out), repr(ret)))
 156     sys.stdout.flush()
 157     expected = "%s%s%s%s" % (form, sep, out, ret)
 158
 159     r.write(form + "\n")
 160     try:
 161         res = r.read_to_prompt(['\r\nuser> ', '\nuser> ',
 162                                 '\r\nmal-user> ', '\nmal-user> '],
 163                                 timeout=args.test_timeout)
 164         #print "%s,%s,%s" % (idx, repr(p.before), repr(p.after))
 165         if ret == "*" or res == expected:
 166             print " -> SUCCESS"
 167         else:
 168             print " -> FAIL (line %d):" % line_num
 169             print "    Expected : %s" % repr(expected)
 170             print "    Got      : %s" % repr(res)
 171             fail_cnt += 1
 172     except:
 173         print "Got Exception"
 174         r.cleanup()
 175         sys.exit(1)
 176 r.cleanup()
 177
 178 if fail_cnt > 0:
 179     print "FAILURES: %d" % fail_cnt
 180     sys.exit(2)
 181 sys.exit(0)