1  #!/usr/bin/env python3
       2  
       3  # Runs a subsetting test suite. Compares the results of subsetting via harfbuzz
       4  # to subsetting via fonttools.
       5  
       6  from difflib import unified_diff
       7  import os
       8  import re
       9  import subprocess
      10  import sys
      11  import tempfile
      12  import shutil
      13  import io
      14  
      15  from repack_test import RepackTest
      16  
      17  try:
      18  	from fontTools.ttLib import TTFont
      19  except ImportError:
      20  	print ("fonttools is not present, skipping test.")
      21  	sys.exit (77)
      22  
      23  ots_sanitize = shutil.which ("ots-sanitize")
      24  
      25  def subset_cmd (command):
      26  	global hb_subset, process
      27  	print (hb_subset + ' ' + " ".join(command))
      28  	process.stdin.write ((';'.join (command) + '\n').encode ("utf-8"))
      29  	process.stdin.flush ()
      30  	return process.stdout.readline().decode ("utf-8").strip ()
      31  
      32  def cmd (command):
      33  	p = subprocess.Popen (
      34  		command, stdout=subprocess.PIPE, stderr=subprocess.PIPE,
      35  		universal_newlines=True)
      36  	(stdoutdata, stderrdata) = p.communicate ()
      37  	print (stderrdata, end="", file=sys.stderr)
      38  	return stdoutdata, p.returncode
      39  
      40  def fail_test (test, cli_args, message):
      41  	print ('ERROR: %s' % message)
      42  	print ('Test State:')
      43  	print ('  test.font_name    %s' % test.font_name)
      44  	print ('  test.test_path %s' % os.path.abspath (test.test_path))
      45  	return 1
      46  
      47  def run_test (test, should_check_ots):
      48  	out_file = os.path.join (tempfile.mkdtemp (), test.font_name + '-subset.ttf')
      49  	cli_args = ["--font-file=" + test.font_path (),
      50  		    "--output-file=" + out_file,
      51  		    "--unicodes=%s" % test.codepoints_string (),
      52  		    "--drop-tables-=GPOS,GSUB,GDEF",]
      53  	print (' '.join (cli_args))
      54  	ret = subset_cmd (cli_args)
      55  
      56  	if ret != "success":
      57  		return fail_test (test, cli_args, "%s failed" % ' '.join (cli_args))
      58  
      59  	try:
      60  		with TTFont (out_file) as font:
      61  			pass
      62  	except Exception as e:
      63  		print (e)
      64  		return fail_test (test, cli_args, "ttx failed to parse the result")
      65  
      66  	if should_check_ots:
      67  		print ("Checking output with ots-sanitize.")
      68  		if not check_ots (out_file):
      69  			return fail_test (test, cli_args, 'ots for subsetted file fails.')
      70  
      71  	return 0
      72  
      73  def has_ots ():
      74  	if not ots_sanitize:
      75  		print ("OTS is not present, skipping all ots checks.")
      76  		return False
      77  	return True
      78  
      79  def check_ots (path):
      80  	ots_report, returncode = cmd ([ots_sanitize, path])
      81  	if returncode:
      82  		print ("OTS Failure: %s" % ots_report)
      83  		return False
      84  	return True
      85  
      86  args = sys.argv[1:]
      87  if not args or sys.argv[1].find ('hb-subset') == -1 or not os.path.exists (sys.argv[1]):
      88  	sys.exit ("First argument does not seem to point to usable hb-subset.")
      89  hb_subset, args = args[0], args[1:]
      90  
      91  if len (args) != 1:
      92  	sys.exit ("No tests supplied.")
      93  
      94  has_ots = has_ots()
      95  
      96  process = subprocess.Popen ([hb_subset, '--batch'],
      97                              stdin=subprocess.PIPE,
      98                              stdout=subprocess.PIPE,
      99                              stderr=sys.stdout)
     100  
     101  fails = 0
     102  
     103  path = args[0]
     104  if not path.endswith(".tests"):
     105          sys.exit ("Not a valid test case path.")
     106  
     107  with open (path, mode="r", encoding="utf-8") as f:
     108  	# TODO(garretrieger): re-enable OTS checking.
     109  	fails += run_test (RepackTest (path, f.read ()), False)
     110  
     111  
     112  if fails != 0:
     113  	sys.exit ("%d test(s) failed." % fails)
     114  else:
     115  	print ("All tests passed.")