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