mirror of
https://github.com/python-pillow/Pillow.git
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305 lines
8.5 KiB
Python
305 lines
8.5 KiB
Python
from __future__ import print_function
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# require that deprecation warnings are triggered
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import warnings
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warnings.simplefilter('default')
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# temporarily turn off resource warnings that warn about unclosed
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# files in the test scripts.
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try:
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warnings.filterwarnings("ignore", category=ResourceWarning)
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except NameError:
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# we expect a NameError on py2.x, since it doesn't have ResourceWarnings.
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pass
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import sys
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py3 = (sys.version_info >= (3,0))
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# some test helpers
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_target = None
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_tempfiles = []
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_logfile = None
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def success():
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import sys
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success.count += 1
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if _logfile:
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print(sys.argv[0], success.count, failure.count, file=_logfile)
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return True
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def failure(msg=None, frame=None):
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import sys, linecache
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failure.count += 1
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if _target:
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if frame is None:
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frame = sys._getframe()
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while frame.f_globals.get("__name__") != _target.__name__:
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frame = frame.f_back
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location = (frame.f_code.co_filename, frame.f_lineno)
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prefix = "%s:%d: " % location
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line = linecache.getline(*location)
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print(prefix + line.strip() + " failed:")
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if msg:
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print("- " + msg)
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if _logfile:
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print(sys.argv[0], success.count, failure.count, file=_logfile)
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return False
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success.count = failure.count = 0
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# predicates
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def assert_true(v, msg=None):
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if v:
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success()
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else:
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failure(msg or "got %r, expected true value" % v)
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def assert_false(v, msg=None):
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if v:
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failure(msg or "got %r, expected false value" % v)
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else:
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success()
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def assert_equal(a, b, msg=None):
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if a == b:
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success()
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else:
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failure(msg or "got %r, expected %r" % (a, b))
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def assert_almost_equal(a, b, msg=None, eps=1e-6):
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if abs(a-b) < eps:
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success()
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else:
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failure(msg or "got %r, expected %r" % (a, b))
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def assert_deep_equal(a, b, msg=None):
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try:
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if len(a) == len(b):
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if all([x==y for x,y in zip(a,b)]):
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success()
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else:
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failure(msg or "got %s, expected %s" % (a,b))
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else:
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failure(msg or "got length %s, expected %s" % (len(a), len(b)))
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except:
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assert_equal(a,b,msg)
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def assert_match(v, pattern, msg=None):
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import re
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if re.match(pattern, v):
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success()
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else:
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failure(msg or "got %r, doesn't match pattern %r" % (v, pattern))
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def assert_exception(exc_class, func):
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import sys, traceback
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try:
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func()
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except exc_class:
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success()
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except:
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failure("expected %r exception, got %r" % (
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exc_class.__name__, sys.exc_info()[0].__name__))
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traceback.print_exc()
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else:
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failure("expected %r exception, got no exception" % exc_class.__name__)
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def assert_no_exception(func):
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import sys, traceback
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try:
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func()
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except:
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failure("expected no exception, got %r" % sys.exc_info()[0].__name__)
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traceback.print_exc()
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else:
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success()
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def assert_warning(warn_class, func):
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# note: this assert calls func three times!
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import warnings
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def warn_error(message, category, **options):
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raise category(message)
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def warn_ignore(message, category, **options):
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pass
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warn = warnings.warn
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result = None
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try:
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warnings.warn = warn_ignore
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assert_no_exception(func)
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result = func()
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warnings.warn = warn_error
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assert_exception(warn_class, func)
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finally:
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warnings.warn = warn # restore
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return result
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# helpers
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from io import BytesIO
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def fromstring(data):
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from PIL import Image
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return Image.open(BytesIO(data))
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def tostring(im, format, **options):
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out = BytesIO()
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im.save(out, format, **options)
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return out.getvalue()
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def lena(mode="RGB", cache={}):
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from PIL import Image
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im = cache.get(mode)
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if im is None:
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if mode == "RGB":
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im = Image.open("Images/lena.ppm")
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elif mode == "F":
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im = lena("L").convert(mode)
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elif mode[:4] == "I;16":
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im = lena("I").convert(mode)
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else:
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im = lena("RGB").convert(mode)
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cache[mode] = im
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return im
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def assert_image(im, mode, size, msg=None):
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if mode is not None and im.mode != mode:
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failure(msg or "got mode %r, expected %r" % (im.mode, mode))
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elif size is not None and im.size != size:
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failure(msg or "got size %r, expected %r" % (im.size, size))
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else:
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success()
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def assert_image_equal(a, b, msg=None):
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if a.mode != b.mode:
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failure(msg or "got mode %r, expected %r" % (a.mode, b.mode))
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elif a.size != b.size:
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failure(msg or "got size %r, expected %r" % (a.size, b.size))
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elif a.tobytes() != b.tobytes():
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failure(msg or "got different content")
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# generate better diff?
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else:
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success()
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def assert_image_similar(a, b, epsilon, msg=None):
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epsilon = float(epsilon)
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if a.mode != b.mode:
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return failure(msg or "got mode %r, expected %r" % (a.mode, b.mode))
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elif a.size != b.size:
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return failure(msg or "got size %r, expected %r" % (a.size, b.size))
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diff = 0
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try:
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ord(b'0')
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for abyte,bbyte in zip(a.tobytes(),b.tobytes()):
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diff += abs(ord(abyte)-ord(bbyte))
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except:
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for abyte,bbyte in zip(a.tobytes(),b.tobytes()):
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diff += abs(abyte-bbyte)
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ave_diff = float(diff)/(a.size[0]*a.size[1])
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if epsilon < ave_diff:
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return failure(msg or "average pixel value difference %.4f > epsilon %.4f" %(ave_diff, epsilon))
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else:
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return success()
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def tempfile(template, *extra):
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import os, os.path, sys, tempfile
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files = []
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root = os.path.join(tempfile.gettempdir(), 'pillow-tests')
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try:
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os.mkdir(root)
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except OSError:
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pass
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for temp in (template,) + extra:
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assert temp[:5] in ("temp.", "temp_")
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name = os.path.basename(sys.argv[0])
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name = temp[:4] + os.path.splitext(name)[0][4:]
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name = name + "_%d" % len(_tempfiles) + temp[4:]
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name = os.path.join(root, name)
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files.append(name)
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_tempfiles.extend(files)
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return files[0]
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# test runner
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def run():
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global _target, _tests, run
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import sys, traceback
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_target = sys.modules["__main__"]
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run = None # no need to run twice
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tests = []
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for name, value in list(vars(_target).items()):
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if name[:5] == "test_" and type(value) is type(success):
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tests.append((value.__code__.co_firstlineno, name, value))
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tests.sort() # sort by line
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for lineno, name, func in tests:
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try:
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_tests = []
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func()
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for func, args in _tests:
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func(*args)
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except:
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t, v, tb = sys.exc_info()
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tb = tb.tb_next
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if tb:
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failure(frame=tb.tb_frame)
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traceback.print_exception(t, v, tb)
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else:
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print("%s:%d: cannot call test function: %s" % (
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sys.argv[0], lineno, v))
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failure.count += 1
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def yield_test(function, *args):
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# collect delayed/generated tests
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_tests.append((function, args))
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def skip(msg=None):
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import os
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print("skip")
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os._exit(0) # don't run exit handlers
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def ignore(pattern):
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"""Tells the driver to ignore messages matching the pattern, for the
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duration of the current test."""
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print('ignore: %s' % pattern)
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def _setup():
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global _logfile
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def report():
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if run:
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run()
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if success.count and not failure.count:
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print("ok")
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# only clean out tempfiles if test passed
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import os, os.path, tempfile
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for file in _tempfiles:
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try:
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os.remove(file)
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except OSError:
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pass # report?
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temp_root = os.path.join(tempfile.gettempdir(), 'pillow-tests')
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try:
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os.rmdir(temp_root)
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except OSError:
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pass
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if "--coverage" in sys.argv:
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import coverage
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coverage.stop()
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# The coverage module messes up when used from inside an
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# atexit handler. Do an explicit save to make sure that
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# we actually flush the coverage cache.
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coverage.the_coverage.save()
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import atexit, sys
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atexit.register(report)
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if "--coverage" in sys.argv:
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import coverage
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coverage.start()
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if "--log" in sys.argv:
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_logfile = open("test.log", "a")
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_setup()
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