mirror of
https://github.com/python-pillow/Pillow.git
synced 2024-09-21 19:38:57 +03:00
311 lines
8.5 KiB
Python
311 lines
8.5 KiB
Python
"""
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Helper functions.
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"""
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from __future__ import print_function
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import sys
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if sys.version_info[:2] <= (2, 6):
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import unittest2 as unittest
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else:
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import unittest
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class PillowTestCase(unittest.TestCase):
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def assert_image(self, im, mode, size, msg=None):
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if mode is not None:
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self.assertEqual(
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im.mode, mode,
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msg or "got mode %r, expected %r" % (im.mode, mode))
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if size is not None:
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self.assertEqual(
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im.size, size,
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msg or "got size %r, expected %r" % (im.size, size))
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def assert_image_equal(self, a, b, msg=None):
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self.assertEqual(
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a.mode, b.mode,
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msg or "got mode %r, expected %r" % (a.mode, b.mode))
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self.assertEqual(
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a.size, b.size,
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msg or "got size %r, expected %r" % (a.size, b.size))
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self.assertEqual(
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a.tobytes(), b.tobytes(),
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msg or "got different content")
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def assert_image_similar(self, a, b, epsilon, msg=None):
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epsilon = float(epsilon)
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self.assertEqual(
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a.mode, b.mode,
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msg or "got mode %r, expected %r" % (a.mode, b.mode))
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self.assertEqual(
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a.size, b.size,
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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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self.assertGreaterEqual(
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epsilon, ave_diff,
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msg or "average pixel value difference %.4f > epsilon %.4f" % (
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ave_diff, epsilon))
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def assert_warning(self, warn_class, func):
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import warnings
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result = None
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with warnings.catch_warnings(record=True) as w:
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# Cause all warnings to always be triggered.
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warnings.simplefilter("always")
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# Hopefully trigger a warning.
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result = func()
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# Verify some things.
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self.assertGreaterEqual(len(w), 1)
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found = False
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for v in w:
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if issubclass(v.category, warn_class):
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found = True
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break
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self.assertTrue(found)
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return result
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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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#
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# _target = None
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# _tempfiles = []
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# _logfile = None
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#
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#
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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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#
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#
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# def failure(msg=None, frame=None):
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# import sys
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# import 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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#
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# success.count = failure.count = 0
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#
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#
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# # predicates
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#
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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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#
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#
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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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#
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#
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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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# helpers
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def fromstring(data):
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from io import BytesIO
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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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from io import BytesIO
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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 = None
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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_completely_equal(a, b, msg=None):
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# if a != b:
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# failure(msg or "images different")
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# else:
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# success()
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#
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#
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# def tempfile(template, *extra):
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# import os
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# import os.path
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# import sys
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# import 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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#
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#
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# # test runner
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#
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# def run():
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# global _target, _tests, run
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# import sys
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# import 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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#
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#
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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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#
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#
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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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#
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#
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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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#
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#
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# def _setup():
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# global _logfile
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#
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# import sys
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# if "--coverage" in sys.argv:
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# # Temporary: ignore PendingDeprecationWarning from Coverage (Py3.4)
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# with warnings.catch_warnings():
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# warnings.simplefilter("ignore")
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# import coverage
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# cov = coverage.coverage(auto_data=True, include="PIL/*")
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# cov.start()
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#
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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
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# import os.path
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# import 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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#
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# import atexit
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# atexit.register(report)
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#
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# if "--log" in sys.argv:
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# _logfile = open("test.log", "a")
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#
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#
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# _setup()
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