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