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# -*- coding: utf-8 -*-
"""Test Case magic
Author: Ed Rousseau <rousseau@redhat.com>"""
__author__ = "Ed Rousseau <rousseau@redhat.com>"
import os
import os.path
from config import config
from logging import ResultsLogger, TimeStamp
from PIL import Image, ImageChops, ImageStat
from __builtin__ import unicode, long
class TC(object): # pragma: no cover
"""
The Test Case Superclass
"""
logger = ResultsLogger()
def __init__(self):
self.encoding = config.encoding
# ascii + unicode. 8 bit extended char has been ripped out
self.supportedtypes = (
"ascii", "utf-8", "utf-16", "utf-16-be", "utf-16-le", "unicode-escape", "raw-unicode-escape",
"big5", "gb18030", "eucJP", "eucKR", "shiftJIS")
# String comparison function
def compare(self, label, baseline, undertest, encoding=config.encoding):
"""
Compares 2 strings to see if they are the same. The user may specify
the encoding to which the two strings are to be normalized for the
comparison. Default encoding is the default system encoding.
Normalization to extended 8 bit charactersets is not supported.
When the origin of either baseline or undertest is a text file whose
encoding is something other than ASCII, it is necessary to use
codecs.open() instead of open(), so the file's encoding may be
specified.
"""
self.label = label.strip()
self.baseline = baseline
self.undertest = undertest
for string in [self.baseline, self.undertest]:
try:
string = unicode(string, 'utf-8')
except TypeError:
pass
self.encoding = encoding
# Normalize the encoding type for the comparaison based on
# self.encoding
if self.encoding in self.supportedtypes:
self.baseline = (self.baseline).encode(self.encoding)
self.undertest = (self.undertest).encode(self.encoding)
# Compare the strings
if self.baseline == self.undertest:
self.result = {self.label: "Passed"}
else:
self.result = {self.label: "Failed - " + self.encoding +
" strings do not match. " + self.baseline + " expected: Got " + self.undertest}
# Pass the test result to the ResultsLogger for writing
TC.logger.log(self.result)
return self.result
else:
# We should probably raise an exception here
self.result = {
self.label: "ERROR - " + self.encoding + " is not a supported encoding type"}
TC.logger.log(self.result)
return self.result
# String Test Case subclass
class TCString(TC): # pragma: no cover
"""
String Test Case Class
"""
def __init__(self):
TC.__init__(self)
# Image test case subclass
class TCImage(TC): # pragma: no cover
"""
Image Test Case Class.
"""
def compare(self, label, baseline, undertest):
for _file in (baseline, undertest):
if type(_file) is not unicode and type(_file) is not str:
raise TypeError("Need filenames!")
self.label = label.strip()
self.baseline = baseline.strip()
self.undertest = undertest.strip()
diffName = TimeStamp().fileStamp("diff") + ".png"
self.diff = os.path.normpath(
os.path.sep.join((config.scratchDir, diffName)))
self.baseImage = Image.open(self.baseline)
self.testImage = Image.open(self.undertest)
try:
if self.baseImage.size != self.testImage.size:
self.result = {
self.label: "Failed - images are different sizes"}
raise StopIteration
self.diffImage = ImageChops.difference(self.baseImage,
self.testImage)
self.diffImage.save(self.diff)
result = False
for stat in ('stddev', 'mean', 'sum2'):
for item in getattr(ImageStat.Stat(self.diffImage), stat):
if item:
self.result = {self.label: "Failed - see %s" %
self.diff}
raise StopIteration
else:
result = True
except StopIteration:
result = False
if result:
self.result = {self.label: "Passed"}
TC.logger.log(self.result)
return self.result
class TCNumber(TC): # pragma: no cover
"""
Number Comparaison Test Case Class
"""
def __init__(self):
TC.__init__(self)
self.supportedtypes = ("int", "long", "float", "complex", "oct", "hex")
# Compare 2 numbers by the type provided in the type arg
def compare(self, label, baseline, undertest, type):
"""
Compares 2 numbers to see if they are the same. The user may specify
how to normalize mixed type comparisons via the type argument.
"""
self.label = label.strip()
self.baseline = baseline
self.undertest = undertest
self.type = type.strip()
# If we get a valid type, convert to that type and compare
if self.type in self.supportedtypes:
# Normalize for comparison
if self.type == "int":
self.baseline = int(self.baseline)
self.undertest = int(self.undertest)
elif self.type == "long":
self.baseline = long(self.baseline)
self.undertest = long(self.undertest)
elif self.type == "float":
self.baseline = float(self.baseline)
self.undertest = float(self.undertest)
else:
self.baseline = complex(self.baseline)
self.undertest = complex(self.undertest)
# compare
if self.baseline == self.undertest:
self.result = {self.label: "Passed - numbers are the same"}
else:
self.result = {self.label: "Failed - " + str(
self.baseline) + " expected: Got " + str(self.undertest)}
TC.logger.log(self.result)
return self.result
else:
self.result = {
self.label: "Failed - " + self.type + " is not in list of supported types"}
TC.logger.log(self.result)
return self.result
class TCBool(TC): # pragma: no cover
def __init__(self):
pass
def compare(self, label, _bool):
"""
If _bool is True, pass.
If _bool is False, fail.
"""
if type(_bool) is not bool:
raise TypeError
if _bool:
result = {label: "Passed"}
else:
result = {label: "Failed"}
TC.logger.log(result)
from tree import Node
class TCNode(TC): # pragma: no cover
def __init__(self):
pass
def compare(self, label, baseline, undertest):
"""
If baseline is None, simply check that undertest is a Node.
If baseline is a Node, check that it is equal to undertest.
"""
if baseline is not None and not isinstance(baseline, Node):
raise TypeError
if not isinstance(undertest, Node):
result = {label: "Failed - %s is not a Node" % undertest}
elif baseline is None:
result = {label: "Passed - %s is a Node" % undertest}
elif isinstance(baseline, Node):
if baseline == undertest:
result = {label: "Passed - %s == %s" % (baseline, undertest)}
else:
result = {label: "Failed - %s != %s" % (baseline, undertest)}
TC.logger.log(result)
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