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expected.py
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expected.py
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import os
import sys
import copy
from collections import OrderedDict
import StringIO
class ManifestError(Exception):
pass
def decode(byte_str):
return byte_str.decode("string_escape").decode("utf8")
def encode(unicode_str):
return unicode_str.encode("utf8").encode("string_escape")
def manifest_tokenizer(f):
comment_chars = "#;"
seperators = ":="
for line in f:
line = line.strip()
if not line:
continue
elif line[0] in comment_chars:
continue
elif line.startswith("[") and line.endswith("]"):
yield "section", decode(line[1:-1])
for seperator in seperators:
if seperator in line: #Need to deal with continuation lines and things also
key, value = tuple(decode(part) for part in line.split(seperator, 1))
yield "variable", (key, value)
class ExpectedData(object):
def __init__(self, path=None):
self.path = path
self.data = OrderedDict()
self.data["DEFAULT"] = OrderedDict()
self.data["FILE"] = OrderedDict()
self.reserved_names = ["DEFAULT", "FILE"]
def __str__(self):
return dumps(self)
def add_subtest(self, name):
if name in self.reserved_names:
raise ValueError
if name in self.data:
raise ValueError("Duplicate subtest name")
self.data[name] = OrderedDict()
def remove_subtest(self, name):
if name in self.reserved_names:
raise ValueError
del self.data[name]
def has_subtest(self, name):
if name is None:
return True
return name in self.data
def set_default(self, key, value):
if value is None:
del self.data["DEFAULT"][key]
else:
self.default_data[key] = value
if self.data.get(key) == value:
del self.data[key]
for subdata in self.subdata.itervalues():
if subdata.get(key) == value:
del subdata[key]
def set(self, subtest, key, value):
if subtest in self.reserved_names:
raise ValueError
if subtest is None:
subtest = "FILE"
if subtest not in self.data:
raise ValueError("Unknown subtest %s" % subtest)
if value is None:
del self.data[subtest][key]
if (subtest not in self.reserved_names and not
self.data[subtest]):
self.remove_subtest(subtest)
else:
self.data[subtest][key] = value
def set_test(self, key, value):
self.set(None, key, value)
def get(self, subtest=None, key=None, default=None):
rv = self.data["DEFAULT"].copy()
if subtest is None:
rv.update(self.data["FILE"])
else:
rv.update(self.data.get(subtest, {}))
if key is not None:
return rv.get(key, default)
else:
return rv
def copy(self):
rv = ExpectedData(self.path)
rv.data = copy.deepcopy(self.data)
return rv
def __iter__(self):
for key in self.data.iterkeys():
if self.data[key]:
yield key
def iter_variables(self, section):
for key, value in self.data[section].iteritems():
yield key, value
def iter_subtests(self):
for key in self.data.iterkeys():
if key not in self.reserved_names:
yield key
def empty(self):
return not any(self.data.itervalues())
def load(f, path=None):
rv = ExpectedData(path)
current_section = None
for token_type, data in manifest_tokenizer(f):
if token_type == "section":
current_section = data
if data not in ("FILE", "DEFAULT"):
rv.add_subtest(data)
elif token_type == "variable":
key, value = data
if current_section is None:
raise ManifestError("Variable before section")
elif current_section == "DEFAULT":
rv.set_default(key, value)
elif current_section == "FILE":
rv.set(None, key, value)
else:
rv.set(current_section, key, value)
return rv
def dump(data, f):
for section in data:
f.write("[%s]\n" % encode(section))
for key, value in data.iter_variables(section):
f.write("%s=%s\n" % (encode(key), encode(value)))
f.write("\n")
def dumps(data):
f = StringIO.StringIO()
dump(data, f)
return f.getvalue()