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import re
try:
import json
except ImportError:
import simplejson as json
import pytest
import docopt
def pytest_collect_file(path, parent):
if path.ext == ".docopt" and path.basename.startswith("test"):
return DocoptTestFile(path, parent)
def parse_test(raw):
raw = re.compile('#.*$', re.M).sub('', raw).strip()
if raw.startswith('"""'):
raw = raw[3:]
for fixture in raw.split('r"""'):
name = ''
doc, _, body = fixture.partition('"""')
cases = []
for case in body.split('$')[1:]:
argv, _, expect = case.strip().partition('\n')
expect = json.loads(expect)
prog, _, argv = argv.strip().partition(' ')
cases.append((prog, argv, expect))
yield name, doc, cases
class DocoptTestFile(pytest.File):
def collect(self):
raw = self.fspath.open().read()
index = 1
for name, doc, cases in parse_test(raw):
name = self.fspath.purebasename
for case in cases:
yield DocoptTestItem("%s(%d)" % (name, index), self, doc, case)
index += 1
class DocoptTestItem(pytest.Item):
def __init__(self, name, parent, doc, case):
super(DocoptTestItem, self).__init__(name, parent)
self.doc = doc
self.prog, self.argv, self.expect = case
def runtest(self):
try:
result = docopt.docopt(self.doc, argv=self.argv)
except docopt.DocoptExit:
result = 'user-error'
if self.expect != result:
raise DocoptTestException(self, result)
def repr_failure(self, excinfo):
"""Called when self.runtest() raises an exception."""
if isinstance(excinfo.value, DocoptTestException):
return "\n".join((
"usecase execution failed:",
self.doc.rstrip(),
"$ %s %s" % (self.prog, self.argv),
"result> %s" % json.dumps(excinfo.value.args[1]),
"expect> %s" % json.dumps(self.expect),
))
def reportinfo(self):
return self.fspath, 0, "usecase: %s" % self.name
class DocoptTestException(Exception):
pass