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import optparse
class CoverageTestWrapper(object):
"""
A Coverage Test Wrapper.
1) Setup the with the parsed options
2) Call start()
3) Run your tests
4) Call finish()
5) Improve your code coverage ;)
"""
def __init__(self, options, _covpkg=None):
self.options = options
# _covpkg is for dependency injection, so we can test this code.
if _covpkg:
self.covpkg = _covpkg
else:
import coverage
self.covpkg = coverage
self.coverage = None
def start(self):
# Set up coverage
self.coverage = self.covpkg.coverage(
data_suffix = bool(self.options.cover_parallel_mode),
cover_pylib = self.options.cover_pylib,
timid = self.options.cover_timid,
branch = self.options.cover_branch,
)
# Run the script.
self.coverage.start()
def finish(self):
# end coverage and save the results
self.coverage.stop()
self.coverage.save()
# Remaining actions are reporting, with some common self.options.
report_args = {
'morfs': [],
'ignore_errors': self.options.cover_ignore_errors,
}
# Handle any omits
# Allow pointing to a file as well
try:
omit_file = open(self.options.cover_omit)
omit_prefixes = [line.strip() for line in omit_file.readlines()]
report_args['omit_prefixes'] = omit_prefixes
except:
omit = self.options.cover_omit.split(',')
report_args['omit_prefixes'] = omit
if 'report' in self.options.cover_actions:
self.coverage.report(
show_missing=self.options.cover_show_missing, **report_args)
if 'annotate' in self.options.cover_actions:
self.coverage.annotate(
directory=self.options.cover_directory, **report_args)
if 'html' in self.options.cover_actions:
self.coverage.html_report(
directory=self.options.cover_directory, **report_args)
if 'xml' in self.options.cover_actions:
outfile = self.options.cover_outfile
if outfile == '-':
outfile = None
self.coverage.xml_report(outfile=outfile, **report_args)
return
options = [
optparse.Option('',
'--cover-action', action='append', default=None,
dest='cover_actions', type="choice", choices=['annotate', 'html', 'report', 'xml'],
help="""\
annotate Annotate source files with execution information.
html Create an HTML report.
report Report coverage stats on modules.
xml Create an XML report of coverage results.
""".strip()),
optparse.Option(
'--cover-branch', action='store_true',
help="Measure branch execution. HIGHLY EXPERIMENTAL!"
),
optparse.Option(
'--cover-directory', action='store',
metavar="DIR",
help="Write the output files to DIR."
),
optparse.Option(
'--cover-ignore-errors', action='store_true',
help="Ignore errors while reading source files."
),
optparse.Option(
'--cover-pylib', action='store_true',
help="Measure coverage even inside the Python installed library, "
"which isn't done by default."
),
optparse.Option(
'--cover-show-missing', action='store_true',
help="Show line numbers of statements in each module that weren't "
"executed."
),
optparse.Option(
'--cover-omit', action='store',
metavar="PRE1,PRE2,...",
default='',
help="Omit files when their filename path starts with one of these "
"prefixes."
),
optparse.Option(
'--cover-outfile', action='store',
metavar="OUTFILE",
help="Write the XML report to this file. Defaults to 'coverage.xml'"
),
optparse.Option(
'--cover-parallel-mode', action='store_true',
help="Include the machine name and process id in the .coverage "
"data file name."
),
optparse.Option(
'--cover-timid', action='store_true',
help="Use a simpler but slower trace method. Try this if you get "
"seemingly impossible results!"
),
optparse.Option(
'--cover-append', action='store_false',
help="Append coverage data to .coverage, otherwise it is started "
"clean with each run."
)
]
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