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"""
Use this plugin to activate coverage report.
To install this plugin, you need to activate ``coverage-plugin``
with extra requirements :
::
$ pip install nose2[coverage-plugin]
Next, you can enable coverage reporting with :
::
$ nose2 --with-coverage
Or with this lines in ``unittest.cfg`` :
::
[coverage]
always-on = True
"""
from nose2.events import Plugin
class Coverage(Plugin):
configSection = 'coverage'
commandLineSwitch = ('C', 'with-coverage', 'Turn on coverage reporting')
def __init__(self):
"""Get our config and add our command line arguments."""
self.conSource = self.config.as_list('coverage', [])
self.conReport = self.config.as_list('coverage-report', [])
self.conConfig = self.config.as_str('coverage-config', '').strip()
group = self.session.pluginargs
group.add_argument(
'--coverage', action='append', default=[], metavar='PATH',
dest='coverage_source',
help='Measure coverage for filesystem path (multi-allowed)'
)
group.add_argument(
'--coverage-report', action='append', default=[], metavar='TYPE',
choices=['term', 'term-missing', 'annotate', 'html', 'xml'],
dest='coverage_report',
help='Generate selected reports, available types:'
' term, term-missing, annotate, html, xml (multi-allowed)'
)
group.add_argument(
'--coverage-config', action='store', default='', metavar='FILE',
dest='coverage_config',
help='Config file for coverage, default: .coveragerc'
)
def handleArgs(self, event):
"""Get our options in order command line, config file, hard coded."""
self.covSource = (event.args.coverage_source or
self.conSource or ['.'])
self.covReport = (event.args.coverage_report or
self.conReport or ['term'])
self.covConfig = (event.args.coverage_config or
self.conConfig or '.coveragerc')
def startTestRun(self, event):
"""Only called if active so start coverage."""
self.covController = None
try:
import cov_core
except:
print('Warning: you need to install [coverage-plugin] '
'extra requirements to use this plugin')
return
self.covController = cov_core.Central(self.covSource,
self.covReport,
self.covConfig)
self.covController.start()
def afterSummaryReport(self, event):
"""Only called if active so stop coverage and produce reports."""
if self.covController:
self.covController.finish()
self.covController.summary(event.stream)
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