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"""Source file annotation for Coverage."""
import os, re
from coverage.report import Reporter
class AnnotateReporter(Reporter):
"""Generate annotated source files showing line coverage.
This reporter creates annotated copies of the measured source files. Each
.py file is copied as a .py,cover file, with a left-hand margin annotating
each line::
> def h(x):
- if 0: #pragma: no cover
- pass
> if x == 1:
! a = 1
> else:
> a = 2
> h(2)
Executed lines use '>', lines not executed use '!', lines excluded from
consideration use '-'.
"""
def __init__(self, coverage, config):
super(AnnotateReporter, self).__init__(coverage, config)
self.directory = None
blank_re = re.compile(r"\s*(#|$)")
else_re = re.compile(r"\s*else\s*:\s*(#|$)")
def report(self, morfs, directory=None):
"""Run the report.
See `coverage.report()` for arguments.
"""
self.report_files(self.annotate_file, morfs, directory)
def annotate_file(self, cu, analysis):
"""Annotate a single file.
`cu` is the CodeUnit for the file to annotate.
"""
if not cu.relative:
return
filename = cu.filename
source = cu.source_file()
if self.directory:
dest_file = os.path.join(self.directory, cu.flat_rootname())
dest_file += ".py,cover"
else:
dest_file = filename + ",cover"
dest = open(dest_file, 'w')
statements = analysis.statements
missing = analysis.missing
excluded = analysis.excluded
lineno = 0
i = 0
j = 0
covered = True
while True:
line = source.readline()
if line == '':
break
lineno += 1
while i < len(statements) and statements[i] < lineno:
i += 1
while j < len(missing) and missing[j] < lineno:
j += 1
if i < len(statements) and statements[i] == lineno:
covered = j >= len(missing) or missing[j] > lineno
if self.blank_re.match(line):
dest.write(' ')
elif self.else_re.match(line):
# Special logic for lines containing only 'else:'.
if i >= len(statements) and j >= len(missing):
dest.write('! ')
elif i >= len(statements) or j >= len(missing):
dest.write('> ')
elif statements[i] == missing[j]:
dest.write('! ')
else:
dest.write('> ')
elif lineno in excluded:
dest.write('- ')
elif covered:
dest.write('> ')
else:
dest.write('! ')
dest.write(line)
source.close()
dest.close()