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"""Results of coverage measurement."""
import os
from coverage.backward import set, sorted # pylint: disable-msg=W0622
from coverage.misc import format_lines, NoSource
from coverage.parser import CodeParser
class Analysis(object):
"""The results of analyzing a code unit."""
def __init__(self, cov, code_unit):
self.coverage = cov
self.code_unit = code_unit
self.filename = self.code_unit.filename
ext = os.path.splitext(self.filename)[1]
source = None
if ext == '.py':
if not os.path.exists(self.filename):
source = self.coverage.file_locator.get_zip_data(self.filename)
if not source:
raise NoSource("No source for code: %r" % self.filename)
self.parser = CodeParser(
text=source, filename=self.filename,
exclude=self.coverage.exclude_re
)
self.statements, self.excluded = self.parser.parse_source()
# Identify missing statements.
executed = self.coverage.data.executed_lines(self.filename)
exec1 = [l for l in self.parser.first_lines(executed) if l in self.statements]
exec1 = self.parser.first_lines(executed)
self.missing = sorted(set(self.statements) - set(exec1))
if self.coverage.data.has_arcs():
n_branches = self.total_branches()
mba = self.missing_branch_arcs()
n_missing_branches = sum([len(v) for v in mba.values()])
else:
n_branches = n_missing_branches = 0
self.numbers = Numbers(
n_files=1,
n_statements=len(self.statements),
n_excluded=len(self.excluded),
n_missing=len(self.missing),
n_branches=n_branches,
n_missing_branches=n_missing_branches,
)
def missing_formatted(self):
"""The missing line numbers, formatted nicely.
Returns a string like "1-2, 5-11, 13-14".
"""
return format_lines(self.statements, self.missing)
def has_arcs(self):
"""Were arcs measured in this result?"""
return self.coverage.data.has_arcs()
def arc_possibilities(self):
"""Returns a sorted list of the arcs in the code."""
return self.parser.arcs()
def arcs_executed(self):
"""Returns a sorted list of the arcs actually executed in the code."""
executed = self.coverage.data.executed_arcs(self.filename)
m2fl = self.parser.first_line
executed = [(m2fl(l1), m2fl(l2)) for (l1,l2) in executed]
return sorted(executed)
def arcs_missing(self):
"""Returns a sorted list of the arcs in the code not executed."""
possible = self.arc_possibilities()
executed = self.arcs_executed()
missing = [p for p in possible if p not in executed]
return sorted(missing)
def arcs_unpredicted(self):
"""Returns a sorted list of the executed arcs missing from the code."""
possible = self.arc_possibilities()
executed = self.arcs_executed()
# Exclude arcs here which connect a line to itself. They can occur
# in executed data in some cases. This is where they can cause
# trouble, and here is where it's the least burden to remove them.
unpredicted = [
e for e in executed
if e not in possible and e[0] != e[1]
]
return sorted(unpredicted)
def branch_lines(self):
"""Returns lines that have more than one exit."""
exit_counts = self.parser.exit_counts()
return [l1 for l1,count in exit_counts.items() if count > 1]
def total_branches(self):
exit_counts = self.parser.exit_counts()
return sum([count for count in exit_counts.values() if count > 1])
def missing_branch_arcs(self):
"""Return arcs that weren't executed from branch lines.
Returns {l1:[l2a,l2b,...], ...}
"""
missing = self.arcs_missing()
branch_lines = set(self.branch_lines())
mba = {}
for l1, l2 in missing:
if l1 in branch_lines:
if l1 not in mba:
mba[l1] = []
mba[l1].append(l2)
return mba
class Numbers(object):
"""The numerical results of measuring coverage.
This holds the basic statistics from `Analysis`, and is used to roll
up statistics across files.
"""
def __init__(self, n_files=0, n_statements=0, n_excluded=0, n_missing=0,
n_branches=0, n_missing_branches=0
):
self.n_files = n_files
self.n_statements = n_statements
self.n_excluded = n_excluded
self.n_missing = n_missing
self.n_branches = n_branches
self.n_missing_branches = n_missing_branches
def _get_n_executed(self):
"""Returns the number of executed statements."""
return self.n_statements - self.n_missing
n_executed = property(_get_n_executed)
def _get_n_executed_branches(self):
"""Returns the number of executed branches."""
return self.n_branches - self.n_missing_branches
n_executed_branches = property(_get_n_executed_branches)
def _get_pc_covered(self):
"""Returns a single percentage value for coverage."""
if self.n_statements > 0:
pc_cov = 100.0 * (self.n_executed + self.n_executed_branches) / (self.n_statements + self.n_branches)
else:
pc_cov = 100.0
return pc_cov
pc_covered = property(_get_pc_covered)
def __add__(self, other):
nums = Numbers()
nums.n_files = self.n_files + other.n_files
nums.n_statements = self.n_statements + other.n_statements
nums.n_excluded = self.n_excluded + other.n_excluded
nums.n_missing = self.n_missing + other.n_missing
nums.n_branches = self.n_branches + other.n_branches
nums.n_missing_branches = self.n_missing_branches + other.n_missing_branches
return nums
def __radd__(self, other):
# Implementing 0+Numbers allows us to sum() a list of Numbers.
if other == 0:
return self
raise NotImplemented
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