forked from anton/matekasse
115 lines
3.7 KiB
Python
115 lines
3.7 KiB
Python
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# Licensed under the Apache License: http://www.apache.org/licenses/LICENSE-2.0
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# For details: https://github.com/nedbat/coveragepy/blob/master/NOTICE.txt
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"""Source file annotation for coverage.py."""
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from __future__ import annotations
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import os
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import re
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from typing import Iterable, Optional, TYPE_CHECKING
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from coverage.files import flat_rootname
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from coverage.misc import ensure_dir, isolate_module
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from coverage.plugin import FileReporter
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from coverage.report_core import get_analysis_to_report
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from coverage.results import Analysis
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from coverage.types import TMorf
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if TYPE_CHECKING:
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from coverage import Coverage
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os = isolate_module(os)
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class AnnotateReporter:
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"""Generate annotated source files showing line coverage.
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This reporter creates annotated copies of the measured source files. Each
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.py file is copied as a .py,cover file, with a left-hand margin annotating
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each line::
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> def h(x):
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- if 0: #pragma: no cover
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- pass
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> if x == 1:
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! a = 1
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> else:
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> a = 2
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> h(2)
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Executed lines use ">", lines not executed use "!", lines excluded from
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consideration use "-".
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"""
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def __init__(self, coverage: Coverage) -> None:
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self.coverage = coverage
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self.config = self.coverage.config
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self.directory: Optional[str] = None
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blank_re = re.compile(r"\s*(#|$)")
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else_re = re.compile(r"\s*else\s*:\s*(#|$)")
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def report(self, morfs: Optional[Iterable[TMorf]], directory: Optional[str] = None) -> None:
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"""Run the report.
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See `coverage.report()` for arguments.
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"""
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self.directory = directory
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self.coverage.get_data()
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for fr, analysis in get_analysis_to_report(self.coverage, morfs):
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self.annotate_file(fr, analysis)
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def annotate_file(self, fr: FileReporter, analysis: Analysis) -> None:
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"""Annotate a single file.
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`fr` is the FileReporter for the file to annotate.
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"""
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statements = sorted(analysis.statements)
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missing = sorted(analysis.missing)
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excluded = sorted(analysis.excluded)
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if self.directory:
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ensure_dir(self.directory)
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dest_file = os.path.join(self.directory, flat_rootname(fr.relative_filename()))
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if dest_file.endswith("_py"):
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dest_file = dest_file[:-3] + ".py"
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dest_file += ",cover"
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else:
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dest_file = fr.filename + ",cover"
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with open(dest_file, "w", encoding="utf-8") as dest:
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i = j = 0
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covered = True
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source = fr.source()
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for lineno, line in enumerate(source.splitlines(True), start=1):
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while i < len(statements) and statements[i] < lineno:
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i += 1
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while j < len(missing) and missing[j] < lineno:
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j += 1
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if i < len(statements) and statements[i] == lineno:
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covered = j >= len(missing) or missing[j] > lineno
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if self.blank_re.match(line):
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dest.write(" ")
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elif self.else_re.match(line):
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# Special logic for lines containing only "else:".
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if j >= len(missing):
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dest.write("> ")
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elif statements[i] == missing[j]:
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dest.write("! ")
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else:
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dest.write("> ")
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elif lineno in excluded:
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dest.write("- ")
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elif covered:
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dest.write("> ")
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else:
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dest.write("! ")
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dest.write(line)
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