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# Licensed under the Apache License: http://www.apache.org/licenses/LICENSE-2.0
# For details: https://github.com/nedbat/coveragepy/blob/master/NOTICE.txt
"""A file tracer plugin for test_plugins.py to import."""
from __future__ import annotations
import os.path
from types import FrameType
from typing import Any, Optional, Set, Tuple, Union
from coverage import CoveragePlugin, FileReporter, FileTracer
from coverage.plugin_support import Plugins
from coverage.types import TLineNo
class Plugin(CoveragePlugin):
"""A file tracer plugin to import, so that it isn't in the test's current directory."""
def file_tracer(self, filename: str) -> Optional[FileTracer]:
"""Trace only files named xyz.py"""
if "xyz.py" in filename:
return MyFileTracer(filename)
return None
def file_reporter(self, filename: str) -> Union[FileReporter, str]:
return MyFileReporter(filename)
class MyFileTracer(FileTracer):
"""A FileTracer emulating a simple static plugin."""
def __init__(self, filename: str) -> None:
"""Claim that */*xyz.py was actually sourced from /src/*ABC.zz"""
self._filename = filename
self._source_filename = os.path.join(
"/src",
os.path.basename(filename.replace("xyz.py", "ABC.zz"))
)
def source_filename(self) -> str:
return self._source_filename
def line_number_range(self, frame: FrameType) -> Tuple[TLineNo, TLineNo]:
"""Map the line number X to X05,X06,X07."""
lineno = frame.f_lineno
return lineno*100+5, lineno*100+7
class MyFileReporter(FileReporter):
"""Dead-simple FileReporter."""
def lines(self) -> Set[TLineNo]:
return {105, 106, 107, 205, 206, 207}
def coverage_init(
reg: Plugins,
options: Any, # pylint: disable=unused-argument
) -> None:
"""Called by coverage to initialize the plugins here."""
reg.add_file_tracer(Plugin())
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