tests versuch 2

venv/lib/python3.11/site-packages/coverage/python.py

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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
+
+"""Python source expertise for coverage.py"""
+
+from __future__ import annotations
+
+import os.path
+import types
+import zipimport
+
+from typing import Dict, Iterable, Optional, Set, TYPE_CHECKING
+
+from coverage import env
+from coverage.exceptions import CoverageException, NoSource
+from coverage.files import canonical_filename, relative_filename, zip_location
+from coverage.misc import expensive, isolate_module, join_regex
+from coverage.parser import PythonParser
+from coverage.phystokens import source_token_lines, source_encoding
+from coverage.plugin import FileReporter
+from coverage.types import TArc, TLineNo, TMorf, TSourceTokenLines
+
+if TYPE_CHECKING:
+    from coverage import Coverage
+
+os = isolate_module(os)
+
+
+def read_python_source(filename: str) -> bytes:
+    """Read the Python source text from `filename`.
+
+    Returns bytes.
+
+    """
+    with open(filename, "rb") as f:
+        source = f.read()
+
+    return source.replace(b"\r\n", b"\n").replace(b"\r", b"\n")
+
+
+def get_python_source(filename: str) -> str:
+    """Return the source code, as unicode."""
+    base, ext = os.path.splitext(filename)
+    if ext == ".py" and env.WINDOWS:
+        exts = [".py", ".pyw"]
+    else:
+        exts = [ext]
+
+    source_bytes: Optional[bytes]
+    for ext in exts:
+        try_filename = base + ext
+        if os.path.exists(try_filename):
+            # A regular text file: open it.
+            source_bytes = read_python_source(try_filename)
+            break
+
+        # Maybe it's in a zip file?
+        source_bytes = get_zip_bytes(try_filename)
+        if source_bytes is not None:
+            break
+    else:
+        # Couldn't find source.
+        raise NoSource(f"No source for code: '{filename}'.")
+
+    # Replace \f because of http://bugs.python.org/issue19035
+    source_bytes = source_bytes.replace(b"\f", b" ")
+    source = source_bytes.decode(source_encoding(source_bytes), "replace")
+
+    # Python code should always end with a line with a newline.
+    if source and source[-1] != "\n":
+        source += "\n"
+
+    return source
+
+
+def get_zip_bytes(filename: str) -> Optional[bytes]:
+    """Get data from `filename` if it is a zip file path.
+
+    Returns the bytestring data read from the zip file, or None if no zip file
+    could be found or `filename` isn't in it.  The data returned will be
+    an empty string if the file is empty.
+
+    """
+    zipfile_inner = zip_location(filename)
+    if zipfile_inner is not None:
+        zipfile, inner = zipfile_inner
+        try:
+            zi = zipimport.zipimporter(zipfile)
+        except zipimport.ZipImportError:
+            return None
+        try:
+            data = zi.get_data(inner)
+        except OSError:
+            return None
+        return data
+    return None
+
+
+def source_for_file(filename: str) -> str:
+    """Return the source filename for `filename`.
+
+    Given a file name being traced, return the best guess as to the source
+    file to attribute it to.
+
+    """
+    if filename.endswith(".py"):
+        # .py files are themselves source files.
+        return filename
+
+    elif filename.endswith((".pyc", ".pyo")):
+        # Bytecode files probably have source files near them.
+        py_filename = filename[:-1]
+        if os.path.exists(py_filename):
+            # Found a .py file, use that.
+            return py_filename
+        if env.WINDOWS:
+            # On Windows, it could be a .pyw file.
+            pyw_filename = py_filename + "w"
+            if os.path.exists(pyw_filename):
+                return pyw_filename
+        # Didn't find source, but it's probably the .py file we want.
+        return py_filename
+
+    # No idea, just use the file name as-is.
+    return filename
+
+
+def source_for_morf(morf: TMorf) -> str:
+    """Get the source filename for the module-or-file `morf`."""
+    if hasattr(morf, "__file__") and morf.__file__:
+        filename = morf.__file__
+    elif isinstance(morf, types.ModuleType):
+        # A module should have had .__file__, otherwise we can't use it.
+        # This could be a PEP-420 namespace package.
+        raise CoverageException(f"Module {morf} has no file")
+    else:
+        filename = morf
+
+    filename = source_for_file(filename)
+    return filename
+
+
+class PythonFileReporter(FileReporter):
+    """Report support for a Python file."""
+
+    def __init__(self, morf: TMorf, coverage: Optional[Coverage] = None) -> None:
+        self.coverage = coverage
+
+        filename = source_for_morf(morf)
+
+        fname = filename
+        canonicalize = True
+        if self.coverage is not None:
+            if self.coverage.config.relative_files:
+                canonicalize = False
+        if canonicalize:
+            fname = canonical_filename(filename)
+        super().__init__(fname)
+
+        if hasattr(morf, "__name__"):
+            name = morf.__name__.replace(".", os.sep)
+            if os.path.basename(filename).startswith("__init__."):
+                name += os.sep + "__init__"
+            name += ".py"
+        else:
+            name = relative_filename(filename)
+        self.relname = name
+
+        self._source: Optional[str] = None
+        self._parser: Optional[PythonParser] = None
+        self._excluded = None
+
+    def __repr__(self) -> str:
+        return f"<PythonFileReporter {self.filename!r}>"
+
+    def relative_filename(self) -> str:
+        return self.relname
+
+    @property
+    def parser(self) -> PythonParser:
+        """Lazily create a :class:`PythonParser`."""
+        assert self.coverage is not None
+        if self._parser is None:
+            self._parser = PythonParser(
+                filename=self.filename,
+                exclude=self.coverage._exclude_regex("exclude"),
+            )
+            self._parser.parse_source()
+        return self._parser
+
+    def lines(self) -> Set[TLineNo]:
+        """Return the line numbers of statements in the file."""
+        return self.parser.statements
+
+    def excluded_lines(self) -> Set[TLineNo]:
+        """Return the line numbers of statements in the file."""
+        return self.parser.excluded
+
+    def translate_lines(self, lines: Iterable[TLineNo]) -> Set[TLineNo]:
+        return self.parser.translate_lines(lines)
+
+    def translate_arcs(self, arcs: Iterable[TArc]) -> Set[TArc]:
+        return self.parser.translate_arcs(arcs)
+
+    @expensive
+    def no_branch_lines(self) -> Set[TLineNo]:
+        assert self.coverage is not None
+        no_branch = self.parser.lines_matching(
+            join_regex(self.coverage.config.partial_list),
+            join_regex(self.coverage.config.partial_always_list),
+        )
+        return no_branch
+
+    @expensive
+    def arcs(self) -> Set[TArc]:
+        return self.parser.arcs()
+
+    @expensive
+    def exit_counts(self) -> Dict[TLineNo, int]:
+        return self.parser.exit_counts()
+
+    def missing_arc_description(
+        self,
+        start: TLineNo,
+        end: TLineNo,
+        executed_arcs: Optional[Iterable[TArc]] = None,
+    ) -> str:
+        return self.parser.missing_arc_description(start, end, executed_arcs)
+
+    def source(self) -> str:
+        if self._source is None:
+            self._source = get_python_source(self.filename)
+        return self._source
+
+    def should_be_python(self) -> bool:
+        """Does it seem like this file should contain Python?
+
+        This is used to decide if a file reported as part of the execution of
+        a program was really likely to have contained Python in the first
+        place.
+
+        """
+        # Get the file extension.
+        _, ext = os.path.splitext(self.filename)
+
+        # Anything named *.py* should be Python.
+        if ext.startswith(".py"):
+            return True
+        # A file with no extension should be Python.
+        if not ext:
+            return True
+        # Everything else is probably not Python.
+        return False
+
+    def source_token_lines(self) -> TSourceTokenLines:
+        return source_token_lines(self.source())