Add unit tests for calculator

calculator/lib/python3.12/site-packages/coverage/env.py

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+# Licensed under the Apache License: http://www.apache.org/licenses/LICENSE-2.0
+# For details: https://github.com/coveragepy/coveragepy/blob/main/NOTICE.txt
+
+"""Determine facts about the environment."""
+
+from __future__ import annotations
+
+import os
+import platform
+import sys
+from collections.abc import Iterable
+from typing import Any, Final
+
+# debug_info() at the bottom wants to show all the globals, but not imports.
+# Grab the global names here to know which names to not show. Nothing defined
+# above this line will be in the output.
+_UNINTERESTING_GLOBALS = list(globals())
+# These names also shouldn't be shown.
+_UNINTERESTING_GLOBALS += ["PYBEHAVIOR", "debug_info"]
+
+# Operating systems.
+WINDOWS = sys.platform == "win32"
+LINUX = sys.platform.startswith("linux")
+MACOS = sys.platform == "darwin"
+
+# Python implementations.
+CPYTHON = (platform.python_implementation() == "CPython")  # fmt: skip
+PYPY = (platform.python_implementation() == "PyPy")  # fmt: skip
+
+# Python versions. We amend version_info with one more value, a zero if an
+# official version, or 1 if built from source beyond an official version.
+# Only use sys.version_info directly where tools like mypy need it to understand
+# version-specfic code, otherwise use PYVERSION.
+PYVERSION = sys.version_info + (int(platform.python_version()[-1] == "+"),)
+
+if PYPY:
+    # Minimum now is 7.3.16
+    PYPYVERSION = tuple(sys.pypy_version_info)  # type: ignore[attr-defined]
+else:
+    PYPYVERSION = (0,)
+
+# Do we have a GIL?
+GIL = getattr(sys, "_is_gil_enabled", lambda: True)()
+
+# Do we ship compiled coveragepy wheels for this version?
+SHIPPING_WHEELS = CPYTHON and PYVERSION[:2] <= (3, 14)
+
+# Should we default to sys.monitoring?
+SYSMON_DEFAULT = CPYTHON and PYVERSION >= (3, 14)
+
+
+# Python behavior.
+class PYBEHAVIOR:
+    """Flags indicating this Python's behavior."""
+
+    # When leaving a with-block, do we visit the with-line exactly,
+    # or the context managers in inner-out order?
+    #
+    # mwith.py:
+    #    with (
+    #        open("/tmp/one", "w") as f2,
+    #        open("/tmp/two", "w") as f3,
+    #        open("/tmp/three", "w") as f4,
+    #    ):
+    #        print("hello 6")
+    #
+    # % python3.11 -m trace -t mwith.py | grep mwith
+    #  --- modulename: mwith, funcname: <module>
+    # mwith.py(2):     open("/tmp/one", "w") as f2,
+    # mwith.py(1): with (
+    # mwith.py(2):     open("/tmp/one", "w") as f2,
+    # mwith.py(3):     open("/tmp/two", "w") as f3,
+    # mwith.py(1): with (
+    # mwith.py(3):     open("/tmp/two", "w") as f3,
+    # mwith.py(4):     open("/tmp/three", "w") as f4,
+    # mwith.py(1): with (
+    # mwith.py(4):     open("/tmp/three", "w") as f4,
+    # mwith.py(6):     print("hello 6")
+    # mwith.py(1): with (
+    #
+    # % python3.12 -m trace -t mwith.py | grep mwith
+    #  --- modulename: mwith, funcname: <module>
+    # mwith.py(2):      open("/tmp/one", "w") as f2,
+    # mwith.py(3):      open("/tmp/two", "w") as f3,
+    # mwith.py(4):      open("/tmp/three", "w") as f4,
+    # mwith.py(6):      print("hello 6")
+    # mwith.py(4):      open("/tmp/three", "w") as f4,
+    # mwith.py(3):      open("/tmp/two", "w") as f3,
+    # mwith.py(2):      open("/tmp/one", "w") as f2,
+
+    exit_with_through_ctxmgr = (PYVERSION >= (3, 12, 6))  # fmt: skip
+
+    # f-strings are parsed as code, pep 701
+    fstring_syntax = (PYVERSION >= (3, 12))  # fmt: skip
+
+    # PEP669 Low Impact Monitoring: https://peps.python.org/pep-0669/
+    pep669: Final[bool] = bool(getattr(sys, "monitoring", None))
+
+    # Where does frame.f_lasti point when yielding from a generator?
+    # It used to point at the YIELD, in 3.13 it points at the RESUME,
+    # then it went back to the YIELD.
+    # https://github.com/python/cpython/issues/113728
+    lasti_is_yield = (PYVERSION[:2] != (3, 13))  # fmt: skip
+
+    # PEP649 and PEP749: Deferred annotations
+    deferred_annotations = (PYVERSION >= (3, 14))  # fmt: skip
+
+    # Does sys.monitoring support BRANCH_RIGHT and BRANCH_LEFT?  The names
+    # were added in early 3.14 alphas, but didn't work entirely correctly until
+    # after 3.14.0a5.
+    branch_right_left = pep669 and (PYVERSION > (3, 14, 0, "alpha", 5, 0))
+
+
+# Coverage.py specifics, about testing scenarios. See tests/testenv.py also.
+
+# Are we coverage-measuring ourselves?
+METACOV = os.getenv("COVERAGE_COVERAGE") is not None
+
+# Are we running our test suite?
+# Even when running tests, you can use COVERAGE_TESTING=0 to disable the
+# test-specific behavior like AST checking.
+TESTING = os.getenv("COVERAGE_TESTING") == "True"
+
+
+def debug_info() -> Iterable[tuple[str, Any]]:
+    """Return a list of (name, value) pairs for printing debug information."""
+    info = [
+        (name, value)
+        for name, value in globals().items()
+        if not name.startswith("_") and name not in _UNINTERESTING_GLOBALS
+    ]
+    info += [
+        (name, value) for name, value in PYBEHAVIOR.__dict__.items() if not name.startswith("_")
+    ]
+    return sorted(info)