def pytest_runtest_protocol(item: Item) -> Generator[None, object, object]:
    """Setup the pytest_assertrepr_compare and pytest_assertion_pass hooks.

    The rewrite module will use util._reprcompare if it exists to use custom
    reporting via the pytest_assertrepr_compare hook.  This sets up this custom
    comparison for the test.
    """
    ihook = item.ihook

    def callbinrepr(op, left: object, right: object) -> str | None:
        """Call the pytest_assertrepr_compare hook and prepare the result.

        This uses the first result from the hook and then ensures the
        following:
        * Overly verbose explanations are truncated unless configured otherwise
          (eg. if running in verbose mode).
        * Embedded newlines are escaped to help util.format_explanation()
          later.
        * If the rewrite mode is used embedded %-characters are replaced
          to protect later % formatting.

        The result can be formatted by util.format_explanation() for
        pretty printing.
        """
        hook_result = ihook.pytest_assertrepr_compare(
            config=item.config, op=op, left=left, right=right
        )
        for new_expl in hook_result:
            if new_expl:
                new_expl = truncate.truncate_if_required(new_expl, item)
                new_expl = [line.replace("\n", "\\n") for line in new_expl]
                res = "\n~".join(new_expl)
                if item.config.getvalue("assertmode") == "rewrite":
                    res = res.replace("%", "%%")
                return res
        return None

    saved_assert_hooks = util._reprcompare, util._assertion_pass
    util._reprcompare = callbinrepr
    util._config = item.config

    if ihook.pytest_assertion_pass.get_hookimpls():

        def call_assertion_pass_hook(lineno: int, orig: str, expl: str) -> None:
            ihook.pytest_assertion_pass(item=item, lineno=lineno, orig=orig, expl=expl)

        util._assertion_pass = call_assertion_pass_hook

    try:
        return (yield)
    finally:
        util._reprcompare, util._assertion_pass = saved_assert_hooks
        util._config = None
Setup the pytest_assertrepr_compare and pytest_assertion_pass hooks.

    The rewrite module will use util._reprcompare if it exists to use custom
    reporting via the pytest_assertrepr_compare hook.  This sets up this custom
    comparison for the test.
    
src/_pytest/assertion/__init__.py