Class ExceptionChainRepr

src/_pytest/_code/code.py:1296–1320

A chain of exceptions, separated by descriptions (e.g. "The above exception was the direct cause of the following exception").

@dataclasses.dataclass(eq=False)
class ExceptionChainRepr(ExceptionRepr):
    """A chain of exceptions, separated by descriptions (e.g. "The above
    exception was the direct cause of the following exception")."""

    chain: Sequence[tuple[ReprTraceback, ReprFileLocation | None, str | None]]

    def __init__(
        self,
        chain: Sequence[tuple[ReprTraceback, ReprFileLocation | None, str | None]],
    ) -> None:
        # reprcrash and reprtraceback of the outermost (the newest) exception
        # in the chain.
        super().__init__(
            reprtraceback=chain[-1][0],
            reprcrash=chain[-1][1],
        )
        self.chain = chain

    def toterminal(self, tw: TerminalWriter) -> None:
        for reprtraceback, reprcrash, description in self.chain:
            reprtraceback.toterminal(tw)
            if description is not None:
                tw.line("")
                tw.line(description, yellow=True)
        super().toterminal(tw)


@dataclasses.dataclass(eq=False)