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import os
from typing import ContextManager, TextIO, cast
from ..utils import DummyContext
from .base import PipeInput
from .vt100 import Vt100Input
__all__ = [
"PosixPipeInput",
]
class PosixPipeInput(Vt100Input, PipeInput):
"""
Input that is send through a pipe.
This is useful if we want to send the input programmatically into the
application. Mostly useful for unit testing.
Usage::
input = PosixPipeInput()
input.send_text('inputdata')
"""
_id = 0
def __init__(self, text: str = "") -> None:
self._r, self._w = os.pipe()
class Stdin:
encoding = "utf-8"
def isatty(stdin) -> bool:
return True
def fileno(stdin) -> int:
return self._r
super().__init__(cast(TextIO, Stdin()))
self.send_text(text)
# Identifier for every PipeInput for the hash.
self.__class__._id += 1
self._id = self.__class__._id
def send_bytes(self, data: bytes) -> None:
os.write(self._w, data)
def send_text(self, data: str) -> None:
"Send text to the input."
os.write(self._w, data.encode("utf-8"))
def raw_mode(self) -> ContextManager[None]:
return DummyContext()
def cooked_mode(self) -> ContextManager[None]:
return DummyContext()
def close(self) -> None:
"Close pipe fds."
os.close(self._r)
os.close(self._w)
# We should assign `None` to 'self._r` and 'self._w',
# The event loop still needs to know the the fileno for this input in order
# to properly remove it from the selectors.
def typeahead_hash(self) -> str:
"""
This needs to be unique for every `PipeInput`.
"""
return f"pipe-input-{self._id}"
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