Zakaria
66 lines
2.5 KiB
Python
66 lines
2.5 KiB
Python
"""Harness: interactive TUI TTY passthrough.
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Uses ``script -qc`` on the host to allocate a PTY for the docker client,
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which then allocates a container-side PTY via ``-t``. The probe inside
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the container is ``tput cols``, which returns a real column count when
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stdout is a TTY and either prints ``80`` (the terminfo fallback) or
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nothing when it is not.
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These tests MUST pass on the current tini-based image AND continue to
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pass after the Phase 2 s6 migration. Any drift is a regression.
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"""
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from __future__ import annotations
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import re
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import shlex
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import shutil
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import subprocess
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import pytest
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pytestmark = pytest.mark.skipif(
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shutil.which("script") is None,
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reason="`script` command not available on this host",
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)
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def test_tty_passthrough_to_container(built_image: str) -> None:
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"""``docker run -t`` must deliver a real TTY to the container process."""
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# Emit the probe result behind a unique marker. The container's s6 boot
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# output (cont-init diagnostics, skills-sync summaries like
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# "Done: 90 new, 0 updated, ...", the preinit "uid=0 ... egid=0" line)
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# is written to the SAME PTY stream before this runs, so we must NOT
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# scan the whole stream for "the first number" — that picks up a stray
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# 0 from the boot log and flips the assertion (assert 0 > 0) whenever
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# boot output shifts (e.g. a new bundled dep changes the skills-sync
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# counts). Parse only the value tagged with our marker.
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marker = "HERMES_TTY_COLS"
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probe = (
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f'if [ -t 1 ]; then echo "{marker}=$(tput cols)"; else echo "{marker}=NO_TTY"; fi'
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)
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cmd = (
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f"docker run --rm -t -e COLUMNS=123 {built_image} "
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f"sh -c {shlex.quote(probe)}"
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)
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r = subprocess.run(
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["script", "-qc", cmd, "/dev/null"],
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capture_output=True, text=True, timeout=120,
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)
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output = r.stdout
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matches = re.findall(rf"{marker}=(\S+)", output)
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assert matches, f"No {marker} marker in output: {output!r}"
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value = matches[-1].strip()
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assert value != "NO_TTY", f"TTY passthrough failed: {output!r}"
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assert value.isdigit(), f"Non-numeric column width {value!r} in: {output!r}"
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assert int(value) > 0
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def test_tui_flag_recognized(built_image: str) -> None:
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"""``docker run -it <image> --help`` should run without crashing."""
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cmd = f"docker run --rm -t {built_image} --help"
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r = subprocess.run(
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["script", "-qc", cmd, "/dev/null"],
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capture_output=True, text=True, timeout=60,
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)
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assert r.returncode == 0
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