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78 lines
3.2 KiB
Python
78 lines
3.2 KiB
Python
"""Tests for Singularity/Apptainer preflight availability check.
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Verifies that a clear error is raised when neither apptainer nor
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singularity is installed, instead of a cryptic FileNotFoundError.
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See: https://github.com/NousResearch/hermes-agent/issues/1511
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"""
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import subprocess
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from unittest.mock import patch, MagicMock
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import pytest
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from tools.environments.singularity import (
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_find_singularity_executable,
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_ensure_singularity_available,
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)
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class TestFindSingularityExecutable:
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"""_find_singularity_executable resolution tests."""
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def test_prefers_apptainer(self):
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"""When both are available, apptainer should be preferred."""
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def which_both(name):
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return f"/usr/bin/{name}" if name in {"apptainer", "singularity"} else None
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with patch("shutil.which", side_effect=which_both):
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assert _find_singularity_executable() == "apptainer"
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def test_falls_back_to_singularity(self):
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"""When only singularity is available, use it."""
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def which_singularity_only(name):
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return "/usr/bin/singularity" if name == "singularity" else None
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with patch("shutil.which", side_effect=which_singularity_only):
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assert _find_singularity_executable() == "singularity"
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def test_raises_when_neither_found(self):
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"""Must raise RuntimeError with install instructions."""
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with patch("shutil.which", return_value=None):
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with pytest.raises(RuntimeError, match="Neither.*apptainer.*nor.*singularity"):
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_find_singularity_executable()
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class TestEnsureSingularityAvailable:
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"""_ensure_singularity_available preflight tests."""
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def test_returns_executable_on_success(self):
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"""Returns the executable name when version check passes."""
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fake_result = MagicMock(returncode=0, stderr="")
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with patch("shutil.which", side_effect=lambda n: "/usr/bin/apptainer" if n == "apptainer" else None), \
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patch("subprocess.run", return_value=fake_result):
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assert _ensure_singularity_available() == "apptainer"
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def test_raises_on_version_failure(self):
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"""Raises RuntimeError when version command fails."""
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fake_result = MagicMock(returncode=1, stderr="unknown flag")
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with patch("shutil.which", side_effect=lambda n: "/usr/bin/apptainer" if n == "apptainer" else None), \
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patch("subprocess.run", return_value=fake_result):
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with pytest.raises(RuntimeError, match="version.*failed"):
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_ensure_singularity_available()
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def test_raises_on_timeout(self):
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"""Raises RuntimeError when version command times out."""
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with patch("shutil.which", side_effect=lambda n: "/usr/bin/apptainer" if n == "apptainer" else None), \
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patch("subprocess.run", side_effect=subprocess.TimeoutExpired("apptainer", 10)):
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with pytest.raises(RuntimeError, match="timed out"):
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_ensure_singularity_available()
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def test_raises_when_not_installed(self):
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"""Raises RuntimeError when neither executable exists."""
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with patch("shutil.which", return_value=None):
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with pytest.raises(RuntimeError, match="Neither.*apptainer.*nor.*singularity"):
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_ensure_singularity_available()
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