34 lines
1.3 KiB
Python
34 lines
1.3 KiB
Python
"""Contained child output: CI keeps every line, interactive runs never hide a failure."""
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import io
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import subprocess
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import sys
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import pytest
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from pm.progress import run_contained, verbose_output
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def test_ci_streams_and_an_explicit_choice_overrides_it():
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assert verbose_output({"CI": "true"}) and verbose_output({"GITHUB_ACTIONS": "true"})
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assert not verbose_output({}) and not verbose_output({"CI": "0"})
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assert not verbose_output({"CI": "1", "HERMES_VERBOSE": "0"})
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assert verbose_output({"HERMES_VERBOSE": "1"})
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@pytest.mark.parametrize("fails", [False, True])
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def test_contained_run_shows_output_only_when_the_child_fails(monkeypatch, fails):
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monkeypatch.setenv("HERMES_VERBOSE", "0")
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stream = io.StringIO()
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script = f"import sys\nfor i in range(200): print('noise', i)\nprint('the real error')\nsys.exit({fails:d})"
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command = [sys.executable, "-c", script]
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if fails:
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with pytest.raises(subprocess.CalledProcessError):
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run_contained(command, "Installing things", stream=stream)
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else:
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run_contained(command, "Installing things", stream=stream)
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text = stream.getvalue()
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assert "→ Installing things" in text
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assert ("the real error" in text) is fails
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assert "noise 0" not in text, "the failure tail stays bounded"
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