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import re
import pytest
from xonsh.procs.specs import cmds_to_specs
from xonsh.tracer import tracermain
def test_tracer_help(capsys, xsh_with_aliases):
"""verify can invoke it, and usage knows about all the options"""
spec = cmds_to_specs([("trace", "-h")], captured="stdout")[0]
with pytest.raises(SystemExit):
tracermain(["-h"], spec=spec)
capout = capsys.readouterr().out
pat = re.compile(r"^usage:\s*trace[^\n]*{([\w,-]+)}", re.MULTILINE)
m = pat.match(capout)
assert m[1]
verbs = {v.strip().lower() for v in m[1].split(",")}
assert verbs == {"rm", "start", "add", "on", "off", "del", "color", "stop", "ls"}
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