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test: capture stdout/stderr in Bash.test helper #209

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test: capture stdout/stderr in Bash.test helper #209

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13 changes: 9 additions & 4 deletions tests/test_shtab.py
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Original file line number Diff line number Diff line change
Expand Up @@ -21,14 +21,19 @@ def __init__(self, init_script=""):
def test(self, cmd="1", failure_message=""):
"""Equivalent to `bash -c '{init}; [[ {cmd} ]]'`."""
init = self.init + "\n" if self.init else ""
proc = subprocess.Popen(["bash", "-o", "pipefail", "-euc", f"{init}[[ {cmd} ]]"])
proc = subprocess.Popen(
["bash", "-o", "pipefail", "-euc", f"{init}[[ {cmd} ]]"],
stdout=subprocess.PIPE,
stderr=subprocess.PIPE,
encoding="utf-8",
)
stdout, stderr = proc.communicate()
assert (0 == proc.wait() and not stdout and not stderr), f"""\
assert (0 == proc.wait() and stdout == "" and stderr == ""), f"""\
{failure_message}
{cmd}
=== stdout ===
{stdout or ""}=== stderr ===
{stderr or ""}"""
{stdout}=== stderr ===
{stderr}"""

def compgen(self, compgen_cmd, word, expected_completions, failure_message=""):
self.test(
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