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test: use errno.ENOENT for command not found assertion #1498

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test: use errno.ENOENT for command not found assertion #1498

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test: use errno.ENOENT for command not found assertion
mingo1996 Oct 19, 2025
df6b41a
Merge branch 'modelcontextprotocol:main' into main
mingo1996 Oct 19, 2025
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12 changes: 4 additions & 8 deletions tests/client/test_stdio.py
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Original file line number Diff line number Diff line change
@@ -1,3 +1,4 @@
import errno
import os
import shutil
import sys
Expand Down Expand Up @@ -90,17 +91,12 @@ async def test_stdio_client_nonexistent_command():
)

# Should raise an error when trying to start the process
with pytest.raises(Exception) as exc_info:
with pytest.raises(OSError) as exc_info:
async with stdio_client(server_params) as (_, _):
pass

# The error should indicate the command was not found
error_message = str(exc_info.value)
assert (
"nonexistent" in error_message
or "not found" in error_message.lower()
or "cannot find the file" in error_message.lower() # Windows error message
)
# The error should indicate the command was not found (ENOENT: No such file or directory)
assert exc_info.value.errno == errno.ENOENT


@pytest.mark.anyio
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