When I use Shell script to run PyTest, some ERROR jumped up.

[lucky33newman]

Hello,

When I use Shell script to run pytest. In the Shell script, the contents are:

#!/usr/bin/sh

cd /usr/pytest/
pytest -m "not dangerous"

It works well, but when I write the Shell script like this:

#!/usr/bin/sh

suffix="-m 'not dangerous'"

cd /usr/pytest/

pytest ${suffix}

I just get a ERROR message like this:

collected 0 items

========== no tests ran in 1.24s =================
ERROR: file or directory not found: dangerous'

I mean to run command like [pytest -m 'not dangerous']

Why it became like this?

I just can not understand.

Help!

[The-Compiler]

Please format code as code in the future, as your post is almost unreadable. I edited it to add code blocks.

This isn't a pytest issue, it's a shell issue. If you use variables in a shell script, they need to be quoted when using them, to avoid splitting arguments at spaces. In a case like this, it's cleanest use an array instead:

suffix=("-m" "not dangerous")
...
pytest "${suffix[@]}"

See Quotes - Greg's Wiki and Words... [Bash Hackers Wiki] for more explanation around it.

I'd also recommend using ShellCheck, as it points out things like this:

[Line 3:]
suffix="-m 'not dangerous'"
        ^-- [SC2089](https://www.shellcheck.net/wiki/SC2089) (warning): Quotes/backslashes will be treated literally. Rewrite using set/"$@" or functions.
 
[Line 5:]
cd /usr/pytest/
^-- [SC2164](https://www.shellcheck.net/wiki/SC2164) (warning): Use 'cd ... || exit' or 'cd ... || return' in case cd fails.

Did you mean: ([apply this](javascript:applyFixIndex([1])), apply [all SC2164](javascript:applyFixCode(2164)))
cd /usr/pytest/ || exit
 
[Line 7:]
pytest ${suffix}
       ^-- [SC2090](https://www.shellcheck.net/wiki/SC2090) (warning): Quotes/backslashes in this variable will not be respected.
       ^-- [SC2086](https://www.shellcheck.net/wiki/SC2086) (info): Double quote to prevent globbing and word splitting.

Did you mean: ([apply this](javascript:applyFixIndex([3])), apply [all SC2086](javascript:applyFixCode(2086)))
pytest "${suffix}"

[lucky33newman]

Sir, yes sir! Salute! Actually, I am 100 per cent new to python and shell. So it is normal to make low level mistakes. X)