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test: Remove nondeterminism in systemlist interrupt tests

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The systemlist test currently calls the `echo` command which can potentially
complete before being interrupted, causing random test failures.

Use `yes | xargs` instead. A `yes` invocation that is not piped through `xargs`
can produce a huge amount of lines in a very short time, leading memory
starvation when the result is being converted into a list. `xargs` ensures only
one line of output will be produced while allowing interrupt to be tested.
This commit is contained in:
Thiago de Arruda 2015-02-06 15:11:04 -03:00
parent 281cd3856c
commit 11fa4f42fd
1 changed files with 2 additions and 2 deletions
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4
test/functional/shell/viml_system_spec.lua
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@ -248,7 +248,7 @@ describe('systemlist()', function()
end)
it('`yes` and is directly interrupted with CTRL-C', function()
feed(':call systemlist("echo")<cr><c-c>')
feed(':call systemlist("yes | xargs")<cr><c-c>')
screen:expect([[
^ |
~ |
@ -268,7 +268,7 @@ describe('systemlist()', function()
end)
it('`yes` and is a little bit later interrupted with CTRL-C', function()
feed(':call systemlist("echo")<cr>')
feed(':call systemlist("yes | xargs")<cr>')
feed('<c-c>')
screen:expect([[
^ |