[Avocado-devel] Unexpected conversion of yaml content to ListOfNodeObjects

[Cleber Rosa]

On 02/13/2017 03:33 AM, Vincent Matossian wrote:
> 
> I'm seeing an odd behavior on v0.45, when trying to load a yaml file in
> an instrumented test the yaml content gets converted to a list of
> MuxTreeNodes rather than a dictionary.
> 
> here's a simple example
> 
> mytest.py
> 
> #!/bin/env python
> import yaml
> from avocado import Test
> 
> class MyTest(Test):
> 
>     def test(self):
>         with open("some.yaml") as f:
>             d = yaml.load(f)
>         print(type(d))
>         print(d)
> 
> 
> some.yaml:
> 
> key1:
>   subkey: subval
> key2:
>   subkey: subval
> 
> An empty.yaml file
> 
> Run: avocado run --show-job-log mytest.py --mux-yaml empty.yaml
> 
> Relevant output: 
> 
> START 1-d.py:MyTest.test
> <class 'avocado.plugins.yaml_to_mux.ListOfNodeObjects'>
> [MuxTreeNode(name='key1'), MuxTreeNode(name='key2')]
> PASS 1-d.py:MyTest.test 
> 
> If I drop the mux-yaml option then the output looks like what I'd expect
> 
> START 1-d.py:MyTest.test
> <type 'dict'>
> {'key2': {'subkey': 'subval'}, 'key1': {'subkey': 'subval'}}
> PASS 1-d.py:MyTest.test
> 
> 

On my machine:

$ avocado --show test run mytest.py | grep -e type -e key1
<type 'dict'>
{'key2': {'subkey': 'subval'}, 'key1': {'subkey': 'subval'}}

$ avocado --show test run mytest.py --mux-yaml empty.yaml | grep -e type
-e key1
<type 'dict'>
{'key2': {'subkey': 'subval'}, 'key1': {'subkey': 'subval'}}

That is, I can not reproduce it.  I'm running avocado from latest master
(337b333e1b58f18f876c993121454f2f6cb599db).  Can you share your own version?

> --mux-yaml seems to intercept all yaml conversions, this is not
> desirable in my case as I lose the ability to use yaml in my test, my
> apologies for not doing much research on whether this is a known, please
> let me know if I missed the obvious or how I can work around it
> 

If this turns out to be reproducible, it may point at some serious
problems with Avocado: the runner influencing the "yaml" module loaded
in the test.

I really want to check if this is a current bug.

> Thanks
> 

Thank you for reporting it.

> Vincent
> 

-- 
Cleber Rosa
[ Sr Software Engineer - Virtualization Team - Red Hat ]
[ Avocado Test Framework - avocado-framework.github.io ]

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