Re: [PULL 3/5] qemu-iotests: 300: Add test case for modifying persistence of bitmap

[Kevin Wolf <kwolf@redhat.com>]

Am 15.02.2021 um 17:46 hat Eric Blake geschrieben:
> On 2/15/21 6:31 AM, Kevin Wolf wrote:
> > Am 13.02.2021 um 00:21 hat Eric Blake geschrieben:
> >> From: Peter Krempa <pkrempa@redhat.com>
> >>
> >> Verify that the modification of the bitmap persistence over migration
> >> which is controlled via BitmapMigrationBitmapAliasTransform works
> >> properly.
> >>
> >> Based on TestCrossAliasMigration
> >>
> >> Signed-off-by: Peter Krempa <pkrempa@redhat.com>
> >> Message-Id: <d9c8e9827e9b6001b2dd1b92e64aab858e6d2a86.1613150869.git.pkrempa@redhat.com>
> >> Reviewed-by: Eric Blake <eblake@redhat.com>
> >> [eblake: Adjust test for explicit read_zeroes=False]
> >> Signed-off-by: Eric Blake <eblake@redhat.com>
> > 
> > This breaks 297:
> > 
> > --- /home/kwolf/source/qemu/tests/qemu-iotests/297.out
> > +++ 297.out.bad
> > @@ -1,2 +1,8 @@
> >  === pylint ===
> > +************* Module 300
> > +300:605:0: C0301: Line too long (80/79) (line-too-long)
> > +300:677:0: C0301: Line too long (98/79) (line-too-long)
> 
> These two are easy fixes (add line breaks for shorter lines), but this:
> 
> >  === mypy ===
> > +300:646: error: Dict entry 2 has incompatible type "str": "Dict[str, bool]"; expected "str": "str"
> > +Found 1 error in 1 file (checked 1 source file)
> 
> is beyond my skill.  The typing at line 33:
> 
> BlockBitmapMapping = List[Dict[str, Union[str, List[Dict[str, str]]]]]
> 
> is insufficient to allow our new 'transform' member in the new
> transform_mapping() -> Block BitmapMapping near line 677:
> 
>                 'bitmaps': [
>                     {
>                         'name': 'bmap-a',
>                         'alias': 'bmap-a',
>                         'transform':
>                             {
>                                 'persistent': True
>                             }
>                     },
> 
> but I'm not sure how to tell python the right type it should be.  John?

To be honest, this looks sufficiently like JSON that I would just go for
List[Dict[str, Any]] (as long as recursive types don't work), but if you
really want to have an explicit type, I think you'd have to replace the
rightmost str with Union[str, Dict[str, bool]] to allow both.

Kevin