add tests for ubuntu plucky

[jkotan]

It would be good to add tests for ubuntu 25.04

[jkotan]

Ubuntu plucky tests fails because of issue described at ess-dmsc/h5cpp#666
i.e. #001: ../../../src/H5Aint.c line 724 in H5A__write(): unable to convert between src and dst datatypes

from pninexus import h5cpp
import numpy

w1 = h5cpp.file.create("myteutf8.h5", h5cpp.file.AccessFlags.TRUNCATE)
rt = w1.root()

sdata = u"um"
data = u"\u03bcm"

# dtype = h5cpp.datatype.String.variable()                                      
# dtype.encoding = h5cpp.datatype.CharacterEncoding.ASCII                       
# at = rt.attributes.create("StringASCII", dtype)                               
# at.write(sdata)                                                               

dtype2 = h5cpp.datatype.String.variable()
dtype2.encoding = h5cpp.datatype.CharacterEncoding.UTF8
at = rt.attributes.create("StringUTF8", dtype2)
at.write(data)

i.e. after uncommenting lines related to String ASCII the above code works without the error.

[jkotan]

https://github.com/pni-libraries/python-pninexus/actions/runs/14661696725/job/41147375233