wrap GeneratorModel methods into BoundMethod; remove redundant test

[temyurchenko]

The LookupTest.test_generator_attributes contains outdated Python 2
code (doesn't run on Python 3). The test is superceded by
GeneratorModelTest.test_model.

A part of getting rid of non-Module roots, see #2536

Supersedes #2563.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 93.24%. Comparing base (eb88dfe) to head (b6de90b).
Report is 1 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #2584      +/-   ##
==========================================
+ Coverage   93.10%   93.24%   +0.13%     
==========================================
  Files          93       93              
  Lines       11065    11066       +1     
==========================================
+ Hits        10302    10318      +16     
+ Misses        763      748      -15     

Flag	Coverage Δ
linux	93.12% <100.00%> (+0.13%)	⬆️
pypy	93.24% <100.00%> (+0.13%)	⬆️
windows	93.22% <100.00%> (+0.13%)	⬆️

Flags with carried forward coverage won't be shown. Click here to find out more.

Files with missing lines	Coverage Δ
astroid/bases.py	88.91% <100.00%> (+0.62%)	⬆️
astroid/interpreter/objectmodel.py	96.28% <100.00%> (+2.47%)	⬆️
astroid/raw_building.py	94.88% <ø> (-0.04%)	⬇️

... and 1 file with indirect coverage changes

[temyurchenko]

A bit confused by the coverage report. Clearly, #L705 is covered by GeneratorModelTest.test_model. There is also AsyncGeneratorTest, which should cover the __init__ of the AsyncGenerator. Any ideas?

[temyurchenko]

A bit confused by the coverage report. Clearly, #L705 is covered by GeneratorModelTest.test_model. There is also AsyncGeneratorTest, which should cover the __init__ of the AsyncGenerator. Any ideas?

AsyncGeneratorTest wasn't inheriting from unittest.TestCase and thus it was skipped… Furthermore, the AsyncGeneratorModel was never used. That uncovered a bunch of issues, hopefully I've fixed them.

[Pierre-Sassoulas]

Great cleanup thank you. The test missing a unittest.TestCase inheritance are a nice catch