tests for new native based lettuce version

[PhiSpel]

Description

closes #172
closes #112
closes #119
closes #186

Checklist

• This pull request is associated to an issue
• This PR contains a description
• Did you add a new method? If so, you need to
  • add method description
  • maybe mention class in the corresponding __init__
  • add an example using the method in examples/advanced_flows/ or examples/simple_flows/
  • add a test in tests/
• Add someone else as reviewer and wait for approval before merging.
• test_boundaries.py
• test_cli.py
• test_collision.py
• test_equilibrium.py
• test_flows.py
• rerun couette, decayingturbulence, doublyshear, poiseuille
• test_force.py
• test_lattices.py
• test_moments.py
• test_native.py
• test_observables.py
• test_readme.py
• test_reporters.py
• test_simulation.py
• test_stencils.py
• test_streaming.py
• test_unit.py
• test_util.py

Synopsis

1. Flow:
   1. Made f inputs to methods optional
   2. removed some redundant passing of f to rho() - this is a continuation of Update examples to cuda-native architecture #198
   3. added initialize_pressure and initialize_fneq properties (default False) and, depending on them, additional pressure_poisson and initialize_fneq methods. The latter could still be in a different file, but they are only used in Flow.
2. Boundary
   1. Passing a Flow instead of Context to get the torch_stencil
   2. Removed call of flow.collision in AntiBounceBackOutlet as this is not always available (see [Feature]: Let boundaries choose to affect collision OR streaming #212)
3. Transform: I worked around the issue of things such as mv() belonging to Flow (see [Bug]: Moment transforms require many methods from deprecated Lattice #222).
4. BGKCollision: removed redundant call of flow.rho()
5. BGKInitialisation: removed as deprecated
6. CouetteFlow: Cosmetics and generalized u0
7. DecayingTurbulence:
   1. Instantiate stencil before super() call.
   2. Added initialize_fneq and initialize_pressure
   3. Give self.randseed to allow deterministic tests.
8. DoublyPeriodicShear2D:
   1. Fixed some minor bugs with self.resolution
   2. added initialize_fneq
   3. added typing
9. LidDrivenCavity: Cosmetics
10. Obstacle: Cosmetics
11. Poiseuille:
    1. Major: fixed resolution-gridsize-l_char_lu interaction.
    2. Default stencil
    3. Minor: Cosmetics, typing
12. TaylorGreenVortex:
    1. Major: reverted UnitConversion (mistake from Update examples to cuda-native architecture #198 ) to arrive at identical solution from old master (l_char_LU = 2pi)
    2. instantiate stencil properly
    3. default initialize_fneq
13. Force, Guo, ShanChen: Added abstract __init__ using Flow instead of Context for Guo to have access to torch_stencil,
14. Guo: updated to native architecture
15. ErrorReporter: cosmetics
16. ObservableReporter: Made Observable an ABC Class and made f inputs optional
17. VTKReporter: changed convert_to_numpy to convert_to_ndarray
18. HDF5Reporter: Update to native and inherit from Reporter class
19. moments.py:
    1. Allow passing stencil as class or as instance
    2. Typing and update from lattice to context
    3. Pass a Flow to Transform.equilibrium() to get its equilibrium, densitiy, and velocity
    4. Added einsum and mv to be independent of changes in .../_Flow/
20. utility.py:
    1. moved pressure_poisson to .../_Flow/
    2. minor updates to native
21. Migrated everything from ./old_tests/
    1. Removed conftest.py: This is now all in tests/common.py
    2. Removed test_readme.py: This is tedious to update manually and in Update README.rst #157 I suggest anyway to remove the code snippet and instead to refer straight to the example files.
22. tests/common.py: Added collection of Collision subclasses and those with conservation properties.
23. tests/native/__init__.py: Skipping native tests alltogether if cuda is not available (in CI).
24. tests/simulation:
    1. removed test_load_and_dump b/c save_checkpoint is deprecated and we should deal with this whole issue separately in HDF5 Writer limits grid resolution #119 and added a test for dump and load #224
    2. removed deprecated test_initialization to test_initialize_pressure (non-Jacobi was discouraged anyway)
25. Other tests were 1:1 migrated.

[pep8speaks]

Hello @PhiSpel! Thanks for updating this PR. We checked the lines you've touched for PEP 8 issues, and found:

There are currently no PEP 8 issues detected in this Pull Request. Cheers! 🍻

Comment last updated at 2024-08-20 14:54:06 UTC

[McBs]

lgtm. Thanks! :-)