How to test materializing assets (with partitions)

[C-Loftus]

Are there any examples for unit testing asset materializations? Asset selections don't seem to be able to be passed into materialize and I can't seem to use any of the load_asset* functions.

This does not work due to type mismatch

from dagster import materialize, AssetSelection

def test_materialize_configs():
    selection = AssetSelection.assets("my_config")
    res = materialize(assets=selection) 
    assert res.success

This does not work either. I cannot figure out the proper package / module layout. I mainly just want to select the asset by name, not need to figure out the proper relative path to the asset.

from dagster import materialize, load_assets_from_package_module
import main


def test_materialize_configs():
    res = materialize(
        assets=load_assets_from_package_module(main),
        selection=[
            "my_config",
        ],
    )
    assert res.success

I am also trying to test asset materialization for assets that do not have a partition name until midway through the pipeline. But I haven't been able to actually get to that point since I am stuck on how to test materializing an asset.

This is my code directory that gets copied into the dockerfile for the dagster user code. My assets are in main.py but I am unclear how to get the asset definition to materialize from there from within test_e2e.py

tree code/ -L 2
code/
├── __pycache__
│   ├── main.cpython-310.pyc
│   └── test_e2e.cpython-310-pytest-8.3.3.pyc
├── lib
│   ├── __init__.py
│   ├── __pycache__
│   ├── classes.py
│   ├── env.py
│   ├── types.py
│   └── utils.py
├── main.py
├── readme.md
└── test
    ├── __pycache__
    └── test_e2e.py

6 directories, 10 files

Thank you very much

[C-Loftus]

Not sure on partitions but this was an issue with code was conflicting with a built in python module by the same name