Add env for local testing

Author: maxrjones

docs/contributing.rst

@@ -101,6 +101,10 @@ like the following::
     $ source ~/pyenv/numcodecs-dev/bin/activate
     $ pip install -e .[docs,test,msgpack,zfpy]
 
+You may need to initialize the submodule for c-blosc:
+
+    $ git submodule update --init --recursive
+
 To verify that your development environment is working, you can run the unit tests::
 
     $ pytest -v

pyproject.toml

@@ -253,20 +253,39 @@ conflicts = [
     ]
 ]
 
-[tool.pixi.project]
+[tool.pixi.workspace]
 channels = ["conda-forge"]
 platforms = ["linux-64", "osx-arm64", "osx-64", "win-64"]
 
 [tool.pixi.dependencies]
+python = "=3.13"
 clang = ">=19.1.7,<20"
 c-compiler = ">=1.9.0,<2"
 cxx-compiler = ">=1.9.0,<2"
 uv = "*"
 
+[tool.pixi.feature.test.pypi-dependencies]
+numcodecs = { path = ".", editable = true, extras = ["test","test_extras","msgpack","pcodec","zfpy"] }
+
+[tool.pixi.feature.test-google-crc32c.pypi-dependencies]
+numcodecs = { path = ".", editable = true, extras = ["google_crc32c"] }
+
+[tool.pixi.feature.test-crc32c.pypi-dependencies]
+numcodecs = { path = ".", editable = true, extras = ["crc32c"] }
+
+[tool.pixi.environments]
+default = { solve-group = "default" }
+test = ["test"]
+test-crc32c = ["test", "test-crc32c"]
+test-google-crc32c = ["test", "test-google-crc32c"]
+
 [tool.pixi.tasks]
 ls-deps-312 = "uv run --group test-zarr-312 uv pip freeze"
 ls-deps-313 = "uv run --group test-zarr-313 uv pip freeze"
 ls-deps-main = "uv run --group test-zarr-main uv pip freeze"
 test-zarr-312 = "uv run --group test-zarr-312 pytest numcodecs/tests/test_zarr3.py numcodecs/tests/test_zarr3_import.py"
 test-zarr-313 = "uv run --group test-zarr-313 pytest numcodecs/tests/test_zarr3.py numcodecs/tests/test_zarr3_import.py"
 test-zarr-main = "uv run --group test-zarr-main pytest numcodecs/tests/test_zarr3.py numcodecs/tests/test_zarr3_import.py"
+
+[tool.pixi.feature.test.tasks]
+run-tests = "pytest -v"