Add [test] and update CONTRIBUTING (#848)

* Add [test] and update CONTRIBUTING

* pr comments

.github/workflows/release.yml

@@ -16,7 +16,7 @@ jobs:
             test-script: |
                 cp -r ${{ github.workspace }}/tests ./tests
                 cp ${{ github.workspace }}/pyproject.toml ./pyproject.toml
-                python -m pip install -r ./tests/requirements.txt
+                python -m pip install -e ".[tests]"
                 pytest
             pypi-token: ${{ secrets.pypi_token }}
             github-user: patrick-kidger

.github/workflows/run_tests.yml

@@ -23,7 +23,7 @@ jobs:
       - name: Install dependencies
         run: |
           python -m pip install --upgrade pip
-          python -m pip install -r ./tests/requirements.txt
+          python -m pip install -e ".[tests]"
 
       - name: Checks with pre-commit
         uses: pre-commit/action@v2.0.3

CONTRIBUTING.md

@@ -34,7 +34,7 @@ Now make your changes. Make sure to include additional tests if necessary.
 Next verify the tests all pass:
 
 ```bash
-pip install pytest
+pip install -e ".[tests]"
 pytest
 ```
 

pyproject.toml

@@ -55,3 +55,10 @@ reportIncompatibleMethodOverride = true
 reportIncompatibleVariableOverride = false  # Incompatible with eqx.AbstractVar
 reportFunctionMemberAccess = false
 include = ["equinox", "tests"]
+
+[project.optional-dependencies]
+tests = [
+    "pytest",
+    "beartype",
+    "optax"
+]