chore: Add ./scripts/unit-tests.sh (#1515)

# What does this PR do?
Useful for local development. Now you can just trigger the script and
not care about specific arguments to pass to run unit tests.

[//]: # (If resolving an issue, uncomment and update the line below)
[//]: # (Closes #[issue-number])

## Test Plan

```
$ . ./venv/bin/activate
$ ./scripts/run_tests.sh
$ echo $?
0
```

[//]: # (## Documentation)

Signed-off-by: Ihar Hrachyshka <ihar.hrachyshka@gmail.com>
Co-authored-by: Nathan Weinberg <31703736+nathan-weinberg@users.noreply.github.com>

.github/workflows/unit-tests.yml

@@ -33,7 +33,7 @@ jobs:
 
       - name: Run unit tests
         run: |
-          uv run --python ${{ matrix.python }} --with-editable . --with-editable ".[dev]" --with-editable ".[unit]" pytest --cov=llama_stack -s -v tests/unit/ --junitxml=pytest-report-${{ matrix.python }}.xml --cov-report=html:htmlcov-${{ matrix.python }}
+          PYTHON_VERSION=${{ matrix.python }} ./scripts/unit-tests.sh --cov=llama_stack --junitxml=pytest-report-${{ matrix.python }}.xml --cov-report=html:htmlcov-${{ matrix.python }}
 
       - name: Upload test results
         if: always()

CONTRIBUTING.md

@@ -108,6 +108,22 @@ uv run pre-commit run --all-files
 > [!CAUTION]
 > Before pushing your changes, make sure that the pre-commit hooks have passed successfully.
 
+## Running unit tests
+
+You can run the unit tests by running:
+
+```bash
+source .venv/bin/activate
+./scripts/unit-tests.sh
+```
+
+If you'd like to run for a non-default version of Python (currently 3.10), pass `PYTHON_VERSION` variable as follows:
+
+```
+source .venv/bin/activate
+PYTHON_VERSION=3.13 ./scripts/unit-tests.sh
+```
+
 ## Adding a new dependency to the project
 
 To add a new dependency to the project, you can use the `uv` command. For example, to add `foo` to the project, you can run:

scripts/unit-tests.sh

@@ -0,0 +1,19 @@
+#!/bin/sh
+
+# Copyright (c) Meta Platforms, Inc. and affiliates.
+# All rights reserved.
+#
+# This source code is licensed under the terms described in the LICENSE file in
+# the root directory of this source tree.
+
+PYTHON_VERSION=${PYTHON_VERSION:-3.10}
+
+command -v uv >/dev/null 2>&1 || { echo >&2 "uv is required but it's not installed. Exiting."; exit 1; }
+
+uv python find $PYTHON_VERSION
+FOUND_PYTHON=$?
+if [ $FOUND_PYTHON -ne 0 ]; then
+     uv python install $PYTHON_VERSION
+fi
+
+uv run --python $PYTHON_VERSION --with-editable . --with-editable ".[dev]" --with-editable ".[unit]" pytest -s -v tests/unit/ $@