chore: add testing instructions

justfile

@@ -0,0 +1,11 @@
+test:
+    #!/usr/bin/env bash
+    cd testing
+    command -v uv || (echo 'uv package manager not found; exiting.' && exit 1)
+    test -d .venv || uv venv
+    . .venv/bin/activate
+    uv pip compile requirements.in -o requirements.txt
+    uv pip sync requirements.txt
+    cargo build
+    pytest -vv --color=yes
+

testing/README.md

@@ -1,9 +1,18 @@
 End-to-end testing for odoo-lsp.
 
+## Running tests
+
+Make sure [uv] and [just] are installed, then run `just test`.
+These same tests are also run in CI, so it's recommended to add them after a bug fix to prevent regressions.
+
+[uv]: https://docs.astral.sh/uv/
+[just]: https://github.com/casey/just
+
+## Creating tests
+
+See [fixtures/basic/foo/models.py](fixtures/basic/foo/models.py) for an example how to write tests.
+You can use the below command to quickly scaffold a test case. (TODO)
+
 ```shell
-pip install -U setuptools uv
-uv venv
-source .venv/bin/activate
-uv pip compile requirements.in > requirements.txt
-uv pip sync requirements.txt
+python scaffold.py fixtures/testcase [foo bar ...]
 ```

testing/pyproject.toml

@@ -1,3 +1,6 @@
 [tool.pytest.ini_options]
 timeout = 30
-session_timeout = 600
+session_timeout = 600
+
+[tool.pyright]
+venv = ".venv"