Use standalone nbtest (#171)

* Use standalone nbtest

* Add a NOTICE file, as requested by legal

CONTRIBUTING.md

@@ -56,6 +56,30 @@ python -m venv .venv
 * Test your notebook end to end before submitting a pull request.
 * Example of a well-formed notebook: [question-answering.ipynb](../notebooks/generative-ai/question-answering.ipynb).
 
+### Automated testing
+
+Some notebooks in this repository are automatically tested with our [nbtest](https://github.com/elastic/nbtest) tool and we welcome any new notebooks to also be included.
+
+The following command shows how to run a notebook with our tester:
+
+```bash
+bin/nbtest notebook/search/00-quick-start.ipynb
+```
+
+The `bin/nbtest` script is a wrapper that install `nbtest`. Alternatively, you can install it directly on your own virtual environment with this command:
+
+```bash
+pip install elastic-nbtest
+```
+
+To run all supported notebooks under this tool, run the following from the top-level directory of this repository:
+
+```bash
+make test
+```
+
+To add a new notebook to our automated testing, you will need to modify the `Makefile` in the directory where your notebook is located. If there is no Makefile in your directory, you can use the one in the `notebooks/search` directory as a model to create one, and then add a reference to it in the top-level `Makefile`.
+
 ## Contributing to example applications 💻
 
 ### Why

Makefile

@@ -1,21 +1,22 @@
-.PHONY: pre-commit test nbtest notebooks
-
-pre-commit:
-	python -m venv .venv
-	.venv/bin/pip install -r requirements-dev.txt
-	.venv/bin/pre-commit install
-
-all: test
+.PHONY: install pre-commit nbtest test notebooks
 
 test: nbtest notebooks
 
-nbtest:
-	$(MAKE) -C test/nbtest
-
 notebooks: search document-chunking
 
 search:
 	$(MAKE) -C notebooks/search
 
 document-chunking:
 	$(MAKE) -C notebooks/document-chunking
+
+install: pre-commit nbtest
+
+pre-commit:
+	python -m venv .venv
+	.venv/bin/pip install -r requirements-dev.txt
+	.venv/bin/pre-commit install
+
+nbtest:
+	python3 -m venv .venv
+	.venv/bin/pip install elastic-nbtest

NOTICE

@@ -0,0 +1,2 @@
+nbtest
+Copyright 2023-2024 Elasticsearch B.V.

bin/nbtest

@@ -1,9 +1,8 @@
 #!/bin/bash
 SCRIPT_DIR=$( cd -- "$( dirname -- "${BASH_SOURCE[0]}" )" &> /dev/null && pwd )
-NBTEST_DIR=$SCRIPT_DIR/../test/nbtest
 
-if [[ ! -f $NBTEST_DIR/.venv/bin/nbtest ]]; then
-    make -C $NBTEST_DIR
+if [[ ! -f $SCRIPT_DIR/../.venv/bin/nbtest ]]; then
+    make nbtest
 fi
-source $NBTEST_DIR/.venv/bin/activate
-nbtest $*
+source $SCRIPT_DIR/../.venv/bin/activate
+$SCRIPT_DIR/../.venv/bin/nbtest $*