langchain/tests/README.md
sergerdn 6dc86ad48f
feat: add pytest-vcr for recording HTTP interactions in integration tests (#2445)
Using `pytest-vcr` in integration tests has several benefits. Firstly,
it removes the need to mock external services, as VCR records and
replays HTTP interactions on the fly. Secondly, it simplifies the
integration test setup by eliminating the need to set up and tear down
external services in some cases. Finally, it allows for more reliable
and deterministic integration tests by ensuring that HTTP interactions
are always replayed with the same response.
Overall, `pytest-vcr` is a valuable tool for simplifying integration
test setup and improving their reliability

This commit adds the `pytest-vcr` package as a dependency for
integration tests in the `pyproject.toml` file. It also introduces two
new fixtures in `tests/integration_tests/conftest.py` files for managing
cassette directories and VCR configurations.

In addition, the
`tests/integration_tests/vectorstores/test_elasticsearch.py` file has
been updated to use the `@pytest.mark.vcr` decorator for recording and
replaying HTTP interactions.

Finally, this commit removes the `documents` fixture from the
`test_elasticsearch.py` file and replaces it with a new fixture defined
in `tests/integration_tests/vectorstores/conftest.py` that yields a list
of documents to use in any other tests.

This also includes my second attempt to fix issue :
https://github.com/hwchase17/langchain/issues/2386

Maybe related https://github.com/hwchase17/langchain/issues/2484
2023-04-07 07:28:57 -07:00

57 lines
1.9 KiB
Markdown

# Readme tests(draft)
## Integrations Tests
### Prepare
This repository contains functional tests for several search engines and databases. The
tests aim to verify the correct behavior of the engines and databases according to their
specifications and requirements.
To run some integration tests, such as tests located in
`tests/integration_tests/vectorstores/`, you will need to install the following
software:
- Docker
- Python 3.8.1 or later
We have optional group `test_integration` in the `pyproject.toml` file. This group
should contain dependencies for the integration tests and can be installed using the
command:
```bash
poetry install --with test_integration
```
Any new dependencies should be added by running:
```bash
poetry add some_new_deps --group "test_integration"
```
Before running any tests, you should start a specific Docker container that has all the
necessary dependencies installed. For instance, we use the `elasticsearch.yml` container
for `test_elasticsearch.py`:
```bash
cd tests/integration_tests/vectorstores/docker-compose
docker-compose -f elasticsearch.yml up
```
Additionally, it's important to note that some integration tests may require certain
environment variables to be set, such as `OPENAI_API_KEY`. Be sure to set any required
environment variables before running the tests to ensure they run correctly.
### Recording HTTP interactions with pytest-vcr
Some of the integration tests in this repository involve making HTTP requests to
external services. To prevent these requests from being made every time the tests are
run, we use pytest-vcr to record and replay HTTP interactions.
When running tests in a CI/CD pipeline, you may not want to modify the existing
cassettes. You can use the --vcr-record=none command-line option to disable recording
new cassettes. Here's an example:
```bash
pytest tests/integration_tests/vectorstores/test_elasticsearch.py --vcr-record=none
```