Problem: tests/README.md either wrong or redundant (#2479)

The information on that page was either wrong or redundant, so I either deleted it or linked to where to find the same information in the docs about contributing to BigchainDB.

tests/README.md

@@ -4,103 +4,13 @@ SPDX-License-Identifier: (Apache-2.0 AND CC-BY-4.0)
 Code is Apache-2.0 and docs are CC-BY-4.0
 --->
 
-# BigchainDB Server Tests
+# BigchainDB Server Unit Tests
 
-## The tests/ Folder
+Most of the tests in the `tests/` folder are unit tests. For info about how to write and run tests, see [the docs about contributing to BigchainDB](http://docs.bigchaindb.com/projects/contributing/en/latest/index.html), especially:
 
-The `tests/` folder is where all the tests for BigchainDB Server live. Most of them are unit tests. Integration tests are in the [`tests/integration/` folder](./integration/).
+- [Write Code - Remember to Write Tests](http://docs.bigchaindb.com/projects/contributing/en/latest/dev-setup-coding-and-contribution-process/write-code.html#remember-to-write-tests)
+- [Notes on Running a Local Dev Node with Docker Compose](http://docs.bigchaindb.com/projects/contributing/en/latest/dev-setup-coding-and-contribution-process/run-node-with-docker-compose.html), especially `make test`
+- [
+Notes on Running a Local Dev Node as Processes (and Running All Tests)](http://docs.bigchaindb.com/projects/contributing/en/latest/dev-setup-coding-and-contribution-process/run-node-as-processes.html)
 
-A few notes:
-
-- [`tests/common/`](./common/) contains self-contained tests only testing
-  [`bigchaindb/common/`](../bigchaindb/common/)
-- [`tests/backend/`](./backend/) contains tests requiring
-  the database backend (MongoDB)
-
-
-## Writing Tests
-
-We write unit and integration tests for our Python code using the [pytest](http://pytest.org/latest/) framework. You can use the tests in the `tests/` folder as templates or examples.
-
-
-## Running Tests
-
-### Running Tests Directly
-
-If you installed BigchainDB Server using `pip install bigchaindb`, then you
-didn't install the tests. Before you can run all the tests, you must install
-BigchainDB from source. The [`CONTRIBUTING.md` file](../CONTRIBUTING.md) has
-instructions for how to do that.
-
-Next, make sure you have Local MongoDB running in the background. You
-can run MongoDB using `mongod`.
-
-The `pytest` command has many options. If you want to learn about all the
-things you can do with pytest, see [the pytest
-documentation](http://pytest.org/latest/). We've also added a customization to
-pytest:
-
-`--database-backend`: Defines the backend to use for the tests. It defaults to
-`localmongodb`.
-
-Now you can run all tests using:
-```text
-pytest -v
-```
-
-or, if that doesn't work, try:
-```text
-python -m pytest -v
-```
-
-or:
-```text
-python setup.py test
-```
-
-How does `python setup.py test` work? The documentation for [pytest-runner](https://pypi.python.org/pypi/pytest-runner) explains.
-
-The `pytest` command has many options. If you want to learn about all the things you can do with pytest, see [the pytest documentation](http://pytest.org/latest/). We've also added a customization to pytest:
-
-
-### Running Tests with Docker Compose
-
-You can also use [Docker Compose](https://docs.docker.com/compose/) to run all the tests.
-
-First, bring up all the services BigchainDB, MongoDB, Tendermint in the background:
-
-```text
-$ docker-compose up -d bdb
-```
-
-then run the tests using:
-
-```text
-$ docker-compose run --rm --no-deps bigchaindb pytest -v
-```
-
-## Automated Testing of All Pull Requests
-
-We use [Travis CI](https://travis-ci.com/), so that whenever someone creates a new BigchainDB pull request on GitHub, Travis CI gets the new code and does _a bunch of stuff_. We use the same `docker-compose.yml` for tests. It tells Travis CI how to install BigchainDB, how to run all the tests, and what to do "after success" (e.g. run `codecov`). (We use [Codecov](https://codecov.io/) to get a rough estimate of our test coverage.)
-
-
-### Tox
-
-We use [tox](https://tox.readthedocs.io/en/latest/) to run multiple suites of tests against multiple environments during automated testing. Generally you don't need to run this yourself, but it might be useful when troubleshooting a failing Travis CI build.
-
-To run all the tox tests, use:
-```text
-tox
-```
-
-or:
-```text
-python -m tox
-```
-
-To run only a few environments, use the `-e` flag:
-```text
-tox -e {ENVLIST}
-```
-
-where `{ENVLIST}` is one or more of the environments specified in the [tox.ini file](../tox.ini).
+Note: There are acceptance tests in the `acceptance/` folder (at the same level in the hierarchy as the `tests/` folder).