mirror of https://github.com/bitcoin/bitcoin
You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
187 lines
7.9 KiB
187 lines
7.9 KiB
Test Shell for Interactive Environments
|
|
=========================================
|
|
|
|
This document describes how to use the `TestShell` submodule in the functional
|
|
test suite.
|
|
|
|
The `TestShell` submodule extends the `BitcoinTestFramework` functionality to
|
|
external interactive environments for prototyping and educational purposes. Just
|
|
like `BitcoinTestFramework`, the `TestShell` allows the user to:
|
|
|
|
* Manage regtest bitcoind subprocesses.
|
|
* Access RPC interfaces of the underlying bitcoind instances.
|
|
* Log events to the functional test logging utility.
|
|
|
|
The `TestShell` can be useful in interactive environments where it is necessary
|
|
to extend the object lifetime of the underlying `BitcoinTestFramework` between
|
|
user inputs. Such environments include the Python3 command line interpreter or
|
|
[Jupyter](https://jupyter.org/) notebooks running a Python3 kernel.
|
|
|
|
## 1. Requirements
|
|
|
|
* Python3
|
|
* `bitcoind` built in the same repository as the `TestShell`.
|
|
|
|
## 2. Importing `TestShell` from the Bitcoin Core repository
|
|
|
|
We can import the `TestShell` by adding the path of the Bitcoin Core
|
|
`test_framework` module to the beginning of the PATH variable, and then
|
|
importing the `TestShell` class from the `test_shell` sub-package.
|
|
|
|
```
|
|
>>> import sys
|
|
>>> sys.path.insert(0, "/path/to/bitcoin/test/functional")
|
|
>>> from test_framework.test_shell import TestShell
|
|
```
|
|
|
|
The following `TestShell` methods manage the lifetime of the underlying bitcoind
|
|
processes and logging utilities.
|
|
|
|
* `TestShell.setup()`
|
|
* `TestShell.shutdown()`
|
|
|
|
The `TestShell` inherits all `BitcoinTestFramework` members and methods, such
|
|
as:
|
|
* `TestShell.nodes[index].rpc_method()`
|
|
* `TestShell.log.info("Custom log message")`
|
|
|
|
The following sections demonstrate how to initialize, run, and shut down a
|
|
`TestShell` object.
|
|
|
|
## 3. Initializing a `TestShell` object
|
|
|
|
```
|
|
>>> test = TestShell().setup(num_nodes=2, setup_clean_chain=True)
|
|
20XX-XX-XXTXX:XX:XX.XXXXXXX TestFramework (INFO): Initializing test directory /path/to/bitcoin_func_test_XXXXXXX
|
|
```
|
|
The `TestShell` forwards all functional test parameters of the parent
|
|
`BitcoinTestFramework` object. The full set of argument keywords which can be
|
|
used to initialize the `TestShell` can be found in [section
|
|
#6](#custom-testshell-parameters) of this document.
|
|
|
|
**Note: Running multiple instances of `TestShell` is not allowed.** Running a
|
|
single process also ensures that logging remains consolidated in the same
|
|
temporary folder. If you need more bitcoind nodes than set by default (1),
|
|
simply increase the `num_nodes` parameter during setup.
|
|
|
|
```
|
|
>>> test2 = TestShell().setup()
|
|
TestShell is already running!
|
|
```
|
|
|
|
## 4. Interacting with the `TestShell`
|
|
|
|
Unlike the `BitcoinTestFramework` class, the `TestShell` keeps the underlying
|
|
Bitcoind subprocesses (nodes) and logging utilities running until the user
|
|
explicitly shuts down the `TestShell` object.
|
|
|
|
During the time between the `setup` and `shutdown` calls, all `bitcoind` node
|
|
processes and `BitcoinTestFramework` convenience methods can be accessed
|
|
interactively.
|
|
|
|
**Example: Mining a regtest chain**
|
|
|
|
By default, the `TestShell` nodes are initialized with a clean chain. This means
|
|
that each node of the `TestShell` is initialized with a block height of 0.
|
|
|
|
```
|
|
>>> test.nodes[0].getblockchaininfo()["blocks"]
|
|
0
|
|
```
|
|
|
|
We now let the first node generate 101 regtest blocks, and direct the coinbase
|
|
rewards to a wallet address owned by the mining node.
|
|
|
|
```
|
|
>>> address = test.nodes[0].getnewaddress()
|
|
>>> test.nodes[0].generatetoaddress(101, address)
|
|
['2b98dd0044aae6f1cca7f88a0acf366a4bfe053c7f7b00da3c0d115f03d67efb', ...
|
|
```
|
|
Since the two nodes are both initialized by default to establish an outbound
|
|
connection to each other during `setup`, the second node's chain will include
|
|
the mined blocks as soon as they propagate.
|
|
|
|
```
|
|
>>> test.nodes[1].getblockchaininfo()["blocks"]
|
|
101
|
|
```
|
|
The block rewards from the first block are now spendable by the wallet of the
|
|
first node.
|
|
|
|
```
|
|
>>> test.nodes[0].getbalance()
|
|
Decimal('50.00000000')
|
|
```
|
|
|
|
We can also log custom events to the logger.
|
|
|
|
```
|
|
>>> test.nodes[0].log.info("Successfully mined regtest chain!")
|
|
20XX-XX-XXTXX:XX:XX.XXXXXXX TestFramework.node0 (INFO): Successfully mined regtest chain!
|
|
```
|
|
|
|
**Note: Please also consider the functional test
|
|
[readme](../test/functional/README.md), which provides an overview of the
|
|
test-framework**. Modules such as
|
|
[key.py](../test/functional/test_framework/key.py),
|
|
[script.py](../test/functional/test_framework/script.py) and
|
|
[messages.py](../test/functional/test_framework/messages.py) are particularly
|
|
useful in constructing objects which can be passed to the bitcoind nodes managed
|
|
by a running `TestShell` object.
|
|
|
|
## 5. Shutting the `TestShell` down
|
|
|
|
Shutting down the `TestShell` will safely tear down all running bitcoind
|
|
instances and remove all temporary data and logging directories.
|
|
|
|
```
|
|
>>> test.shutdown()
|
|
20XX-XX-XXTXX:XX:XX.XXXXXXX TestFramework (INFO): Stopping nodes
|
|
20XX-XX-XXTXX:XX:XX.XXXXXXX TestFramework (INFO): Cleaning up /path/to/bitcoin_func_test_XXXXXXX on exit
|
|
20XX-XX-XXTXX:XX:XX.XXXXXXX TestFramework (INFO): Tests successful
|
|
```
|
|
To prevent the logs from being removed after a shutdown, simply set the
|
|
`TestShell.options.nocleanup` member to `True`.
|
|
```
|
|
>>> test.options.nocleanup = True
|
|
>>> test.shutdown()
|
|
20XX-XX-XXTXX:XX:XX.XXXXXXX TestFramework (INFO): Stopping nodes
|
|
20XX-XX-XXTXX:XX:XX.XXXXXXX TestFramework (INFO): Not cleaning up dir /path/to/bitcoin_func_test_XXXXXXX on exit
|
|
20XX-XX-XXTXX:XX:XX.XXXXXXX TestFramework (INFO): Tests successful
|
|
```
|
|
|
|
The following utility consolidates logs from the bitcoind nodes and the
|
|
underlying `BitcoinTestFramework`:
|
|
|
|
* `/path/to/bitcoin/test/functional/combine_logs.py
|
|
'/path/to/bitcoin_func_test_XXXXXXX'`
|
|
|
|
## 6. Custom `TestShell` parameters
|
|
|
|
The `TestShell` object initializes with the default settings inherited from the
|
|
`BitcoinTestFramework` class. The user can override these in
|
|
`TestShell.setup(key=value)`.
|
|
|
|
**Note:** `TestShell.reset()` will reset test parameters to default values and
|
|
can be called after the TestShell is shut down.
|
|
|
|
| Test parameter key | Default Value | Description |
|
|
|---|---|---|
|
|
| `bind_to_localhost_only` | `True` | Binds bitcoind RPC services to `127.0.0.1` if set to `True`.|
|
|
| `cachedir` | `"/path/to/bitcoin/test/cache"` | Sets the bitcoind datadir directory. |
|
|
| `chain` | `"regtest"` | Sets the chain-type for the underlying test bitcoind processes. |
|
|
| `configfile` | `"/path/to/bitcoin/test/config.ini"` | Sets the location of the test framework config file. |
|
|
| `coveragedir` | `None` | Records bitcoind RPC test coverage into this directory if set. |
|
|
| `loglevel` | `INFO` | Logs events at this level and higher. Can be set to `DEBUG`, `INFO`, `WARNING`, `ERROR` or `CRITICAL`. |
|
|
| `nocleanup` | `False` | Cleans up temporary test directory if set to `True` during `shutdown`. |
|
|
| `noshutdown` | `False` | Does not stop bitcoind instances after `shutdown` if set to `True`. |
|
|
| `num_nodes` | `1` | Sets the number of initialized bitcoind processes. |
|
|
| `perf` | False | Profiles running nodes with `perf` for the duration of the test if set to `True`. |
|
|
| `rpc_timeout` | `60` | Sets the RPC server timeout for the underlying bitcoind processes. |
|
|
| `setup_clean_chain` | `False` | A 200-block-long chain is initialized from cache by default. Instead, `setup_clean_chain` initializes an empty blockchain if set to `True`. |
|
|
| `randomseed` | Random Integer | `TestShell.options.randomseed` is a member of `TestShell` which can be accessed during a test to seed a random generator. User can override default with a constant value for reproducible test runs. |
|
|
| `supports_cli` | `False` | Whether the bitcoin-cli utility is compiled and available for the test. |
|
|
| `tmpdir` | `"/var/folders/.../"` | Sets directory for test logs. Will be deleted upon a successful test run unless `nocleanup` is set to `True` |
|
|
| `trace_rpc` | `False` | Logs all RPC calls if set to `True`. |
|
|
| `usecli` | `False` | Uses the bitcoin-cli interface for all bitcoind commands instead of directly calling the RPC server. Requires `supports_cli`. |
|