224e6eb089
These are available in sandboxes without access to files or devices. Also [they are safer and more straightforward](https://en.wikipedia.org/wiki/Entropy-supplying_system_calls) to use than `/dev/urandom` as reading from a file has quite a few edge cases: - Linux: `getrandom(buf, buflen, 0)`. [getrandom(2)](http://man7.org/linux/man-pages/man2/getrandom.2.html) was introduced in version 3.17 of the Linux kernel. - OpenBSD: `getentropy(buf, buflen)`. The [getentropy(2)](http://man.openbsd.org/cgi-bin/man.cgi/OpenBSD-current/man2/getentropy.2) function appeared in OpenBSD 5.6. - FreeBSD and NetBSD: `sysctl(KERN_ARND)`. Not sure when this was added but it has existed for quite a while. Alternatives: - Linux has sysctl `CTL_KERN` / `KERN_RANDOM` / `RANDOM_UUID` which gives 16 bytes of randomness. This may be available on older kernels, however [sysctl is deprecated on Linux](https://lwn.net/Articles/605392/) and even removed in some distros so we shouldn't use it. Add tests for `GetOSRand()`: - Test that no error happens (otherwise `RandFailure()` which aborts) - Test that all 32 bytes are overwritten (initialize with zeros, try multiple times) Discussion: - When to use these? Currently they are always used when available. Another option would be to use them only when `/dev/urandom` is not available. But this would mean these code paths receive less testing, and I'm not sure there is any reason to prefer `/dev/urandom`. Closes: #9676 |
||
|---|---|---|
| .. | ||
| data | ||
| addrman_tests.cpp | ||
| allocator_tests.cpp | ||
| amount_tests.cpp | ||
| arith_uint256_tests.cpp | ||
| base32_tests.cpp | ||
| base58_tests.cpp | ||
| base64_tests.cpp | ||
| bctest.py | ||
| bip32_tests.cpp | ||
| bitcoin-util-test.py | ||
| blockencodings_tests.cpp | ||
| bloom_tests.cpp | ||
| bswap_tests.cpp | ||
| buildenv.py.in | ||
| coins_tests.cpp | ||
| compress_tests.cpp | ||
| crypto_tests.cpp | ||
| cuckoocache_tests.cpp | ||
| dbwrapper_tests.cpp | ||
| DoS_tests.cpp | ||
| getarg_tests.cpp | ||
| hash_tests.cpp | ||
| key_tests.cpp | ||
| limitedmap_tests.cpp | ||
| main_tests.cpp | ||
| Makefile | ||
| mempool_tests.cpp | ||
| merkle_tests.cpp | ||
| miner_tests.cpp | ||
| multisig_tests.cpp | ||
| net_tests.cpp | ||
| netbase_tests.cpp | ||
| pmt_tests.cpp | ||
| policyestimator_tests.cpp | ||
| pow_tests.cpp | ||
| prevector_tests.cpp | ||
| raii_event_tests.cpp | ||
| random_tests.cpp | ||
| README.md | ||
| reverselock_tests.cpp | ||
| rpc_tests.cpp | ||
| sanity_tests.cpp | ||
| scheduler_tests.cpp | ||
| script_P2SH_tests.cpp | ||
| script_tests.cpp | ||
| scriptnum10.h | ||
| scriptnum_tests.cpp | ||
| serialize_tests.cpp | ||
| sighash_tests.cpp | ||
| sigopcount_tests.cpp | ||
| skiplist_tests.cpp | ||
| streams_tests.cpp | ||
| test_bitcoin.cpp | ||
| test_bitcoin.h | ||
| test_bitcoin_fuzzy.cpp | ||
| test_random.h | ||
| testutil.cpp | ||
| testutil.h | ||
| timedata_tests.cpp | ||
| transaction_tests.cpp | ||
| txvalidationcache_tests.cpp | ||
| uint256_tests.cpp | ||
| univalue_tests.cpp | ||
| util_tests.cpp | ||
| versionbits_tests.cpp | ||
Compiling/running unit tests
Unit tests will be automatically compiled if dependencies were met in ./configure
and tests weren't explicitly disabled.
After configuring, they can be run with make check.
To run the bitcoind tests manually, launch src/test/test_bitcoin.
To add more bitcoind tests, add BOOST_AUTO_TEST_CASE functions to the existing
.cpp files in the test/ directory or add new .cpp files that
implement new BOOST_AUTO_TEST_SUITE sections.
To run the bitcoin-qt tests manually, launch src/qt/test/test_bitcoin-qt
To add more bitcoin-qt tests, add them to the src/qt/test/ directory and
the src/qt/test/test_main.cpp file.
Running individual tests
test_bitcoin has some built-in command-line arguments; for example, to run just the getarg_tests verbosely:
test_bitcoin --log_level=all --run_test=getarg_tests
... or to run just the doubledash test:
test_bitcoin --run_test=getarg_tests/doubledash
Run test_bitcoin --help for the full list.
Note on adding test cases
The sources in this directory are unit test cases. Boost includes a unit testing framework, and since bitcoin already uses boost, it makes sense to simply use this framework rather than require developers to configure some other framework (we want as few impediments to creating unit tests as possible).
The build system is setup to compile an executable called test_bitcoin
that runs all of the unit tests. The main source file is called
test_bitcoin.cpp. To add a new unit test file to our test suite you need
to add the file to src/Makefile.test.include. The pattern is to create
one test file for each class or source file for which you want to create
unit tests. The file naming convention is <source_filename>_tests.cpp
and such files should wrap their tests in a test suite
called <source_filename>_tests. For an example of this pattern,
examine uint256_tests.cpp.
For further reading, I found the following website to be helpful in explaining how the boost unit test framework works: http://www.alittlemadness.com/2009/03/31/c-unit-testing-with-boosttest/.
bitcoin-util-test.py
The test directory also contains the bitcoin-util-test.py tool, which tests bitcoin utils (currently just bitcoin-tx). This test gets run automatically during the make check build process. It is also possible to run the test manually from the src directory:
test/bitcoin-util-test.py --srcdir=[current directory]