W. J. van der Laan 7740ebcb02
Merge bitcoin/bitcoin#22648: doc, test: improve i2p/tor docs and i2p reachable unit tests
017597767b977bb8fe11be8e2012130df1dffd30 Add I2P network SetReachable/IsReachable unit test assertions (Jon Atack)
b87a9c4d13329a6236124d4b93580c4df8107b32 Improve doc/i2p.md regarding I2P router options/versions (Jon Atack)
bebcf785c080df9273e03b854832ba3dbd4320ec Update i2p.md and tor.md regarding -onlynet config option (Jon Atack)

Pull request description:

  This pull addresses https://github.com/bitcoin/bitcoin/issues/22634#issuecomment-894104681 and various user feedback/questions, updates the -onlynet documentation in doc/i2p.md and doc/tor.md per #22651 (src/init.cpp is already fine) and fills in some missing I2P unit test coverage.

  Note: this PR depends in part on whether #22651 is merged in order to propose the correct -onlynet documentation (it is currently aligned with the change in #22651), so that PR should be decided or merged first.

ACKs for top commit:
  Rspigler:
    Re-ACK 017597767b977bb8fe11be8e2012130df1dffd30
  prayank23:
    reACK 017597767b
  vasild:
    ACK 017597767b977bb8fe11be8e2012130df1dffd30

Tree-SHA512: ae606437522bfccdfb7508108cddc7dfede2385e30a0561dbd007b784ed2639962c28552eb0e9336412faa323637fe964c26b8d8fc6dcf9fc63734ac00d05736
2021-08-26 12:44:46 +02:00
..
2021-08-05 09:53:03 +02:00

Unit tests

The sources in this directory are unit test cases. Boost includes a unit testing framework, and since Bitcoin Core 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 set up to compile an executable called test_bitcoin that runs all of the unit tests. The main source file for the test library is found in util/setup_common.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 unit tests manually, launch src/test/test_bitcoin. To recompile after a test file was modified, run make and then run the test again. If you modify a non-test file, use make -C src/test to recompile only what's needed to run the unit tests.

To add more unit 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 GUI unit tests manually, launch src/qt/test/test_bitcoin-qt

To add more GUI unit 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 -- DEBUG_LOG_OUT

log_level controls the verbosity of the test framework, which logs when a test case is entered, for example. The DEBUG_LOG_OUT after the two dashes redirects the debug log, which would normally go to a file in the test datadir (BasicTestingSetup::m_path_root), to the standard terminal output.

... or to run just the doubledash test:

test_bitcoin --run_test=getarg_tests/doubledash

Run test_bitcoin --help for the full list.

Adding test cases

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, see uint256_tests.cpp.

Logging and debugging in unit tests

make check will write to a log file foo_tests.cpp.log and display this file on failure. For running individual tests verbosely, refer to the section above.

To write to logs from unit tests you need to use specific message methods provided by Boost. The simplest is BOOST_TEST_MESSAGE.

For debugging you can launch the test_bitcoin executable with gdbor lldb and start debugging, just like you would with any other program:

gdb src/test/test_bitcoin