Tests overview

Table 1. Tests overview

Tool	Usage
unit tests	make check or ./src/test_bitcoin
functional tests	test/functional/test_runner.py
lint checks	See the documentation
fuzz	See the documentation
util tests	test/util/test_runner.py

Bitcoin Core is also introducing (functional) "stress tests" which challenge the program via interruptions and missing files to ensure that we fail gracefully, e.g. the tests introduced in PR#23289.

Test directory structure

The following diagram gives a brief overview of how the tests are structured within the source directory.

This diagram is not exhaustive and includes simplifications.

dashed lines indicate optional components

The fuzz_targets themselves are located in the test folder, however the fuzz tests are run via the test_runner in src/test so we point fuzz to there.

qa_assets are found in a separate repo altogether, as they are quite large (~3.5GB repo size and ~13.4GB on clone).

Figure 1. Test directory Structure

Test coverage

Bitcoin Core’s test coverage reports can be found here.

Mutation testing

Bitcoin Core’s mutation testing reports can be found here.