user87291: What's the recommended way to start testing the Bitcoin Core source code.
Thanks in advance,
Jim

user13866: 
What's the recommended way to start testing the Bitcoin Core source code?
testing for verification of bug fixes

See https://github.com/bitcoin/bitcoin/blob/master/src/test/README.md which says:

To run the bitcoind 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 bitcoind tests.
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.

There is more.

87291: <p>What's the recommended way to start testing the Bitcoin Core source code.</p>

<p>Thanks in advance,
Jim</p>
 13866: <blockquote>
<p><strong>What's the recommended way to start testing the Bitcoin Core source code?</strong></p>
<p><strong>testing for verification of bug fixes</strong></p>
</blockquote>
<p>See <a href="https://github.com/bitcoin/bitcoin/blob/master/src/test/README.md" rel="nofollow noreferrer">https://github.com/bitcoin/bitcoin/blob/master/src/test/README.md</a> which says:</p>
<blockquote>
<p>To run the bitcoind 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 bitcoind tests.</p>
<p>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.</p>
<p>To run the bitcoin-qt tests manually, launch src/qt/test/test_bitcoin-qt</p>
<p>To add more bitcoin-qt tests, add them to the src/qt/test/ directory and the src/qt/test/test_main.cpp file.</p>
</blockquote>
<p>There is more.</p>
