Arie van Deursen 🇳🇱🇪🇺🟥<p>What is an example of an open source system with an exceptionally good test suite?</p><p>The example I gave today is <a href="https://mastodon.acm.org/tags/SQLite" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>SQLite</span></a>, with 100% branch coverage, MC/DC testing and 600 (!) test lines per line of code.</p><p>- How SQLite is tested: <a href="https://www.sqlite.org/testing.html" rel="nofollow noopener noreferrer" target="_blank"><span class="invisible">https://www.</span><span class="">sqlite.org/testing.html</span><span class="invisible"></span></a><br>- MC/DC for SQLite: <a href="https://corecursive.com/066-sqlite-with-richard-hipp/#testing-and-aviation-standards" rel="nofollow noopener noreferrer" target="_blank"><span class="invisible">https://</span><span class="ellipsis">corecursive.com/066-sqlite-wit</span><span class="invisible">h-richard-hipp/#testing-and-aviation-standards</span></a><br>- SQLite architecture: <a href="https://www.vldb.org/pvldb/vol15/p3535-gaffney.pdf" rel="nofollow noopener noreferrer" target="_blank"><span class="invisible">https://www.</span><span class="ellipsis">vldb.org/pvldb/vol15/p3535-gaf</span><span class="invisible">fney.pdf</span></a></p><p><a href="https://mastodon.acm.org/tags/sqlite" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>sqlite</span></a> <a href="https://mastodon.acm.org/tags/mcdc" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>mcdc</span></a> <a href="https://mastodon.acm.org/tags/testcoverage" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>testcoverage</span></a></p>