Grokking the MariaDB test runner (MTR)
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The main test system in the MariaDB open source database project is the mariadb-test-run script (inherited from mysql-test-run). It is easy to run and does not require you to compile any source code.\n

For anyone doing their first contribution to MariaDB: start out by learning how the mariadb-test-run command works and how to efficiently rebuild the MariaDB sources and re-run the test suite.