Never underestimate the bandwidth of a station wagon full of tapes hurtling down the highway. Computer Networks, 3rd ed., p. 83. (paraphrasing Dr. Warren Jackson, Director, University of Toronto Computing Services (UTCS) circa 1985)
Spent a couple of days tracking down a strange error using PHPunit and SQLite for testing a complex application. The test suite kept throwing
PDOException: SQLSTATE[HY000]: General error: 5 database is lockedand halting in test that didn't touch the database. The problem was in an unrelated test that ran before it. The test uses iterators to examine database contents, but didn't iterate all the way through the result set. The iterator left the database locked.
Update: None of this will work now. Homebrew has changed all of the PHP formulas and removed a bunch of stuff. Assuming you have xcode and homebrew installed and running, follow these steps.
Blogging this because it took far too long to figure out and because the documentation is spread across too many pages and isn't at all clear.