Fuzzes one fuzz target, by the test's line or name:
$ mix fuzz test/jason_test.exs:6
$ mix fuzz test/jason_test.exs:"fuzz Jason never crashes"
Failing inputs are saved as seed corpus to test/fixtures/fuzz/ and replayed by mix test from then on.
You can configure this with :corpus_dir under the :ex_fuzz key of your project config.
Options
--max-time- how long to fuzz, in milliseconds.--max-runs- how many inputs to run.--timeout- sets the timeout per input, in milliseconds.--trace- fuzzes with detailed reporting, ignoring input timeouts.
Without --max-time or --max-runs, fuzzing runs until an input fails the test.