hmm why does Arbitrary produce a Vec of only three elements when I give it 100KB of Unstructured data? The enum in the vec has like a dozen alternatives a few of which have a u8 parameter, so I would expect at least 50K elements from that much input data

trying to use Arbitrary::size_hint() and it gives me a number that isn’t big enough to fill the array with the expected amount of randomness

I’m bodging it by multiplying the size hint by 1.1 which seems deeply unsatisfactory ugh maybe i should debug it

hmm, `Arbitrary` says the size_hint for my enum is 4, but it looks like `derive-arbitrary` chooses the variant using a u32, so it will need another byte for some of the constructors, so 4 is an underestimate

my enum has 14 variants, 4 of which take a u8 and 10 of which are nullary (10 * 4 + 4 * 5) / (14 * 4) = 1.07 so my eyeball factor of 1.1 was fairly accurate! 🤓

now i am failing to persuade `cargo-expand` to expand my test $ cargo +nightly expand --test=test::bmpvec::test::test error: no test target named `test::bmpvec::test::test` well that’s the name you print when running the tests, so how do i find out what kind of name you want?

that big long thing is the name of the *test case* not the test itself. It's awkward naming but --test is more about *files* in tests/*.rs.

hmm, rustc says --test=src/test/bmpvec.rs isn't a test either