testing

TL;DR: I introduce assert_fields and assert_copy and provide their code. (Updated 2019-12-22 with a new syntax for assert_copy.) I  used to say "All the words in a test should be about the purpose of the test." I'll probably be exploring

TL;DR: Chain assertions for scannability. Here's some code to help. I suspect tests are more often scanned than read. When a test unexpectedly fails, I think people often jump to its source. But they don't read that source sequentially from the top; instead,