Add general CLI utilities and expand tests #2
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This adds most of the tools from our discussion yesterday, though I left a few out that were harder to figure out.
I also made some changes to the tests. The main motivation here was that the Node.js test framework supports running tests in parallel, but only file-by-file. With the tests spread out over multiple files like this, it speeds things up significantly.
I considered another strategy, which would be to define all the tests in one place, and then have a
tests/shard1.test.ts
,tests/shard2.test.ts
, etc. I decided that I didn't like the inflexibility of that, and would rather have the tests grouped by topic.