Start a test suite about osm2streets HOT 4 CLOSED

@dabreegster, with the addition of some docs explaining an approach for

1. running tests: from cd to cargo test,
2. comparing and updating the goldenfiles, and
3. adding a new test (doing the goldenfile update pattern I guess),

I am happy to call the test suite "started", close this issue, and hack whatever I need on top of the existing tests, as I need them.

from osm2streets.

@dabreegster, have you thought about [generating test from resource files using build scripts]? or test-generator?

It would be a nicer experience to have each test file be it's own test. Then slicing and dicing of tests, and locating the source of the failing test, and treating tests independently, etc. is all handled by the test runners. (My IDE is a testrunner too, with "rerun failed" and all sorts of different things).

from osm2streets.

A separate test per directory would be ideal, I didn't look into it yet. That crate looks like it could work nicely!

So my TODOs:

• rename cfg.json -> test.json and output.json -> raw_map.geojson
• docs
• split tests

from osm2streets.

The very promising tests crate hits the nail on the head, testing multiple projects under the same roof.

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