Crate tests

Integration tests

Functions

check_proposals	Verify all edits under version control can be correctly apply to their map.
dump_route_goldenfile	Describe all public transit routes and keep under version control to spot diffs easily.
dump_turn_goldenfile	Verify what turns are generated by writing (from lane, to lane, turn type).
import_map	Run the contents of a .osm through the full map importer with default options.
main
smoke_test	Simulate an hour on every map.
test_lane_changing	Verify lane-chaging behavior is overall reasonable, by asserting all cars and bikes can complete their trip under a time limit.
test_map_importer	Test the map pipeline by importing simple, handcrafted .osm files, then emitting goldenfiles that summarize part of the generated map. Keep the goldenfiles under version control to notice when they change. The goldenfiles (and changes to them) themselves aren't easy to understand, but the test maps are.