Introduce the concept of a DRC_PROVIDER which allows
to separate the various DRC functions to their own
areas. This allows, amongst other things, a slimmer core
DRC class, and allows DRC functions to be separately testable.
The courtyard DRCs (overlap, missing and malformed)
are the first victims, so instrumentation can be added to this function.
Add some unit tests on this DRC function, as well a few re-usable PCB-based
utility functions in a library (qa_pcbnew_utils) that could be shared between
unit tests and other utilities.
An unhappy conjunction of GCC bug #56480 [1] and Boost having
different namespaces for the print_log_value make it quite
ugly to support this method.
For the limited purposes of the unit tests, a free function in
the unit_test_utils header (in the absence of any implementation
in the main libraries) will do, even if it is a little intrusive.
From Boost 1.64 onwards, the customisation point boost_test_print_type
is avaiable, and anyt print functions should be transitioned over to
that method when the minimum Boost version is 1.64 or higher.
[1] https://gcc.gnu.org/bugzilla/show_bug.cgi?id=56480
Test a few "centre-point-angle" cases and add some
generic geom code for testing vectors and boxes are within
tolerance (since rounding often creeps in).
Much of the arc-checking code will be useful to other
construction methods (e.g. point-point-point).
There are expected failures for the bbox code when
the arc passes though, but does not end on, a quadrant point
(0, 90, 180, 270). This is due to a defective
implementation of SHAPE_ARC::BBox() that does not take
into account the quadrant points. This will be fixed
as a follow-up.
Some functions aren't defined on Boost < 1.59, which is
sadly inclusive of the Ubuntu LTSs.
Make some guards so you can still use these on the newer
Boosts with some useful fallback where possible.
This includes:
* Linkage against the Boost unit test libs
* Configuration of the Boost libs
* A place for common generics "extras" for unit test harnesses
including
* A simple way to allow "expected-failure" tests (without
breaking Boost < 1.58, e.g. Ubuntu LTS)
* Moving some simple numeric predicates from the geom tests
to the utils library.
Expand unit test docs to describe the expected failures macro.
Add a few COLOR4D tests, including one with expected failures due
to a pre-existing bug. This will be fixed in a follow-up commit.
jean-pierre charras
John Beard