QTypeRevision consists of two quint8 values: major and minor version. Each of the versions can be unknown. The rules for comparing with the unknown version are as follows: zero version < unknown version < non-zero version At the same time, two unknown versions are considered equal. This makes the comparison a bit tricky, but it still fits into the category of strong ordering. Replace the existing friend relational operators with helper functions and comparison helper macros, making this type strongly ordered. Update the unit-tests to use the new comparison helper test functions. As the test functions check the reversed arguments as well, we can reduce the number of rows for the data-driven comparison test. Fixes: QTBUG-120359 Change-Id: Ib6f1037fc7b5fed148e35ee48b56b05dcd36b3b4 Reviewed-by: Thiago Macieira <thiago.macieira@intel.com> Reviewed-by: Mårten Nordheim <marten.nordheim@qt.io>