This class had been added in the `morx` branch, and I wanted
to merge it into master. While writing tests for it, I noticed
that `otConverters` has meanwhile been extended by an `UInt8`
converter. Therefore, only adding a test for the existing
implementation.
I've got some changes in the `morx` branch which I'd like to merge
into master. So I'm writing this unit test as an example how to
test `otConverter` code.
When the tests are run with `python setup.py test` (e.g. from the ./run-tests.sh
script), we can't have setuptools install pre-compiled wheels for extra test
requirements (e.g. Brotli, unicodedata2).
Instead of failing, it's better that we skip the tests that have such extra
requirements.
NOTE: The recommended way to run the full test suite is by using tox
(like we do on the CI), or by installing pytest and the rests of requirements.txt,
and then run `pytest` command directly.
* TupleVariationTest.test_compileDeltaValues(): also test floats
* TupleVariation: round deltas before encoding
Python 3 was raising 'struct.error: required argument is not an integer' and Python 2 was truncating when deltas are floats
Also fixes a bug where glyph alternates in MTI feature files were
wrongly sorted by glyph name. After this change, the output is using
the same ordering as in the input MTI feature file.
Fixes https://github.com/fonttools/fonttools/issues/833.
