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[qu2cu] Add roundtrip test

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This commit is contained in:
Behdad Esfahbod 2023-02-18 08:54:00 -07:00
parent e76f962883
commit 701a75c74a
1 changed files with 19 additions and 0 deletions
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19
Tests/qu2cu/qu2cu_test.py
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@ -17,6 +17,9 @@ import pytest
from fontTools.qu2cu import quadratic_to_curves, quadratics_to_curves
import os
import json
from fontTools.cu2qu import curve_to_quadratic
class Qu2CuTest:
@pytest.mark.parametrize(
@ -81,3 +84,19 @@ class Qu2CuTest:
c = quadratics_to_curves(quadratics, tolerance, cubic_only)
assert c == expected
def test_roundtrip(self):
DATADIR = os.path.join(os.path.dirname(__file__), "..", "cu2qu", "data")
with open(os.path.join(DATADIR, "curves.json"), "r") as fp:
curves = json.load(fp)
tolerance = 1
splines = [curve_to_quadratic(c, tolerance) for c in curves]
reconsts = [quadratic_to_curves(spline, tolerance) for spline in splines]
for curve, reconst in zip(curves, reconsts):
assert len(reconst) == 1
curve = tuple((pytest.approx(p[0]), pytest.approx(p[1])) for p in curve)
assert curve == reconst[0]