1 files changed, 104 insertions, 0 deletions
diff --git a/Tests/qu2cu/qu2cu_test.py b/Tests/qu2cu/qu2cu_test.py
new file mode 100644
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+++ b/Tests/qu2cu/qu2cu_test.py
@@ -0,0 +1,104 @@
+# Copyright 2023 Behdad Esfahbod. All Rights Reserved.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+import unittest
+import pytest
+
+from fontTools.qu2cu import quadratic_to_curves
+from fontTools.qu2cu.qu2cu import main as qu2cu_main
+from fontTools.qu2cu.benchmark import main as benchmark_main
+
+import os
+import json
+from fontTools.cu2qu import curve_to_quadratic
+
+
+class Qu2CuTest:
+    @pytest.mark.parametrize(
+        "quadratics, expected, tolerance, cubic_only",
+        [
+            (
+                [
+                    [(0, 0), (0, 1), (2, 1), (2, 0)],
+                ],
+                [
+                    ((0, 0), (0, 4 / 3), (2, 4 / 3), (2, 0)),
+                ],
+                0.1,
+                True,
+            ),
+            (
+                [
+                    [(0, 0), (0, 1), (2, 1), (2, 2)],
+                ],
+                [
+                    ((0, 0), (0, 4 / 3), (2, 2 / 3), (2, 2)),
+                ],
+                0.2,
+                True,
+            ),
+            (
+                [
+                    [(0, 0), (0, 1), (1, 1)],
+                    [(1, 1), (3, 1), (3, 0)],
+                ],
+                [
+                    ((0, 0), (0, 1), (1, 1)),
+                    ((1, 1), (3, 1), (3, 0)),
+                ],
+                0.2,
+                False,
+            ),
+            (
+                [
+                    [(0, 0), (0, 1), (1, 1)],
+                    [(1, 1), (3, 1), (3, 0)],
+                ],
+                [
+                    ((0, 0), (0, 2 / 3), (1 / 3, 1), (1, 1)),
+                    ((1, 1), (7 / 3, 1), (3, 2 / 3), (3, 0)),
+                ],
+                0.2,
+                True,
+            ),
+        ],
+    )
+    def test_simple(self, quadratics, expected, tolerance, cubic_only):
+        expected = [
+            tuple((pytest.approx(p[0]), pytest.approx(p[1])) for p in curve)
+            for curve in expected
+        ]
+
+        c = quadratic_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]
+
+    def test_main(self):
+        # Just for coverage
+        qu2cu_main()
+        benchmark_main()