[tests] Add test for symfont

Tests/misc/symfont_test.py

@@ -0,0 +1,44 @@
+try:
+    from fontTools.misc.symfont import AreaPen
+except ImportError:
+    AreaPen = None
+import unittest
+import pytest
+
+precision = 6
+
+
+def draw1_(pen):
+    pen.moveTo((254, 360))
+    pen.lineTo((771, 367))
+    pen.curveTo((800, 393), (808, 399), (819, 412))
+    pen.curveTo((818, 388), (774, 138), (489, 145))
+    pen.curveTo((188, 145), (200, 398), (200, 421))
+    pen.curveTo((209, 409), (220, 394), (254, 360))
+    pen.closePath()
+
+
+class AreaPenTest(unittest.TestCase):
+    @pytest.mark.skipif(AreaPen is None, reason="sympy not installed")
+    def test_PScontour_clockwise_line_first(self):
+        pen = AreaPen(glyphset=None)
+        draw1_(pen)
+        self.assertEqual(-104561.35, round(pen.value, precision))
+
+    @pytest.mark.skipif(AreaPen is None, reason="sympy not installed")
+    def test_openPaths(self):
+        pen = AreaPen()
+        pen.moveTo((0, 0))
+        pen.endPath()
+        self.assertEqual(0, pen.value)
+
+        pen.moveTo((0, 0))
+        pen.lineTo((1, 0))
+        with self.assertRaises(NotImplementedError):
+            pen.endPath()
+
+
+if __name__ == "__main__":
+    import sys
+
+    sys.exit(unittest.main())