1 files changed, 59 insertions, 0 deletions
diff --git a/Tests/pens/cocoaPen_test.py b/Tests/pens/cocoaPen_test.py
new file mode 100644
index 00000000..51795e12
--- /dev/null
+++ b/Tests/pens/cocoaPen_test.py
@@ -0,0 +1,59 @@
+from fontTools.misc.py23 import *
+import unittest
+
+try:
+    from fontTools.pens.cocoaPen import CocoaPen
+    from AppKit import NSBezierPathElementMoveTo, NSBezierPathElementLineTo
+    from AppKit import NSBezierPathElementCurveTo, NSBezierPathElementClosePath
+
+    PATH_ELEMENTS = {
+        # NSBezierPathElement key      desc
+        NSBezierPathElementMoveTo:    'moveto',
+        NSBezierPathElementLineTo:    'lineto',
+        NSBezierPathElementCurveTo:   'curveto',
+        NSBezierPathElementClosePath: 'close',
+    }
+
+    PYOBJC_AVAILABLE = True
+except ImportError:
+    PYOBJC_AVAILABLE = False
+
+
+def draw(pen):
+    pen.moveTo((50, 0))
+    pen.lineTo((50, 500))
+    pen.lineTo((200, 500))
+    pen.curveTo((350, 500), (450, 400), (450, 250))
+    pen.curveTo((450, 100), (350, 0), (200, 0))
+    pen.closePath()
+
+
+def cocoaPathToString(path):
+    num_elements = path.elementCount()
+    output = []
+    for i in range(num_elements - 1):
+        elem_type, elem_points = path.elementAtIndex_associatedPoints_(i)
+        elem_type = PATH_ELEMENTS[elem_type]
+        path_points = " ".join([f"{p.x} {p.y}" for p in elem_points])
+        output.append(f"{elem_type} {path_points}")
+    return " ".join(output)
+
+
+@unittest.skipUnless(PYOBJC_AVAILABLE, "pyobjc not installed")
+class CocoaPenTest(unittest.TestCase):
+    def test_draw(self):
+        pen = CocoaPen(None)
+        draw(pen)
+        self.assertEqual(
+            "moveto 50.0 0.0 lineto 50.0 500.0 lineto 200.0 500.0 curveto 350.0 500.0 450.0 400.0 450.0 250.0 curveto 450.0 100.0 350.0 0.0 200.0 0.0 close ",
+            cocoaPathToString(pen.path)
+        )
+        
+    def test_empty(self):
+        pen = CocoaPen(None)
+        self.assertEqual("", cocoaPathToString(pen.path))
+
+
+if __name__ == '__main__':
+    import sys
+    sys.exit(unittest.main())