test missing normal in face definition

Author: einarf

tests/fixtures/simple_missing_normal.obj

@@ -0,0 +1,28 @@
+# Comment
+mtllib simple.mtl
+o Simple
+v 0.01 0.02 0.03
+v 0.04 0.05 0.06
+v 0.07 0.08 0.09
+v 0.11 0.12 0.13
+vt 10 11
+vt 12 13
+vt 14 15
+vt 16 17
+vn 20 21 22
+usemtl Material.simple
+f 2/3/1 1/2/1 3/1/1
+o SimpleB
+v 1.0 0.0 1.0
+v -1.0 0.0 1.0
+v 1.0 0.0 -1.0
+v -1.0 0.0 -1.0
+vt 0.0 1.0
+vt 0.0 0.0
+vt 1.0 0.0
+vt 1.0 1.0
+vn 0.0 1.0 0.0
+usemtl Material2.simple
+f 6/7/2 5/6/2 7/5/2
+f 6/7/ 5/6/ 7/5/
+f 6/7/2 5/6/2 7/5/2

tests/test_parser.py

@@ -179,7 +179,7 @@ def testObjColors(self):
         self.assertEqual(self.mesh2.materials[0].vertex_format, "T2F_C3F_N3F_V3F")
 
     def test_undefined_uvs(self):
-        """obj file were some uv entries are undefiend"""
+        """obj file were some uv entries are undefined"""
         meshes = pywavefront.Wavefront(fixture('simple_missing_uv.obj'))
         self.mesh2 = meshes.mesh_list[1]
 
@@ -199,6 +199,27 @@ def test_undefined_uvs(self):
 
         self.assertEqual(self.mesh2.materials[0].vertex_format, "T2F_N3F_V3F")
 
+    def test_undefined_normals(self):
+        """obj file were some uv entries are undefined"""
+        meshes = pywavefront.Wavefront(fixture('simple_missing_normal.obj'))
+        self.mesh2 = meshes.mesh_list[1]
+
+        self.assertEqual(self.mesh2.materials[0].vertices, [
+            1.0, 0.0, 0.0, 1.0, 0.0, -1.0, 0.0, 1.0,
+            0.0, 0.0, 0.0, 1.0, 0.0, 1.0, 0.0, 1.0,
+            0.0, 1.0, 0.0, 1.0, 0.0, 1.0, 0.0, -1.0,
+
+            1.0, 0.0, 20, 21, 22, -1.0, 0.0, 1.0,
+            0.0, 0.0, 20, 21, 22,  1.0, 0.0, 1.0,
+            0.0, 1.0, 20, 21, 22,  1.0, 0.0, -1.0,
+
+            1.0, 0.0, 0.0, 1.0, -0.0, -1.0, 0.0, 1.0,
+            0.0, 0.0, 0.0, 1.0, -0.0, 1.0, 0.0, 1.0,
+            0.0, 1.0, 0.0, 1.0, -0.0, 1.0, 0.0, -1.0,
+        ])
+
+        self.assertEqual(self.mesh2.materials[0].vertex_format, "T2F_N3F_V3F")
+
 
 class TestMtlParser(unittest.TestCase):
     def setUp(self):