def test_InvalidPrimvar(self):
p = UsdGeom.Primvar()
# We can always call GetAttr, but it will return a null attribute
# if we don't have a prim.
self.assertEqual(p.GetAttr(), Usd.Attribute())
# This used to crash before the Primvar __getattribute__ method
# was overridden to test the validity of the underlying prim.
with self.assertRaises(RuntimeError):
p.BlockIndices()
# We can't even call GetName, because there is no attribute.
with self.assertRaises(RuntimeError):
p.BlockIndices()
# Now do some tests with a valid prim, but invalid attribute.
stage = Usd.Stage.CreateInMemory('myTest.usda')
gp = UsdGeom.Mesh.Define(stage, '/myMesh').GetPrim()
u1 = UsdGeom.Primvar(gp.GetAttribute('primvars:u1'))
# The attribute isn't valid, and the primvar isn't defined.
self.assertFalse(u1.GetAttr().IsValid())
self.assertFalse(u1.IsDefined())
# But we can still get back to the source primitive.
self.assertEqual(u1.GetAttr().GetPrim(), gp)
# And we can still access name information.
self.assertEqual(u1.GetName(), 'primvars:u1')
self.assertEqual(u1.GetBaseName(), 'u1')
# But attempting to access any real primvar information will raise
# a RuntimeError exception.
with self.assertRaises(RuntimeError):
u1.GetElementSize()
def test_InvalidXformOps(self):
s = Usd.Stage.CreateInMemory()
p = s.DefinePrim('/World', 'Xform')
x = UsdGeom.Xformable(p)
# Create an attribute that is not in the xformOp namespace.
attr1 = p.CreateAttribute("myXformOp:transform", Sdf.ValueTypeNames.Matrix4d)
self._TestInvalidXformOp(attr1)
# Create an xform op with an invalid optype.
attr2 = p.CreateAttribute("xformOp:translateXYZ", Sdf.ValueTypeNames.Double3)
self._TestInvalidXformOp(attr2)
# Create an xform op with opType=transform and typeName=Matrix4f.
with self.assertRaises(RuntimeError):
xformOp = x.AddTransformOp(precision=UsdGeom.XformOp.PrecisionFloat)
# Test Validity of XformOp with no attr
xformOp = UsdGeom.XformOp(Usd.Attribute())
self.assertFalse(xformOp.IsDefined())
self.assertFalse(bool(xformOp))
