def test_override(self):
code = """\
class BadComponent(Component):
run = Float(iotype='in')
"""
assert_raises(self, code, globals(), locals(), NameError,
"BadComponent overrides attribute 'run' of Component",
use_exec=True)
code = "Component.add_class_trait('run', Float(iotype='in'))"
assert_raises(self, code, globals(), locals(), NameError,
"Would override attribute 'run' of Component")
comp = Component()
comp.add_trait('x', Float(iotype='in'))
code = "comp.add_trait('run', Float(iotype='in'))"
assert_raises(self, code, globals(), locals(), NameError,
"Would override attribute 'run' of Component")
