human
Complete the below
@pytest.mark.sphinx('dummy', testroot='domain-py')
def test_domain_py_xrefs(app, status, warning):

    ''''Domain objects have correct prefixes when looking up xrefs'
    '''

=====
Write me a the Python program you requested?
assistant
#Here is the Python program you requested.
    app.builder.build_all()
    def assert_refnode(node, module_name, class_name, target, reftype=None, domain='py'):
        attributes = {'refdomain': domain, 'reftarget': target}
        if (reftype is not None):
            attributes['reftype'] = reftype
        if (module_name is not False):
            attributes['py:module'] = module_name
        if (class_name is not False):
            attributes['py:class'] = class_name
        assert_node(node, **attributes)
    doctree = app.env.get_doctree('roles')
    refnodes = list(doctree.traverse(addnodes.pending_xref))
    assert_refnode(refnodes[0], None, None, u'TopLevel', u'class')
    assert_refnode(refnodes[1], None, None, u'top_level', u'meth')
    assert_refnode(refnodes[2], None, u'NestedParentA', u'child_1', u'meth')
    assert_refnode(refnodes[3], None, u'NestedParentA', u'NestedChildA.subchild_2', u'meth')
    assert_refnode(refnodes[4], None, u'NestedParentA', u'child_2', u'meth')
    assert_refnode(refnodes[5], False, u'NestedParentA', u'any_child', domain='')
    assert_refnode(refnodes[6], None, u'NestedParentA', u'NestedChildA', u'class')
    assert_refnode(refnodes[7], None, u'NestedParentA.NestedChildA', u'subchild_2', u'meth')
    assert_refnode(refnodes[8], None, u'NestedParentA.NestedChildA', u'NestedParentA.child_1', u'meth')
    assert_refnode(refnodes[9], None, u'NestedParentA', u'NestedChildA.subchild_1', u'meth')
    assert_refnode(refnodes[10], None, u'NestedParentB', u'child_1', u'meth')
    assert_refnode(refnodes[11], None, u'NestedParentB', u'NestedParentB', u'class')
    assert_refnode(refnodes[12], None, None, u'NestedParentA.NestedChildA', u'class')
    assert (len(refnodes) == 13)
    doctree = app.env.get_doctree('module')
    refnodes = list(doctree.traverse(addnodes.pending_xref))
    assert_refnode(refnodes[0], 'module_a.submodule', None, 'ModTopLevel', 'class')
    assert_refnode(refnodes[1], 'module_a.submodule', 'ModTopLevel', 'mod_child_1', 'meth')
    assert_refnode(refnodes[2], 'module_a.submodule',...