import mkdocs.config

# 1. OK
conf = mkdocs.config.Config(mkdocs.config.DEFAULT_SCHEMA)
conf.load_dict({'site_name': 'foo'})
conf.validate()
assert conf['mdx_configs'].get('toc') == None

# 2. OK
conf = mkdocs.config.Config(mkdocs.config.DEFAULT_SCHEMA)
conf.load_dict({'site_name': 'foo', 'markdown_extensions': [{"toc": {"permalink": "aaa"}}]})
conf.validate()
assert conf['mdx_configs'].get('toc') == {'permalink': 'aaa'}

# 3. Identical to 1 but not OK.
conf = mkdocs.config.Config(mkdocs.config.DEFAULT_SCHEMA)
conf.load_dict({'site_name': 'foo'})
conf.validate()
assert conf['mdx_configs'].get('toc') == None
# fails, actually is {'permalink': 'aaa'}