def test_variable_subst_handles_escaped_chars():
items = {'a': '${path}'}
repl = {'path': 'D\\'}
reg = Registry()
config = reg.add(items).add(repl)
assert config.resolve()['a'] == repl['path']
def test_registry_updated_with_new_dict_adds_those_items():
items = {'a': 10}
reg = Registry().add(items)
newitems = {'a': 20, 'b': 100}
reg.add(newitems)
assert reg.resolve()['a'] == newitems['a']
assert reg.resolve()['b'] == newitems['b']
def test_attribute_names_are_resolved_with_variables():
public_args = {'password': '******'}
overrides = {'private_password': '******'}
registry = Registry()
config = registry.add(public_args).add(overrides).resolve()
assert config.password == 'a good strong password'
def test_expression_cannot_be_indirectly_recursive():
args = {
'foo': '${bar}',
'bar': '${bing}',
'bing': '${baz}',
'baz': '${foo}'
}
cfg = Registry().add(args)
with pytest.raises(Exception):
cfg.resolve()
def test_substitutions_with_escaped_separator_resolves_to_correct_key():
args = {
'foo': {
'bar\\.bing': 'hello'
},
'baz': {
'fart': '${foo.bar\\.bing}'
}
}
assert Registry().add(args).resolve()['baz.fart'] == 'hello'
def test_no_variables_gives_literal_results():
args = {'a': '10', 'b': '20'}
a = Registry().add(args).resolve()
assert a['a'] == '10'
def test_handlers_are_processed_in_order_of_addition():
first = {'a': 100}
second = {'a': 200}
assert Registry().add(first).add(second).resolve()['a'] == 200
def test_expression_cannot_be_reflective():
args = {'foo': '${bar}', 'bar': '${foo}'}
cfg = Registry().add(args)
with pytest.raises(Exception):
cfg.resolve()
def test_substituted_value_can_be_nonstring_and_is_converted_to_string():
args = {'foo': 10, 'bar': '${foo}'}
assert Registry().add(args).resolve()['bar'] == str(args['foo'])
def test_value_can_be_unset():
args = {'foo': None}
assert Registry().add(args).resolve()['foo'] == None
def test_variable_with_unknown_key_remains_unchanged():
args = {'foo': '${bar}'}
assert Registry().add(args).resolve()['foo'] == '${bar}'
def test_variables_are_substituted_from_earlier_handlers():
first = {'a': 'hello'}
second = {'b': '${a}'}
assert Registry().add(first).add(second).resolve()['b'] == first['a']
def test_keys_in_later_handlers_are_added():
first = {'a': 100}
second = {'b': 200}
assert Registry().add(first).add(second).resolve()['b'] == 200
def test_resolved_registry_is_a_dictionary():
first = {'a': {'b': '${a.d}', 'c': '1'}}
second = {'a': {'c': '${a.b}_here', 'd': 'hello'}}
cfg = Registry().add(first).add(second).resolve()
assert cfg['a.b'] == 'hello'
assert cfg['a.c'] == 'hello_here'
def test_nest_dict_is_updated_by_added_handler():
first = {'a': {'b': 10, 'c': 20}}
second = {'a': {'c': 200, 'd': 1000}}
assert Registry().add(first).add(second).resolve()['a.b'] == 10
assert Registry().add(first).add(second).resolve()['a.c'] == 200
assert Registry().add(first).add(second).resolve()['a.d'] == 1000
def test_nest_dict_can_be_a_list():
args = {'foo': {'baz': [5, 50]}, 'bar': '${foo}'}
assert Registry().add(args).resolve()['foo.baz'][1] == 50
def test_substitutions_are_resolved_from_nested_keys():
args = {'foo': {'bar': 'hello'}, 'bing': '${foo.bar}'}
assert Registry().add(args).resolve()['bing'] == args['foo']['bar']
def test_simple_element_substitution_replaces_whole_expression():
args = {'foo': 'hello', 'bar': '${foo}'}
cfg = Registry().add(args).resolve()
assert cfg['bar'] == args['foo']
def test_variables_can_refer_to_keys_in_later_handlers():
first = {'a': '${b}'}
second = {'b': 'hello'}
assert Registry().add(first).add(second).resolve()['a'] == second['b']
def test_expression_can_be_further_expression():
args = {'foo': '${bar}', 'bar': '${bing}', 'bing': 'hello'}
cfg = Registry().add(args).resolve()
assert cfg['foo'] == args['bing']
def test_value_can_contain_multiple_substitutions():
args = {'foo': 'The ${bar} is ${bing}ed', 'bar': 'test', 'bing': 'pass'}
assert Registry().add(args).resolve()['foo'] == 'The test is passed'
def test_using_keys_containing_key_separation_char_appear_as_keys():
items = {'foo.bar': 100}
reg = Registry().add(items)
assert reg.resolve()['foo']['bar'] == items['foo.bar']
def test_nonstring_values_remain_unchanged():
args = {'foo': 100}
assert Registry().add(args).resolve()['foo'] == 100
def test_keys_sent_with_separation_char_are_retrieved_with_usual_selection():
items = {'a': {'foo.bar': 100}}
reg = Registry().add(items)
assert reg.resolve()['a']['foo.bar'] == items['a']['foo.bar']
assert reg.resolve().a.foo.bar == items['a']['foo.bar']
def test_all_items_in_a_list_are_resolved():
args = {'foo': 'hello', 'bar': '10', 'bing': ['Yes', '${bar}', '${foo}']}
cfg = Registry().add(args).resolve()
assert cfg['bing'][1] == args['bar']
assert cfg['bing'][2] == args['foo']
assert reg.resolve()['a'] == newitems['a']
assert reg.resolve()['b'] == newitems['b']
def test_using_keys_containing_key_separation_char_appear_as_keys():
items = {'foo.bar': 100}
reg = Registry().add(items)
assert reg.resolve()['foo']['bar'] == items['foo.bar']
def test_keys_sent_with_separation_char_are_retrieved_with_usual_selection():
items = {'a': {'foo.bar': 100}}
reg = Registry().add(items)
assert reg.resolve()['a']['foo.bar'] == items['a']['foo.bar']
assert reg.resolve().a.foo.bar == items['a']['foo.bar']
if __name__ == '__main__':
pytest.main()
import json
args = {'url': '${remotes.endpoint}'}
overrides = json.loads('''
{ "remotes": {
"endpoint": "http://nowhere"
} } ''')
cfg = Registry().add(args).add(overrides).resolve()
print(cfg['url'])