def test_should_give_priority_to_explicit_properties_rather_than_os_env_variables(
self):
# when
os.environ['bb'] = 'x'
config = Config('dev', {'bb': 1, 'cc': 1})
# then
self.assertEqual(config.resolve('dev'), {'bb': 1, 'cc': 1})
def test_should_use_os_environment_variable_prefix_if_given(self):
# when
os.environ['my_namespace_b'] = 'x'
config = Config('dev', {'b': None},
environment_variables_prefix='my_namespace_')
# then
self.assertEqual(config.resolve('dev'), {'b': 'x'})
def test_should_resolve_from_default_config_given_by_os_env_variable(self):
# when
os.environ['env'] = 'prod'
config = Config('prod', {'bb': 1}).add_configuration('dev', {'bb': 2})
# then
self.assertEqual(config.resolve(), {'bb': 1})
def test_should_resolve_to_os_env_variable_when_property_value_is_None(
self):
# when
os.environ['b'] = 'x'
config = Config('dev', {'a': 1, 'b': None})
# then
self.assertEqual(config.resolve('dev'), {'a': 1, 'b': 'x'})
def test_should_resolve_from_master_config_when_property_is_missing(self):
#when
config = Config('dev', {'a': 1})\
.add_configuration('prod', {})
# then
self.assertEqual(config.resolve('dev'), {'a': 1})
self.assertEqual(config.resolve('prod'), {'a': 1})
def test_should_support_hierarchical_configuration(self):
# when
config = Config('dev', {'a': 1, 'b': 2})\
.add_configuration('prod', {'a': 5, 'b':10, 'c':20})
# then
self.assertEqual(config.resolve('dev'), {'a': 1, 'b': 2})
self.assertEqual(config.resolve('prod'), {'a': 5, 'b': 10, 'c': 20})
def test_should_resolve_from_config_given_by_os_env_variable_with_prefix(
self):
# when
os.environ['bq_env'] = 'prod'
config = Config('prod', {'bb': 1}, environment_variables_prefix='bq_')
# then
self.assertEqual(config.resolve(), {'bb': 1})
def test_should_smartly_resolve_properties_with_placeholders(self):
# when
config = Config('dev', {
'project_id': 'dev_project',
'topic': 'topic/{project_id}/my_topic}'
}) \
.add_configuration('prod',
{
'project_id': 'prod_project',
})
# then
self.assertEqual(config.resolve_property('topic', 'dev'),
'topic/dev_project/my_topic}')
self.assertEqual(config.resolve_property('topic', 'prod'),
'topic/prod_project/my_topic}')
def test_should_raise_Error_when_default_config_requested_but_not_exists(
self):
# when
os.environ['env'] = 'prod'
with self.assertRaises(ValueError):
Config('dev', {}, is_master=False).resolve()
def test_should_raise_Error_when_default_config_requested_but_os_env_variable_not_defined(
self):
#when
if 'env' in os.environ:
del os.environ['env']
with self.assertRaises(ValueError):
Config('dev', {}, is_master=False).resolve()
def test_should_raise_Error_when_required_os_env_variable_is_not_found(
self):
with self.assertRaises(ValueError):
Config('dev', {'no_such_variable': None}).resolve('dev')
def test_should_resolve_explicit_properties_in_simple_config(self):
# when
config = Config('dev', {'a': 1, 'b': '2'})
#expect
self.assertEqual(config.resolve('dev'), {'a': 1, 'b': '2'})
def test_should_raise_Error_when_config_name_not_found(self):
with self.assertRaises(ValueError):
Config('dev', {}).resolve('prod')