def test_key_pop():
"""Can pop an unknown"""
from sherpa.astro.io.meta import Meta
store = Meta()
store['key1'] = True
store['key2'] = False
assert store.pop('key') is None
assert store.keys() == ['key1', 'key2']
def test_key_pop():
"""Can pop a known value"""
from sherpa.astro.io.meta import Meta
store = Meta()
store['key1'] = True
store['key2'] = False
assert store.pop('key1')
assert store.keys() == ['key2']