def assert_pex_vars_hermetic():
v = Variables()
assert os.environ == v.copy()
existing = os.environ.get('TEST')
expected = (existing or '') + 'different'
assert expected != existing
with environment_as(TEST=expected):
assert expected != v.copy().get('TEST')
def assert_pex_vars_hermetic():
# type: () -> None
v = Variables()
assert os.environ.copy() == v.copy()
existing = os.environ.get("TEST")
expected = (existing or "") + "different"
assert expected != existing
with environment_as(TEST=expected):
assert expected != v.copy().get("TEST")
def test_pex_vars_set():
v = Variables(environ={})
v.set('HELLO', '42')
assert v._get_int('HELLO') == 42
v.delete('HELLO')
assert v._get_int('HELLO') is None
assert {} == v.copy()
def test_pex_vars_set():
v = Variables(environ={})
assert v._get_int('HELLO') is None
v.set('HELLO', '42')
assert v._get_int('HELLO') == 42
assert {'HELLO': '42'} == v.copy()
