def test_deepcopy_expression():
deepcopy(parse_expression('1'))
deepcopy(parse_expression('1 > 2'))
deepcopy(parse_expression('1 & 2'))
deepcopy(parse_expression('1 or 2'))
deepcopy(parse_expression('not 1'))
deepcopy(parse_expression('~x'))
deepcopy(parse_expression('2 if x else 3'))
def test_iter_names():
expr = 'a if b in c else d > e'
a = parse_expression(expr)
b = Expr.parse(expr) # alias
assert sorted(_iter_names(a)) == ['a', 'b', 'c', 'd', 'e']
assert sorted(_iter_names(b)) == ['a', 'b', 'c', 'd', 'e']
with pytest.raises(RuntimeError):
# don't directly instantiate
Expr()
def test_action_menu(qapp):
ACTIONS = {
'add_one': {
'description': 'Add one',
'action': lambda x: x.append(1),
'enable_when': parse_expression('count == 0'),
}
}
menu = QtActionContextMenu(ACTIONS)
menu.update_from_context({'count': 0, 'is_ready': True})
assert menu._get_action('add_one').isEnabled()
assert menu._get_action('add_one').isVisible()
CONTEXT_KEYS = {
'count': lambda x: len(x),
'is_ready': lambda x: True,
}
some_object = [42]
ctx = {k: v(some_object) for k, v in CONTEXT_KEYS.items()}
menu.update_from_context(ctx)
assert not menu._get_action('add_one').isEnabled()
def test_bad_serdes(expr):
with pytest.raises(SyntaxError):
parse_expression(expr)
def test_serdes(expr):
assert str(parse_expression(expr)) == expr