def test_resolver_resolve_expression(patch):
patch.object(Resolver, 'expression')
item = {'$OBJECT': 'expression', 'expression': '==', 'values': []}
result = Resolver.resolve(item, 'data')
Resolver.expression.assert_called_with('data', item['expression'],
item['values'])
assert result == Resolver.expression()
def test_resolver_expression(patch):
patch.object(Resolver, 'values', return_value=[1])
patch.object(Resolver, 'stringify', return_value='1')
result = Resolver.expression('data', '{} == 1', 'values')
Resolver.values.assert_called_with('values', data='data')
Resolver.stringify.assert_called_with(1)
assert result