def array(factory, vals):
'''Decode string/value as list
array :: (a -> Result e b) -> List a -> Result e (List b)
>>> from pydecoder.primitives import to_int
>>> array(to_int, [1, 2, 3])
Result(status='Ok', value=[1, 2, 3])
>>> array(to_int, None)
Result(status='Error', value="'None' isn't list or tuple.")
'''
if not isinstance(vals, (list, tuple)):
return error(u('\'{}\' isn\'t list or tuple.').format(vals))
result = []
for val in vals:
rv = factory(val)
if is_error(rv):
return rv
result.append(value(rv))
return ok(result)
def test_and_then_run_next_decoder():
def dec(val):
return ok(val - 1)
rv = and_then(dec, to_int, 5)
assert is_ok(rv)
assert value(rv) == 4
def test_pipe_pass_value_trough_pipeline():
def inc(val):
return ok(val + 1)
rv = pipe([
inc,
inc,
inc,
], 1)
assert is_ok(rv)
assert value(rv) == 4
def test_to_string_returns_ok_result(val):
rv = to_string(val)
assert is_ok(rv)
assert value(rv) == val
def test_to_bool_return_false_in_decoded_result(val):
rv = to_bool(val)
assert is_ok(rv)
assert not value(rv)
def test_to_string_return_decoded_result():
rv = to_string('foo')
assert is_ok(rv)
assert value(rv) == 'foo'
def test_to_float_return_parsed_result():
rv = to_float('1.5')
assert is_ok(rv)
assert value(rv) == 1.5
def test_to_int_return_parsed_result():
rv = to_int('10')
assert is_ok(rv)
assert value(rv) == 10
def test_none_return_none_in_decoded_result(val):
rv = null(val)
assert is_ok(rv)
assert value(rv) is None
def test_dmap_apply_function_to_decoded_val():
rv = dmap(lambda x: x + 1, to_int, '1')
assert is_ok(rv)
assert value(rv) == 2
def test_optional_return_default_value_in_result_if_value_isnt_found(data):
rv = optional('y', ok, 'foo', getter(data)) # pylint: disable=no-value-for-parameter
assert is_ok(rv)
assert value(rv) == 'foo'
def test_optional_return_decoded_value_in_result(data):
rv = optional('field', ok, 'foo', getter(data)) # pylint: disable=no-value-for-parameter
assert is_ok(rv)
assert equal(value(rv), data['field'])
def test_hardcoded_return_ok_result():
rv = hardcoded(2.5, None)
assert is_ok(rv)
assert value(rv) == 2.5
def test_required_return_ok_result(data):
rv = required('field', ok, getter(data)) # pylint: disable=no-value-for-parameter
assert is_ok(rv)
assert equal(value(rv), data['field'])