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from __future__ import absolute_import
from __future__ import print_function
import ruamel.yaml
from ruamel.yaml import YAML
def _compare_events(events1, events2):
assert len(events1) == len(events2), (events1, events2)
for event1, event2 in zip(events1, events2):
assert event1.__class__ == event2.__class__, (event1, event2)
if isinstance(event1, yaml.NodeEvent):
assert event1.anchor == event2.anchor, (event1, event2)
if isinstance(event1, yaml.CollectionStartEvent):
assert event1.tag == event2.tag, (event1, event2)
if isinstance(event1, yaml.ScalarEvent):
if True not in event1.implicit + event2.implicit:
assert event1.tag == event2.tag, (event1, event2)
assert event1.value == event2.value, (event1, event2)
def test_emitter_on_data(data_filename, canonical_filename, verbose=False):
with open(data_filename, 'rb') as fp0:
events = list(YAML().parse(fp0))
output = YAML().emit(events)
if verbose:
print('OUTPUT:')
print(output)
new_events = list(yaml.parse(output))
_compare_events(events, new_events)
test_emitter_on_data.unittest = ['.data', '.canonical']
def test_emitter_on_canonical(canonical_filename, verbose=False):
with open(canonical_filename, 'rb') as fp0:
events = list(YAML().parse(fp0))
for canonical in [False, True]:
output = YAML().emit(events, canonical=canonical)
if verbose:
print('OUTPUT (canonical=%s):' % canonical)
print(output)
new_events = list(yaml.parse(output))
_compare_events(events, new_events)
test_emitter_on_canonical.unittest = ['.canonical']
def test_emitter_styles(data_filename, canonical_filename, verbose=False):
for filename in [data_filename, canonical_filename]:
with open(filename, 'rb') as fp0:
events = list(YAML().parse(fp0))
for flow_style in [False, True]:
for style in ['|', '>', '"', "'", ""]:
styled_events = []
for event in events:
if isinstance(event, yaml.ScalarEvent):
event = yaml.ScalarEvent(
event.anchor, event.tag, event.implicit, event.value, style=style
)
elif isinstance(event, yaml.SequenceStartEvent):
event = yaml.SequenceStartEvent(
event.anchor, event.tag, event.implicit, flow_style=flow_style
)
elif isinstance(event, yaml.MappingStartEvent):
event = yaml.MappingStartEvent(
event.anchor, event.tag, event.implicit, flow_style=flow_style
)
styled_events.append(event)
output = YAML().emit(styled_events)
if verbose:
print(
'OUTPUT (filename=%r, flow_style=%r, style=%r)'
% (filename, flow_style, style)
)
print(output)
new_events = list(YAML().parse(output))
_compare_events(events, new_events)
test_emitter_styles.unittest = ['.data', '.canonical']
class EventsLoader(ruamel.yaml.Loader):
def construct_event(self, node):
if isinstance(node, ruamel.yaml.ScalarNode):
mapping = {}
else:
mapping = self.construct_mapping(node)
class_name = str(node.tag[1:]) + 'Event'
if class_name in [
'AliasEvent',
'ScalarEvent',
'SequenceStartEvent',
'MappingStartEvent',
]:
mapping.setdefault('anchor', None)
if class_name in ['ScalarEvent', 'SequenceStartEvent', 'MappingStartEvent']:
mapping.setdefault('tag', None)
if class_name in ['SequenceStartEvent', 'MappingStartEvent']:
mapping.setdefault('implicit', True)
if class_name == 'ScalarEvent':
mapping.setdefault('implicit', (False, True))
mapping.setdefault('value', "")
value = getattr(yaml, class_name)(**mapping)
return value
# if Loader is not a composite, add this function
# EventsLoader.add_constructor = yaml.constructor.Constructor.add_constructor
EventsLoader.add_constructor(None, EventsLoader.construct_event)
def test_emitter_events(events_filename, verbose=False):
with open(events_filename, 'rb') as fp0:
events = list(YAML().load(fp0, Loader=EventsLoader))
output = YAML().emit(events)
if verbose:
print('OUTPUT:')
print(output)
new_events = list(YAML().parse(output))
_compare_events(events, new_events)
if __name__ == '__main__':
import test_appliance
test_appliance.run(globals())
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