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# coding: utf-8
"""
testing of anchors and the aliases referring to them
"""
import pytest
from textwrap import dedent
import ruamel.yaml
from roundtrip import round_trip, dedent, round_trip_load, round_trip_dump
def load(s):
return round_trip_load(dedent(s))
def compare(data, s):
assert round_trip_dump(data) == dedent(s)
class TestAnchorsAliases:
def test_anchor_id_renumber(self):
from ruamel.yaml.serializer import Serializer
assert Serializer.ANCHOR_TEMPLATE == 'id%03d'
data = load("""
a: &id002
b: 1
c: 2
d: *id002
""")
compare(data, """
a: &id001
b: 1
c: 2
d: *id001
""")
def test_template_matcher(self):
"""test if id matches the anchor template"""
from ruamel.yaml.serializer import templated_id
assert templated_id(u'id001')
assert templated_id(u'id999')
assert templated_id(u'id1000')
assert templated_id(u'id0001')
assert templated_id(u'id0000')
assert not templated_id(u'id02')
assert not templated_id(u'id000')
assert not templated_id(u'x000')
#def test_re_matcher(self):
# import re
# assert re.compile(u'id(?!000)\\d{3,}').match('id001')
# assert not re.compile(u'id(?!000\\d*)\\d{3,}').match('id000')
# assert re.compile(u'id(?!000$)\\d{3,}').match('id0001')
def test_anchor_assigned(self):
from ruamel.yaml.comments import CommentedMap
data = load("""
a: &id002
b: 1
c: 2
d: *id002
e: &etemplate
b: 1
c: 2
f: *etemplate
""")
d = data['d']
assert isinstance(d, CommentedMap)
assert d.yaml_anchor() is None # got dropped as it matches pattern
e = data['e']
assert isinstance(e, CommentedMap)
assert e.yaml_anchor().value == 'etemplate'
assert e.yaml_anchor().always_dump is False
#@pytest.mark.xfail
def test_anchor_id_retained(self):
data = load("""
a: &id002
b: 1
c: 2
d: *id002
e: &etemplate
b: 1
c: 2
f: *etemplate
""")
compare(data, """
a: &id001
b: 1
c: 2
d: *id001
e: &etemplate
b: 1
c: 2
f: *etemplate
""")
def test_alias_before_anchor(self):
from ruamel.yaml.composer import ComposerError
with pytest.raises(ComposerError):
data = load("""
d: *id002
a: &id002
b: 1
c: 2
""")
def test_anchor_on_sequence(self):
# as reported by Bjorn Stabell
# https://bitbucket.org/ruamel/yaml/issue/7/anchor-names-not-preserved
from ruamel.yaml.comments import CommentedSeq
data = load("""
nut1: &alice
- 1
- 2
nut2: &blake
- some data
- *alice
nut3:
- *blake
- *alice
""")
l = data['nut1']
assert isinstance(l, CommentedSeq)
assert l.yaml_anchor() is not None
assert l.yaml_anchor().value == 'alice'
merge_yaml = dedent("""
- &CENTER {x: 1, y: 2}
- &LEFT {x: 0, y: 2}
- &BIG {r: 10}
- &SMALL {r: 1}
# All the following maps are equal:
# Explicit keys
- x: 1
y: 2
r: 10
label: center/big
# Merge one map
- <<: *CENTER
r: 10
label: center/big
# Merge multiple maps
- <<: [*CENTER, *BIG]
label: center/big
# Override
- <<: [*BIG, *LEFT, *SMALL]
x: 1
label: center/big
""")
def test_merge_00(self):
data = load(self.merge_yaml)
d = data[4]
ok = True
for k in d:
for o in [5, 6, 7]:
if d.get(k) != data[o].get(k):
ok = False
print('key', k, d.get(k), data[o].get(k))
assert ok
def test_merge_accessible(self):
from ruamel.yaml.comments import CommentedMap, merge_attrib
data = load("""
k: &level_2 { a: 1, b2 }
l: &level_1 { a: 10, c: 3 }
m:
<< : *level_1
c: 30
d: 40
""")
d = data['m']
assert isinstance(d, CommentedMap)
assert hasattr(d, merge_attrib)
def test_merge_01(self):
data = load(self.merge_yaml)
compare(data, self.merge_yaml)
def test_merge_nested(self):
yaml = '''
a:
<<: &content
1: plugh
2: plover
0: xyzzy
b:
<<: *content
'''
data = round_trip(yaml)
def test_merge_nested_with_sequence(self):
yaml = '''
a:
<<: &content
<<: &y2
1: plugh
2: plover
0: xyzzy
b:
<<: [*content, *y2]
'''
data = round_trip(yaml)
def test_add_anchor(self):
from ruamel.yaml.comments import CommentedMap
data = CommentedMap()
data_a = CommentedMap()
data['a'] = data_a
data_a['c'] = 3
data['b'] = 2
data.yaml_set_anchor('klm', always_dump=True)
data['a'].yaml_set_anchor('xyz', always_dump=True)
compare(data, """
&klm
a: &xyz
c: 3
b: 2
""")
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