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# This file is part of cloud-init. See LICENSE file for license information.
import collections
import glob
import os
import random
import re
import string
from cloudinit import helpers as c_helpers
from cloudinit import util
from cloudinit.handlers import CONTENT_END, CONTENT_START, cloud_config
from tests.unittests import helpers
SOURCE_PAT = "source*.*yaml"
EXPECTED_PAT = "expected%s.yaml"
TYPES = [dict, str, list, tuple, None, int]
def _old_mergedict(src, cand):
"""
Merge values from C{cand} into C{src}.
If C{src} has a key C{cand} will not override.
Nested dictionaries are merged recursively.
"""
if isinstance(src, dict) and isinstance(cand, dict):
for (k, v) in cand.items():
if k not in src:
src[k] = v
else:
src[k] = _old_mergedict(src[k], v)
return src
def _old_mergemanydict(*args):
out = {}
for a in args:
out = _old_mergedict(out, a)
return out
def _random_str(rand):
base = ""
for _i in range(rand.randint(1, 2 ** 8)):
base += rand.choice(string.ascii_letters + string.digits)
return base
class _NoMoreException(Exception):
pass
def _make_dict(current_depth, max_depth, rand):
if current_depth >= max_depth:
raise _NoMoreException()
if current_depth == 0:
t = dict
else:
t = rand.choice(TYPES)
base = None
if t in [None]:
return base
if t in [dict, list, tuple]:
if t in [dict]:
amount = rand.randint(0, 5)
keys = [_random_str(rand) for _i in range(0, amount)]
base = {}
for k in keys:
try:
base[k] = _make_dict(current_depth + 1, max_depth, rand)
except _NoMoreException:
pass
elif t in [list, tuple]:
base = []
amount = rand.randint(0, 5)
for _i in range(0, amount):
try:
base.append(_make_dict(current_depth + 1, max_depth, rand))
except _NoMoreException:
pass
if t in [tuple]:
base = tuple(base)
elif t in [int]:
base = rand.randint(0, 2 ** 8)
elif t in [str]:
base = _random_str(rand)
return base
def make_dict(max_depth, seed=None):
max_depth = max(1, max_depth)
rand = random.Random(seed)
return _make_dict(0, max_depth, rand)
class TestSimpleRun(helpers.ResourceUsingTestCase):
def _load_merge_files(self):
merge_root = helpers.resourceLocation("merge_sources")
tests = []
source_ids = collections.defaultdict(list)
expected_files = {}
for fn in glob.glob(os.path.join(merge_root, SOURCE_PAT)):
base_fn = os.path.basename(fn)
file_id = re.match(r"source(\d+)\-(\d+)[.]yaml", base_fn)
if not file_id:
raise IOError(
"File %s does not have a numeric identifier" % (fn)
)
file_id = int(file_id.group(1))
source_ids[file_id].append(fn)
expected_fn = os.path.join(merge_root, EXPECTED_PAT % (file_id))
if not os.path.isfile(expected_fn):
raise IOError("No expected file found at %s" % (expected_fn))
expected_files[file_id] = expected_fn
for i in sorted(source_ids.keys()):
source_file_contents = []
for fn in sorted(source_ids[i]):
source_file_contents.append([fn, util.load_file(fn)])
expected = util.load_yaml(util.load_file(expected_files[i]))
entry = [source_file_contents, [expected, expected_files[i]]]
tests.append(entry)
return tests
def test_seed_runs(self):
test_dicts = []
for i in range(1, 10):
base_dicts = []
for j in range(1, 10):
base_dicts.append(make_dict(5, i * j))
test_dicts.append(base_dicts)
for test in test_dicts:
c = _old_mergemanydict(*test)
d = util.mergemanydict(test)
self.assertEqual(c, d)
def test_merge_cc_samples(self):
tests = self._load_merge_files()
paths = c_helpers.Paths({})
cc_handler = cloud_config.CloudConfigPartHandler(paths)
cc_handler.cloud_fn = None
for (payloads, (expected_merge, expected_fn)) in tests:
cc_handler.handle_part(None, CONTENT_START, None, None, None, None)
merging_fns = []
for (fn, contents) in payloads:
cc_handler.handle_part(
None, None, "%s.yaml" % (fn), contents, None, {}
)
merging_fns.append(fn)
merged_buf = cc_handler.cloud_buf
cc_handler.handle_part(None, CONTENT_END, None, None, None, None)
fail_msg = "Equality failure on checking %s with %s: %s != %s"
fail_msg = fail_msg % (
expected_fn,
",".join(merging_fns),
merged_buf,
expected_merge,
)
self.assertEqual(expected_merge, merged_buf, msg=fail_msg)
def test_compat_merges_dict(self):
a = {
"1": "2",
"b": "c",
}
b = {
"b": "e",
}
c = _old_mergedict(a, b)
d = util.mergemanydict([a, b])
self.assertEqual(c, d)
def test_compat_merges_dict2(self):
a = {
"Blah": 1,
"Blah2": 2,
"Blah3": 3,
}
b = {
"Blah": 1,
"Blah2": 2,
"Blah3": [1],
}
c = _old_mergedict(a, b)
d = util.mergemanydict([a, b])
self.assertEqual(c, d)
def test_compat_merges_list(self):
a = {"b": [1, 2, 3]}
b = {"b": [4, 5]}
c = {"b": [6, 7]}
e = _old_mergemanydict(a, b, c)
f = util.mergemanydict([a, b, c])
self.assertEqual(e, f)
def test_compat_merges_str(self):
a = {"b": "hi"}
b = {"b": "howdy"}
c = {"b": "hallo"}
e = _old_mergemanydict(a, b, c)
f = util.mergemanydict([a, b, c])
self.assertEqual(e, f)
def test_compat_merge_sub_dict(self):
a = {
"1": "2",
"b": {
"f": "g",
"e": "c",
"h": "d",
"hh": {
"1": 2,
},
},
}
b = {
"b": {
"e": "c",
"hh": {
"3": 4,
},
}
}
c = _old_mergedict(a, b)
d = util.mergemanydict([a, b])
self.assertEqual(c, d)
def test_compat_merge_sub_dict2(self):
a = {
"1": "2",
"b": {
"f": "g",
},
}
b = {
"b": {
"e": "c",
}
}
c = _old_mergedict(a, b)
d = util.mergemanydict([a, b])
self.assertEqual(c, d)
def test_compat_merge_sub_list(self):
a = {
"1": "2",
"b": {
"f": ["1"],
},
}
b = {
"b": {
"f": [],
}
}
c = _old_mergedict(a, b)
d = util.mergemanydict([a, b])
self.assertEqual(c, d)
# vi: ts=4 expandtab
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