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# Licensed under the Apache License, Version 2.0 (the "License"); you may
# not use this file except in compliance with the License. You may obtain
# a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
# License for the specific language governing permissions and limitations
# under the License.
import os
import re
import shlex
import subprocess
import testtools
import six
from functional.common import exceptions
COMMON_DIR = os.path.dirname(os.path.abspath(__file__))
FUNCTIONAL_DIR = os.path.normpath(os.path.join(COMMON_DIR, '..'))
ROOT_DIR = os.path.normpath(os.path.join(FUNCTIONAL_DIR, '..'))
EXAMPLE_DIR = os.path.join(ROOT_DIR, 'examples')
def execute(cmd, fail_ok=False, merge_stderr=False):
"""Executes specified command for the given action."""
cmd = shlex.split(cmd.encode('utf-8'))
result = ''
result_err = ''
stdout = subprocess.PIPE
stderr = subprocess.STDOUT if merge_stderr else subprocess.PIPE
proc = subprocess.Popen(cmd, stdout=stdout, stderr=stderr)
result, result_err = proc.communicate()
if not fail_ok and proc.returncode != 0:
raise exceptions.CommandFailed(proc.returncode, cmd, result,
result_err)
return result
class TestCase(testtools.TestCase):
delimiter_line = re.compile('^\+\-[\+\-]+\-\+$')
@classmethod
def openstack(cls, cmd, fail_ok=False):
"""Executes openstackclient command for the given action."""
return execute('openstack ' + cmd, fail_ok=fail_ok)
def assert_table_structure(self, items, field_names):
"""Verify that all items have keys listed in field_names."""
for item in items:
for field in field_names:
self.assertIn(field, item)
def assert_show_fields(self, items, field_names):
"""Verify that all items have keys listed in field_names."""
for item in items:
for key in six.iterkeys(item):
self.assertIn(key, field_names)
def parse_show(self, raw_output):
"""Return list of dicts with item values parsed from cli output."""
items = []
table_ = self.table(raw_output)
for row in table_['values']:
item = {}
item[row[0]] = row[1]
items.append(item)
return items
def parse_listing(self, raw_output):
"""Return list of dicts with basic item parsed from cli output."""
items = []
table_ = self.table(raw_output)
for row in table_['values']:
item = {}
for col_idx, col_key in enumerate(table_['headers']):
item[col_key] = row[col_idx]
items.append(item)
return items
def table(self, output_lines):
"""Parse single table from cli output.
Return dict with list of column names in 'headers' key and
rows in 'values' key.
"""
table_ = {'headers': [], 'values': []}
columns = None
if not isinstance(output_lines, list):
output_lines = output_lines.split('\n')
if not output_lines[-1]:
# skip last line if empty (just newline at the end)
output_lines = output_lines[:-1]
for line in output_lines:
if self.delimiter_line.match(line):
columns = self._table_columns(line)
continue
if '|' not in line:
continue
row = []
for col in columns:
row.append(line[col[0]:col[1]].strip())
if table_['headers']:
table_['values'].append(row)
else:
table_['headers'] = row
return table_
def _table_columns(self, first_table_row):
"""Find column ranges in output line.
Return list of tuples (start,end) for each column
detected by plus (+) characters in delimiter line.
"""
positions = []
start = 1 # there is '+' at 0
while start < len(first_table_row):
end = first_table_row.find('+', start)
if end == -1:
break
positions.append((start, end))
start = end + 1
return positions
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