Adrian Vladu fd2c15bef3 Fix templating when data is empty
Fixes base_template.load and remove_template_definition which fail when
the userdata is empty / None or when the userdata has only one line.

Change-Id: I2ba0e16489049be390b2c9bc1fdf1e1059f54eb1
2020-01-23 13:43:40 +02:00

95 lines
3.2 KiB
Python

# Copyright 2019 Cloudbase Solutions Srl
#
# 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 ddt
import unittest
try:
import unittest.mock as mock
except ImportError:
import mock
from cloudbaseinit.utils.template_engine.jinja2_template import (
Jinja2TemplateEngine)
@ddt.ddt
class TestJinja2TemplateEngine(unittest.TestCase):
@mock.patch('cloudbaseinit.utils.template_engine.base_template'
'.BaseTemplateEngine.remove_template_definition')
def _test_jinja_render_template(self, mock_remove_header,
fake_instance_data, expected_result,
fake_template = b'{{v1.local_hostname}}'):
mock_remove_header.return_value = fake_template
output = Jinja2TemplateEngine().render(fake_instance_data,
fake_template)
self.assertEqual(expected_result, output)
def test_jinja_render_template(self):
fake_instance_data = {
'v1': {
'local_hostname': 'fake_hostname'
}
}
expected_result = b'fake_hostname'
self._test_jinja_render_template(
fake_instance_data=fake_instance_data,
expected_result=expected_result)
def test_jinja_render_template_missing_variable(self):
fake_instance_data = {
'v1': {
'localhostname': 'fake_hostname'
}
}
expected_result = b'CI_MISSING_JINJA_VAR/local_hostname'
self._test_jinja_render_template(
fake_instance_data=fake_instance_data,
expected_result=expected_result)
def test_jinja_render_template_multiple_variables(self):
fake_instance_data = {
'v1': {
'localhostname': 'fake_hostname'
},
'ds': {
'meta_data': {
'hostname': 'fake_hostname'
},
'meta-data': {
'hostname': 'fake_hostname'
}
}
}
fake_template = b'{{ds.meta_data.hostname}}'
expected_result = b'fake_hostname'
self._test_jinja_render_template(
fake_instance_data=fake_instance_data,
expected_result=expected_result,
fake_template=fake_template)
@ddt.data((b'', None),
(None, None),
(b'## template:jinja \n#ps1 \nmkdir', True),
(b'## template:jinja test', None),
(b'## template:jinjanone \ntest', None))
@ddt.unpack
def test_load_template_definition(self, userdata, expected_output):
output = Jinja2TemplateEngine().load(userdata)
self.assertEqual(expected_output, output)