add jinja helper to access parameter variables

Author: rande

ioc/extra/jinja2/helper.py

@@ -0,0 +1,11 @@
+__author__ = 'rande'
+
+class JinjaHelper(object):
+    def __init__(self, container):
+        self.container = container
+
+    def get_parameter(self, name, default=None):
+        if self.container.parameters.has(name):
+            return self.container.parameters.get(name)
+
+        return default

tests/ioc/extra/jinja/__init__.py

@@ -0,0 +1,14 @@
+#
+# Copyright 2014 Thomas Rabaix <[email protected]>
+#
+# 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.

tests/ioc/extra/jinja/test_helper.py

@@ -0,0 +1,30 @@
+#
+# Copyright 2014 Thomas Rabaix <[email protected]>
+#
+# 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 unittest
+
+from ioc.extra.jinja2.helper import JinjaHelper
+from ioc.component import Container, ParameterHolder
+class JinjaHelperTest(unittest.TestCase):
+    def test_get_parameter(self):
+
+        container = Container()
+        container.parameters.set('hello', 'world')
+
+        helper = JinjaHelper(container)
+
+        self.assertEquals('world', helper.get_parameter('hello'))
+        self.assertEquals(None, helper.get_parameter('fake'))
+        self.assertEquals('for real', helper.get_parameter('fake', 'for real'))