integration test: initial commit of integration test framework

The adds in end-to-end testing of cloud-init. The framework utilizes
LXD and cloud images as a backend to test user-data passed in.
Arbitrary data is then captured from predefined commands specified
by the user. After collection, data verification is completed by
running a series of Python unit tests against the collected data.

Currently only the Ubuntu Trusty, Xenial, Yakkety, and Zesty
releases are supported. Test cases for 50% of the modules is
complete and available.

Additionally a Read the Docs file was created to guide test
writing and execution.

1 files changed, 44 insertions, 0 deletions

diff --git a/tests/cloud_tests/snapshots/base.py b/tests/cloud_tests/snapshots/base.py
new file mode 100644
index 00000000..d715f037
--- /dev/null
+++ b/tests/cloud_tests/snapshots/base.py
@@ -0,0 +1,44 @@
+# This file is part of cloud-init. See LICENSE file for license information.
+
+
+class Snapshot(object):
+    """
+    Base class for snapshots
+    """
+    platform_name = None
+
+    def __init__(self, properties, config):
+        """
+        Set up snapshot
+        """
+        self.properties = properties
+        self.config = config
+
+    def __str__(self):
+        """
+        a brief description of the snapshot
+        """
+        return '-'.join((self.properties['os'], self.properties['release']))
+
+    def launch(self, user_data, meta_data=None, block=True, start=True,
+               use_desc=None):
+        """
+        launch instance
+
+        user_data: user-data for the instance
+        instance_id: instance-id for the instance
+        block: wait until instance is created
+        start: start instance and wait until fully started
+        use_desc: description of snapshot instance use
+
+        return_value: an Instance
+        """
+        raise NotImplementedError
+
+    def destroy(self):
+        """
+        Clean up snapshot data
+        """
+        pass
+
+# vi: ts=4 expandtab