Need more happy path unit test coverage of cc_resizefs

This bug was originally filed in Launchpad as [LP: #1726489](https://bugs.launchpad.net/cloud-init/+bug/1726489)

Launchpad details

affected_projects = []

assignee = None

assignee_name = None

date_closed = None

date_created = 2017-10-23T16:55:10.242414+00:00

date_fix_committed = None

date_fix_released = None

id = 1726489

importance = medium

is_complete = False

lp_url = https://bugs.launchpad.net/cloud-init/+bug/1726489

milestone = 17.2

owner = chad.smith

owner_name = Chad Smith

private = False

status = triaged

submitter = chad.smith

submitter_name = Chad Smith

tags = []

duplicates = []

_Launchpad user **Chad Smith(chad.smith)** wrote on 2017-10-23T16:55:10.242414+00:00_

We need better unit test coverage of resizefs module to specifically catch minimally the full happy path run of cc_resizefs.handle() with and without kernel_commandline params which override root device path by UUID.

Was a problem for cloud-init 17.1 per regression bug https://bugs.launchpad.net/cloud-init/+bug/1725067