provider/azure: ensure tests work correctly

provider/azure: ensure tests work correctly

Some tests I wrote call StartInstance to
check the parameters passed to createInstance.
The tests don't actually verify that it called
that method successfully, and all validation
is done within the method. Updated the tests
to ensure from outside that the method is called.

https://code.launchpad.net/~axwalk/juju-core/azure-test-ensure-called/+merge/214147

(do not edit description out of merge proposal)

[axw, 2014-04-04 02:01:26]

Please take a look.

[wallyworld, 2014-04-04 04:06:14]

LGTM. I think thst one big test should / could be split up with a common method
to set stuff up, and then in each test a call to start instance for the specific
scenario being tested.

[axw, 2014-04-04 06:15:55]

Please take a look.

[axw, 2014-04-04 06:22:55]

On 2014/04/04 04:06:14, wallyworld wrote:
> LGTM. I think thst one big test should / could be split up with a common
method
> to set stuff up, and then in each test a call to start instance for the
specific
> scenario being tested.

Done.