Added unittest for arguments.py

Now a basic unittest for arguments.py
is available under tests/test_arguments.py

Change-Id: I5561fbcf595fc9fa45f729405748a05c82bc6253
LAUNCHPAD: https://blueprints.launchpad.net/freezer/+spec/unittest-arguments

.coveragerc

@@ -1,6 +1,7 @@
 # .coveragerc to control coverage.py
 [run]
 branch = True
+omit = freezer/tests/*
 
 [report]
 # Regexes for lines to exclude from consideration

tests/commons.py

@@ -20,6 +20,34 @@ os.environ['OS_AUTH_URL'] = 'testauthurl'
 os.environ['OS_USERNAME'] = 'testusername'
 os.environ['OS_TENANT_NAME'] = 'testtenantename'
 
+
+class FakeArgparse:
+
+    def __init__(self):
+        return None
+
+    def __call__(self, prog='freezerc'):
+        return self.ArgumentParser
+
+    class ArgumentParser:
+
+        def __init__(self, prog='freezerc'):
+            return None
+
+        def __call__(self, *args, **kwargs):
+            return self
+
+        @classmethod
+        def add_argument(self, *args, **kwargs):
+            self.container = 'testcontainer'
+            self.hostname = 'testhostname'
+            return True
+
+        @classmethod
+        def parse_args(self):
+            return self
+
+
 class FakeOpen:
     def __init__(self):
         return None
@@ -266,4 +294,3 @@ class Os:
 
     def exists(self, directory=True):
         return True
-

tests/test_arguments.py

@@ -0,0 +1,20 @@
+#!/usr/bin/env python
+
+from freezer.arguments import  backup_arguments
+import argparse
+from commons import *
+
+import __builtin__
+
+
+class TestArguments:
+
+    def test_arguments(self, monkeypatch):
+
+        fakeargparse = FakeArgparse()
+        fakeargparse = fakeargparse.ArgumentParser()
+
+        monkeypatch.setattr(
+            argparse, 'ArgumentParser', fakeargparse)
+
+        assert backup_arguments() is not Exception or not False

tox.ini

@@ -6,14 +6,23 @@ skipsdist = True
 usedevelop = True
 deps =
     pytest
+    coverage
     flake8
+    pytest-cov
+    pytest-xdist
+
 install_command = pip install -U {opts} {packages}
 setenv = VIRTUAL_ENV={envdir}
-commands = py.test
+commands = py.test -v -n 2
+
+[pytest]
+python_files = test_*.py
+norecursedirs  = .tox
 
 [testenv:pep8]
 commands = flake8 freezer
 
 [flake8]
 show-source = True
-exclude = .venv,.tox,dist,doc,test,*egg
+exclude = .venv,.tox,dist,doc,test,*egg,tests
+