Very basic CLI smoke test

See #8.

tests/cli_test.py

@@ -0,0 +1,12 @@
+from __future__ import unicode_literals
+from __future__ import absolute_import
+from . import unittest
+from fig.cli.main import TopLevelCommand
+
+class CLITestCase(unittest.TestCase):
+    def setUp(self):
+        self.command = TopLevelCommand()
+        self.command.base_dir = 'tests/fixtures/simple-figfile'
+
+    def test_help(self):
+        self.assertRaises(SystemExit, lambda: self.command.dispatch(['-h'], None))

tests/fixtures/simple-figfile/fig.yml

@@ -0,0 +1,2 @@
+simple:
+  image: ubuntu