add minimal CLI test

tests/test_cli.py

@@ -0,0 +1,39 @@
+"""
+Render Diaro data format into HTML - tests
+
+Copyright (C) 2017
+Authors:
+  Tim Waugh <tim@cyberelk.net>
+
+This program is free software; you can redistribute it and/or modify
+it under the terms of the GNU General Public License as published by
+the Free Software Foundation; either version 2 of the License, or
+(at your option) any later version.
+
+This program is distributed in the hope that it will be useful,
+but WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+GNU General Public License for more details.
+
+You should have received a copy of the GNU General Public License
+along with this program; if not, write to the Free Software
+Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
+"""
+
+from diaro_render.cli.main import CLI
+from textwrap import dedent
+from tempfile import NamedTemporaryFile
+
+
+class TestDiaroCLI(object):
+    def test_minimal(self):
+        xml = dedent("""\
+            <data version="2">
+            </data>
+            """)
+
+        with NamedTemporaryFile(mode='w') as fp:
+            fp.write(xml)
+            fp.flush()
+            cli = CLI([fp.name])
+            cli.run()