Change how cli.py works to make it easier to test (wrap the underlyin…

…g internal function)

anaconda_project/cli.py

@@ -9,4 +9,12 @@
 
 # the point of this file is to make the internal main() into a public
 # entry point.
-from anaconda_project.internal.cli.main import main  # noqa: F401
+import anaconda_project.internal.cli.main as cli_main
+
+
+def main():
+    """anaconda-project command line tool Conda-style entry point.
+
+    Conda expects us to take no args and return an exit code.
+    """
+    return cli_main.main()

anaconda_project/test/test_cli.py

@@ -0,0 +1,22 @@
+# -*- coding: utf-8 -*-
+# ----------------------------------------------------------------------------
+# Copyright © 2016, Continuum Analytics, Inc. All rights reserved.
+#
+# The full license is in the file LICENSE.txt, distributed with this software.
+# ----------------------------------------------------------------------------
+from __future__ import absolute_import, print_function
+
+import anaconda_project.cli as cli
+
+
+def test_main(monkeypatch):
+    result = {}
+
+    def mock_main(*args, **kwargs):
+        result['args'] = args
+        result['kwargs'] = kwargs
+
+    monkeypatch.setattr('anaconda_project.internal.cli.main.main', mock_main)
+    cli.main()
+
+    assert dict(args=(), kwargs={}) == result