Run tests for get_subcommand()

topydo.Command.get_subcommand() is one of the critical parts of topydo
so we really have to be sure that it's functioning properly.

test/TestGetSubCommand.py

+# Topydo - A todo.txt client written in Python.
+# Copyright (C) 2014 - 2015 Bram Schoenmakers <me@bramschoenmakers.nl>
+#
+# 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 3 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, see <http://www.gnu.org/licenses/>.
+
+import unittest
+
+from six import u
+
+from test.TopydoTestCase import TopydoTest
+from topydo.Commands import get_subcommand
+from topydo.commands.AddCommand import AddCommand
+from topydo.commands.DeleteCommand import DeleteCommand
+from topydo.commands.ListCommand import ListCommand
+from topydo.commands.ListProjectCommand import ListProjectCommand
+from topydo.lib.Config import config
+
+class GetSubcommandTest(TopydoTest):
+    def test_normal_cmd(self):
+        args = ["add"]
+        real_cmd, final_args = get_subcommand(args)
+        self.assertTrue(issubclass(real_cmd, AddCommand))
+
+    def test_cmd_help(self):
+        args = ["help", "add"]
+        real_cmd, final_args = get_subcommand(args)
+        self.assertTrue(issubclass(real_cmd, AddCommand))
+        self.assertEqual(final_args, ["help"])
+
+    def test_alias(self):
+        config("test/data/aliases.conf")
+
+        args = ["foo"]
+        real_cmd, final_args = get_subcommand(args)
+        self.assertTrue(issubclass(real_cmd, DeleteCommand))
+        self.assertEqual(final_args, ["-f", "test"])
+
+    def test_default_cmd01(self):
+        args = ["bar"]
+        real_cmd, final_args = get_subcommand(args)
+        self.assertTrue(issubclass(real_cmd, ListCommand))
+        self.assertEqual(final_args, ["bar"])
+
+    def test_default_cmd02(self):
+        args = []
+        real_cmd, final_args = get_subcommand(args)
+        self.assertTrue(issubclass(real_cmd, ListCommand))
+        self.assertEqual(final_args, [])
+
+    def test_alias_default_cmd01(self):
+        config("test/data/aliases.conf", {('topydo', 'default_command'): 'foo'})
+
+        args = ["bar"]
+        real_cmd, final_args = get_subcommand(args)
+        self.assertTrue(issubclass(real_cmd, DeleteCommand))
+        self.assertEqual(final_args, ["-f", "test", "bar"])
+
+    def test_alias_default_cmd02(self):
+        config("test/data/aliases.conf", {('topydo', 'default_command'): 'foo'})
+
+        args = []
+        real_cmd, final_args = get_subcommand(args)
+        self.assertTrue(issubclass(real_cmd, DeleteCommand))
+        self.assertEqual(final_args, ["-f", "test"])
+
+    def test_wrong_alias(self):
+        config("test/data/aliases.conf")
+
+        args = ["baz"]
+        real_cmd, final_args = get_subcommand(args)
+        self.assertEqual(real_cmd, None)
+
+if __name__ == '__main__':
+    unittest.main()

test/data/aliases.conf

+[aliases]
+foo = rm -f test
+baz = FooBar