1 files changed, 71 insertions, 2 deletions
diff --git a/tests/test_command.py b/tests/test_command.py
index f5b824c..eed6e1f 100644
--- a/tests/test_command.py
+++ b/tests/test_command.py
@@ -1,10 +1,79 @@
+import contextlib
+import io
+import sys
 import unittest
 
-from hazwaz import command
+import hazwaz
+
+
+class MyCommand(hazwaz.MainCommand):
+    """
+    A command that does things.
+
+    This is a command, but honestly it doesn't really do anything.
+    """
+    commands = ()
+
+    def add_arguments(self, parser):
+        super().add_arguments(parser)
+        parser.add_argument(
+            "--foo",
+            help="foobar things"
+        )
 
 
 class testCommand(unittest.TestCase):
-    pass
+    def _run_with_argv(self, cmd, argv):
+        stream = {
+            'stdout': io.StringIO(),
+            'stderr': io.StringIO(),
+        }
+        old_argv = sys.argv
+        sys.argv = argv
+        with contextlib.redirect_stdout(stream['stdout']):
+            with contextlib.redirect_stderr(stream['stderr']):
+                cmd.main()
+        sys.argv = old_argv
+        return stream
+
+    def test_description(self):
+        cmd = MyCommand()
+        self.assertEqual(
+            cmd.parser.description,
+            "A command that does things."
+        )
+        self.assertEqual(
+            cmd.parser.epilog,
+            "This is a command, but honestly it doesn't really do anything."
+        )
+
+    def test_description_none(self):
+        class NoHelpCommand(hazwaz.MainCommand):
+            pass
+
+        cmd = NoHelpCommand()
+        self.assertEqual(cmd.parser.description, None)
+
+    def test_description_empty(self):
+        class NoHelpCommand(hazwaz.MainCommand):
+            """
+            """
+
+        cmd = NoHelpCommand()
+        self.assertEqual(cmd.parser.description, '')
+
+    def test_arguments(self):
+        cmd = MyCommand()
+        cmd_help = cmd.parser.format_help()
+        self.assertIn("--verbose", cmd_help)
+        self.assertIn("--foo", cmd_help)
+
+    def test_run(self):
+        cmd = MyCommand()
+        cmd_help = cmd.parser.format_help()
+        stream = self._run_with_argv(cmd, ["mycommand"])
+        self.assertEqual(stream["stdout"].getvalue(), cmd_help)
+
 
 
 if __name__ == '__main__':