1 files changed, 57 insertions, 0 deletions
diff --git a/python/subunit/_output.py b/python/subunit/_output.py
index 66093bb..e513639 100644
--- a/python/subunit/_output.py
+++ b/python/subunit/_output.py
@@ -13,6 +13,63 @@
 #  license you chose for the specific language governing permissions and
 #  limitations under that license.
 
+from argparse import ArgumentParser
+from sys import stdout
+
+from subunit.v2 import StreamResultToBytes
 
 def output_main():
+    args = parse_arguments()
+    output = get_output_stream_writer()
+    generate_bytestream(args, output)
+
     return 0
+
+
+def parse_arguments(args=None):
+    """Parse arguments from the command line.
+
+    If specified, args must be a list of strings, similar to sys.argv[1:].
+
+    """
+    parser = ArgumentParser(
+        prog='subunit-output',
+        description="A tool to generate a subunit result byte-stream",
+    )
+    sub_parsers = parser.add_subparsers(dest="action")
+
+    parser_start = sub_parsers.add_parser("start", help="Start a test.")
+    parser_start.add_argument("test_id", help="The test id you want to start.")
+
+    parser_pass = sub_parsers.add_parser("pass", help="Pass a test.")
+    parser_pass.add_argument("test_id", help="The test id you want to pass.")
+
+    parser_fail = sub_parsers.add_parser("fail", help="Fail a test.")
+    parser_fail.add_argument("test_id", help="The test id you want to fail.")
+
+    parser_skip = sub_parsers.add_parser("skip", help="Skip a test.")
+    parser_skip.add_argument("test_id", help="The test id you want to skip.")
+
+    return parser.parse_args(args)
+
+
+def translate_command_name(command_name):
+    """Turn the friendly command names we show users on the command line into
+    something subunit understands.
+
+    """
+    return {
+        'start': 'inprogress',
+        'pass': 'success',
+    }.get(command_name, command_name)
+
+
+def get_output_stream_writer():
+    return StreamResultToBytes(stdout)
+
+
+def generate_bytestream(args, output_writer):
+    output_writer.status(
+        test_id=args.test_id,
+        test_status=translate_command_name(args.action)
+        )