Remove manual test.

Add automated tests.

requirements.txt

@@ -1 +1,2 @@
+docopt
 pyyaml

tests/test_monitor.py

@@ -0,0 +1,64 @@
+#
+# test_monitor.py
+#
+# Copyright (C) 2018 Kano Computing Ltd.
+# License: http://www.gnu.org/licenses/gpl-2.0.txt GNU GPL v2
+#
+# Tests for the `kano_updater.monitor` module
+#
+
+
+import pytest
+
+
+def run_monitor(mon_timeout, test_cmd):
+    import kano_updater.monitor
+    kano_updater.monitor.MONITOR_TIMEOUT = mon_timeout
+    rc = kano_updater.monitor.run(test_cmd)
+
+    return rc
+
+
+def test_return_code():
+    import os
+    import random
+    # When command returns in time,
+    # Then rc should be the command's rc
+    expected_rc = random.randint(1, 20)
+    rc = run_monitor(10, ["./tests/monitor_stub.py", "5", str(expected_rc)])
+    assert rc == expected_rc
+
+
+def test_return_timeout():
+    import os
+    import random
+    import kano_updater.return_codes
+    # When command returns in time,
+    # Then rc should be HANGED_INDEFINITELY
+    command_rc = random.randint(1, 20)
+    rc = run_monitor(5, ["./tests/monitor_stub.py", "10", str(command_rc)])
+    assert rc == kano_updater.return_codes.RC.HANGED_INDEFINITELY 
+
+
+def test_forking():
+    import os
+    import random
+    # When command takes longer than timeout but forks,
+    # Then rc should be the command's rc
+    expected_rc = random.randint(1, 20)
+    rc = run_monitor(5, ["./tests/monitor_stub.py", "--forking", "10", str(expected_rc)])
+    assert rc == expected_rc
+
+
+def test_signal():
+    import os
+    import random
+    # When command takes longer than timeout but signals,
+    # Then rc should be the command's rc
+    expected_rc = random.randint(1, 20)
+    rc = run_monitor(5, ["./tests/monitor_stub.py", "--signal", "10", str(expected_rc)])
+    assert rc == expected_rc
+
+
+# TBD:
+#   - test gui mode