fix several regressions from switching to accessibles

also include some basic tests now

Change-Id: Ia07892c03f4d72f5da307a79a9827f926940881d
Reviewed-on: https://forge.frm2.tum.de/review/18539
Tested-by: JenkinsCodeReview <bjoern_pedersen@frm2.tum.de>
Reviewed-by: Enrico Faulhaber <enrico.faulhaber@frm2.tum.de>
Tested-by: Enrico Faulhaber <enrico.faulhaber@frm2.tum.de>

test/test_params.py

@@ -0,0 +1,61 @@
+#  -*- coding: utf-8 -*-
+# *****************************************************************************
+#
+# 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 2 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, write to the Free Software Foundation, Inc.,
+# 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
+#
+# Module authors:
+#   Enrico Faulhaber <enrico.faulhaber@frm2.tum.de>
+#
+# *****************************************************************************
+"""test data types."""
+
+import sys
+sys.path.insert(0, sys.path[0] + '/..')
+
+# no fixtures needed
+import pytest
+
+
+from secop.datatypes import BoolType
+
+from secop.params import Command, Parameter, Override
+
+
+def test_Command():
+    cmd = Command('do_something', [], None)
+    assert cmd.description
+    assert cmd.ctr
+    assert cmd.arguments == []
+    assert cmd.result is None
+
+
+
+def test_Parameter():
+    p1 = Parameter('description1', datatype=BoolType, default=False)
+    p2 = Parameter('description2', datatype=BoolType, default=True)
+    assert p1 != p2
+    assert p1.ctr != p2.ctr
+    with pytest.raises(ValueError):
+        Parameter(None, datatype=float)
+
+def test_Override():
+    p = Parameter('description1', datatype=BoolType, default=False)
+    o = Override(default=True)
+    assert o.ctr != p.ctr
+    q = o.apply(p)
+    assert q.ctr == o.ctr  # override shall be useable to influence the order, hence copy the ctr value
+    assert q.ctr != p.ctr
+    assert o.ctr != p.ctr
+    assert q != p