rework property handling

+ DataType validators are shifted to __call__
+ as_json is moved to export_datatape()
+ new HasProperties Base Mixin for Modules/DataTypes
+ accessibles can be accessed via iterator of a module
+ properties are properly 'derived' and checked, are set with .setPropertyValue

remember: parameters only have properties, so use getPropertyValue()

Change-Id: Iae0273f971aacb00fe6bf05e6a4d24a6d1be881a
Reviewed-on: https://forge.frm2.tum.de/review/20635
Tested-by: JenkinsCodeReview <bjoern_pedersen@frm2.tum.de>
Reviewed-by: Markus Zolliker <markus.zolliker@psi.ch>

test/test_properties.py

@@ -0,0 +1,103 @@
+#  -*- 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."""
+from __future__ import division, print_function
+
+import pytest
+
+from secop.datatypes import IntRange, StringType, FloatRange, ValueType
+from secop.errors import ProgrammingError
+from secop.properties import Property, Properties, HasProperties
+
+
+V_test_Property = [
+    [(StringType(), 'default', 'extname', False, False),
+     dict(default=u'default', extname=u'extname', export=True, mandatory=False)],
+    [(IntRange(), '42', '_extname', False, True),
+     dict(default=42, extname=u'_extname', export=True, mandatory=True)],
+    [(IntRange(), '42', '_extname', True, False),
+     dict(default=42, extname=u'_extname', export=True, mandatory=False)],
+    [(IntRange(), 42, '_extname', True, True),
+     dict(default=42, extname=u'_extname', export=True, mandatory=True)],
+    [(IntRange(), 0, '', True, True),
+     dict(default=0, extname='', export=True, mandatory=True)],
+    [(IntRange(), 0, '', True, False),
+     dict(default=0, extname='', export=True, mandatory=False)],
+    [(IntRange(), 0, '', False, True),
+     dict(default=0, extname='', export=False, mandatory=True)],
+    [(IntRange(), 0, '', False, False),
+     dict(default=0, extname='', export=False, mandatory=False)],
+    [(IntRange(), None, '', False, False),
+     dict(default=None, extname='', export=False, mandatory=True)], # 'normal types + no default -> mandatory
+    [(ValueType(), None, '', False, False),
+     dict(default=None, extname='', export=False, mandatory=False)], # 'special type + no default -> NOT mandatory
+]
+def test_Property():
+    for entry in V_test_Property:
+        args, check = entry
+        p = Property(*args)
+        for k,v in check.items():
+            assert getattr(p, k) == v
+
+def test_Property_basic():
+    with pytest.raises(TypeError):
+        # pylint: disable=no-value-for-parameter
+        Property()
+    with pytest.raises(ValueError):
+        Property(1)
+    Property(IntRange(), '42', 'extname', False, False)
+
+def test_Properties():
+    p = Properties()
+    with pytest.raises(ProgrammingError):
+        p[1] = 2
+    p['a'] = Property(IntRange(), '42', export=True)
+    assert p['a'].default == 42
+    assert p['a'].export is True
+    assert p['a'].extname == u'_a'
+    with pytest.raises(ProgrammingError):
+        p['a'] = 137
+    with pytest.raises(ProgrammingError):
+        del p[1]
+    with pytest.raises(ProgrammingError):
+        del p['a']
+    p['a'] = Property(IntRange(), 0, export=False)
+    assert p['a'].default == 0
+    assert p['a'].export is False
+    assert p['a'].extname == ''
+
+
+class c(HasProperties):
+    properties = {
+        'a' : Property(IntRange(), 1),
+    }
+
+class cl(c):
+    properties = {
+        'a' : Property(IntRange(), 3),
+        'b' : Property(FloatRange(), 3.14),
+    }
+
+def test_HasProperties():
+    o = cl()
+    assert o.properties['a'] == 3
+    assert o.properties['b'] == 3.14