master trunk of gnowsys-studio

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diff --git a/gstudio/tests/comparison.py b/gstudio/tests/comparison.py
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+# Copyright (c) 2011,  2012 Free Software Foundation
+
+#     This program is free software: you can redistribute it and/or modify
+#     it under the terms of the GNU Affero General Public License as
+#     published by the Free Software Foundation, either version 3 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 Affero General Public License for more details.
+
+#     You should have received a copy of the GNU Affero General Public License
+#     along with this program.  If not, see <http://www.gnu.org/licenses/>.
+
+
+# This project incorporates work covered by the following copyright and permission notice:  
+
+#    Copyright (c) 2009, Julien Fache
+#    All rights reserved.
+
+#    Redistribution and use in source and binary forms, with or without
+#    modification, are permitted provided that the following conditions
+#    are met:
+
+#    * Redistributions of source code must retain the above copyright
+#      notice, this list of conditions and the following disclaimer.
+#    * Redistributions in binary form must reproduce the above copyright
+#      notice, this list of conditions and the following disclaimer in
+#      the documentation and/or other materials provided with the
+#      distribution.
+#    * Neither the name of the author nor the names of other
+#      contributors may be used to endorse or promote products derived
+#      from this software without specific prior written permission.
+
+#    THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+#    "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+#    LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
+#    FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
+#    COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
+#    INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
+#    (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
+#    SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+#    HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
+#    STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+#    ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
+#    OF THE POSSIBILITY OF SUCH DAMAGE.
+
+# Copyright (c) 2011,  2012 Free Software Foundation
+
+#     This program is free software: you can redistribute it and/or modify
+#     it under the terms of the GNU Affero General Public License as
+#     published by the Free Software Foundation, either version 3 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 Affero General Public License for more details.
+
+#     You should have received a copy of the GNU Affero General Public License
+#     along with this program.  If not, see <http://www.gnu.org/licenses/>.
+
+
+
+"""Test cases for Gstudio's comparison"""
+from django.test import TestCase
+
+from gstudio.models import Nodetype
+from gstudio.comparison import pearson_score
+from gstudio.comparison import VectorBuilder
+from gstudio.comparison import ClusteredModel
+
+
+class ComparisonTestCase(TestCase):
+    """Test cases for comparison tools"""
+
+    def test_pearson_score(self):
+        self.assertEquals(pearson_score([42], [42]), 0.0)
+        self.assertEquals(pearson_score([0, 1, 2], [0, 1, 2]), 0.0)
+        self.assertEquals(pearson_score([0, 1, 3], [0, 1, 2]),
+                          0.051316701949486232)
+        self.assertEquals(pearson_score([0, 1, 2], [0, 1, 3]),
+                          0.051316701949486232)
+
+    def test_clustered_model(self):
+        params = {'title': 'My nodetype 1', 'content': 'My content 1',
+                  'tags': 'gstudio, test', 'slug': 'my-nodetype-1'}
+        Nodetype.objects.create(**params)
+        params = {'title': 'My nodetype 2', 'content': 'My content 2',
+                  'tags': 'gstudio, test', 'slug': 'my-nodetype-2'}
+        Nodetype.objects.create(**params)
+        cm = ClusteredModel(Nodetype.objects.all())
+        self.assertEquals(cm.dataset().values(), ['1', '2'])
+        cm = ClusteredModel(Nodetype.objects.all(),
+                            ['title', 'excerpt', 'content'])
+        self.assertEquals(cm.dataset().values(), ['My nodetype 1  My content 1',
+                                                  'My nodetype 2  My content 2'])
+
+    def test_vector_builder(self):
+        vectors = VectorBuilder(Nodetype.objects.all(),
+                                ['title', 'excerpt', 'content'])
+        params = {'title': 'My nodetype 1', 'content':
+                  'This is my first content',
+                  'tags': 'gstudio, test', 'slug': 'my-nodetype-1'}
+        Nodetype.objects.create(**params)
+        params = {'title': 'My nodetype 2', 'content':
+                  'My second nodetype',
+                  'tags': 'gstudio, test', 'slug': 'my-nodetype-2'}
+        Nodetype.objects.create(**params)
+        columns, dataset = vectors()
+        self.assertEquals(columns, ['content', 'This', 'my', 'is', '1',
+                                    'second', '2', 'first'])
+        self.assertEquals(dataset.values(), [[1, 1, 1, 1, 1, 0, 0, 1],
+                                             [0, 0, 0, 0, 0, 1, 1, 0]])