--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/test/unittest_selectors.py	Mon Feb 16 16:24:24 2009 +0100
@@ -0,0 +1,80 @@
+"""unit tests for selectors mechanism
+
+:organization: Logilab
+:copyright: 2001-2009 LOGILAB S.A. (Paris, FRANCE), all rights reserved.
+:contact: http://www.logilab.fr/ -- mailto:contact@logilab.fr
+"""
+
+from logilab.common.testlib import TestCase, unittest_main
+
+from cubicweb.vregistry import Selector, AndSelector, OrSelector
+
+class _1_(Selector):
+    def __call__(self, *args, **kwargs):
+        return 1
+
+class _0_(Selector):
+    def __call__(self, *args, **kwargs):
+        return 0
+
+def _2_(*args, **kwargs):
+    return 2
+
+
+class SelectorsTC(TestCase):
+    def test_basic_and(self):
+        selector = _1_() & _1_()
+        self.assertEquals(selector(None), 2)
+        selector = _1_() & _0_()
+        self.assertEquals(selector(None), 0)
+        selector = _0_() & _1_()
+        self.assertEquals(selector(None), 0)
+
+    def test_basic_or(self):
+        selector = _1_() | _1_()
+        self.assertEquals(selector(None), 1)
+        selector = _1_() | _0_()
+        self.assertEquals(selector(None), 1)
+        selector = _0_() | _1_()
+        self.assertEquals(selector(None), 1)
+        selector = _0_() | _0_()
+        self.assertEquals(selector(None), 0)
+
+    def test_selector_and_function(self):
+        selector = _1_() & _2_
+        self.assertEquals(selector(None), 3)
+        selector = _2_ & _1_()
+        self.assertEquals(selector(None), 3)
+        
+    def test_three_and(self):
+        selector = _1_() & _1_() & _1_()
+        self.assertEquals(selector(None), 3)
+        selector = _1_() & _0_() & _1_()
+        self.assertEquals(selector(None), 0)
+        selector = _0_() & _1_() & _1_()
+        self.assertEquals(selector(None), 0)
+
+    def test_three_or(self):
+        selector = _1_() | _1_() | _1_()
+        self.assertEquals(selector(None), 1)
+        selector = _1_() | _0_() | _1_()
+        self.assertEquals(selector(None), 1)
+        selector = _0_() | _1_() | _1_()
+        self.assertEquals(selector(None), 1)
+        selector = _0_() | _0_() | _0_()
+        self.assertEquals(selector(None), 0)
+
+    def test_composition(self):
+        selector = (_1_() & _1_()) & (_1_() & _1_())
+        self.failUnless(isinstance(selector, AndSelector))
+        self.assertEquals(len(selector.selectors), 4)
+        self.assertEquals(selector(None), 4)
+        selector = (_1_() & _0_()) | (_1_() & _1_())
+        self.failUnless(isinstance(selector, OrSelector))
+        self.assertEquals(len(selector.selectors), 2)
+        self.assertEquals(selector(None), 2)
+
+
+if __name__ == '__main__':
+    unittest_main()
+