test/unittest_selectors.py
author sylvain.thenault@logilab.fr
Tue, 17 Feb 2009 23:43:08 +0100
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"""unit tests for selectors mechanism
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:organization: Logilab
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:copyright: 2001-2009 LOGILAB S.A. (Paris, FRANCE), all rights reserved.
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:contact: http://www.logilab.fr/ -- mailto:contact@logilab.fr
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"""
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from logilab.common.testlib import TestCase, unittest_main
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from cubicweb.vregistry import Selector, AndSelector, OrSelector
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class _1_(Selector):
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    def __call__(self, *args, **kwargs):
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        return 1
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class _0_(Selector):
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    def __call__(self, *args, **kwargs):
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        return 0
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def _2_(*args, **kwargs):
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    return 2
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class SelectorsTC(TestCase):
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    def test_basic_and(self):
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        selector = _1_() & _1_()
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        self.assertEquals(selector(None), 2)
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        selector = _1_() & _0_()
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        self.assertEquals(selector(None), 0)
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        selector = _0_() & _1_()
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        self.assertEquals(selector(None), 0)
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    def test_basic_or(self):
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        selector = _1_() | _1_()
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        self.assertEquals(selector(None), 1)
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        selector = _1_() | _0_()
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        self.assertEquals(selector(None), 1)
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        selector = _0_() | _1_()
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        self.assertEquals(selector(None), 1)
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        selector = _0_() | _0_()
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        self.assertEquals(selector(None), 0)
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    def test_selector_and_function(self):
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        selector = _1_() & _2_
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        self.assertEquals(selector(None), 3)
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        selector = _2_ & _1_()
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        self.assertEquals(selector(None), 3)
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    def test_three_and(self):
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        selector = _1_() & _1_() & _1_()
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        self.assertEquals(selector(None), 3)
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        selector = _1_() & _0_() & _1_()
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        self.assertEquals(selector(None), 0)
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        selector = _0_() & _1_() & _1_()
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        self.assertEquals(selector(None), 0)
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    def test_three_or(self):
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        selector = _1_() | _1_() | _1_()
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        self.assertEquals(selector(None), 1)
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        selector = _1_() | _0_() | _1_()
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        self.assertEquals(selector(None), 1)
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        selector = _0_() | _1_() | _1_()
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        self.assertEquals(selector(None), 1)
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        selector = _0_() | _0_() | _0_()
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        self.assertEquals(selector(None), 0)
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    def test_composition(self):
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        selector = (_1_() & _1_()) & (_1_() & _1_())
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        self.failUnless(isinstance(selector, AndSelector))
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        self.assertEquals(len(selector.selectors), 4)
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        self.assertEquals(selector(None), 4)
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        selector = (_1_() & _0_()) | (_1_() & _1_())
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        self.failUnless(isinstance(selector, OrSelector))
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        self.assertEquals(len(selector.selectors), 2)
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        self.assertEquals(selector(None), 2)
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if __name__ == '__main__':
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    unittest_main()
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