test/unittest_rqlrewrite.py
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"""
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:organization: Logilab
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:copyright: 2001-2010 LOGILAB S.A. (Paris, FRANCE), license is LGPL v2.
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:contact: http://www.logilab.fr/ -- mailto:contact@logilab.fr
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:license: GNU Lesser General Public License, v2.1 - http://www.gnu.org/licenses
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"""
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from logilab.common.testlib import unittest_main, TestCase
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from logilab.common.testlib import mock_object
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from rql import parse, nodes, RQLHelper
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from cubicweb import Unauthorized
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from cubicweb.schema import RRQLExpression
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from cubicweb.rqlrewrite import RQLRewriter
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from cubicweb.devtools import repotest, TestServerConfiguration
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config = TestServerConfiguration('data/rewrite')
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config.bootstrap_cubes()
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schema = config.load_schema()
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from yams.buildobjs import RelationDefinition
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schema.add_relation_def(RelationDefinition(subject='Card', name='in_state', object='State', cardinality='1*'))
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rqlhelper = RQLHelper(schema, special_relations={'eid': 'uid',
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                                                 'has_text': 'fti'})
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def setup_module(*args):
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    repotest.do_monkey_patch()
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def teardown_module(*args):
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    repotest.undo_monkey_patch()
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def eid_func_map(eid):
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    return {1: 'CWUser',
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            2: 'Card'}[eid]
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def rewrite(rqlst, snippets_map, kwargs, existingvars=None):
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    class FakeVReg:
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        schema = schema
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        @staticmethod
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        def solutions(sqlcursor, mainrqlst, kwargs):
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            rqlhelper.compute_solutions(rqlst, {'eid': eid_func_map}, kwargs=kwargs)
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        class rqlhelper:
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            @staticmethod
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            def annotate(rqlst):
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                rqlhelper.annotate(rqlst)
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            @staticmethod
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            def simplify(mainrqlst, needcopy=False):
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                rqlhelper.simplify(rqlst, needcopy)
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    rewriter = RQLRewriter(mock_object(vreg=FakeVReg, user=(mock_object(eid=1))))
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    for v, snippets in snippets_map.items():
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        snippets_map[v] = [isinstance(snippet, basestring)
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                           and mock_object(snippet_rqlst=parse('Any X WHERE '+snippet).children[0],
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                                           expression='Any X WHERE '+snippet)
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                           or snippet
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                           for snippet in snippets]
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    rqlhelper.compute_solutions(rqlst.children[0], {'eid': eid_func_map}, kwargs=kwargs)
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    solutions = rqlst.children[0].solutions
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    rewriter.rewrite(rqlst.children[0], snippets_map.items(), solutions, kwargs,
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                     existingvars)
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    test_vrefs(rqlst.children[0])
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    return rewriter.rewritten
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def test_vrefs(node):
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    vrefmap = {}
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    for vref in node.iget_nodes(nodes.VariableRef):
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        vrefmap.setdefault(vref.name, set()).add(vref)
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    for var in node.defined_vars.itervalues():
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        assert not (var.stinfo['references'] ^ vrefmap[var.name])
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        assert (var.stinfo['references'])
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class RQLRewriteTC(TestCase):
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    """a faire:
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    * optimisation: detecter les relations utilisees dans les rqlexpressions qui
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      sont presentes dans la requete de depart pour les reutiliser si possible
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0
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    * "has_<ACTION>_permission" ?
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    """
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    def test_base_var(self):
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        card_constraint = ('X in_state S, U in_group G, P require_state S,'
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                           'P name "read", P require_group G')
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        rqlst = parse('Card C')
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        rewrite(rqlst, {('C', 'X'): (card_constraint,)}, {})
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        self.failUnlessEqual(rqlst.as_string(),
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                             u"Any C WHERE C is Card, B eid %(D)s, "
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                             "EXISTS(C in_state A, B in_group E, F require_state A, "
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                             "F name 'read', F require_group E, A is State, E is CWGroup, F is CWPermission)")
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    def test_multiple_var(self):
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        card_constraint = ('X in_state S, U in_group G, P require_state S,'
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                           'P name "read", P require_group G')
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        affaire_constraints = ('X ref LIKE "PUBLIC%"', 'U in_group G, G name "public"')
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        kwargs = {'u':2}
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        rqlst = parse('Any S WHERE S documented_by C, C eid %(u)s')
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        rewrite(rqlst, {('C', 'X'): (card_constraint,), ('S', 'X'): affaire_constraints},
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                kwargs)
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        self.assertTextEquals(rqlst.as_string(),
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                             "Any S WHERE S documented_by C, C eid %(u)s, B eid %(D)s, "
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                             "EXISTS(C in_state A, B in_group E, F require_state A, "
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                             "F name 'read', F require_group E, A is State, E is CWGroup, F is CWPermission), "
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                             "(EXISTS(S ref LIKE 'PUBLIC%')) OR (EXISTS(B in_group G, G name 'public', G is CWGroup)), "
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                             "S is Affaire")
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        self.failUnless('D' in kwargs)
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    def test_or(self):
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        constraint = '(X identity U) OR (X in_state ST, CL identity U, CL in_state ST, ST name "subscribed")'
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        rqlst = parse('Any S WHERE S owned_by C, C eid %(u)s, S is in (CWUser, CWGroup)')
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        rewrite(rqlst, {('C', 'X'): (constraint,)}, {'u':1})
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        self.failUnlessEqual(rqlst.as_string(),
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                             "Any S WHERE S owned_by C, C eid %(u)s, S is IN(CWUser, CWGroup), A eid %(B)s, "
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                             "EXISTS((C identity A) OR (C in_state D, E identity A, "
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                             "E in_state D, D name 'subscribed'), D is State, E is CWUser)")
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    def test_simplified_rqlst(self):
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        card_constraint = ('X in_state S, U in_group G, P require_state S,'
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                           'P name "read", P require_group G')
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        rqlst = parse('Any 2') # this is the simplified rql st for Any X WHERE X eid 12
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        rewrite(rqlst, {('2', 'X'): (card_constraint,)}, {})
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        self.failUnlessEqual(rqlst.as_string(),
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                             u"Any 2 WHERE B eid %(C)s, "
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                             "EXISTS(2 in_state A, B in_group D, E require_state A, "
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                             "E name 'read', E require_group D, A is State, D is CWGroup, E is CWPermission)")
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    def test_optional_var(self):
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        card_constraint = ('X in_state S, U in_group G, P require_state S,'
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                           'P name "read", P require_group G')
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        rqlst = parse('Any A,C WHERE A documented_by C?')
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        rewrite(rqlst, {('C', 'X'): (card_constraint,)}, {})
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        self.failUnlessEqual(rqlst.as_string(),
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                             "Any A,C WHERE A documented_by C?, A is Affaire "
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                             "WITH C BEING "
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                             "(Any C WHERE C in_state B, D in_group F, G require_state B, G name 'read', "
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                             "G require_group F, D eid %(A)s, C is Card)")
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        rqlst = parse('Any A,C,T WHERE A documented_by C?, C title T')
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        rewrite(rqlst, {('C', 'X'): (card_constraint,)}, {})
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        self.failUnlessEqual(rqlst.as_string(),
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                             "Any A,C,T WHERE A documented_by C?, A is Affaire "
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   140
                             "WITH C,T BEING "
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                             "(Any C,T WHERE C in_state B, D in_group F, G require_state B, G name 'read', "
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                             "G require_group F, C title T, D eid %(A)s, C is Card)")
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   143
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   144
    def test_relation_optimization_1_lhs(self):
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        # since Card in_state State as monovalued cardinality, the in_state
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        # relation used in the rql expression can be ignored and S replaced by
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        # the variable from the incoming query
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        snippet = ('X in_state S, S name "hop"')
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        rqlst = parse('Card C WHERE C in_state STATE')
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        rewrite(rqlst, {('C', 'X'): (snippet,)}, {})
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        self.failUnlessEqual(rqlst.as_string(),
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                             "Any C WHERE C in_state STATE, C is Card, "
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                             "EXISTS(STATE name 'hop'), STATE is State")
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    def test_relation_optimization_1_rhs(self):
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        snippet = ('TW subworkflow_exit X, TW name "hop"')
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        rqlst = parse('WorkflowTransition C WHERE C subworkflow_exit EXIT')
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        rewrite(rqlst, {('EXIT', 'X'): (snippet,)}, {})
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        self.failUnlessEqual(rqlst.as_string(),
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   159
                             "Any C WHERE C subworkflow_exit EXIT, C is WorkflowTransition, "
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   160
                             "EXISTS(C name 'hop'), EXIT is SubWorkflowExitPoint")
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   161
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    def test_relation_optimization_2_lhs(self):
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        # optional relation can be shared if also optional in the snippet
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        snippet = ('X in_state S?, S name "hop"')
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        rqlst = parse('Card C WHERE C in_state STATE?')
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        rewrite(rqlst, {('C', 'X'): (snippet,)}, {})
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        self.failUnlessEqual(rqlst.as_string(),
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                             "Any C WHERE C in_state STATE?, C is Card, "
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   169
                             "EXISTS(STATE name 'hop'), STATE is State")
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   170
    def test_relation_optimization_2_rhs(self):
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        snippet = ('TW? subworkflow_exit X, TW name "hop"')
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        rqlst = parse('SubWorkflowExitPoint EXIT WHERE C? subworkflow_exit EXIT')
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        rewrite(rqlst, {('EXIT', 'X'): (snippet,)}, {})
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        self.failUnlessEqual(rqlst.as_string(),
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   175
                             "Any EXIT WHERE C? subworkflow_exit EXIT, EXIT is SubWorkflowExitPoint, "
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   176
                             "EXISTS(C name 'hop'), C is WorkflowTransition")
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   177
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   178
    def test_relation_optimization_3_lhs(self):
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        # optional relation in the snippet but not in the orig tree can be shared
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        snippet = ('X in_state S?, S name "hop"')
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        rqlst = parse('Card C WHERE C in_state STATE')
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        rewrite(rqlst, {('C', 'X'): (snippet,)}, {})
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   183
        self.failUnlessEqual(rqlst.as_string(),
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   184
                             "Any C WHERE C in_state STATE, C is Card, "
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   185
                             "EXISTS(STATE name 'hop'), STATE is State")
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   186
    def test_relation_optimization_3_rhs(self):
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   187
        snippet = ('TW? subworkflow_exit X, TW name "hop"')
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   188
        rqlst = parse('WorkflowTransition C WHERE C subworkflow_exit EXIT')
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   189
        rewrite(rqlst, {('EXIT', 'X'): (snippet,)}, {})
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   190
        self.failUnlessEqual(rqlst.as_string(),
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   191
                             "Any C WHERE C subworkflow_exit EXIT, C is WorkflowTransition, "
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   192
                             "EXISTS(C name 'hop'), EXIT is SubWorkflowExitPoint")
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   193
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   194
    def test_relation_non_optimization_1_lhs(self):
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   195
        # but optional relation in the orig tree but not in the snippet can't be shared
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   196
        snippet = ('X in_state S, S name "hop"')
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   197
        rqlst = parse('Card C WHERE C in_state STATE?')
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   198
        rewrite(rqlst, {('C', 'X'): (snippet,)}, {})
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   199
        self.failUnlessEqual(rqlst.as_string(),
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   200
                             "Any C WHERE C in_state STATE?, C is Card, "
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   201
                             "EXISTS(C in_state A, A name 'hop', A is State), STATE is State")
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   202
    def test_relation_non_optimization_1_rhs(self):
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   203
        snippet = ('TW subworkflow_exit X, TW name "hop"')
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   204
        rqlst = parse('SubWorkflowExitPoint EXIT WHERE C? subworkflow_exit EXIT')
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   205
        rewrite(rqlst, {('EXIT', 'X'): (snippet,)}, {})
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        self.failUnlessEqual(rqlst.as_string(),
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   207
                             "Any EXIT WHERE C? subworkflow_exit EXIT, EXIT is SubWorkflowExitPoint, "
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   208
                             "EXISTS(A subworkflow_exit EXIT, A name 'hop', A is WorkflowTransition), "
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   209
                             "C is WorkflowTransition")
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   210
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   211
    def test_unsupported_constraint_1(self):
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        # CWUser doesn't have require_permission
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        trinfo_constraint = ('X wf_info_for Y, Y require_permission P, P name "read"')
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        rqlst = parse('Any U,T WHERE U is CWUser, T wf_info_for U')
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        self.assertRaises(Unauthorized, rewrite, rqlst, {('T', 'X'): (trinfo_constraint,)}, {})
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0
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    def test_unsupported_constraint_2(self):
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        trinfo_constraint = ('X wf_info_for Y, Y require_permission P, P name "read"')
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        rqlst = parse('Any U,T WHERE U is CWUser, T wf_info_for U')
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        rewrite(rqlst, {('T', 'X'): (trinfo_constraint, 'X wf_info_for Y, Y in_group G, G name "managers"')}, {})
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        self.failUnlessEqual(rqlst.as_string(),
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                             u"Any U,T WHERE U is CWUser, T wf_info_for U, "
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                             "EXISTS(U in_group B, B name 'managers', B is CWGroup), T is TrInfo")
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    def test_unsupported_constraint_3(self):
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        self.skip('raise unauthorized for now')
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        trinfo_constraint = ('X wf_info_for Y, Y require_permission P, P name "read"')
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        rqlst = parse('Any T WHERE T wf_info_for X')
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        rewrite(rqlst, {('T', 'X'): (trinfo_constraint, 'X in_group G, G name "managers"')}, {})
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        self.failUnlessEqual(rqlst.as_string(),
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                             u'XXX dunno what should be generated')
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0
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    def test_add_ambiguity_exists(self):
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        constraint = ('X concerne Y')
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        rqlst = parse('Affaire X')
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        rewrite(rqlst, {('X', 'X'): (constraint,)}, {})
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        self.failUnlessEqual(rqlst.as_string(),
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                             u"Any X WHERE X is Affaire, ((EXISTS(X concerne A, A is Division)) OR (EXISTS(X concerne C, C is Societe))) OR (EXISTS(X concerne B, B is Note))")
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    def test_add_ambiguity_outerjoin(self):
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        constraint = ('X concerne Y')
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        rqlst = parse('Any X,C WHERE X? documented_by C')
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        rewrite(rqlst, {('X', 'X'): (constraint,)}, {})
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        # ambiguity are kept in the sub-query, no need to be resolved using OR
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        self.failUnlessEqual(rqlst.as_string(),
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                             u"Any X,C WHERE X? documented_by C, C is Card WITH X BEING (Any X WHERE X concerne A, X is Affaire)")
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    def test_rrqlexpr_nonexistant_subject_1(self):
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        constraint = RRQLExpression('S owned_by U')
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        rqlst = parse('Card C')
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        rewrite(rqlst, {('C', 'S'): (constraint,)}, {}, 'SU')
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        self.failUnlessEqual(rqlst.as_string(),
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                             u"Any C WHERE C is Card, A eid %(B)s, EXISTS(C owned_by A)")
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        rqlst = parse('Card C')
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        rewrite(rqlst, {('C', 'S'): (constraint,)}, {}, 'OU')
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        self.failUnlessEqual(rqlst.as_string(),
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                             u"Any C WHERE C is Card")
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        rqlst = parse('Card C')
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        rewrite(rqlst, {('C', 'S'): (constraint,)}, {}, 'SOU')
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        self.failUnlessEqual(rqlst.as_string(),
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                             u"Any C WHERE C is Card, A eid %(B)s, EXISTS(C owned_by A)")
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    def test_rrqlexpr_nonexistant_subject_2(self):
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        constraint = RRQLExpression('S owned_by U, O owned_by U, O is Card')
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        rqlst = parse('Card C')
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        rewrite(rqlst, {('C', 'S'): (constraint,)}, {}, 'SU')
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        self.failUnlessEqual(rqlst.as_string(),
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                             'Any C WHERE C is Card, A eid %(B)s, EXISTS(C owned_by A)')
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        rqlst = parse('Card C')
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        rewrite(rqlst, {('C', 'S'): (constraint,)}, {}, 'OU')
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        self.failUnlessEqual(rqlst.as_string(),
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                             'Any C WHERE C is Card, B eid %(D)s, EXISTS(A owned_by B, A is Card)')
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        rqlst = parse('Card C')
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        rewrite(rqlst, {('C', 'S'): (constraint,)}, {}, 'SOU')
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        self.failUnlessEqual(rqlst.as_string(),
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                             'Any C WHERE C is Card, A eid %(B)s, EXISTS(C owned_by A, D owned_by A, D is Card)')
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    def test_rrqlexpr_nonexistant_subject_3(self):
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        constraint = RRQLExpression('U in_group G, G name "users"')
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        rqlst = parse('Card C')
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        rewrite(rqlst, {('C', 'S'): (constraint,)}, {}, 'SU')
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        self.failUnlessEqual(rqlst.as_string(),
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                             u'Any C WHERE C is Card, A eid %(B)s, EXISTS(A in_group D, D name "users", D is CWGroup)')
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    def test_rrqlexpr_nonexistant_subject_4(self):
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        constraint = RRQLExpression('U in_group G, G name "users", S owned_by U')
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        rqlst = parse('Card C')
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        rewrite(rqlst, {('C', 'S'): (constraint,)}, {}, 'SU')
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        self.failUnlessEqual(rqlst.as_string(),
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                             u'Any C WHERE C is Card, A eid %(B)s, EXISTS(A in_group D, D name "users", C owned_by A, D is CWGroup)')
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        rqlst = parse('Card C')
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        rewrite(rqlst, {('C', 'S'): (constraint,)}, {}, 'OU')
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        self.failUnlessEqual(rqlst.as_string(),
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                             u'Any C WHERE C is Card, A eid %(B)s, EXISTS(A in_group D, D name "users", D is CWGroup)')
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    def test_rrqlexpr_nonexistant_subject_5(self):
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        constraint = RRQLExpression('S owned_by Z, O owned_by Z, O is Card')
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        rqlst = parse('Card C')
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        rewrite(rqlst, {('C', 'S'): (constraint,)}, {}, 'S')
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        self.failUnlessEqual(rqlst.as_string(),
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                             u"Any C WHERE C is Card, EXISTS(C owned_by A, A is CWUser)")
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if __name__ == '__main__':
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    unittest_main()