- unit tests have been migrated from unittest to nose.

See README.unittests for information on how to run
the tests.  [ticket:970]

1 files changed, 0 insertions, 815 deletions

diff --git a/test/sql/generative.py b/test/sql/generative.py
deleted file mode 100644
index 3947a450f..000000000
--- a/test/sql/generative.py
+++ /dev/null
@@ -1,815 +0,0 @@
-import testenv; testenv.configure_for_tests()
-from sqlalchemy import *
-from sqlalchemy.sql import table, column, ClauseElement
-from sqlalchemy.sql.expression import  _clone, _from_objects
-from testlib import *
-from sqlalchemy.sql.visitors import *
-from sqlalchemy import util
-from sqlalchemy.sql import util as sql_util
-
-
-class TraversalTest(TestBase, AssertsExecutionResults):
-    """test ClauseVisitor's traversal, particularly its ability to copy and modify
-    a ClauseElement in place."""
-
-    def setUpAll(self):
-        global A, B
-
-        # establish two ficticious ClauseElements.
-        # define deep equality semantics as well as deep identity semantics.
-        class A(ClauseElement):
-            __visit_name__ = 'a'
-
-            def __init__(self, expr):
-                self.expr = expr
-
-            def is_other(self, other):
-                return other is self
-
-            __hash__ = ClauseElement.__hash__
-            
-            def __eq__(self, other):
-                return other.expr == self.expr
-
-            def __ne__(self, other):
-                return other.expr != self.expr
-
-            def __str__(self):
-                return "A(%s)" % repr(self.expr)
-
-        class B(ClauseElement):
-            __visit_name__ = 'b'
-
-            def __init__(self, *items):
-                self.items = items
-
-            def is_other(self, other):
-                if other is not self:
-                    return False
-                for i1, i2 in zip(self.items, other.items):
-                    if i1 is not i2:
-                        return False
-                return True
-
-            __hash__ = ClauseElement.__hash__
-
-            def __eq__(self, other):
-                for i1, i2 in zip(self.items, other.items):
-                    if i1 != i2:
-                        return False
-                return True
-
-            def __ne__(self, other):
-                for i1, i2 in zip(self.items, other.items):
-                    if i1 != i2:
-                        return True
-                return False
-
-            def _copy_internals(self, clone=_clone):
-                self.items = [clone(i) for i in self.items]
-
-            def get_children(self, **kwargs):
-                return self.items
-
-            def __str__(self):
-                return "B(%s)" % repr([str(i) for i in self.items])
-
-    def test_test_classes(self):
-        a1 = A("expr1")
-        struct = B(a1, A("expr2"), B(A("expr1b"), A("expr2b")), A("expr3"))
-        struct2 = B(a1, A("expr2"), B(A("expr1b"), A("expr2b")), A("expr3"))
-        struct3 = B(a1, A("expr2"), B(A("expr1b"), A("expr2bmodified")), A("expr3"))
-
-        assert a1.is_other(a1)
-        assert struct.is_other(struct)
-        assert struct == struct2
-        assert struct != struct3
-        assert not struct.is_other(struct2)
-        assert not struct.is_other(struct3)
-
-    def test_clone(self):
-        struct = B(A("expr1"), A("expr2"), B(A("expr1b"), A("expr2b")), A("expr3"))
-
-        class Vis(CloningVisitor):
-            def visit_a(self, a):
-                pass
-            def visit_b(self, b):
-                pass
-
-        vis = Vis()
-        s2 = vis.traverse(struct)
-        assert struct == s2
-        assert not struct.is_other(s2)
-    
-    def test_no_clone(self):
-        struct = B(A("expr1"), A("expr2"), B(A("expr1b"), A("expr2b")), A("expr3"))
-
-        class Vis(ClauseVisitor):
-            def visit_a(self, a):
-                pass
-            def visit_b(self, b):
-                pass
-
-        vis = Vis()
-        s2 = vis.traverse(struct)
-        assert struct == s2
-        assert struct.is_other(s2)
-
-    def test_change_in_place(self):
-        struct = B(A("expr1"), A("expr2"), B(A("expr1b"), A("expr2b")), A("expr3"))
-        struct2 = B(A("expr1"), A("expr2modified"), B(A("expr1b"), A("expr2b")), A("expr3"))
-        struct3 = B(A("expr1"), A("expr2"), B(A("expr1b"), A("expr2bmodified")), A("expr3"))
-
-        class Vis(CloningVisitor):
-            def visit_a(self, a):
-                if a.expr == "expr2":
-                    a.expr = "expr2modified"
-            def visit_b(self, b):
-                pass
-
-        vis = Vis()
-        s2 = vis.traverse(struct)
-        assert struct != s2
-        assert not struct.is_other(s2)
-        assert struct2 == s2
-
-        class Vis2(CloningVisitor):
-            def visit_a(self, a):
-                if a.expr == "expr2b":
-                    a.expr = "expr2bmodified"
-            def visit_b(self, b):
-                pass
-
-        vis2 = Vis2()
-        s3 = vis2.traverse(struct)
-        assert struct != s3
-        assert struct3 == s3
-
-    def test_visit_name(self):
-        # override fns in testlib/schema.py
-        from sqlalchemy import Column
-
-        class CustomObj(Column):
-            pass
-            
-        assert CustomObj.__visit_name__ == Column.__visit_name__ == 'column'
-        
-        foo, bar = CustomObj('foo', String), CustomObj('bar', String)
-        bin = foo == bar
-        s = set(ClauseVisitor().iterate(bin))
-        assert set(ClauseVisitor().iterate(bin)) == set([foo, bar, bin])
-
-class ClauseTest(TestBase, AssertsCompiledSQL):
-    """test copy-in-place behavior of various ClauseElements."""
-
-    def setUpAll(self):
-        global t1, t2
-        t1 = table("table1",
-            column("col1"),
-            column("col2"),
-            column("col3"),
-            )
-        t2 = table("table2",
-            column("col1"),
-            column("col2"),
-            column("col3"),
-            )
-
-    def test_binary(self):
-        clause = t1.c.col2 == t2.c.col2
-        assert str(clause) == CloningVisitor().traverse(clause)
-
-    def test_binary_anon_label_quirk(self):
-        t = table('t1', column('col1'))
-
-
-        f = t.c.col1 * 5
-        self.assert_compile(select([f]), "SELECT t1.col1 * :col1_1 AS anon_1 FROM t1")
-
-        f.anon_label
-
-        a = t.alias()
-        f = sql_util.ClauseAdapter(a).traverse(f)
-
-        self.assert_compile(select([f]), "SELECT t1_1.col1 * :col1_1 AS anon_1 FROM t1 AS t1_1")
-        
-    def test_join(self):
-        clause = t1.join(t2, t1.c.col2==t2.c.col2)
-        c1 = str(clause)
-        assert str(clause) == str(CloningVisitor().traverse(clause))
-
-        class Vis(CloningVisitor):
-            def visit_binary(self, binary):
-                binary.right = t2.c.col3
-
-        clause2 = Vis().traverse(clause)
-        assert c1 == str(clause)
-        assert str(clause2) == str(t1.join(t2, t1.c.col2==t2.c.col3))
-    
-    def test_text(self):
-        clause = text("select * from table where foo=:bar", bindparams=[bindparam('bar')])
-        c1 = str(clause)
-        class Vis(CloningVisitor):
-            def visit_textclause(self, text):
-                text.text = text.text + " SOME MODIFIER=:lala"
-                text.bindparams['lala'] = bindparam('lala')
-
-        clause2 = Vis().traverse(clause)
-        assert c1 == str(clause)
-        assert str(clause2) == c1 + " SOME MODIFIER=:lala"
-        assert clause.bindparams.keys() == ['bar']
-        assert set(clause2.bindparams.keys()) == set(['bar', 'lala'])
-
-    def test_select(self):
-        s2 = select([t1])
-        s2_assert = str(s2)
-        s3_assert = str(select([t1], t1.c.col2==7))
-        class Vis(CloningVisitor):
-            def visit_select(self, select):
-                select.append_whereclause(t1.c.col2==7)
-        s3 = Vis().traverse(s2)
-        assert str(s3) == s3_assert
-        assert str(s2) == s2_assert
-        print str(s2)
-        print str(s3)
-        class Vis(ClauseVisitor):
-            def visit_select(self, select):
-                select.append_whereclause(t1.c.col2==7)
-        Vis().traverse(s2)
-        assert str(s2) == s3_assert
-
-        print "------------------"
-
-        s4_assert = str(select([t1], and_(t1.c.col2==7, t1.c.col3==9)))
-        class Vis(CloningVisitor):
-            def visit_select(self, select):
-                select.append_whereclause(t1.c.col3==9)
-        s4 = Vis().traverse(s3)
-        print str(s3)
-        print str(s4)
-        assert str(s4) == s4_assert
-        assert str(s3) == s3_assert
-
-        print "------------------"
-        s5_assert = str(select([t1], and_(t1.c.col2==7, t1.c.col1==9)))
-        class Vis(CloningVisitor):
-            def visit_binary(self, binary):
-                if binary.left is t1.c.col3:
-                    binary.left = t1.c.col1
-                    binary.right = bindparam("col1", unique=True)
-        s5 = Vis().traverse(s4)
-        print str(s4)
-        print str(s5)
-        assert str(s5) == s5_assert
-        assert str(s4) == s4_assert
-    
-    def test_union(self):
-        u = union(t1.select(), t2.select())
-        u2 = CloningVisitor().traverse(u)
-        assert str(u) == str(u2)
-        assert [str(c) for c in u2.c] == [str(c) for c in u.c]
-
-        u = union(t1.select(), t2.select())
-        cols = [str(c) for c in u.c]
-        u2 = CloningVisitor().traverse(u)
-        assert str(u) == str(u2)
-        assert [str(c) for c in u2.c] == cols
-        
-        s1 = select([t1], t1.c.col1 == bindparam('id_param'))
-        s2 = select([t2])
-        u = union(s1, s2)
-        
-        u2 = u.params(id_param=7)
-        u3 = u.params(id_param=10)
-        assert str(u) == str(u2) == str(u3)
-        assert u2.compile().params == {'id_param':7}
-        assert u3.compile().params == {'id_param':10}
-    
-    def test_adapt_union(self):
-        u = union(t1.select().where(t1.c.col1==4), t1.select().where(t1.c.col1==5)).alias()
-        
-        assert sql_util.ClauseAdapter(u).traverse(t1) is u
-        
-    def test_binds(self):
-        """test that unique bindparams change their name upon clone() to prevent conflicts"""
-
-        s = select([t1], t1.c.col1==bindparam(None, unique=True)).alias()
-        s2 = CloningVisitor().traverse(s).alias()
-        s3 = select([s], s.c.col2==s2.c.col2)
-
-        self.assert_compile(s3, "SELECT anon_1.col1, anon_1.col2, anon_1.col3 FROM (SELECT table1.col1 AS col1, table1.col2 AS col2, "\
-        "table1.col3 AS col3 FROM table1 WHERE table1.col1 = :param_1) AS anon_1, "\
-        "(SELECT table1.col1 AS col1, table1.col2 AS col2, table1.col3 AS col3 FROM table1 WHERE table1.col1 = :param_2) AS anon_2 "\
-        "WHERE anon_1.col2 = anon_2.col2")
-
-        s = select([t1], t1.c.col1==4).alias()
-        s2 = CloningVisitor().traverse(s).alias()
-        s3 = select([s], s.c.col2==s2.c.col2)
-        self.assert_compile(s3, "SELECT anon_1.col1, anon_1.col2, anon_1.col3 FROM (SELECT table1.col1 AS col1, table1.col2 AS col2, "\
-        "table1.col3 AS col3 FROM table1 WHERE table1.col1 = :col1_1) AS anon_1, "\
-        "(SELECT table1.col1 AS col1, table1.col2 AS col2, table1.col3 AS col3 FROM table1 WHERE table1.col1 = :col1_2) AS anon_2 "\
-        "WHERE anon_1.col2 = anon_2.col2")
-
-    @testing.emits_warning('.*replaced by another column with the same key')
-    def test_alias(self):
-        subq = t2.select().alias('subq')
-        s = select([t1.c.col1, subq.c.col1], from_obj=[t1, subq, t1.join(subq, t1.c.col1==subq.c.col2)])
-        orig = str(s)
-        s2 = CloningVisitor().traverse(s)
-        assert orig == str(s) == str(s2)
-
-        s4 = CloningVisitor().traverse(s2)
-        assert orig == str(s) == str(s2) == str(s4)
-
-        s3 = sql_util.ClauseAdapter(table('foo')).traverse(s)
-        assert orig == str(s) == str(s3)
-
-        s4 = sql_util.ClauseAdapter(table('foo')).traverse(s3)
-        assert orig == str(s) == str(s3) == str(s4)
-
-    def test_correlated_select(self):
-        s = select(['*'], t1.c.col1==t2.c.col1, from_obj=[t1, t2]).correlate(t2)
-        class Vis(CloningVisitor):
-            def visit_select(self, select):
-                select.append_whereclause(t1.c.col2==7)
-
-        self.assert_compile(Vis().traverse(s), "SELECT * FROM table1 WHERE table1.col1 = table2.col1 AND table1.col2 = :col2_1")
-    
-    def test_this_thing(self):
-        s = select([t1]).where(t1.c.col1=='foo').alias()
-        s2 = select([s.c.col1])
-        
-        self.assert_compile(s2, "SELECT anon_1.col1 FROM (SELECT table1.col1 AS col1, table1.col2 AS col2, table1.col3 AS col3 FROM table1 WHERE table1.col1 = :col1_1) AS anon_1")
-        t1a = t1.alias()
-        s2 = sql_util.ClauseAdapter(t1a).traverse(s2)
-        self.assert_compile(s2, "SELECT anon_1.col1 FROM (SELECT table1_1.col1 AS col1, table1_1.col2 AS col2, table1_1.col3 AS col3 FROM table1 AS table1_1 WHERE table1_1.col1 = :col1_1) AS anon_1")
-        
-    def test_select_fromtwice(self):
-        t1a = t1.alias()
-        
-        s = select([1], t1.c.col1==t1a.c.col1, from_obj=t1a).correlate(t1)
-        self.assert_compile(s, "SELECT 1 FROM table1 AS table1_1 WHERE table1.col1 = table1_1.col1")
-        
-        s = CloningVisitor().traverse(s)
-        self.assert_compile(s, "SELECT 1 FROM table1 AS table1_1 WHERE table1.col1 = table1_1.col1")
-        
-        s = select([t1]).where(t1.c.col1=='foo').alias()
-        
-        s2 = select([1], t1.c.col1==s.c.col1, from_obj=s).correlate(t1)
-        self.assert_compile(s2, "SELECT 1 FROM (SELECT table1.col1 AS col1, table1.col2 AS col2, table1.col3 AS col3 FROM table1 WHERE table1.col1 = :col1_1) AS anon_1 WHERE table1.col1 = anon_1.col1")
-        s2 = ReplacingCloningVisitor().traverse(s2)
-        self.assert_compile(s2, "SELECT 1 FROM (SELECT table1.col1 AS col1, table1.col2 AS col2, table1.col3 AS col3 FROM table1 WHERE table1.col1 = :col1_1) AS anon_1 WHERE table1.col1 = anon_1.col1")
-        
-class ClauseAdapterTest(TestBase, AssertsCompiledSQL):
-    def setUpAll(self):
-        global t1, t2
-        t1 = table("table1",
-            column("col1"),
-            column("col2"),
-            column("col3"),
-            )
-        t2 = table("table2",
-            column("col1"),
-            column("col2"),
-            column("col3"),
-            )
-
-    def test_correlation_on_clone(self):
-        t1alias = t1.alias('t1alias')
-        t2alias = t2.alias('t2alias')
-        vis = sql_util.ClauseAdapter(t1alias)
-
-        s = select(['*'], from_obj=[t1alias, t2alias]).as_scalar()
-        assert t2alias in s._froms
-        assert t1alias in s._froms
-
-        self.assert_compile(select(['*'], t2alias.c.col1==s), "SELECT * FROM table2 AS t2alias WHERE t2alias.col1 = (SELECT * FROM table1 AS t1alias)")
-        s = vis.traverse(s)
-
-        assert t2alias not in s._froms  # not present because it's been cloned
-
-        assert t1alias in s._froms # present because the adapter placed it there
-
-        # correlate list on "s" needs to take into account the full _cloned_set for each element in _froms when correlating
-        self.assert_compile(select(['*'], t2alias.c.col1==s), "SELECT * FROM table2 AS t2alias WHERE t2alias.col1 = (SELECT * FROM table1 AS t1alias)")
-
-        s = select(['*'], from_obj=[t1alias, t2alias]).correlate(t2alias).as_scalar()
-        self.assert_compile(select(['*'], t2alias.c.col1==s), "SELECT * FROM table2 AS t2alias WHERE t2alias.col1 = (SELECT * FROM table1 AS t1alias)")
-        s = vis.traverse(s)
-        self.assert_compile(select(['*'], t2alias.c.col1==s), "SELECT * FROM table2 AS t2alias WHERE t2alias.col1 = (SELECT * FROM table1 AS t1alias)")
-        s = CloningVisitor().traverse(s)
-        self.assert_compile(select(['*'], t2alias.c.col1==s), "SELECT * FROM table2 AS t2alias WHERE t2alias.col1 = (SELECT * FROM table1 AS t1alias)")
-        
-        s = select(['*']).where(t1.c.col1==t2.c.col1).as_scalar()
-        self.assert_compile(select([t1.c.col1, s]), "SELECT table1.col1, (SELECT * FROM table2 WHERE table1.col1 = table2.col1) AS anon_1 FROM table1")
-        vis = sql_util.ClauseAdapter(t1alias)
-        s = vis.traverse(s)
-        self.assert_compile(select([t1alias.c.col1, s]), "SELECT t1alias.col1, (SELECT * FROM table2 WHERE t1alias.col1 = table2.col1) AS anon_1 FROM table1 AS t1alias")
-        s = CloningVisitor().traverse(s)
-        self.assert_compile(select([t1alias.c.col1, s]), "SELECT t1alias.col1, (SELECT * FROM table2 WHERE t1alias.col1 = table2.col1) AS anon_1 FROM table1 AS t1alias")
-
-        s = select(['*']).where(t1.c.col1==t2.c.col1).correlate(t1).as_scalar()
-        self.assert_compile(select([t1.c.col1, s]), "SELECT table1.col1, (SELECT * FROM table2 WHERE table1.col1 = table2.col1) AS anon_1 FROM table1")
-        vis = sql_util.ClauseAdapter(t1alias)
-        s = vis.traverse(s)
-        self.assert_compile(select([t1alias.c.col1, s]), "SELECT t1alias.col1, (SELECT * FROM table2 WHERE t1alias.col1 = table2.col1) AS anon_1 FROM table1 AS t1alias")
-        s = CloningVisitor().traverse(s)
-        self.assert_compile(select([t1alias.c.col1, s]), "SELECT t1alias.col1, (SELECT * FROM table2 WHERE t1alias.col1 = table2.col1) AS anon_1 FROM table1 AS t1alias")
-
-    @testing.fails_on_everything_except()
-    def test_joins_dont_adapt(self):
-        # adapting to a join, i.e. ClauseAdapter(t1.join(t2)), doesn't make much sense.
-        # ClauseAdapter doesn't make any changes if it's against a straight join.
-        users = table('users', column('id'))
-        addresses = table('addresses', column('id'), column('user_id'))
-
-        ualias = users.alias()
-
-        s = select([func.count(addresses.c.id)], users.c.id==addresses.c.user_id).correlate(users) #.as_scalar().label(None)
-        s= sql_util.ClauseAdapter(ualias).traverse(s)
-
-        j1 = addresses.join(ualias, addresses.c.user_id==ualias.c.id)
-
-        self.assert_compile(sql_util.ClauseAdapter(j1).traverse(s), "SELECT count(addresses.id) AS count_1 FROM addresses WHERE users_1.id = addresses.user_id")
-        
-    def test_table_to_alias(self):
-
-        t1alias = t1.alias('t1alias')
-
-        vis = sql_util.ClauseAdapter(t1alias)
-        ff = vis.traverse(func.count(t1.c.col1).label('foo'))
-        assert list(_from_objects(ff)) == [t1alias]
-
-        self.assert_compile(vis.traverse(select(['*'], from_obj=[t1])), "SELECT * FROM table1 AS t1alias")
-        self.assert_compile(select(['*'], t1.c.col1==t2.c.col2), "SELECT * FROM table1, table2 WHERE table1.col1 = table2.col2")
-        self.assert_compile(vis.traverse(select(['*'], t1.c.col1==t2.c.col2)), "SELECT * FROM table1 AS t1alias, table2 WHERE t1alias.col1 = table2.col2")
-        self.assert_compile(vis.traverse(select(['*'], t1.c.col1==t2.c.col2, from_obj=[t1, t2])), "SELECT * FROM table1 AS t1alias, table2 WHERE t1alias.col1 = table2.col2")
-        self.assert_compile(vis.traverse(select(['*'], t1.c.col1==t2.c.col2, from_obj=[t1, t2]).correlate(t1)), "SELECT * FROM table2 WHERE t1alias.col1 = table2.col2")
-        self.assert_compile(vis.traverse(select(['*'], t1.c.col1==t2.c.col2, from_obj=[t1, t2]).correlate(t2)), "SELECT * FROM table1 AS t1alias WHERE t1alias.col1 = table2.col2")
-
-        self.assert_compile(vis.traverse(case([(t1.c.col1==5, t1.c.col2)], else_=t1.c.col1)), 
-            "CASE WHEN (t1alias.col1 = :col1_1) THEN t1alias.col2 ELSE t1alias.col1 END"
-        )
-        self.assert_compile(vis.traverse(case([(5, t1.c.col2)], value=t1.c.col1, else_=t1.c.col1)), 
-            "CASE t1alias.col1 WHEN :param_1 THEN t1alias.col2 ELSE t1alias.col1 END"
-        )
-
-
-        s = select(['*'], from_obj=[t1]).alias('foo')
-        self.assert_compile(s.select(), "SELECT foo.* FROM (SELECT * FROM table1) AS foo")
-        self.assert_compile(vis.traverse(s.select()), "SELECT foo.* FROM (SELECT * FROM table1 AS t1alias) AS foo")
-        self.assert_compile(s.select(), "SELECT foo.* FROM (SELECT * FROM table1) AS foo")
-
-        ff = vis.traverse(func.count(t1.c.col1).label('foo'))
-        self.assert_compile(select([ff]), "SELECT count(t1alias.col1) AS foo FROM table1 AS t1alias")
-        assert list(_from_objects(ff)) == [t1alias]
-
-# TODO:
-    #    self.assert_compile(vis.traverse(select([func.count(t1.c.col1).label('foo')]), clone=True), "SELECT count(t1alias.col1) AS foo FROM table1 AS t1alias")
-
-        t2alias = t2.alias('t2alias')
-        vis.chain(sql_util.ClauseAdapter(t2alias))
-        self.assert_compile(vis.traverse(select(['*'], t1.c.col1==t2.c.col2)), "SELECT * FROM table1 AS t1alias, table2 AS t2alias WHERE t1alias.col1 = t2alias.col2")
-        self.assert_compile(vis.traverse(select(['*'], t1.c.col1==t2.c.col2, from_obj=[t1, t2])), "SELECT * FROM table1 AS t1alias, table2 AS t2alias WHERE t1alias.col1 = t2alias.col2")
-        self.assert_compile(vis.traverse(select(['*'], t1.c.col1==t2.c.col2, from_obj=[t1, t2]).correlate(t1)), "SELECT * FROM table2 AS t2alias WHERE t1alias.col1 = t2alias.col2")
-        self.assert_compile(vis.traverse(select(['*'], t1.c.col1==t2.c.col2, from_obj=[t1, t2]).correlate(t2)), "SELECT * FROM table1 AS t1alias WHERE t1alias.col1 = t2alias.col2")
-
-    def test_include_exclude(self):
-        m = MetaData()
-        a=Table( 'a',m,
-          Column( 'id',    Integer, primary_key=True),
-          Column( 'xxx_id', Integer, ForeignKey( 'a.id', name='adf',use_alter=True ) )
-        )
-
-        e = (a.c.id == a.c.xxx_id)
-        assert str(e) == "a.id = a.xxx_id"
-        b = a.alias()
-
-        e = sql_util.ClauseAdapter( b, include= set([ a.c.id ]),
-          equivalents= { a.c.id: set([ a.c.id]) }
-        ).traverse( e)
-
-        assert str(e) == "a_1.id = a.xxx_id"
-
-    def test_recursive_equivalents(self):
-        m = MetaData()
-        a = Table('a', m, Column('x', Integer), Column('y', Integer))
-        b = Table('b', m, Column('x', Integer), Column('y', Integer))
-        c = Table('c', m, Column('x', Integer), Column('y', Integer))
-        
-        # force a recursion overflow, by linking a.c.x<->c.c.x, and
-        # asking for a nonexistent col.  corresponding_column should prevent
-        # endless depth.
-        adapt = sql_util.ClauseAdapter( b, equivalents= {a.c.x: set([ c.c.x]), c.c.x:set([a.c.x])})
-        assert adapt._corresponding_column(a.c.x, False) is None
-
-    def test_multilevel_equivalents(self):
-        m = MetaData()
-        a = Table('a', m, Column('x', Integer), Column('y', Integer))
-        b = Table('b', m, Column('x', Integer), Column('y', Integer))
-        c = Table('c', m, Column('x', Integer), Column('y', Integer))
-
-        alias = select([a]).select_from(a.join(b, a.c.x==b.c.x)).alias()
-        
-        # two levels of indirection from c.x->b.x->a.x, requires recursive 
-        # corresponding_column call
-        adapt = sql_util.ClauseAdapter(alias, equivalents= {b.c.x: set([ a.c.x]), c.c.x:set([b.c.x])})
-        assert adapt._corresponding_column(a.c.x, False) is alias.c.x
-        assert adapt._corresponding_column(c.c.x, False) is alias.c.x
-        
-    def test_join_to_alias(self):
-        metadata = MetaData()
-        a = Table('a', metadata,
-            Column('id', Integer, primary_key=True))
-        b = Table('b', metadata,
-            Column('id', Integer, primary_key=True),
-            Column('aid', Integer, ForeignKey('a.id')),
-            )
-        c = Table('c', metadata,
-            Column('id', Integer, primary_key=True),
-            Column('bid', Integer, ForeignKey('b.id')),
-            )
-
-        d = Table('d', metadata,
-            Column('id', Integer, primary_key=True),
-            Column('aid', Integer, ForeignKey('a.id')),
-            )
-
-        j1 = a.outerjoin(b)
-        j2 = select([j1], use_labels=True)
-
-        j3 = c.join(j2, j2.c.b_id==c.c.bid)
-
-        j4 = j3.outerjoin(d)
-        self.assert_compile(j4,  "c JOIN (SELECT a.id AS a_id, b.id AS b_id, b.aid AS b_aid FROM a LEFT OUTER JOIN b ON a.id = b.aid) "
-                                 "ON b_id = c.bid"
-                                 " LEFT OUTER JOIN d ON a_id = d.aid")
-        j5 = j3.alias('foo')
-        j6 = sql_util.ClauseAdapter(j5).copy_and_process([j4])[0]
-
-        # this statement takes c join(a join b), wraps it inside an aliased "select * from c join(a join b) AS foo".
-        # the outermost right side "left outer join d" stays the same, except "d" joins against foo.a_id instead
-        # of plain "a_id"
-        self.assert_compile(j6, "(SELECT c.id AS c_id, c.bid AS c_bid, a_id AS a_id, b_id AS b_id, b_aid AS b_aid FROM "
-                                "c JOIN (SELECT a.id AS a_id, b.id AS b_id, b.aid AS b_aid FROM a LEFT OUTER JOIN b ON a.id = b.aid) "
-                                "ON b_id = c.bid) AS foo"
-                                " LEFT OUTER JOIN d ON foo.a_id = d.aid")
-
-    def test_derived_from(self):
-        assert select([t1]).is_derived_from(t1)
-        assert not select([t2]).is_derived_from(t1)
-        assert not t1.is_derived_from(select([t1]))
-        assert t1.alias().is_derived_from(t1)
-
-
-        s1 = select([t1, t2]).alias('foo')
-        s2 = select([s1]).limit(5).offset(10).alias()
-        assert s2.is_derived_from(s1)
-        s2 = s2._clone()
-        assert s2.is_derived_from(s1)
-
-    def test_aliasedselect_to_aliasedselect(self):
-        # original issue from ticket #904
-        s1 = select([t1]).alias('foo')
-        s2 = select([s1]).limit(5).offset(10).alias()
-
-        self.assert_compile(sql_util.ClauseAdapter(s2).traverse(s1),
-            "SELECT foo.col1, foo.col2, foo.col3 FROM (SELECT table1.col1 AS col1, table1.col2 AS col2, table1.col3 AS col3 FROM table1) AS foo  LIMIT 5 OFFSET 10")
-
-        j = s1.outerjoin(t2, s1.c.col1==t2.c.col1)
-        self.assert_compile(sql_util.ClauseAdapter(s2).traverse(j).select(),
-            "SELECT anon_1.col1, anon_1.col2, anon_1.col3, table2.col1, table2.col2, table2.col3 FROM "\
-            "(SELECT foo.col1 AS col1, foo.col2 AS col2, foo.col3 AS col3 FROM "\
-            "(SELECT table1.col1 AS col1, table1.col2 AS col2, table1.col3 AS col3 FROM table1) AS foo  LIMIT 5 OFFSET 10) AS anon_1 "\
-            "LEFT OUTER JOIN table2 ON anon_1.col1 = table2.col1")
-
-        talias = t1.alias('bar')
-        j = s1.outerjoin(talias, s1.c.col1==talias.c.col1)
-        self.assert_compile(sql_util.ClauseAdapter(s2).traverse(j).select(),
-            "SELECT anon_1.col1, anon_1.col2, anon_1.col3, bar.col1, bar.col2, bar.col3 FROM "\
-            "(SELECT foo.col1 AS col1, foo.col2 AS col2, foo.col3 AS col3 FROM "\
-            "(SELECT table1.col1 AS col1, table1.col2 AS col2, table1.col3 AS col3 FROM table1) AS foo  LIMIT 5 OFFSET 10) AS anon_1 "\
-            "LEFT OUTER JOIN table1 AS bar ON anon_1.col1 = bar.col1")
-    
-    def test_functions(self):
-        self.assert_compile(sql_util.ClauseAdapter(t1.alias()).traverse(func.count(t1.c.col1)), "count(table1_1.col1)")
-
-        s = select([func.count(t1.c.col1)])
-        self.assert_compile(sql_util.ClauseAdapter(t1.alias()).traverse(s), "SELECT count(table1_1.col1) AS count_1 FROM table1 AS table1_1")
-        
-    def test_recursive(self):
-        metadata = MetaData()
-        a = Table('a', metadata,
-            Column('id', Integer, primary_key=True))
-        b = Table('b', metadata,
-            Column('id', Integer, primary_key=True),
-            Column('aid', Integer, ForeignKey('a.id')),
-            )
-        c = Table('c', metadata,
-            Column('id', Integer, primary_key=True),
-            Column('bid', Integer, ForeignKey('b.id')),
-            )
-
-        d = Table('d', metadata,
-            Column('id', Integer, primary_key=True),
-            Column('aid', Integer, ForeignKey('a.id')),
-            )
-
-        u = union(
-            a.join(b).select().apply_labels(),
-            a.join(d).select().apply_labels()
-        ).alias()    
-        
-        self.assert_compile(
-            sql_util.ClauseAdapter(u).traverse(select([c.c.bid]).where(c.c.bid==u.c.b_aid)),
-            "SELECT c.bid "\
-            "FROM c, (SELECT a.id AS a_id, b.id AS b_id, b.aid AS b_aid "\
-            "FROM a JOIN b ON a.id = b.aid UNION SELECT a.id AS a_id, d.id AS d_id, d.aid AS d_aid "\
-            "FROM a JOIN d ON a.id = d.aid) AS anon_1 "\
-            "WHERE c.bid = anon_1.b_aid"
-        )
-
-class SpliceJoinsTest(TestBase, AssertsCompiledSQL):
-    def setUpAll(self):
-        global table1, table2, table3, table4
-        def _table(name):
-            return table(name, column("col1"), column("col2"),column("col3"))
-        
-        table1, table2, table3, table4 = [_table(name) for name in ("table1", "table2", "table3", "table4")]    
-
-    def test_splice(self):
-        (t1, t2, t3, t4) = (table1, table2, table1.alias(), table2.alias())
-        
-        j = t1.join(t2, t1.c.col1==t2.c.col1).join(t3, t2.c.col1==t3.c.col1).join(t4, t4.c.col1==t1.c.col1)
-        
-        s = select([t1]).where(t1.c.col2<5).alias()
-        
-        self.assert_compile(sql_util.splice_joins(s, j), 
-            "(SELECT table1.col1 AS col1, table1.col2 AS col2, "\
-            "table1.col3 AS col3 FROM table1 WHERE table1.col2 < :col2_1) AS anon_1 "\
-            "JOIN table2 ON anon_1.col1 = table2.col1 JOIN table1 AS table1_1 ON table2.col1 = table1_1.col1 "\
-            "JOIN table2 AS table2_1 ON table2_1.col1 = anon_1.col1")
-
-    def test_stop_on(self):
-        (t1, t2, t3) = (table1, table2, table3)
-        
-        j1= t1.join(t2, t1.c.col1==t2.c.col1)
-        j2 = j1.join(t3, t2.c.col1==t3.c.col1)
-        
-        s = select([t1]).select_from(j1).alias()
-        
-        self.assert_compile(sql_util.splice_joins(s, j2), 
-            "(SELECT table1.col1 AS col1, table1.col2 AS col2, table1.col3 AS col3 FROM table1 JOIN table2 "\
-            "ON table1.col1 = table2.col1) AS anon_1 JOIN table2 ON anon_1.col1 = table2.col1 JOIN table3 "\
-            "ON table2.col1 = table3.col1"
-        )
-
-        self.assert_compile(sql_util.splice_joins(s, j2, j1), 
-            "(SELECT table1.col1 AS col1, table1.col2 AS col2, table1.col3 AS col3 FROM table1 "\
-            "JOIN table2 ON table1.col1 = table2.col1) AS anon_1 JOIN table3 ON table2.col1 = table3.col1")
-    
-    def test_splice_2(self):
-        t2a = table2.alias()
-        t3a = table3.alias()
-        j1 = table1.join(t2a, table1.c.col1==t2a.c.col1).join(t3a, t2a.c.col2==t3a.c.col2)
-        
-        t2b = table4.alias()
-        j2 = table1.join(t2b, table1.c.col3==t2b.c.col3)
-        
-        self.assert_compile(sql_util.splice_joins(table1, j1), 
-            "table1 JOIN table2 AS table2_1 ON table1.col1 = table2_1.col1 "\
-            "JOIN table3 AS table3_1 ON table2_1.col2 = table3_1.col2")
-            
-        self.assert_compile(sql_util.splice_joins(table1, j2), "table1 JOIN table4 AS table4_1 ON table1.col3 = table4_1.col3")
-
-        self.assert_compile(sql_util.splice_joins(sql_util.splice_joins(table1, j1), j2), 
-            "table1 JOIN table2 AS table2_1 ON table1.col1 = table2_1.col1 "\
-            "JOIN table3 AS table3_1 ON table2_1.col2 = table3_1.col2 "\
-            "JOIN table4 AS table4_1 ON table1.col3 = table4_1.col3")
-    
-        
-class SelectTest(TestBase, AssertsCompiledSQL):
-    """tests the generative capability of Select"""
-
-    def setUpAll(self):
-        global t1, t2
-        t1 = table("table1",
-            column("col1"),
-            column("col2"),
-            column("col3"),
-            )
-        t2 = table("table2",
-            column("col1"),
-            column("col2"),
-            column("col3"),
-            )
-
-    def test_select(self):
-        self.assert_compile(t1.select().where(t1.c.col1==5).order_by(t1.c.col3),
-        "SELECT table1.col1, table1.col2, table1.col3 FROM table1 WHERE table1.col1 = :col1_1 ORDER BY table1.col3")
-
-        self.assert_compile(t1.select().select_from(select([t2], t2.c.col1==t1.c.col1)).order_by(t1.c.col3),
-            "SELECT table1.col1, table1.col2, table1.col3 FROM table1, (SELECT table2.col1 AS col1, table2.col2 AS col2, table2.col3 AS col3 "\
-            "FROM table2 WHERE table2.col1 = table1.col1) ORDER BY table1.col3")
-
-        s = select([t2], t2.c.col1==t1.c.col1, correlate=False)
-        s = s.correlate(t1).order_by(t2.c.col3)
-        self.assert_compile(t1.select().select_from(s).order_by(t1.c.col3),
-            "SELECT table1.col1, table1.col2, table1.col3 FROM table1, (SELECT table2.col1 AS col1, table2.col2 AS col2, table2.col3 AS col3 "\
-            "FROM table2 WHERE table2.col1 = table1.col1 ORDER BY table2.col3) ORDER BY table1.col3")
-
-    def test_columns(self):
-        s = t1.select()
-        self.assert_compile(s, "SELECT table1.col1, table1.col2, table1.col3 FROM table1")
-        select_copy = s.column('yyy')
-        self.assert_compile(select_copy, "SELECT table1.col1, table1.col2, table1.col3, yyy FROM table1")
-        assert s.columns is not select_copy.columns
-        assert s._columns is not select_copy._columns
-        assert s._raw_columns is not select_copy._raw_columns
-        self.assert_compile(s, "SELECT table1.col1, table1.col2, table1.col3 FROM table1")
-
-    def test_froms(self):
-        s = t1.select()
-        self.assert_compile(s, "SELECT table1.col1, table1.col2, table1.col3 FROM table1")
-        select_copy = s.select_from(t2)
-        self.assert_compile(select_copy, "SELECT table1.col1, table1.col2, table1.col3 FROM table1, table2")
-        assert s._froms is not select_copy._froms
-        self.assert_compile(s, "SELECT table1.col1, table1.col2, table1.col3 FROM table1")
-
-    def test_correlation(self):
-        s = select([t2], t1.c.col1==t2.c.col1)
-        self.assert_compile(s, "SELECT table2.col1, table2.col2, table2.col3 FROM table2, table1 WHERE table1.col1 = table2.col1")
-        s2 = select([t1], t1.c.col2==s.c.col2)
-        self.assert_compile(s2, "SELECT table1.col1, table1.col2, table1.col3 FROM table1, "
-                "(SELECT table2.col1 AS col1, table2.col2 AS col2, table2.col3 AS col3 FROM table2 "
-                "WHERE table1.col1 = table2.col1) WHERE table1.col2 = col2")
-
-        s3 = s.correlate(None)
-        self.assert_compile(select([t1], t1.c.col2==s3.c.col2), "SELECT table1.col1, table1.col2, table1.col3 FROM table1, "
-                "(SELECT table2.col1 AS col1, table2.col2 AS col2, table2.col3 AS col3 FROM table2, table1 "
-                "WHERE table1.col1 = table2.col1) WHERE table1.col2 = col2")
-        self.assert_compile(select([t1], t1.c.col2==s.c.col2), "SELECT table1.col1, table1.col2, table1.col3 FROM table1, "
-                "(SELECT table2.col1 AS col1, table2.col2 AS col2, table2.col3 AS col3 FROM table2 "
-                "WHERE table1.col1 = table2.col1) WHERE table1.col2 = col2")
-        s4 = s3.correlate(t1)
-        self.assert_compile(select([t1], t1.c.col2==s4.c.col2), "SELECT table1.col1, table1.col2, table1.col3 FROM table1, "
-                "(SELECT table2.col1 AS col1, table2.col2 AS col2, table2.col3 AS col3 FROM table2 "
-                "WHERE table1.col1 = table2.col1) WHERE table1.col2 = col2")
-        self.assert_compile(select([t1], t1.c.col2==s3.c.col2), "SELECT table1.col1, table1.col2, table1.col3 FROM table1, "
-                "(SELECT table2.col1 AS col1, table2.col2 AS col2, table2.col3 AS col3 FROM table2, table1 "
-                "WHERE table1.col1 = table2.col1) WHERE table1.col2 = col2")
-
-    def test_prefixes(self):
-        s = t1.select()
-        self.assert_compile(s, "SELECT table1.col1, table1.col2, table1.col3 FROM table1")
-        select_copy = s.prefix_with("FOOBER")
-        self.assert_compile(select_copy, "SELECT FOOBER table1.col1, table1.col2, table1.col3 FROM table1")
-        self.assert_compile(s, "SELECT table1.col1, table1.col2, table1.col3 FROM table1")
-
-
-class InsertTest(TestBase, AssertsCompiledSQL):
-    """Tests the generative capability of Insert"""
-
-    # fixme: consolidate converage from elsewhere here and expand
-
-    def setUpAll(self):
-        global t1, t2
-        t1 = table("table1",
-            column("col1"),
-            column("col2"),
-            column("col3"),
-            )
-        t2 = table("table2",
-            column("col1"),
-            column("col2"),
-            column("col3"),
-            )
-
-    def test_prefixes(self):
-        i = t1.insert()
-        self.assert_compile(i,
-                            "INSERT INTO table1 (col1, col2, col3) "
-                            "VALUES (:col1, :col2, :col3)")
-
-        gen = i.prefix_with("foober")
-        self.assert_compile(gen,
-                            "INSERT foober INTO table1 (col1, col2, col3) "
-                            "VALUES (:col1, :col2, :col3)")
-
-        self.assert_compile(i,
-                            "INSERT INTO table1 (col1, col2, col3) "
-                            "VALUES (:col1, :col2, :col3)")
-
-        i2 = t1.insert(prefixes=['squiznart'])
-        self.assert_compile(i2,
-                            "INSERT squiznart INTO table1 (col1, col2, col3) "
-                            "VALUES (:col1, :col2, :col3)")
-
-        gen2 = i2.prefix_with("quux")
-        self.assert_compile(gen2,
-                            "INSERT squiznart quux INTO "
-                            "table1 (col1, col2, col3) "
-                            "VALUES (:col1, :col2, :col3)")
-
-if __name__ == '__main__':
-    testenv.main()