def setUp(self):
super(ExpressionTestCase, self).setUp()
self.table = Table.ref('test_table')
self.id_col = Column(table='test_table', name='id', spatial=False)
self.id_eq_100 = Comparison(eqcomp=EqComparison(lhs=Target(col=self.id_col), rhs=Target(ival=100), eq=Equality.EQ))
self.id_lt_100 = Comparison(eqcomp=EqComparison(lhs=Target(col=self.id_col), rhs=Target(ival=100), eq=Equality.LT))
self.id_is_null = Comparison(nullcomp=NullComparison(isnull=True, col=self.id_col))
self.id_not_null = Comparison(nullcomp=NullComparison(isnull=False, col=self.id_col))
