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# -*- coding: utf-8 -*-
#
# Copyright (c) 2011-2018, Cédric Krier
# Copyright (c) 2011-2018, B2CK
# All rights reserved.
#
# Redistribution and use in source and binary forms, with or without
# modification, are permitted provided that the following conditions are met:
# * Redistributions of source code must retain the above copyright
# notice, this list of conditions and the following disclaimer.
# * Redistributions in binary form must reproduce the above copyright
# notice, this list of conditions and the following disclaimer in the
# documentation and/or other materials provided with the distribution.
# * Neither the name of the <organization> nor the
# names of its contributors may be used to endorse or promote products
# derived from this software without specific prior written permission.
#
# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
# AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
# IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
# ARE DISCLAIMED. IN NO EVENT SHALL <COPYRIGHT HOLDER> BE LIABLE FOR ANY
# DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
# (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
# LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
# ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
# SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
import unittest
from sql import Table, Window, AliasManager, Flavor, Literal
from sql.aggregate import Avg, Count
class TestAggregate(unittest.TestCase):
table = Table('t')
def test_avg(self):
avg = Avg(self.table.c)
self.assertEqual(str(avg), 'AVG("c")')
avg = Avg(self.table.a + self.table.b)
self.assertEqual(str(avg), 'AVG(("a" + "b"))')
def test_order_by_one_column(self):
avg = Avg(self.table.a, order_by=self.table.b)
self.assertEqual(str(avg), 'AVG("a" ORDER BY "b")')
self.assertEqual(avg.params, ())
def test_order_by_multiple_columns(self):
avg = Avg(
self.table.a, order_by=[self.table.b.asc, self.table.c.desc])
self.assertEqual(str(avg), 'AVG("a" ORDER BY "b" ASC, "c" DESC)')
self.assertEqual(avg.params, ())
def test_within(self):
avg = Avg(self.table.a, within=self.table.b)
self.assertEqual(str(avg), 'AVG("a") WITHIN GROUP (ORDER BY "b")')
self.assertEqual(avg.params, ())
def test_filter(self):
flavor = Flavor(filter_=True)
Flavor.set(flavor)
try:
avg = Avg(self.table.a + 1, filter_=self.table.a > 0)
self.assertEqual(
str(avg), 'AVG(("a" + %s)) FILTER (WHERE ("a" > %s))')
self.assertEqual(avg.params, (1, 0))
finally:
Flavor.set(Flavor())
def test_filter_case(self):
avg = Avg(self.table.a + 1, filter_=self.table.a > 0)
self.assertEqual(
str(avg), 'AVG(CASE WHEN ("a" > %s) THEN ("a" + %s) END)')
self.assertEqual(avg.params, (0, 1))
def test_filter_case_count_star(self):
count = Count(Literal('*'), filter_=self.table.a > 0)
self.assertEqual(
str(count), 'COUNT(CASE WHEN ("a" > %s) THEN %s END)')
self.assertEqual(count.params, (0, 1))
def test_window(self):
avg = Avg(self.table.c, window=Window([]))
with AliasManager():
self.assertEqual(str(avg), 'AVG("a"."c") OVER ()')
self.assertEqual(avg.params, ())
def test_distinct(self):
avg = Avg(self.table.c, distinct=True)
self.assertEqual(str(avg), 'AVG(DISTINCT "c")')
self.assertEqual(avg.params, ())
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