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# This file is part of python-sql. The COPYRIGHT file at the top level of
# this repository contains the full copyright notices and license terms.
import unittest
from sql import AliasManager, Flavor, Literal, Table, Window
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_count_without_expression(self):
count = Count()
self.assertEqual(str(count), 'COUNT(%s)')
self.assertEqual(count.params, ('*',))
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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