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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 Table, Window
class TestWindow(unittest.TestCase):
def test_window(self):
t = Table('t')
window = Window([t.c1, t.c2])
self.assertEqual(str(window), 'PARTITION BY "c1", "c2"')
self.assertEqual(window.params, ())
def test_window_invalid_partition(self):
with self.assertRaises(ValueError):
Window(['foo'])
def test_window_order(self):
t = Table('t')
window = Window([t.c], order_by=t.c)
self.assertEqual(str(window), 'PARTITION BY "c" ORDER BY "c"')
self.assertEqual(window.params, ())
def test_window_invalid_order(self):
with self.assertRaises(ValueError):
Window([Table('t').c], order_by='foo')
def test_window_range(self):
t = Table('t')
window = Window([t.c], frame='RANGE')
self.assertEqual(str(window),
'PARTITION BY "c" RANGE '
'BETWEEN UNBOUNDED PRECEDING AND CURRENT ROW')
self.assertEqual(window.params, ())
window.start = -1
self.assertEqual(str(window),
'PARTITION BY "c" RANGE '
'BETWEEN %s PRECEDING AND CURRENT ROW')
self.assertEqual(window.params, (1,))
window.start = 0
window.end = 1
self.assertEqual(str(window),
'PARTITION BY "c" RANGE '
'BETWEEN CURRENT ROW AND %s FOLLOWING')
self.assertEqual(window.params, (1,))
window.start = 1
window.end = None
self.assertEqual(str(window),
'PARTITION BY "c" RANGE '
'BETWEEN %s FOLLOWING AND UNBOUNDED FOLLOWING')
self.assertEqual(window.params, (1,))
def test_window_invalid_frame(self):
with self.assertRaises(ValueError):
Window([Table('t').c], frame='foo')
def test_window_invalid_start(self):
with self.assertRaises(ValueError):
Window([Table('t').c], start='foo')
def test_window_invalid_end(self):
with self.assertRaises(ValueError):
Window([Table('t').c], end='foo')
def test_window_exclude(self):
t = Table('t')
window = Window([t.c], exclude='TIES')
self.assertEqual(str(window),
'PARTITION BY "c" EXCLUDE TIES')
self.assertEqual(window.params, ())
def test_window_invalid_exclude(self):
with self.assertRaises(ValueError):
Window([Table('t').c], exclude='foo')
def test_window_rows(self):
t = Table('t')
window = Window([t.c], frame='ROWS')
self.assertEqual(str(window),
'PARTITION BY "c" ROWS '
'BETWEEN UNBOUNDED PRECEDING AND CURRENT ROW')
self.assertEqual(window.params, ())
def test_window_groups(self):
t = Table('t')
window = Window([t.c], frame='GROUPS')
self.assertEqual(str(window),
'PARTITION BY "c" GROUPS '
'BETWEEN UNBOUNDED PRECEDING AND CURRENT ROW')
self.assertEqual(window.params, ())
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