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import unittest
from decimal import Decimal
from agate.utils import Quantiles, letter_name, round_limits
class TestQuantiles(unittest.TestCase):
def setUp(self):
self.values = [0, 10, 20, 30, 40, 50]
self.quantiles = Quantiles(self.values)
def test_methods(self):
self.assertEqual(len(self.quantiles), 6)
self.assertEqual(self.quantiles[2], 20)
self.assertSequenceEqual(list(self.quantiles), self.values)
self.assertEqual(repr(self.quantiles), repr(self.values))
def test_locate(self):
self.assertEqual(self.quantiles.locate(25), 2)
self.assertEqual(self.quantiles.locate(40), 4)
with self.assertRaises(ValueError):
self.quantiles.locate(-10)
with self.assertRaises(ValueError):
self.quantiles.locate(51)
class TestMisc(unittest.TestCase):
def test_round_limits(self):
self.assertEqual(
round_limits(Decimal('-2.7'), Decimal('2.7')),
(Decimal('-3'), Decimal('3'))
)
self.assertEqual(
round_limits(Decimal('-2.2'), Decimal('2.2')),
(Decimal('-3'), Decimal('3'))
)
self.assertEqual(
round_limits(Decimal('-2.22'), Decimal('2.22')),
(Decimal('-3'), Decimal('3'))
)
self.assertEqual(
round_limits(Decimal('0'), Decimal('75')),
(Decimal('0'), Decimal('80'))
)
self.assertEqual(
round_limits(Decimal('45'), Decimal('300')),
(Decimal('0'), Decimal('300'))
)
self.assertEqual(
round_limits(Decimal('200.75'), Decimal('715.345')),
(Decimal('200'), Decimal('800'))
)
self.assertEqual(
round_limits(Decimal('0.75'), Decimal('0.800')),
(Decimal('0'), Decimal('1'))
)
self.assertEqual(
round_limits(Decimal('-0.505'), Decimal('0.47')),
(Decimal('-0.6'), Decimal('0.5'))
)
def test_letter_name(self):
self.assertEqual(letter_name(0), 'a')
self.assertEqual(letter_name(4), 'e')
self.assertEqual(letter_name(25), 'z')
self.assertEqual(letter_name(30), 'ee')
self.assertEqual(letter_name(77), 'zzz')
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