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import copy
import unittest
from scrapy.utils.datatypes import PriorityQueue, PriorityStack, CaselessDict
# (ITEM, PRIORITY)
INPUT = [(1, -5), (30, -1), (80, -3), (4, 1), (6, 3), (20, 0), (50, -1)]
class PriorityQueueTestCase(unittest.TestCase):
output = [(1, -5), (80, -3), (30, -1), (50, -1), (20, 0), (4, 1), (6, 3)]
def test_popping(self):
pq = PriorityQueue()
for item, pr in INPUT:
pq.push(item, pr)
l = []
while pq:
l.append(pq.pop())
self.assertEquals(l, self.output)
def test_iter(self):
pq = PriorityQueue()
for item, pr in INPUT:
pq.push(item, pr)
result = [x for x in pq]
self.assertEquals(result, self.output)
def test_nonzero(self):
pq = PriorityQueue()
pq.push(80, -1)
pq.push(20, 0)
pq.push(30, 1)
pq.pop()
self.assertEquals(bool(pq), True)
pq.pop()
self.assertEquals(bool(pq), True)
pq.pop()
self.assertEquals(bool(pq), False)
def test_len(self):
pq = PriorityQueue()
pq.push(80, -1)
pq.push(20, 0)
pq.push(30, 1)
self.assertEquals(len(pq), 3)
pq.pop()
self.assertEquals(len(pq), 2)
pq.pop()
self.assertEquals(len(pq), 1)
pq.pop()
self.assertEquals(len(pq), 0)
class PriorityStackTestCase(unittest.TestCase):
output = [(1, -5), (80, -3), (50, -1), (30, -1), (20, 0), (4, 1), (6, 3)]
def test_popping(self):
pq = PriorityStack()
for item, pr in INPUT:
pq.push(item, pr)
l = []
while pq:
l.append(pq.pop())
self.assertEquals(l, self.output)
def test_iter(self):
pq = PriorityStack()
for item, pr in INPUT:
pq.push(item, pr)
result = [x for x in pq]
self.assertEquals(result, self.output)
class CaselessDictTest(unittest.TestCase):
def test_init(self):
seq = {'red': 1, 'black': 3}
d = CaselessDict(seq)
self.assertEqual(d['red'], 1)
self.assertEqual(d['black'], 3)
seq = (('red', 1), ('black', 3))
d = CaselessDict(seq)
self.assertEqual(d['red'], 1)
self.assertEqual(d['black'], 3)
def test_caseless(self):
d = CaselessDict()
d['key_Lower'] = 1
self.assertEqual(d['KEy_loWer'], 1)
self.assertEqual(d.get('KEy_loWer'), 1)
d['KEY_LOWER'] = 3
self.assertEqual(d['key_Lower'], 3)
self.assertEqual(d.get('key_Lower'), 3)
def test_delete(self):
d = CaselessDict({'key_lower': 1})
del d['key_LOWER']
self.assertRaises(KeyError, d.__getitem__, 'key_LOWER')
self.assertRaises(KeyError, d.__getitem__, 'key_lower')
def test_getdefault(self):
d = CaselessDict()
self.assertEqual(d.get('c', 5), 5)
d['c'] = 10
self.assertEqual(d.get('c', 5), 10)
def test_setdefault(self):
d = CaselessDict({'a': 1, 'b': 2})
r = d.setdefault('A', 5)
self.assertEqual(r, 1)
self.assertEqual(d['A'], 1)
r = d.setdefault('c', 5)
self.assertEqual(r, 5)
self.assertEqual(d['C'], 5)
def test_fromkeys(self):
keys = ('a', 'b')
d = CaselessDict.fromkeys(keys)
self.assertEqual(d['A'], None)
self.assertEqual(d['B'], None)
d = CaselessDict.fromkeys(keys, 1)
self.assertEqual(d['A'], 1)
self.assertEqual(d['B'], 1)
instance = CaselessDict()
d = instance.fromkeys(keys)
self.assertEqual(d['A'], None)
self.assertEqual(d['B'], None)
d = instance.fromkeys(keys, 1)
self.assertEqual(d['A'], 1)
self.assertEqual(d['B'], 1)
def test_contains(self):
d = CaselessDict()
d['a'] = 1
assert 'a' in d
assert d.has_key('a')
def test_pop(self):
d = CaselessDict()
d['a'] = 1
self.assertEqual(d.pop('A'), 1)
self.assertRaises(KeyError, d.pop, 'A')
def test_normkey(self):
class MyDict(CaselessDict):
def normkey(self, key):
return key.title()
d = MyDict()
d['key-one'] = 2
self.assertEqual(list(d.keys()), ['Key-One'])
def test_normvalue(self):
class MyDict(CaselessDict):
def normvalue(self, value):
if value is not None:
return value + 1
d = MyDict({'key': 1})
self.assertEqual(d['key'], 2)
self.assertEqual(d.get('key'), 2)
d = MyDict()
d['key'] = 1
self.assertEqual(d['key'], 2)
self.assertEqual(d.get('key'), 2)
d = MyDict()
d.setdefault('key', 1)
self.assertEqual(d['key'], 2)
self.assertEqual(d.get('key'), 2)
d = MyDict()
d.update({'key': 1})
self.assertEqual(d['key'], 2)
self.assertEqual(d.get('key'), 2)
d = MyDict.fromkeys(('key',), 1)
self.assertEqual(d['key'], 2)
self.assertEqual(d.get('key'), 2)
def test_copy(self):
h1 = CaselessDict({'header1': 'value'})
h2 = copy.copy(h1)
self.assertEqual(h1, h2)
self.assertEqual(h1.get('header1'), h2.get('header1'))
assert isinstance(h2, CaselessDict)
if __name__ == "__main__":
unittest.main()
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