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author | cinap_lenrek <cinap_lenrek@localhost> | 2011-05-04 05:41:33 +0000 |
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committer | cinap_lenrek <cinap_lenrek@localhost> | 2011-05-04 05:41:33 +0000 |
commit | b8436b026a90291ba26afa4f7a2700720b03339f (patch) | |
tree | 3098aede87640c80567ecb31022e0404a8b5ec75 /sys/lib/python/test/test_heapq.py | |
parent | 6c1b42188259a6f1636cd15a9570b18af03e2dbb (diff) |
remove python test cases
Diffstat (limited to 'sys/lib/python/test/test_heapq.py')
-rw-r--r-- | sys/lib/python/test/test_heapq.py | 286 |
1 files changed, 0 insertions, 286 deletions
diff --git a/sys/lib/python/test/test_heapq.py b/sys/lib/python/test/test_heapq.py deleted file mode 100644 index e9f27982b..000000000 --- a/sys/lib/python/test/test_heapq.py +++ /dev/null @@ -1,286 +0,0 @@ -"""Unittests for heapq.""" - -from heapq import heappush, heappop, heapify, heapreplace, nlargest, nsmallest -import random -import unittest -from test import test_support -import sys - - -def heapiter(heap): - # An iterator returning a heap's elements, smallest-first. - try: - while 1: - yield heappop(heap) - except IndexError: - pass - -class TestHeap(unittest.TestCase): - - def test_push_pop(self): - # 1) Push 256 random numbers and pop them off, verifying all's OK. - heap = [] - data = [] - self.check_invariant(heap) - for i in range(256): - item = random.random() - data.append(item) - heappush(heap, item) - self.check_invariant(heap) - results = [] - while heap: - item = heappop(heap) - self.check_invariant(heap) - results.append(item) - data_sorted = data[:] - data_sorted.sort() - self.assertEqual(data_sorted, results) - # 2) Check that the invariant holds for a sorted array - self.check_invariant(results) - - self.assertRaises(TypeError, heappush, []) - try: - self.assertRaises(TypeError, heappush, None, None) - self.assertRaises(TypeError, heappop, None) - except AttributeError: - pass - - def check_invariant(self, heap): - # Check the heap invariant. - for pos, item in enumerate(heap): - if pos: # pos 0 has no parent - parentpos = (pos-1) >> 1 - self.assert_(heap[parentpos] <= item) - - def test_heapify(self): - for size in range(30): - heap = [random.random() for dummy in range(size)] - heapify(heap) - self.check_invariant(heap) - - self.assertRaises(TypeError, heapify, None) - - def test_naive_nbest(self): - data = [random.randrange(2000) for i in range(1000)] - heap = [] - for item in data: - heappush(heap, item) - if len(heap) > 10: - heappop(heap) - heap.sort() - self.assertEqual(heap, sorted(data)[-10:]) - - def test_nbest(self): - # Less-naive "N-best" algorithm, much faster (if len(data) is big - # enough <wink>) than sorting all of data. However, if we had a max - # heap instead of a min heap, it could go faster still via - # heapify'ing all of data (linear time), then doing 10 heappops - # (10 log-time steps). - data = [random.randrange(2000) for i in range(1000)] - heap = data[:10] - heapify(heap) - for item in data[10:]: - if item > heap[0]: # this gets rarer the longer we run - heapreplace(heap, item) - self.assertEqual(list(heapiter(heap)), sorted(data)[-10:]) - - self.assertRaises(TypeError, heapreplace, None) - self.assertRaises(TypeError, heapreplace, None, None) - self.assertRaises(IndexError, heapreplace, [], None) - - def test_heapsort(self): - # Exercise everything with repeated heapsort checks - for trial in xrange(100): - size = random.randrange(50) - data = [random.randrange(25) for i in range(size)] - if trial & 1: # Half of the time, use heapify - heap = data[:] - heapify(heap) - else: # The rest of the time, use heappush - heap = [] - for item in data: - heappush(heap, item) - heap_sorted = [heappop(heap) for i in range(size)] - self.assertEqual(heap_sorted, sorted(data)) - - def test_nsmallest(self): - data = [(random.randrange(2000), i) for i in range(1000)] - for f in (None, lambda x: x[0] * 547 % 2000): - for n in (0, 1, 2, 10, 100, 400, 999, 1000, 1100): - self.assertEqual(nsmallest(n, data), sorted(data)[:n]) - self.assertEqual(nsmallest(n, data, key=f), - sorted(data, key=f)[:n]) - - def test_nlargest(self): - data = [(random.randrange(2000), i) for i in range(1000)] - for f in (None, lambda x: x[0] * 547 % 2000): - for n in (0, 1, 2, 10, 100, 400, 999, 1000, 1100): - self.assertEqual(nlargest(n, data), sorted(data, reverse=True)[:n]) - self.assertEqual(nlargest(n, data, key=f), - sorted(data, key=f, reverse=True)[:n]) - - -#============================================================================== - -class LenOnly: - "Dummy sequence class defining __len__ but not __getitem__." - def __len__(self): - return 10 - -class GetOnly: - "Dummy sequence class defining __getitem__ but not __len__." - def __getitem__(self, ndx): - return 10 - -class CmpErr: - "Dummy element that always raises an error during comparison" - def __cmp__(self, other): - raise ZeroDivisionError - -def R(seqn): - 'Regular generator' - for i in seqn: - yield i - -class G: - 'Sequence using __getitem__' - def __init__(self, seqn): - self.seqn = seqn - def __getitem__(self, i): - return self.seqn[i] - -class I: - 'Sequence using iterator protocol' - def __init__(self, seqn): - self.seqn = seqn - self.i = 0 - def __iter__(self): - return self - def next(self): - if self.i >= len(self.seqn): raise StopIteration - v = self.seqn[self.i] - self.i += 1 - return v - -class Ig: - 'Sequence using iterator protocol defined with a generator' - def __init__(self, seqn): - self.seqn = seqn - self.i = 0 - def __iter__(self): - for val in self.seqn: - yield val - -class X: - 'Missing __getitem__ and __iter__' - def __init__(self, seqn): - self.seqn = seqn - self.i = 0 - def next(self): - if self.i >= len(self.seqn): raise StopIteration - v = self.seqn[self.i] - self.i += 1 - return v - -class N: - 'Iterator missing next()' - def __init__(self, seqn): - self.seqn = seqn - self.i = 0 - def __iter__(self): - return self - -class E: - 'Test propagation of exceptions' - def __init__(self, seqn): - self.seqn = seqn - self.i = 0 - def __iter__(self): - return self - def next(self): - 3 // 0 - -class S: - 'Test immediate stop' - def __init__(self, seqn): - pass - def __iter__(self): - return self - def next(self): - raise StopIteration - -from itertools import chain, imap -def L(seqn): - 'Test multiple tiers of iterators' - return chain(imap(lambda x:x, R(Ig(G(seqn))))) - -class TestErrorHandling(unittest.TestCase): - - def test_non_sequence(self): - for f in (heapify, heappop): - self.assertRaises(TypeError, f, 10) - for f in (heappush, heapreplace, nlargest, nsmallest): - self.assertRaises(TypeError, f, 10, 10) - - def test_len_only(self): - for f in (heapify, heappop): - self.assertRaises(TypeError, f, LenOnly()) - for f in (heappush, heapreplace): - self.assertRaises(TypeError, f, LenOnly(), 10) - for f in (nlargest, nsmallest): - self.assertRaises(TypeError, f, 2, LenOnly()) - - def test_get_only(self): - for f in (heapify, heappop): - self.assertRaises(TypeError, f, GetOnly()) - for f in (heappush, heapreplace): - self.assertRaises(TypeError, f, GetOnly(), 10) - for f in (nlargest, nsmallest): - self.assertRaises(TypeError, f, 2, GetOnly()) - - def test_get_only(self): - seq = [CmpErr(), CmpErr(), CmpErr()] - for f in (heapify, heappop): - self.assertRaises(ZeroDivisionError, f, seq) - for f in (heappush, heapreplace): - self.assertRaises(ZeroDivisionError, f, seq, 10) - for f in (nlargest, nsmallest): - self.assertRaises(ZeroDivisionError, f, 2, seq) - - def test_arg_parsing(self): - for f in (heapify, heappop, heappush, heapreplace, nlargest, nsmallest): - self.assertRaises(TypeError, f, 10) - - def test_iterable_args(self): - for f in (nlargest, nsmallest): - for s in ("123", "", range(1000), ('do', 1.2), xrange(2000,2200,5)): - for g in (G, I, Ig, L, R): - self.assertEqual(f(2, g(s)), f(2,s)) - self.assertEqual(f(2, S(s)), []) - self.assertRaises(TypeError, f, 2, X(s)) - self.assertRaises(TypeError, f, 2, N(s)) - self.assertRaises(ZeroDivisionError, f, 2, E(s)) - -#============================================================================== - - -def test_main(verbose=None): - from types import BuiltinFunctionType - - test_classes = [TestHeap] - if isinstance(heapify, BuiltinFunctionType): - test_classes.append(TestErrorHandling) - test_support.run_unittest(*test_classes) - - # verify reference counting - if verbose and hasattr(sys, "gettotalrefcount"): - import gc - counts = [None] * 5 - for i in xrange(len(counts)): - test_support.run_unittest(*test_classes) - gc.collect() - counts[i] = sys.gettotalrefcount() - print counts - -if __name__ == "__main__": - test_main(verbose=True) |