""" Tests common to tuple, list and UserList.UserList """ import unittest from test import test_support # Various iterables # This is used for checking the constructor (here and in test_deque.py) def iterfunc(seqn): 'Regular generator' for i in seqn: yield i class Sequence: 'Sequence using __getitem__' def __init__(self, seqn): self.seqn = seqn def __getitem__(self, i): return self.seqn[i] class IterFunc: '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 IterGen: '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 IterNextOnly: '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 IterNoNext: 'Iterator missing __next__()' def __init__(self, seqn): self.seqn = seqn self.i = 0 def __iter__(self): return self class IterGenExc: '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 IterFuncStop: 'Test immediate stop' def __init__(self, seqn): pass def __iter__(self): return self def __next__(self): raise StopIteration from itertools import chain, imap def itermulti(seqn): 'Test multiple tiers of iterators' return chain(imap(lambda x:x, iterfunc(IterGen(Sequence(seqn))))) class CommonTest(unittest.TestCase): # The type to be tested type2test = None def test_constructors(self): l0 = [] l1 = [0] l2 = [0, 1] u = self.type2test() u0 = self.type2test(l0) u1 = self.type2test(l1) u2 = self.type2test(l2) uu = self.type2test(u) uu0 = self.type2test(u0) uu1 = self.type2test(u1) uu2 = self.type2test(u2) v = self.type2test(tuple(u)) class OtherSeq: def __init__(self, initseq): self.__data = initseq def __len__(self): return len(self.__data) def __getitem__(self, i): return self.__data[i] s = OtherSeq(u0) v0 = self.type2test(s) self.assertEqual(len(v0), len(s)) s = "this is also a sequence" vv = self.type2test(s) self.assertEqual(len(vv), len(s)) # Create from various iteratables for s in ("123", "", range(1000), ('do', 1.2), range(2000,2200,5)): for g in (Sequence, IterFunc, IterGen, itermulti, iterfunc): self.assertEqual(self.type2test(g(s)), self.type2test(s)) self.assertEqual(self.type2test(IterFuncStop(s)), self.type2test()) self.assertEqual(self.type2test(c for c in "123"), self.type2test("123")) self.assertRaises(TypeError, self.type2test, IterNextOnly(s)) self.assertRaises(TypeError, self.type2test, IterNoNext(s)) self.assertRaises(ZeroDivisionError, self.type2test, IterGenExc(s)) def test_truth(self): self.assert_(not self.type2test()) self.assert_(self.type2test([42])) def test_getitem(self): u = self.type2test([0, 1, 2, 3, 4]) for i in range(len(u)): self.assertEqual(u[i], i) self.assertEqual(u[int(i)], i) for i in range(-len(u), -1): self.assertEqual(u[i], len(u)+i) self.assertEqual(u[int(i)], len(u)+i) self.assertRaises(IndexError, u.__getitem__, -len(u)-1) self.assertRaises(IndexError, u.__getitem__, len(u)) self.assertRaises(ValueError, u.__getitem__, slice(0,10,0)) u = self.type2test() self.assertRaises(IndexError, u.__getitem__, 0) self.assertRaises(IndexError, u.__getitem__, -1) self.assertRaises(TypeError, u.__getitem__) a = self.type2test([10, 11]) self.assertEqual(a[0], 10) self.assertEqual(a[1], 11) self.assertEqual(a[-2], 10) self.assertEqual(a[-1], 11) self.assertRaises(IndexError, a.__getitem__, -3) self.assertRaises(IndexError, a.__getitem__, 3) def test_getslice(self): l = [0, 1, 2, 3, 4] u = self.type2test(l) self.assertEqual(u[0:0], self.type2test()) self.assertEqual(u[1:2], self.type2test([1])) self.assertEqual(u[-2:-1], self.type2test([3])) self.assertEqual(u[-1000:1000], u) self.assertEqual(u[1000:-1000], self.type2test([])) self.assertEqual(u[:], u) self.assertEqual(u[1:None], self.type2test([1, 2, 3, 4])) self.assertEqual(u[None:3], self.type2test([0, 1, 2])) # Extended slices self.assertEqual(u[::], u) self.assertEqual(u[::2], self.type2test([0, 2, 4])) self.assertEqual(u[1::2], self.type2test([1, 3])) self.assertEqual(u[::-1], self.type2test([4, 3, 2, 1, 0])) self.assertEqual(u[::-2], self.type2test([4, 2, 0])) self.assertEqual(u[3::-2], self.type2test([3, 1])) self.assertEqual(u[3:3:-2], self.type2test([])) self.assertEqual(u[3:2:-2], self.type2test([3])) self.assertEqual(u[3:1:-2], self.type2test([3])) self.assertEqual(u[3:0:-2], self.type2test([3, 1])) self.assertEqual(u[::-100], self.type2test([4])) self.assertEqual(u[100:-100:], self.type2test([])) self.assertEqual(u[-100:100:], u) self.assertEqual(u[100:-100:-1], u[::-1]) self.assertEqual(u[-100:100:-1], self.type2test([])) self.assertEqual(u[-100:100:2], self.type2test([0, 2, 4])) # Test extreme cases with long ints a = self.type2test([0,1,2,3,4]) self.assertEqual(a[ -pow(2,128): 3 ], self.type2test([0,1,2])) self.assertEqual(a[ 3: pow(2,145) ], self.type2test([3,4])) def test_contains(self): u = self.type2test([0, 1, 2]) for i in u: self.assert_(i in u) for i in min(u)-1, max(u)+1: self.assert_(i not in u) self.assertRaises(TypeError, u.__contains__) def test_contains_fake(self): class AllEq: # Sequences must use rich comparison against each item # (unless "is" is true, or an earlier item answered) # So instances of AllEq must be found in all non-empty sequences. def __eq__(self, other): return True def __hash__(self): raise NotImplemented self.assert_(AllEq() not in self.type2test([])) self.assert_(AllEq() in self.type2test([1])) def test_contains_order(self): # Sequences must test in-order. If a rich comparison has side # effects, these will be visible to tests against later members. # In this test, the "side effect" is a short-circuiting raise. class DoNotTestEq(Exception): pass class StopCompares: def __eq__(self, other): raise DoNotTestEq checkfirst = self.type2test([1, StopCompares()]) self.assert_(1 in checkfirst) checklast = self.type2test([StopCompares(), 1]) self.assertRaises(DoNotTestEq, checklast.__contains__, 1) def test_len(self): self.assertEqual(len(self.type2test()), 0) self.assertEqual(len(self.type2test([])), 0) self.assertEqual(len(self.type2test([0])), 1) self.assertEqual(len(self.type2test([0, 1, 2])), 3) def test_minmax(self): u = self.type2test([0, 1, 2]) self.assertEqual(min(u), 0) self.assertEqual(max(u), 2) def test_addmul(self): u1 = self.type2test([0]) u2 = self.type2test([0, 1]) self.assertEqual(u1, u1 + self.type2test()) self.assertEqual(u1, self.type2test() + u1) self.assertEqual(u1 + self.type2test([1]), u2) self.assertEqual(self.type2test([-1]) + u1, self.type2test([-1, 0])) self.assertEqual(self.type2test(), u2*0) self.assertEqual(self.type2test(), 0*u2) self.assertEqual(self.type2test(), u2*0) self.assertEqual(self.type2test(), 0*u2) self.assertEqual(u2, u2*1) self.assertEqual(u2, 1*u2) self.assertEqual(u2, u2*1) self.assertEqual(u2, 1*u2) self.assertEqual(u2+u2, u2*2) self.assertEqual(u2+u2, 2*u2) self.assertEqual(u2+u2, u2*2) self.assertEqual(u2+u2, 2*u2) self.assertEqual(u2+u2+u2, u2*3) self.assertEqual(u2+u2+u2, 3*u2) class subclass(self.type2test): pass u3 = subclass([0, 1]) self.assertEqual(u3, u3*1) self.assert_(u3 is not u3*1) def test_iadd(self): u = self.type2test([0, 1]) u += self.type2test() self.assertEqual(u, self.type2test([0, 1])) u += self.type2test([2, 3]) self.assertEqual(u, self.type2test([0, 1, 2, 3])) u += self.type2test([4, 5]) self.assertEqual(u, self.type2test([0, 1, 2, 3, 4, 5])) u = self.type2test("spam") u += self.type2test("eggs") self.assertEqual(u, self.type2test("spameggs")) def test_imul(self): u = self.type2test([0, 1]) u *= 3 self.assertEqual(u, self.type2test([0, 1, 0, 1, 0, 1])) def test_getitemoverwriteiter(self): # Verify that __getitem__ overrides are not recognized by __iter__ class T(self.type2test): def __getitem__(self, key): return str(key) + '!!!' self.assertEqual(next(iter(T((1,2)))), 1) def test_repeat(self): for m in range(4): s = tuple(range(m)) for n in range(-3, 5): self.assertEqual(self.type2test(s*n), self.type2test(s)*n) self.assertEqual(self.type2test(s)*(-4), self.type2test([])) self.assertEqual(id(s), id(s*1)) def test_subscript(self): a = self.type2test([10, 11]) self.assertEqual(a.__getitem__(0), 10) self.assertEqual(a.__getitem__(1), 11) self.assertEqual(a.__getitem__(-2), 10) self.assertEqual(a.__getitem__(-1), 11) self.assertRaises(IndexError, a.__getitem__, -3) self.assertRaises(IndexError, a.__getitem__, 3) self.assertEqual(a.__getitem__(slice(0,1)), self.type2test([10])) self.assertEqual(a.__getitem__(slice(1,2)), self.type2test([11])) self.assertEqual(a.__getitem__(slice(0,2)), self.type2test([10, 11])) self.assertEqual(a.__getitem__(slice(0,3)), self.type2test([10, 11])) self.assertEqual(a.__getitem__(slice(3,5)), self.type2test([])) self.assertRaises(ValueError, a.__getitem__, slice(0, 10, 0)) self.assertRaises(TypeError, a.__getitem__, 'x')