| """ |
| Tests common to tuple, list and UserList.UserList |
| """ |
| |
| import unittest |
| import sys |
| |
| # 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 |
| def itermulti(seqn): |
| 'Test multiple tiers of iterators' |
| return chain(map(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.assertFalse(self.type2test()) |
| self.assertTrue(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.assertIn(i, u) |
| for i in min(u)-1, max(u)+1: |
| self.assertNotIn(i, 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 |
| __hash__ = None # Can't meet hash invariant requirements |
| self.assertNotIn(AllEq(), self.type2test([])) |
| self.assertIn(AllEq(), 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.assertIn(1, 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.assertIsNot(u3, 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_bigrepeat(self): |
| import sys |
| if sys.maxsize <= 2147483647: |
| x = self.type2test([0]) |
| x *= 2**16 |
| self.assertRaises(MemoryError, x.__mul__, 2**16) |
| if hasattr(x, '__imul__'): |
| self.assertRaises(MemoryError, x.__imul__, 2**16) |
| |
| 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') |
| |
| def test_count(self): |
| a = self.type2test([0, 1, 2])*3 |
| self.assertEqual(a.count(0), 3) |
| self.assertEqual(a.count(1), 3) |
| self.assertEqual(a.count(3), 0) |
| |
| self.assertRaises(TypeError, a.count) |
| |
| class BadExc(Exception): |
| pass |
| |
| class BadCmp: |
| def __eq__(self, other): |
| if other == 2: |
| raise BadExc() |
| return False |
| |
| self.assertRaises(BadExc, a.count, BadCmp()) |
| |
| def test_index(self): |
| u = self.type2test([0, 1]) |
| self.assertEqual(u.index(0), 0) |
| self.assertEqual(u.index(1), 1) |
| self.assertRaises(ValueError, u.index, 2) |
| |
| u = self.type2test([-2, -1, 0, 0, 1, 2]) |
| self.assertEqual(u.count(0), 2) |
| self.assertEqual(u.index(0), 2) |
| self.assertEqual(u.index(0, 2), 2) |
| self.assertEqual(u.index(-2, -10), 0) |
| self.assertEqual(u.index(0, 3), 3) |
| self.assertEqual(u.index(0, 3, 4), 3) |
| self.assertRaises(ValueError, u.index, 2, 0, -10) |
| |
| self.assertRaises(TypeError, u.index) |
| |
| class BadExc(Exception): |
| pass |
| |
| class BadCmp: |
| def __eq__(self, other): |
| if other == 2: |
| raise BadExc() |
| return False |
| |
| a = self.type2test([0, 1, 2, 3]) |
| self.assertRaises(BadExc, a.index, BadCmp()) |
| |
| a = self.type2test([-2, -1, 0, 0, 1, 2]) |
| self.assertEqual(a.index(0), 2) |
| self.assertEqual(a.index(0, 2), 2) |
| self.assertEqual(a.index(0, -4), 2) |
| self.assertEqual(a.index(-2, -10), 0) |
| self.assertEqual(a.index(0, 3), 3) |
| self.assertEqual(a.index(0, -3), 3) |
| self.assertEqual(a.index(0, 3, 4), 3) |
| self.assertEqual(a.index(0, -3, -2), 3) |
| self.assertEqual(a.index(0, -4*sys.maxsize, 4*sys.maxsize), 2) |
| self.assertRaises(ValueError, a.index, 0, 4*sys.maxsize,-4*sys.maxsize) |
| self.assertRaises(ValueError, a.index, 2, 0, -10) |