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//usr/local/lib/python3.9/test/mapping_tests.py
# tests common to dict and UserDict import unittest import collections import sys class BasicTestMappingProtocol(unittest.TestCase): # This base class can be used to check that an object conforms to the # mapping protocol # Functions that can be useful to override to adapt to dictionary # semantics type2test = None # which class is being tested (overwrite in subclasses) def _reference(self): """Return a dictionary of values which are invariant by storage in the object under test.""" return {"1": "2", "key1":"value1", "key2":(1,2,3)} def _empty_mapping(self): """Return an empty mapping object""" return self.type2test() def _full_mapping(self, data): """Return a mapping object with the value contained in data dictionary""" x = self._empty_mapping() for key, value in data.items(): x[key] = value return x def __init__(self, *args, **kw): unittest.TestCase.__init__(self, *args, **kw) self.reference = self._reference().copy() # A (key, value) pair not in the mapping key, value = self.reference.popitem() self.other = {key:value} # A (key, value) pair in the mapping key, value = self.reference.popitem() self.inmapping = {key:value} self.reference[key] = value def test_read(self): # Test for read only operations on mapping p = self._empty_mapping() p1 = dict(p) #workaround for singleton objects d = self._full_mapping(self.reference) if d is p: p = p1 #Indexing for key, value in self.reference.items(): self.assertEqual(d[key], value) knownkey = list(self.other.keys())[0] self.assertRaises(KeyError, lambda:d[knownkey]) #len self.assertEqual(len(p), 0) self.assertEqual(len(d), len(self.reference)) #__contains__ for k in self.reference: self.assertIn(k, d) for k in self.other: self.assertNotIn(k, d) #cmp self.assertEqual(p, p) self.assertEqual(d, d) self.assertNotEqual(p, d) self.assertNotEqual(d, p) #bool if p: self.fail("Empty mapping must compare to False") if not d: self.fail("Full mapping must compare to True") # keys(), items(), iterkeys() ... def check_iterandlist(iter, lst, ref): self.assertTrue(hasattr(iter, '__next__')) self.assertTrue(hasattr(iter, '__iter__')) x = list(iter) self.assertTrue(set(x)==set(lst)==set(ref)) check_iterandlist(iter(d.keys()), list(d.keys()), self.reference.keys()) check_iterandlist(iter(d), list(d.keys()), self.reference.keys()) check_iterandlist(iter(d.values()), list(d.values()), self.reference.values()) check_iterandlist(iter(d.items()), list(d.items()), self.reference.items()) #get key, value = next(iter(d.items())) knownkey, knownvalue = next(iter(self.other.items())) self.assertEqual(d.get(key, knownvalue), value) self.assertEqual(d.get(knownkey, knownvalue), knownvalue) self.assertNotIn(knownkey, d) def test_write(self): # Test for write operations on mapping p = self._empty_mapping() #Indexing for key, value in self.reference.items(): p[key] = value self.assertEqual(p[key], value) for key in self.reference.keys(): del p[key] self.assertRaises(KeyError, lambda:p[key]) p = self._empty_mapping() #update p.update(self.reference) self.assertEqual(dict(p), self.reference) items = list(p.items()) p = self._empty_mapping() p.update(items) self.assertEqual(dict(p), self.reference) d = self._full_mapping(self.reference) #setdefault key, value = next(iter(d.items())) knownkey, knownvalue = next(iter(self.other.items())) self.assertEqual(d.setdefault(key, knownvalue), value) self.assertEqual(d[key], value) self.assertEqual(d.setdefault(knownkey, knownvalue), knownvalue) self.assertEqual(d[knownkey], knownvalue) #pop self.assertEqual(d.pop(knownkey), knownvalue) self.assertNotIn(knownkey, d) self.assertRaises(KeyError, d.pop, knownkey) default = 909 d[knownkey] = knownvalue self.assertEqual(d.pop(knownkey, default), knownvalue) self.assertNotIn(knownkey, d) self.assertEqual(d.pop(knownkey, default), default) #popitem key, value = d.popitem() self.assertNotIn(key, d) self.assertEqual(value, self.reference[key]) p=self._empty_mapping() self.assertRaises(KeyError, p.popitem) def test_constructor(self): self.assertEqual(self._empty_mapping(), self._empty_mapping()) def test_bool(self): self.assertTrue(not self._empty_mapping()) self.assertTrue(self.reference) self.assertTrue(bool(self._empty_mapping()) is False) self.assertTrue(bool(self.reference) is True) def test_keys(self): d = self._empty_mapping() self.assertEqual(list(d.keys()), []) d = self.reference self.assertIn(list(self.inmapping.keys())[0], d.keys()) self.assertNotIn(list(self.other.keys())[0], d.keys()) self.assertRaises(TypeError, d.keys, None) def test_values(self): d = self._empty_mapping() self.assertEqual(list(d.values()), []) self.assertRaises(TypeError, d.values, None) def test_items(self): d = self._empty_mapping() self.assertEqual(list(d.items()), []) self.assertRaises(TypeError, d.items, None) def test_len(self): d = self._empty_mapping() self.assertEqual(len(d), 0) def test_getitem(self): d = self.reference self.assertEqual(d[list(self.inmapping.keys())[0]], list(self.inmapping.values())[0]) self.assertRaises(TypeError, d.__getitem__) def test_update(self): # mapping argument d = self._empty_mapping() d.update(self.other) self.assertEqual(list(d.items()), list(self.other.items())) # No argument d = self._empty_mapping() d.update() self.assertEqual(d, self._empty_mapping()) # item sequence d = self._empty_mapping() d.update(self.other.items()) self.assertEqual(list(d.items()), list(self.other.items())) # Iterator d = self._empty_mapping() d.update(self.other.items()) self.assertEqual(list(d.items()), list(self.other.items())) # FIXME: Doesn't work with UserDict # self.assertRaises((TypeError, AttributeError), d.update, None) self.assertRaises((TypeError, AttributeError), d.update, 42) outerself = self class SimpleUserDict: def __init__(self): self.d = outerself.reference def keys(self): return self.d.keys() def __getitem__(self, i): return self.d[i] d.clear() d.update(SimpleUserDict()) i1 = sorted(d.items()) i2 = sorted(self.reference.items()) self.assertEqual(i1, i2) class Exc(Exception): pass d = self._empty_mapping() class FailingUserDict: def keys(self): raise Exc self.assertRaises(Exc, d.update, FailingUserDict()) d.clear() class FailingUserDict: def keys(self): class BogonIter: def __init__(self): self.i = 1 def __iter__(self): return self def __next__(self): if self.i: self.i = 0 return 'a' raise Exc return BogonIter() def __getitem__(self, key): return key self.assertRaises(Exc, d.update, FailingUserDict()) class FailingUserDict: def keys(self): class BogonIter: def __init__(self): self.i = ord('a') def __iter__(self): return self def __next__(self): if self.i <= ord('z'): rtn = chr(self.i) self.i += 1 return rtn raise StopIteration return BogonIter() def __getitem__(self, key): raise Exc self.assertRaises(Exc, d.update, FailingUserDict()) d = self._empty_mapping() class badseq(object): def __iter__(self): return self def __next__(self): raise Exc() self.assertRaises(Exc, d.update, badseq()) self.assertRaises(ValueError, d.update, [(1, 2, 3)]) # no test_fromkeys or test_copy as both os.environ and selves don't support it def test_get(self): d = self._empty_mapping() self.assertTrue(d.get(list(self.other.keys())[0]) is None) self.assertEqual(d.get(list(self.other.keys())[0], 3), 3) d = self.reference self.assertTrue(d.get(list(self.other.keys())[0]) is None) self.assertEqual(d.get(list(self.other.keys())[0], 3), 3) self.assertEqual(d.get(list(self.inmapping.keys())[0]), list(self.inmapping.values())[0]) self.assertEqual(d.get(list(self.inmapping.keys())[0], 3), list(self.inmapping.values())[0]) self.assertRaises(TypeError, d.get) self.assertRaises(TypeError, d.get, None, None, None) def test_setdefault(self): d = self._empty_mapping() self.assertRaises(TypeError, d.setdefault) def test_popitem(self): d = self._empty_mapping() self.assertRaises(KeyError, d.popitem) self.assertRaises(TypeError, d.popitem, 42) def test_pop(self): d = self._empty_mapping() k, v = list(self.inmapping.items())[0] d[k] = v self.assertRaises(KeyError, d.pop, list(self.other.keys())[0]) self.assertEqual(d.pop(k), v) self.assertEqual(len(d), 0) self.assertRaises(KeyError, d.pop, k) class TestMappingProtocol(BasicTestMappingProtocol): def test_constructor(self): BasicTestMappingProtocol.test_constructor(self) self.assertTrue(self._empty_mapping() is not self._empty_mapping()) self.assertEqual(self.type2test(x=1, y=2), {"x": 1, "y": 2}) def test_bool(self): BasicTestMappingProtocol.test_bool(self) self.assertTrue(not self._empty_mapping()) self.assertTrue(self._full_mapping({"x": "y"})) self.assertTrue(bool(self._empty_mapping()) is False) self.assertTrue(bool(self._full_mapping({"x": "y"})) is True) def test_keys(self): BasicTestMappingProtocol.test_keys(self) d = self._empty_mapping() self.assertEqual(list(d.keys()), []) d = self._full_mapping({'a': 1, 'b': 2}) k = d.keys() self.assertIn('a', k) self.assertIn('b', k) self.assertNotIn('c', k) def test_values(self): BasicTestMappingProtocol.test_values(self) d = self._full_mapping({1:2}) self.assertEqual(list(d.values()), [2]) def test_items(self): BasicTestMappingProtocol.test_items(self) d = self._full_mapping({1:2}) self.assertEqual(list(d.items()), [(1, 2)]) def test_contains(self): d = self._empty_mapping() self.assertNotIn('a', d) self.assertTrue(not ('a' in d)) self.assertTrue('a' not in d) d = self._full_mapping({'a': 1, 'b': 2}) self.assertIn('a', d) self.assertIn('b', d) self.assertNotIn('c', d) self.assertRaises(TypeError, d.__contains__) def test_len(self): BasicTestMappingProtocol.test_len(self) d = self._full_mapping({'a': 1, 'b': 2}) self.assertEqual(len(d), 2) def test_getitem(self): BasicTestMappingProtocol.test_getitem(self) d = self._full_mapping({'a': 1, 'b': 2}) self.assertEqual(d['a'], 1) self.assertEqual(d['b'], 2) d['c'] = 3 d['a'] = 4 self.assertEqual(d['c'], 3) self.assertEqual(d['a'], 4) del d['b'] self.assertEqual(d, {'a': 4, 'c': 3}) self.assertRaises(TypeError, d.__getitem__) def test_clear(self): d = self._full_mapping({1:1, 2:2, 3:3}) d.clear() self.assertEqual(d, {}) self.assertRaises(TypeError, d.clear, None) def test_update(self): BasicTestMappingProtocol.test_update(self) # mapping argument d = self._empty_mapping() d.update({1:100}) d.update({2:20}) d.update({1:1, 2:2, 3:3}) self.assertEqual(d, {1:1, 2:2, 3:3}) # no argument d.update() self.assertEqual(d, {1:1, 2:2, 3:3}) # keyword arguments d = self._empty_mapping() d.update(x=100) d.update(y=20) d.update(x=1, y=2, z=3) self.assertEqual(d, {"x":1, "y":2, "z":3}) # item sequence d = self._empty_mapping() d.update([("x", 100), ("y", 20)]) self.assertEqual(d, {"x":100, "y":20}) # Both item sequence and keyword arguments d = self._empty_mapping() d.update([("x", 100), ("y", 20)], x=1, y=2) self.assertEqual(d, {"x":1, "y":2}) # iterator d = self._full_mapping({1:3, 2:4}) d.update(self._full_mapping({1:2, 3:4, 5:6}).items()) self.assertEqual(d, {1:2, 2:4, 3:4, 5:6}) class SimpleUserDict: def __init__(self): self.d = {1:1, 2:2, 3:3} def keys(self): return self.d.keys() def __getitem__(self, i): return self.d[i] d.clear() d.update(SimpleUserDict()) self.assertEqual(d, {1:1, 2:2, 3:3}) def test_fromkeys(self): self.assertEqual(self.type2test.fromkeys('abc'), {'a':None, 'b':None, 'c':None}) d = self._empty_mapping() self.assertTrue(not(d.fromkeys('abc') is d)) self.assertEqual(d.fromkeys('abc'), {'a':None, 'b':None, 'c':None}) self.assertEqual(d.fromkeys((4,5),0), {4:0, 5:0}) self.assertEqual(d.fromkeys([]), {}) def g(): yield 1 self.assertEqual(d.fromkeys(g()), {1:None}) self.assertRaises(TypeError, {}.fromkeys, 3) class dictlike(self.type2test): pass self.assertEqual(dictlike.fromkeys('a'), {'a':None}) self.assertEqual(dictlike().fromkeys('a'), {'a':None}) self.assertTrue(dictlike.fromkeys('a').__class__ is dictlike) self.assertTrue(dictlike().fromkeys('a').__class__ is dictlike) self.assertTrue(type(dictlike.fromkeys('a')) is dictlike) class mydict(self.type2test): def __new__(cls): return collections.UserDict() ud = mydict.fromkeys('ab') self.assertEqual(ud, {'a':None, 'b':None}) self.assertIsInstance(ud, collections.UserDict) self.assertRaises(TypeError, dict.fromkeys) class Exc(Exception): pass class baddict1(self.type2test): def __init__(self, *args, **kwargs): raise Exc() self.assertRaises(Exc, baddict1.fromkeys, [1]) class BadSeq(object): def __iter__(self): return self def __next__(self): raise Exc() self.assertRaises(Exc, self.type2test.fromkeys, BadSeq()) class baddict2(self.type2test): def __setitem__(self, key, value): raise Exc() self.assertRaises(Exc, baddict2.fromkeys, [1]) def test_copy(self): d = self._full_mapping({1:1, 2:2, 3:3}) self.assertEqual(d.copy(), {1:1, 2:2, 3:3}) d = self._empty_mapping() self.assertEqual(d.copy(), d) self.assertIsInstance(d.copy(), d.__class__) self.assertRaises(TypeError, d.copy, None) def test_get(self): BasicTestMappingProtocol.test_get(self) d = self._empty_mapping() self.assertTrue(d.get('c') is None) self.assertEqual(d.get('c', 3), 3) d = self._full_mapping({'a' : 1, 'b' : 2}) self.assertTrue(d.get('c') is None) self.assertEqual(d.get('c', 3), 3) self.assertEqual(d.get('a'), 1) self.assertEqual(d.get('a', 3), 1) def test_setdefault(self): BasicTestMappingProtocol.test_setdefault(self) d = self._empty_mapping() self.assertTrue(d.setdefault('key0') is None) d.setdefault('key0', []) self.assertTrue(d.setdefault('key0') is None) d.setdefault('key', []).append(3) self.assertEqual(d['key'][0], 3) d.setdefault('key', []).append(4) self.assertEqual(len(d['key']), 2) def test_popitem(self): BasicTestMappingProtocol.test_popitem(self) for copymode in -1, +1: # -1: b has same structure as a # +1: b is a.copy() for log2size in range(12): size = 2**log2size a = self._empty_mapping() b = self._empty_mapping() for i in range(size): a[repr(i)] = i if copymode < 0: b[repr(i)] = i if copymode > 0: b = a.copy() for i in range(size): ka, va = ta = a.popitem() self.assertEqual(va, int(ka)) kb, vb = tb = b.popitem() self.assertEqual(vb, int(kb)) self.assertTrue(not(copymode < 0 and ta != tb)) self.assertTrue(not a) self.assertTrue(not b) def test_pop(self): BasicTestMappingProtocol.test_pop(self) # Tests for pop with specified key d = self._empty_mapping() k, v = 'abc', 'def' self.assertEqual(d.pop(k, v), v) d[k] = v self.assertEqual(d.pop(k, 1), v) class TestHashMappingProtocol(TestMappingProtocol): def test_getitem(self): TestMappingProtocol.test_getitem(self) class Exc(Exception): pass class BadEq(object): def __eq__(self, other): raise Exc() def __hash__(self): return 24 d = self._empty_mapping() d[BadEq()] = 42 self.assertRaises(KeyError, d.__getitem__, 23) class BadHash(object): fail = False def __hash__(self): if self.fail: raise Exc() else: return 42 d = self._empty_mapping() x = BadHash() d[x] = 42 x.fail = True self.assertRaises(Exc, d.__getitem__, x) def test_fromkeys(self): TestMappingProtocol.test_fromkeys(self) class mydict(self.type2test): def __new__(cls): return collections.UserDict() ud = mydict.fromkeys('ab') self.assertEqual(ud, {'a':None, 'b':None}) self.assertIsInstance(ud, collections.UserDict) def test_pop(self): TestMappingProtocol.test_pop(self) class Exc(Exception): pass class BadHash(object): fail = False def __hash__(self): if self.fail: raise Exc() else: return 42 d = self._empty_mapping() x = BadHash() d[x] = 42 x.fail = True self.assertRaises(Exc, d.pop, x) def test_mutatingiteration(self): d = self._empty_mapping() d[1] = 1 try: count = 0 for i in d: d[i+1] = 1 if count >= 1: self.fail("changing dict size during iteration doesn't raise Error") count += 1 except RuntimeError: pass def test_repr(self): d = self._empty_mapping() self.assertEqual(repr(d), '{}') d[1] = 2 self.assertEqual(repr(d), '{1: 2}') d = self._empty_mapping() d[1] = d self.assertEqual(repr(d), '{1: {...}}') class Exc(Exception): pass class BadRepr(object): def __repr__(self): raise Exc() d = self._full_mapping({1: BadRepr()}) self.assertRaises(Exc, repr, d) def test_repr_deep(self): d = self._empty_mapping() for i in range(sys.getrecursionlimit() + 100): d0 = d d = self._empty_mapping() d[1] = d0 self.assertRaises(RecursionError, repr, d) def test_eq(self): self.assertEqual(self._empty_mapping(), self._empty_mapping()) self.assertEqual(self._full_mapping({1: 2}), self._full_mapping({1: 2})) class Exc(Exception): pass class BadCmp(object): def __eq__(self, other): raise Exc() def __hash__(self): return 1 d1 = self._full_mapping({BadCmp(): 1}) d2 = self._full_mapping({1: 1}) self.assertRaises(Exc, lambda: BadCmp()==1) self.assertRaises(Exc, lambda: d1==d2) def test_setdefault(self): TestMappingProtocol.test_setdefault(self) class Exc(Exception): pass class BadHash(object): fail = False def __hash__(self): if self.fail: raise Exc() else: return 42 d = self._empty_mapping() x = BadHash() d[x] = 42 x.fail = True self.assertRaises(Exc, d.setdefault, x, [])