import concurrent.futures
import contextvars
import functools
import gc
import random
import time
import unittest
import weakref
from test import support
from test.support import threading_helper
try:
from _testinternalcapi import hamt
except ImportError:
hamt = None
def isolated_context(func):
"""Needed to make reftracking test mode work."""
@functools.wraps(func)
def wrapper(*args, **kwargs):
ctx = contextvars.Context()
return ctx.run(func, *args, **kwargs)
return wrapper
class ContextTest(unittest.TestCase):
def test_context_var_new_1(self):
with self.assertRaisesRegex(TypeError, 'takes exactly 1'):
contextvars.ContextVar()
with self.assertRaisesRegex(TypeError, 'must be a str'):
contextvars.ContextVar(1)
c = contextvars.ContextVar('aaa')
self.assertEqual(c.name, 'aaa')
with self.assertRaises(AttributeError):
c.name = 'bbb'
self.assertNotEqual(hash(c), hash('aaa'))
@isolated_context
def test_context_var_repr_1(self):
c = contextvars.ContextVar('a')
self.assertIn('a', repr(c))
c = contextvars.ContextVar('a', default=123)
self.assertIn('123', repr(c))
lst = []
c = contextvars.ContextVar('a', default=lst)
lst.append(c)
self.assertIn('...', repr(c))
self.assertIn('...', repr(lst))
t = c.set(1)
self.assertIn(repr(c), repr(t))
self.assertNotIn(' used ', repr(t))
c.reset(t)
self.assertIn(' used ', repr(t))
def test_context_subclassing_1(self):
with self.assertRaisesRegex(TypeError, 'not an acceptable base type'):
class MyContextVar(contextvars.ContextVar):
# Potentially we might want ContextVars to be subclassable.
pass
with self.assertRaisesRegex(TypeError, 'not an acceptable base type'):
class MyContext(contextvars.Context):
pass
with self.assertRaisesRegex(TypeError, 'not an acceptable base type'):
class MyToken(contextvars.Token):
pass
def test_context_new_1(self):
with self.assertRaisesRegex(TypeError, 'any arguments'):
contextvars.Context(1)
with self.assertRaisesRegex(TypeError, 'any arguments'):
contextvars.Context(1, a=1)
with self.assertRaisesRegex(TypeError, 'any arguments'):
contextvars.Context(a=1)
contextvars.Context(**{})
def test_context_typerrors_1(self):
ctx = contextvars.Context()
with self.assertRaisesRegex(TypeError, 'ContextVar key was expected'):
ctx[1]
with self.assertRaisesRegex(TypeError, 'ContextVar key was expected'):
1 in ctx
with self.assertRaisesRegex(TypeError, 'ContextVar key was expected'):
ctx.get(1)
def test_context_get_context_1(self):
ctx = contextvars.copy_context()
self.assertIsInstance(ctx, contextvars.Context)
def test_context_run_1(self):
ctx = contextvars.Context()
with self.assertRaisesRegex(TypeError, 'missing 1 required'):
ctx.run()
def test_context_run_2(self):
ctx = contextvars.Context()
def func(*args, **kwargs):
kwargs['spam'] = 'foo'
args += ('bar',)
return args, kwargs
for f in (func, functools.partial(func)):
# partial doesn't support FASTCALL
self.assertEqual(ctx.run(f), (('bar',), {'spam': 'foo'}))
self.assertEqual(ctx.run(f, 1), ((1, 'bar'), {'spam': 'foo'}))
self.assertEqual(
ctx.run(f, a=2),
(('bar',), {'a': 2, 'spam': 'foo'}))
self.assertEqual(
ctx.run(f, 11, a=2),
((11, 'bar'), {'a': 2, 'spam': 'foo'}))
a = {}
self.assertEqual(
ctx.run(f, 11, **a),
((11, 'bar'), {'spam': 'foo'}))
self.assertEqual(a, {})
def test_context_run_3(self):
ctx = contextvars.Context()
def func(*args, **kwargs):
1 / 0
with self.assertRaises(ZeroDivisionError):
ctx.run(func)
with self.assertRaises(ZeroDivisionError):
ctx.run(func, 1, 2)
with self.assertRaises(ZeroDivisionError):
ctx.run(func, 1, 2, a=123)
@isolated_context
def test_context_run_4(self):
ctx1 = contextvars.Context()
ctx2 = contextvars.Context()
var = contextvars.ContextVar('var')
def func2():
self.assertIsNone(var.get(None))
def func1():
self.assertIsNone(var.get(None))
var.set('spam')
ctx2.run(func2)
self.assertEqual(var.get(None), 'spam')
cur = contextvars.copy_context()
self.assertEqual(len(cur), 1)
self.assertEqual(cur[var], 'spam')
return cur
returned_ctx = ctx1.run(func1)
self.assertEqual(ctx1, returned_ctx)
self.assertEqual(returned_ctx[var], 'spam')
self.assertIn(var, returned_ctx)
def test_context_run_5(self):
ctx = contextvars.Context()
var = contextvars.ContextVar('var')
def func():
self.assertIsNone(var.get(None))
var.set('spam')
1 / 0
with self.assertRaises(ZeroDivisionError):
ctx.run(func)
self.assertIsNone(var.get(None))
def test_context_run_6(self):
ctx = contextvars.Context()
c = contextvars.ContextVar('a', default=0)
def fun():
self.assertEqual(c.get(), 0)
self.assertIsNone(ctx.get(c))
c.set(42)
self.assertEqual(c.get(), 42)
self.assertEqual(ctx.get(c), 42)
ctx.run(fun)
def test_context_run_7(self):
ctx = contextvars.Context()
def fun():
with self.assertRaisesRegex(RuntimeError, 'is already entered'):
ctx.run(fun)
ctx.run(fun)
@isolated_context
def test_context_getset_1(self):
c = contextvars.ContextVar('c')
with self.assertRaises(LookupError):
c.get()
self.assertIsNone(c.get(None))
t0 = c.set(42)
self.assertEqual(c.get(), 42)
self.assertEqual(c.get(None), 42)
self.assertIs(t0.old_value, t0.MISSING)
self.assertIs(t0.old_value, contextvars.Token.MISSING)
self.assertIs(t0.var, c)
t = c.set('spam')
self.assertEqual(c.get(), 'spam')
self.assertEqual(c.get(None), 'spam')
self.assertEqual(t.old_value, 42)
c.reset(t)
self.assertEqual(c.get(), 42)
self.assertEqual(c.get(None), 42)
c.set('spam2')
with self.assertRaisesRegex(RuntimeError, 'has already been used'):
c.reset(t)
self.assertEqual(c.get(), 'spam2')
ctx1 = contextvars.copy_context()
self.assertIn(c, ctx1)
c.reset(t0)
with self.assertRaisesRegex(RuntimeError, 'has already been used'):
c.reset(t0)
self.assertIsNone(c.get(None))
self.assertIn(c, ctx1)
self.assertEqual(ctx1[c], 'spam2')
self.assertEqual(ctx1.get(c, 'aa'), 'spam2')
self.assertEqual(len(ctx1), 1)
self.assertEqual(list(ctx1.items()), [(c, 'spam2')])
self.assertEqual(list(ctx1.values()), ['spam2'])
self.assertEqual(list(ctx1.keys()), [c])
self.assertEqual(list(ctx1), [c])
ctx2 = contextvars.copy_context()
self.assertNotIn(c, ctx2)
with self.assertRaises(KeyError):
ctx2[c]
self.assertEqual(ctx2.get(c, 'aa'), 'aa')
self.assertEqual(len(ctx2), 0)
self.assertEqual(list(ctx2), [])
@isolated_context
def test_context_getset_2(self):
v1 = contextvars.ContextVar('v1')
v2 = contextvars.ContextVar('v2')
t1 = v1.set(42)
with self.assertRaisesRegex(ValueError, 'by a different'):
v2.reset(t1)
@isolated_context
def test_context_getset_3(self):
c = contextvars.ContextVar('c', default=42)
ctx = contextvars.Context()
def fun():
self.assertEqual(c.get(), 42)
with self.assertRaises(KeyError):
ctx[c]
self.assertIsNone(ctx.get(c))
self.assertEqual(ctx.get(c, 'spam'), 'spam')
self.assertNotIn(c, ctx)
self.assertEqual(list(ctx.keys()), [])
t = c.set(1)
self.assertEqual(list(ctx.keys()), [c])
self.assertEqual(ctx[c], 1)
c.reset(t)
self.assertEqual(list(ctx.keys()), [])
with self.assertRaises(KeyError):
ctx[c]
ctx.run(fun)
@isolated_context
def test_context_getset_4(self):
c = contextvars.ContextVar('c', default=42)
ctx = contextvars.Context()
tok = ctx.run(c.set, 1)
with self.assertRaisesRegex(ValueError, 'different Context'):
c.reset(tok)
@isolated_context
def test_context_getset_5(self):
c = contextvars.ContextVar('c', default=42)
c.set([])
def fun():
c.set([])
c.get().append(42)
self.assertEqual(c.get(), [42])
contextvars.copy_context().run(fun)
self.assertEqual(c.get(), [])
def test_context_copy_1(self):
ctx1 = contextvars.Context()
c = contextvars.ContextVar('c', default=42)
def ctx1_fun():
c.set(10)
ctx2 = ctx1.copy()
self.assertEqual(ctx2[c], 10)
c.set(20)
self.assertEqual(ctx1[c], 20)
self.assertEqual(ctx2[c], 10)
ctx2.run(ctx2_fun)
self.assertEqual(ctx1[c], 20)
self.assertEqual(ctx2[c], 30)
def ctx2_fun():
self.assertEqual(c.get(), 10)
c.set(30)
self.assertEqual(c.get(), 30)
ctx1.run(ctx1_fun)
@isolated_context
@threading_helper.requires_working_threading()
def test_context_threads_1(self):
cvar = contextvars.ContextVar('cvar')
def sub(num):
for i in range(10):
cvar.set(num + i)
time.sleep(random.uniform(0.001, 0.05))
self.assertEqual(cvar.get(), num + i)
return num
tp = concurrent.futures.ThreadPoolExecutor(max_workers=10)
try:
results = list(tp.map(sub, range(10)))
finally:
tp.shutdown()
self.assertEqual(results, list(range(10)))
# HAMT Tests
class HashKey:
_crasher = None
def __init__(self, hash, name, *, error_on_eq_to=None):
assert hash != -1
self.name = name
self.hash = hash
self.error_on_eq_to = error_on_eq_to
def __repr__(self):
return f'<Key name:{self.name} hash:{self.hash}>'
def __hash__(self):
if self._crasher is not None and self._crasher.error_on_hash:
raise HashingError
return self.hash
def __eq__(self, other):
if not isinstance(other, HashKey):
return NotImplemented
if self._crasher is not None and self._crasher.error_on_eq:
raise EqError
if self.error_on_eq_to is not None and self.error_on_eq_to is other:
raise ValueError(f'cannot compare {self!r} to {other!r}')
if other.error_on_eq_to is not None and other.error_on_eq_to is self:
raise ValueError(f'cannot compare {other!r} to {self!r}')
return (self.name, self.hash) == (other.name, other.hash)
class KeyStr(str):
def __hash__(self):
if HashKey._crasher is not None and HashKey._crasher.error_on_hash:
raise HashingError
return super().__hash__()
def __eq__(self, other):
if HashKey._crasher is not None and HashKey._crasher.error_on_eq:
raise EqError
return super().__eq__(other)
class HaskKeyCrasher:
def __init__(self, *, error_on_hash=False, error_on_eq=False):
self.error_on_hash = error_on_hash
self.error_on_eq = error_on_eq
def __enter__(self):
if HashKey._crasher is not None:
raise RuntimeError('cannot nest crashers')
HashKey._crasher = self
def __exit__(self, *exc):
HashKey._crasher = None
class HashingError(Exception):
pass
class EqError(Exception):
pass
@unittest.skipIf(hamt is None, '_testinternalcapi.hamt() not available')
class HamtTest(unittest.TestCase):
def test_hashkey_helper_1(self):
k1 = HashKey(10, 'aaa')
k2 = HashKey(10, 'bbb')
self.assertNotEqual(k1, k2)
self.assertEqual(hash(k1), hash(k2))
d = dict()
d[k1] = 'a'
d[k2] = 'b'
self.assertEqual(d[k1], 'a')
self.assertEqual(d[k2], 'b')
def test_hamt_basics_1(self):
h = hamt()
h = None # NoQA
def test_hamt_basics_2(self):
h = hamt()
self.assertEqual(len(h), 0)
h2 = h.set('a', 'b')
self.assertIsNot(h, h2)
self.assertEqual(len(h), 0)
self.assertEqual(len(h2), 1)
self.assertIsNone(h.get('a'))
self.assertEqual(h.get('a', 42), 42)
self.assertEqual(h2.get('a'), 'b')
h3 = h2.set('b', 10)
self.assertIsNot(h2, h3)
self.assertEqual(len(h), 0)
self.assertEqual(len(h2), 1)
self.assertEqual(len(h3), 2)
self.assertEqual(h3.get('a'), 'b')
self.assertEqual(h3.get('b'), 10)
self.assertIsNone(h.get('b'))
self.assertIsNone(h2.get('b'))
self.assertIsNone(h.get('a'))
self.assertEqual(h2.get('a'), 'b')
h = h2 = h3 = None
def test_hamt_basics_3(self):
h = hamt()
o = object()
h1 = h.set('1', o)
h2 = h1.set('1', o)
self.assertIs(h1, h2)
def test_hamt_basics_4(self):
h = hamt()
h1 = h.set('key', [])
h2 = h1.set('key', [])
self.assertIsNot(h1, h2)
self.assertEqual(len(h1), 1)
self.assertEqual(len(h2), 1)
self.assertIsNot(h1.get('key'), h2.get('key'))
def test_hamt_collision_1(self):
k1 = HashKey(10, 'aaa')
k2 = HashKey(10, 'bbb')
k3 = HashKey(10, 'ccc')
h = hamt()
h2 = h.set(k1, 'a')
h3 = h2.set(k2, 'b')
self.assertEqual(h.get(k1), None)
self.assertEqual(h.get(k2), None)
self.assertEqual(h2.get(k1), 'a')
self.assertEqual(h2.get(k2), None)
self.assertEqual(h3.get(k1), 'a')
self.assertEqual(h3.get(k2), 'b')
h4 = h3.set(k2, 'cc')
h5 = h4.set(k3, 'aa')
self.assertEqual(h3.get(k1), 'a')
self.assertEqual(h3.get(k2), 'b')
self.assertEqual(h4.get(k1), 'a')
self.assertEqual(h4.get(k2), 'cc')
self.assertEqual(h4.get(k3), None)
self.assertEqual(h5.get(k1), 'a')
self.assertEqual(h5.get(k2), 'cc')
self.assertEqual(h5.get(k2), 'cc')
self.assertEqual(h5.get(k3), 'aa')
self.assertEqual(len(h), 0)
self.assertEqual(len(h2), 1)
self.assertEqual(len(h3), 2)
self.assertEqual(len(h4), 2)
self.assertEqual(len(h5), 3)
def test_hamt_collision_3(self):
# Test that iteration works with the deepest tree possible.
# https://github.com/python/cpython/issues/93065
C = HashKey(0b10000000_00000000_00000000_00000000, 'C')
D = HashKey(0b10000000_00000000_00000000_00000000, 'D')
E = HashKey(0b00000000_00000000_00000000_00000000, 'E')
h = hamt()
h = h.set(C, 'C')
h = h.set(D, 'D')
h = h.set(E, 'E')
# BitmapNode(size=2 count=1 bitmap=0b1):
# NULL:
# BitmapNode(size=2 count=1 bitmap=0b1):
# NULL:
# BitmapNode(size=2 count=1 bitmap=0b1):
# NULL:
# BitmapNode(size=2 count=1 bitmap=0b1):
# NULL:
# BitmapNode(size=2 count=1 bitmap=0b1):
# NULL:
# BitmapNode(size=2 count=1 bitmap=0b1):
# NULL:
# BitmapNode(size=4 count=2 bitmap=0b101):
# <Key name:E hash:0>: 'E'
# NULL:
# CollisionNode(size=4 id=0x107a24520):
# <Key name:C hash:2147483648>: 'C'
# <Key name:D hash:2147483648>: 'D'
self.assertEqual({k.name for k in h.keys()}, {'C', 'D', 'E'})
@support.requires_resource('cpu')
def test_hamt_stress(self):
COLLECTION_SIZE = 7000
TEST_ITERS_EVERY = 647
CRASH_HASH_EVERY = 97
CRASH_EQ_EVERY = 11
RUN_XTIMES = 3
for _ in range(RUN_XTIMES):
h = hamt()
d = dict()
for i in range(COLLECTION_SIZE):
key = KeyStr(i)
if not (i % CRASH_HASH_EVERY):
with HaskKeyCrasher(error_on_hash=True):
with self.assertRaises(HashingError):
h.set(key, i)
h = h.set(key, i)
if not (i % CRASH_EQ_EVERY):
with HaskKeyCrasher(error_on_eq=True):
with self.assertRaises(EqError):
h.get(KeyStr(i)) # really trigger __eq__
d[key] = i
self.assertEqual(len(d), len(h))
if not (i % TEST_ITERS_EVERY):
self.assertEqual(set(h.items()), set(d.items()))
self.assertEqual(len(h.items()), len(d.items()))
self.assertEqual(len(h), COLLECTION_SIZE)
for key in range(COLLECTION_SIZE):
self.assertEqual(h.get(KeyStr(key), 'not found'), key)
keys_to_delete = list(range(COLLECTION_SIZE))
random.shuffle(keys_to_delete)
for iter_i, i in enumerate(keys_to_delete):
key = KeyStr(i)
if not (iter_i % CRASH_HASH_EVERY):
with HaskKeyCrasher(error_on_hash=True):
with self.assertRaises(HashingError):
h.delete(key)
if not (iter_i % CRASH_EQ_EVERY):
with HaskKeyCrasher(error_on_eq=True):
with self.assertRaises(EqError):
h.delete(KeyStr(i))
h = h.delete(key)
self.assertEqual(h.get(key, 'not found'), 'not found')
del d[key]
self.assertEqual(len(d), len(h))
if iter_i == COLLECTION_SIZE // 2:
hm = h
dm = d.copy()
if not (iter_i % TEST_ITERS_EVERY):
self.assertEqual(set(h.keys()), set(d.keys()))
self.assertEqual(len(h.keys()), len(d.keys()))
self.assertEqual(len(d), 0)
self.assertEqual(len(h), 0)
# ============
for key in dm:
self.assertEqual(hm.get(str(key)), dm[key])
self.assertEqual(len(dm), len(hm))
for i, key in enumerate(keys_to_delete):
hm = hm.delete(str(key))
self.assertEqual(hm.get(str(key), 'not found'), 'not found')
dm.pop(str(key), None)
self.assertEqual(len(d), len(h))
if not (i % TEST_ITERS_EVERY):
self.assertEqual(set(h.values()), set(d.values()))
self.assertEqual(len(h.values()), len(d.values()))
self.assertEqual(len(d), 0)
self.assertEqual(len(h), 0)
self.assertEqual(list(h.items()), [])
def test_hamt_delete_1(self):
A = HashKey(100, 'A')
B = HashKey(101, 'B')
C = HashKey(102, 'C')
D = HashKey(103, 'D')
E = HashKey(104, 'E')
Z = HashKey(-100, 'Z')
Er = HashKey(103, 'Er', error_on_eq_to=D)
h = hamt()
h = h.set(A, 'a')
h = h.set(B, 'b')
h = h.set(C, 'c')
h = h.set(D, 'd')
h = h.set(E, 'e')
orig_len = len(h)
# BitmapNode(size=10 bitmap=0b111110000 id=0x10eadc618):
# <Key name:A hash:100>: 'a'
# <Key name:B hash:101>: 'b'
# <Key name:C hash:102>: 'c'
# <Key name:D hash:103>: 'd'
# <Key name:E hash:104>: 'e'
h = h.delete(C)
self.assertEqual(len(h), orig_len - 1)
with self.assertRaisesRegex(ValueError, 'cannot compare'):
h.delete(Er)
h = h.delete(D)
self.assertEqual(len(h), orig_len - 2)
h2 = h.delete(Z)
self.assertIs(h2, h)
h = h.delete(A)
self.assertEqual(len(h), orig_len - 3)
self.assertEqual(h.get(A, 42), 42)
self.assertEqual(h.get(B), 'b')
self.assertEqual(h.get(E), 'e')
def test_hamt_delete_2(self):
A = HashKey(100, 'A')
B = HashKey(201001, 'B')
C = HashKey(101001, 'C')
D = HashKey(103, 'D')
E = HashKey(104, 'E')
Z = HashKey(-100, 'Z')
Er = HashKey(201001, 'Er', error_on_eq_to=B)
h = hamt()
h = h.set(A, 'a')
h = h.set(B, 'b')
h = h.set(C, 'c')
h = h.set(D, 'd')
h = h.set(E, 'e')
orig_len = len(h)
# BitmapNode(size=8 bitmap=0b1110010000):
# <Key name:A hash:100>: 'a'
# <Key name:D hash:103>: 'd'
# <Key name:E hash:104>: 'e'
# NULL:
# BitmapNode(size=4 bitmap=0b100000000001000000000):
# <Key name:B hash:201001>: 'b'
# <Key name:C hash:101001>: 'c'
with self.assertRaisesRegex(ValueError, 'cannot compare'):
h.delete(Er)
h = h.delete(Z)
self.assertEqual(len(h), orig_len)
h = h.delete(C)
self.assertEqual(len(h), orig_len - 1)
h = h.delete(B)
self.assertEqual(len(h), orig_len - 2)
h = h.delete(A)
self.assertEqual(len(h), orig_len - 3)
self.assertEqual(h.get(D), 'd')
self.assertEqual(h.get(E), 'e')
h = h.delete(A)
h = h.delete(B)
h = h.delete(D)
h = h.delete(E)
self.assertEqual(len(h), 0)
def test_hamt_delete_3(self):
A = HashKey(100, 'A')
B = HashKey(101, 'B')
C = HashKey(100100, 'C')
D = HashKey(100100, 'D')
E = HashKey(104, 'E')
h = hamt()
h = h.set(A, 'a')
h = h.set(B, 'b')
h = h.set(C, 'c')
h = h.set(D, 'd')
h = h.set(E, 'e')
orig_len = len(h)
# BitmapNode(size=6 bitmap=0b100110000):
# NULL:
# BitmapNode(size=4 bitmap=0b1000000000000000000001000):
# <Key name:A hash:100>: 'a'
# NULL:
# CollisionNode(size=4 id=0x108572410):
# <Key name:C hash:100100>: 'c'
# <Key name:D hash:100100>: 'd'
# <Key name:B hash:101>: 'b'
# <Key name:E hash:104>: 'e'
h = h.delete(A)
self.assertEqual(len(h), orig_len - 1)
h = h.delete(E)
self.assertEqual(len(h), orig_len - 2)
self.assertEqual(h.get(C), 'c')
self.assertEqual(h.get(B), 'b')
def test_hamt_delete_4(self):
A = HashKey(100, 'A')
B = HashKey(101, 'B')
C = HashKey(100100, 'C')
D = HashKey(100100, 'D')
E = HashKey(100100, 'E')
h = hamt()
h = h.set(A, 'a')
h = h.set(B, 'b')
h = h.set(C, 'c')
h = h.set(D, 'd')
h = h.set(E, 'e')
orig_len = len(h)
# BitmapNode(size=4 bitmap=0b110000):
# NULL:
# BitmapNode(size=4 bitmap=0b1000000000000000000001000):
# <Key name:A hash:100>: 'a'
# NULL:
# CollisionNode(size=6 id=0x10515ef30):
# <Key name:C hash:100100>: 'c'
# <Key name:D hash:100100>: 'd'
# <Key name:E hash:100100>: 'e'
# <Key name:B hash:101>: 'b'
h = h.delete(D)
self.assertEqual(len(h), orig_len - 1)
h = h.delete(E)
self.assertEqual(len(h), orig_len - 2)
h = h.delete(C)
self.assertEqual(len(h), orig_len - 3)
h = h.delete(A)
self.assertEqual(len(h), orig_len - 4)
h = h.delete(B)
self.assertEqual(len(h), 0)
def test_hamt_delete_5(self):
h = hamt()
keys = []
for i in range(17):
key = HashKey(i, str(i))
keys.append(key)
h = h.set(key, f'val-{i}')
collision_key16 = HashKey(16, '18')
h = h.set(collision_key16, 'collision')
# ArrayNode(id=0x10f8b9318):
# 0::
# BitmapNode(size=2 count=1 bitmap=0b1):
# <Key name:0 hash:0>: 'val-0'
#
# ... 14 more BitmapNodes ...
#
# 15::
# BitmapNode(size=2 count=1 bitmap=0b1):
# <Key name:15 hash:15>: 'val-15'
#
# 16::
# BitmapNode(size=2 count=1 bitmap=0b1):
# NULL:
# CollisionNode(size=4 id=0x10f2f5af8):
# <Key name:16 hash:16>: 'val-16'
# <Key name:18 hash:16>: 'collision'
self.assertEqual(len(h), 18)
h = h.delete(keys[2])
self.assertEqual(len(h), 17)
h = h.delete(collision_key16)
self.assertEqual(len(h), 16)
h = h.delete(keys[16])
self.assertEqual(len(h), 15)
h = h.delete(keys[1])
self.assertEqual(len(h), 14)
h = h.delete(keys[1])
self.assertEqual(len(h), 14)
for key in keys:
h = h.delete(key)
self.assertEqual(len(h), 0)
def test_hamt_items_1(self):
A = HashKey(100, 'A')
B = HashKey(201001, 'B')
C = HashKey(101001, 'C')
D = HashKey(103, 'D')
E = HashKey(104, 'E')
F = HashKey(110, 'F')
h = hamt()
h = h.set(A, 'a')
h = h.set(B, 'b')
h = h.set(C, 'c')
h = h.set(D, 'd')
h = h.set(E, 'e')
h = h.set(F, 'f')
it = h.items()
self.assertEqual(
set(list(it)),
{(A, 'a'), (B, 'b'), (C, 'c'), (D, 'd'), (E, 'e'), (F, 'f')})
def test_hamt_items_2(self):
A = HashKey(100, 'A')
B = HashKey(101, 'B')
C = HashKey(100100, 'C')
D = HashKey(100100, 'D')
E = HashKey(100100, 'E')
F = HashKey(110, 'F')
h = hamt()
h = h.set(A, 'a')
h = h.set(B, 'b')
h = h.set(C, 'c')
h = h.set(D, 'd')
h = h.set(E, 'e')
h = h.set(F, 'f')
it = h.items()
self.assertEqual(
set(list(it)),
{(A, 'a'), (B, 'b'), (C, 'c'), (D, 'd'), (E, 'e'), (F, 'f')})
def test_hamt_keys_1(self):
A = HashKey(100, 'A')
B = HashKey(101, 'B')
C = HashKey(100100, 'C')
D = HashKey(100100, 'D')
E = HashKey(100100, 'E')
F = HashKey(110, 'F')
h = hamt()
h = h.set(A, 'a')
h = h.set(B, 'b')
h = h.set(C, 'c')
h = h.set(D, 'd')
h = h.set(E, 'e')
h = h.set(F, 'f')
self.assertEqual(set(list(h.keys())), {A, B, C, D, E, F})
self.assertEqual(set(list(h)), {A, B, C, D, E, F})
def test_hamt_items_3(self):
h = hamt()
self.assertEqual(len(h.items()), 0)
self.assertEqual(list(h.items()), [])
def test_hamt_eq_1(self):
A = HashKey(100, 'A')
B = HashKey(101, 'B')
C = HashKey(100100, 'C')
D = HashKey(100100, 'D')
E = HashKey(120, 'E')
h1 = hamt()
h1 = h1.set(A, 'a')
h1 = h1.set(B, 'b')
h1 = h1.set(C, 'c')
h1 = h1.set(D, 'd')
h2 = hamt()
h2 = h2.set(A, 'a')
self.assertFalse(h1 == h2)
self.assertTrue(h1 != h2)
h2 = h2.set(B, 'b')
self.assertFalse(h1 == h2)
self.assertTrue(h1 != h2)
h2 = h2.set(C, 'c')
self.assertFalse(h1 == h2)
self.assertTrue(h1 != h2)
h2 = h2.set(D, 'd2')
self.assertFalse(h1 == h2)
self.assertTrue(h1 != h2)
h2 = h2.set(D, 'd')
self.assertTrue(h1 == h2)
self.assertFalse(h1 != h2)
h2 = h2.set(E, 'e')
self.assertFalse(h1 == h2)
self.assertTrue(h1 != h2)
h2 = h2.delete(D)
self.assertFalse(h1 == h2)
self.assertTrue(h1 != h2)
h2 = h2.set(E, 'd')
self.assertFalse(h1 == h2)
self.assertTrue(h1 != h2)
def test_hamt_eq_2(self):
A = HashKey(100, 'A')
Er = HashKey(100, 'Er', error_on_eq_to=A)
h1 = hamt()
h1 = h1.set(A, 'a')
h2 = hamt()
h2 = h2.set(Er, 'a')
with self.assertRaisesRegex(ValueError, 'cannot compare'):
h1 == h2
with self.assertRaisesRegex(ValueError, 'cannot compare'):
h1 != h2
def test_hamt_gc_1(self):
A = HashKey(100, 'A')
h = hamt()
h = h.set(0, 0) # empty HAMT node is memoized in hamt.c
ref = weakref.ref(h)
a = []
a.append(a)
a.append(h)
b = []
a.append(b)
b.append(a)
h = h.set(A, b)
del h, a, b
gc.collect()
gc.collect()
gc.collect()
self.assertIsNone(ref())
def test_hamt_gc_2(self):
A = HashKey(100, 'A')
B = HashKey(101, 'B')
h = hamt()
h = h.set(A, 'a')
h = h.set(A, h)
ref = weakref.ref(h)
hi = h.items()
next(hi)
del h, hi
gc.collect()
gc.collect()
gc.collect()
self.assertIsNone(ref())
def test_hamt_in_1(self):
A = HashKey(100, 'A')
AA = HashKey(100, 'A')
B = HashKey(101, 'B')
h = hamt()
h = h.set(A, 1)
self.assertTrue(A in h)
self.assertFalse(B in h)
with self.assertRaises(EqError):
with HaskKeyCrasher(error_on_eq=True):
AA in h
with self.assertRaises(HashingError):
with HaskKeyCrasher(error_on_hash=True):
AA in h
def test_hamt_getitem_1(self):
A = HashKey(100, 'A')
AA = HashKey(100, 'A')
B = HashKey(101, 'B')
h = hamt()
h = h.set(A, 1)
self.assertEqual(h[A], 1)
self.assertEqual(h[AA], 1)
with self.assertRaises(KeyError):
h[B]
with self.assertRaises(EqError):
with HaskKeyCrasher(error_on_eq=True):
h[AA]
with self.assertRaises(HashingError):
with HaskKeyCrasher(error_on_hash=True):
h[AA]
if __name__ == "__main__":
unittest.main()
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