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import sys
from unittestmock import UnitTestMock
from cykhash.compat import PYPY, assert_if_not_on_PYPY
import pytest
not_on_pypy = pytest.mark.skipif(PYPY, reason="pypy has no refcounting")
from cykhash import PyObjectMap
class TestPyObjectMapMisc(UnitTestMock):
def test_from_keys_works(self):
s=PyObjectMap.fromkeys(["a", "b", "c"], "kkk")
self.assertEqual(len(s), 3)
self.assertEqual(s["a"],"kkk")
@not_on_pypy
class TestRefCounterPyObjectMap(UnitTestMock):
def test_map_put_discard_right_refcnts(self):
a=4200
s=PyObjectMap()
old_ref_cnt = sys.getrefcount(a)
s[a] = a
self.assertEqual(sys.getrefcount(a), old_ref_cnt+2, msg="first add")
s[a] = a # shouldn't do anything
self.assertEqual(sys.getrefcount(a), old_ref_cnt+2, msg="second add")
s.discard(a)
self.assertEqual(sys.getrefcount(a), old_ref_cnt, msg="discard")
def test_map_deallocate_decrefs(self):
a=4200
s=PyObjectMap()
old_ref_cnt = sys.getrefcount(a)
s[a] = a
self.assertEqual(sys.getrefcount(a), old_ref_cnt+2)
del s
self.assertEqual(sys.getrefcount(a), old_ref_cnt)
def test_map_interator_right_refcnts(self):
a=4200
s=PyObjectMap()
old_ref_cnt = sys.getrefcount(a)
s[a] = a
self.assertEqual(sys.getrefcount(a), old_ref_cnt+2)
lst = list(s.items())
# now also lst helds two additional references
self.assertEqual(sys.getrefcount(a), old_ref_cnt+4)
def test_first_object_kept(self):
a,b =float("nan"), float("nan")
self.assertTrue(a is not b) #prerequisite
s=PyObjectMap()
s[a] = a
s[b] = b
lst = list(s.items())
self.assertEqual(len(lst), 1)
self.assertTrue(a is lst[0][0])
def test_discard_with_equivalent_object(self):
a,b =float("nan"), float("nan")
self.assertTrue(a is not b) #prerequisite
old_ref_cnt_a = sys.getrefcount(a)
old_ref_cnt_b = sys.getrefcount(b)
s=PyObjectMap()
s[a] = None
s[b] = None
self.assertEqual(sys.getrefcount(a), old_ref_cnt_a+1)
self.assertEqual(sys.getrefcount(b), old_ref_cnt_b)
self.assertTrue(b in s)
self.assertTrue(a in s)
self.assertEqual(sys.getrefcount(a), old_ref_cnt_a+1)
self.assertEqual(sys.getrefcount(b), old_ref_cnt_b)
s.discard(b)
self.assertEqual(sys.getrefcount(a), old_ref_cnt_a)
self.assertEqual(sys.getrefcount(b), old_ref_cnt_b)
s.discard(b)
self.assertEqual(sys.getrefcount(a), old_ref_cnt_a)
self.assertEqual(sys.getrefcount(b), old_ref_cnt_b)
s.discard(a)
self.assertEqual(sys.getrefcount(a), old_ref_cnt_a)
self.assertEqual(sys.getrefcount(b), old_ref_cnt_b)
s[b] = None
self.assertEqual(sys.getrefcount(a), old_ref_cnt_a)
self.assertEqual(sys.getrefcount(b), old_ref_cnt_b+1)
def test_rewrite_works(self):
a,b =float("nan"), float("nan")
self.assertTrue(a is not b) #prerequisite
old_ref_cnt_a = sys.getrefcount(a)
old_ref_cnt_b = sys.getrefcount(b)
s=PyObjectMap()
s[a] = a
self.assertEqual(sys.getrefcount(a), old_ref_cnt_a+2)
self.assertEqual(sys.getrefcount(b), old_ref_cnt_b)
s[b] = b
self.assertEqual(sys.getrefcount(a), old_ref_cnt_a+1)
self.assertEqual(sys.getrefcount(b), old_ref_cnt_b+1)
del s
self.assertEqual(sys.getrefcount(a), old_ref_cnt_a)
self.assertEqual(sys.getrefcount(b), old_ref_cnt_b)
def test_rewrite_works(self):
a,b =float("nan"), float("nan")
self.assertTrue(a is not b) #prerequisite
old_ref_cnt_a = sys.getrefcount(a)
old_ref_cnt_b = sys.getrefcount(b)
s=PyObjectMap()
s[a] = a
self.assertEqual(sys.getrefcount(a), old_ref_cnt_a+2)
self.assertEqual(sys.getrefcount(b), old_ref_cnt_b)
s[b] = b
self.assertEqual(sys.getrefcount(a), old_ref_cnt_a+1)
self.assertEqual(sys.getrefcount(b), old_ref_cnt_b+1)
del s
self.assertEqual(sys.getrefcount(a), old_ref_cnt_a)
self.assertEqual(sys.getrefcount(b), old_ref_cnt_b)
def test_nan_float():
nan1 = float("nan")
nan2 = float("nan")
assert_if_not_on_PYPY(nan1 is not nan2, reason="nan is singelton in PyPy")
table = PyObjectMap()
table[nan1] = 42
assert table[nan2] == 42
def test_nan_complex():
nan1 = complex(0, float("nan"))
nan2 = complex(0, float("nan"))
assert_if_not_on_PYPY(nan1 is not nan2, reason="nan is singelton in PyPy")
table = PyObjectMap()
table[nan1] = 42
assert table[nan2] == 42
def test_nan_in_tuple():
nan1 = (float("nan"),)
nan2 = (float("nan"),)
assert_if_not_on_PYPY(nan1[0] is not nan2[0], reason="nan is singelton in PyPy")
table = PyObjectMap()
table[nan1] = 42
assert table[nan2] == 42
def test_nan_in_nested_tuple():
nan1 = (1, (2, (float("nan"),)))
nan2 = (1, (2, (float("nan"),)))
other = (1, 2)
table = PyObjectMap()
table[nan1] = 42
assert table[nan2] == 42
assert other not in table
def test_unique_for_nan_objects_floats():
table = PyObjectMap(zip([float("nan") for i in range(50)], range(50)))
assert len(table) == 1
def test_unique_for_nan_objects_complex():
table = PyObjectMap(zip([complex(float("nan"), 1.0) for i in range(50)], range(50)))
assert len(table) == 1
def test_unique_for_nan_objects_tuple():
table = PyObjectMap(zip([(1.0, (float("nan"), 1.0)) for i in range(50)], range(50)))
assert len(table) == 1
def test_float_complex_int_are_equal_as_objects():
table = PyObjectMap(zip(range(129), range(129)))
assert table[5] == 5
assert table[5.0] == 5
assert table[5.0+0j] == 5
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