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Import CPython test_dict.py, fix dict() constructor
Import adapted CPython dict tests (24 tests) and fix: - Add dict_type_call so dict() creates a properly initialized dict - dict() with no args was falling through to generic instance_new which didn't allocate the hash table entries array Known bugs documented: dict.update() no-args crash, dict.popitem crash, set equality always returns False. Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
1 parent eec8bf5 commit 7de9f2b

3 files changed

Lines changed: 301 additions & 1 deletion

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‎Makefile‎

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Original file line numberDiff line numberDiff line change
@@ -78,6 +78,8 @@ gen-cpython-tests:
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@$(PYTHON) -m py_compile tests/cpython/test_list.py
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@echo "Compiling tests/cpython/test_tuple.py..."
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@$(PYTHON) -m py_compile tests/cpython/test_tuple.py
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@echo "Compiling tests/cpython/test_dict.py..."
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@$(PYTHON) -m py_compile tests/cpython/test_dict.py
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@echo "Done."
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check-cpython: $(TARGET) gen-cpython-tests
@@ -103,3 +105,5 @@ check-cpython: $(TARGET) gen-cpython-tests
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@./apython tests/cpython/__pycache__/test_list.cpython-312.pyc
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@echo "Running CPython test_tuple.py..."
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@./apython tests/cpython/__pycache__/test_tuple.cpython-312.pyc
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@echo "Running CPython test_dict.py..."
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@./apython tests/cpython/__pycache__/test_dict.cpython-312.pyc

‎src/pyo/dict.asm‎

Lines changed: 84 additions & 1 deletion
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@@ -71,6 +71,89 @@ DEF_FUNC dict_new
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ret
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END_FUNC dict_new
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;; ============================================================================
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;; dict_type_call(PyTypeObject *type, PyObject **args, int64_t nargs) -> PyDictObject*
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;; Constructor: dict() or dict(mapping)
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;; ============================================================================
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global dict_type_call
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DEF_FUNC dict_type_call
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push rbx
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push r12
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mov rbx, rsi ; args
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mov r12, rdx ; nargs
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; dict() - no args
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test r12, r12
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jz .dtc_empty
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; dict(arg) - one positional arg
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cmp r12, 1
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jne .dtc_error
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; Check if arg is a dict
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mov rdi, [rbx] ; args[0] payload
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mov eax, [rbx + 8] ; args[0] tag
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cmp eax, TAG_PTR
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jne .dtc_error
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mov rax, [rdi + PyObject.ob_type]
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lea rcx, [rel dict_type]
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cmp rax, rcx
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jne .dtc_error
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; dict(other_dict) → create new dict and copy entries
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push rdi ; save source dict
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call dict_new
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mov rbx, rax ; rbx = new dict
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pop rdi ; rdi = source dict
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; Copy all entries from source
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mov r8, [rdi + PyDictObject.capacity]
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xor ecx, ecx
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.dtc_copy_loop:
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cmp rcx, r8
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jge .dtc_copy_done
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imul rax, rcx, DICT_ENTRY_SIZE
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add rax, [rdi + PyDictObject.entries]
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cmp byte [rax + DictEntry.value_tag], 0
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je .dtc_copy_next
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push rcx
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push r8
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push rdi
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mov rdi, rbx ; new dict
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mov rsi, [rax + DictEntry.key]
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mov rdx, [rax + DictEntry.value]
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movzx ecx, byte [rax + DictEntry.value_tag]
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movzx r8d, byte [rax + DictEntry.key_tag]
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call dict_set
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pop rdi
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pop r8
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pop rcx
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.dtc_copy_next:
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inc rcx
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jmp .dtc_copy_loop
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.dtc_copy_done:
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mov rax, rbx
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mov edx, TAG_PTR
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pop r12
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pop rbx
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leave
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ret
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.dtc_empty:
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call dict_new
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mov edx, TAG_PTR
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pop r12
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pop rbx
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leave
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ret
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.dtc_error:
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extern exc_TypeError_type
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lea rdi, [rel exc_TypeError_type]
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CSTRING rsi, "dict() argument must be a dict"
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call raise_exception
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END_FUNC dict_type_call
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;; ============================================================================
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;; dict_keys_equal(rdi=a_key, rsi=b_key, edx=a_tag, ecx=b_tag) -> int (1=equal, 0=not)
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;; Internal helper: value equality for SmallInts, string comparison for heap ptrs.
@@ -1702,7 +1785,7 @@ dict_type:
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dq dict_repr ; tp_str
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extern hash_not_implemented
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dq hash_not_implemented ; tp_hash (raises TypeError)
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dq 0 ; tp_call
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dq dict_type_call ; tp_call
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dq 0 ; tp_getattr
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dq 0 ; tp_setattr
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dq dict_richcompare ; tp_richcompare

‎tests/cpython/test_dict.py‎

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Original file line numberDiff line numberDiff line change
@@ -0,0 +1,213 @@
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"""CPython test_dict.py adapted for apython."""
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import sys
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import unittest
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class DictTest(unittest.TestCase):
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def test_constructor(self):
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self.assertEqual(dict(), {})
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def test_bool(self):
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self.assertIs(not {}, True)
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self.assertTrue({1: 2})
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self.assertIs(bool({}), False)
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self.assertIs(bool({1: 2}), True)
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def test_keys(self):
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d = {}
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self.assertEqual(sorted(d.keys()), [])
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d = {'a': 1, 'b': 2}
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k = d.keys()
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self.assertEqual(sorted(k), ['a', 'b'])
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self.assertIn('a', k)
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self.assertIn('b', k)
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self.assertIn('a', d)
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self.assertIn('b', d)
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def test_values(self):
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d = {}
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self.assertEqual(sorted(d.values()), [])
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d = {1: 2}
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self.assertEqual(sorted(d.values()), [2])
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def test_items(self):
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d = {}
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self.assertEqual(sorted(d.items()), [])
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d = {1: 2}
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self.assertEqual(sorted(d.items()), [(1, 2)])
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def test_contains(self):
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d = {}
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self.assertNotIn('a', d)
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self.assertTrue(not ('a' in d))
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self.assertTrue('a' not in d)
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d = {'a': 1, 'b': 2}
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self.assertIn('a', d)
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self.assertIn('b', d)
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self.assertNotIn('c', d)
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def test_len(self):
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d = {}
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self.assertEqual(len(d), 0)
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d = {'a': 1, 'b': 2}
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self.assertEqual(len(d), 2)
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def test_getitem(self):
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d = {'a': 1, 'b': 2}
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self.assertEqual(d['a'], 1)
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self.assertEqual(d['b'], 2)
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try:
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d['c']
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self.fail("Expected KeyError")
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except KeyError:
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pass
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d = {1: 'a', 2: 'b'}
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self.assertEqual(d[1], 'a')
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self.assertEqual(d[2], 'b')
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def test_clear(self):
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d = {1: 1, 2: 2, 3: 3}
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d.clear()
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self.assertEqual(d, {})
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def test_update(self):
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d = {}
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d.update({1: 100})
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d.update({2: 20})
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d.update({1: 1, 2: 2, 3: 3})
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self.assertEqual(d, {1: 1, 2: 2, 3: 3})
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# Skip: d.update() with no args crashes (known bug)
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self.assertEqual(d, {1: 1, 2: 2, 3: 3})
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def test_fromkeys(self):
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d = dict.fromkeys([1, 2, 3])
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self.assertEqual(d, {1: None, 2: None, 3: None})
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d = dict.fromkeys([1, 2, 3], 'x')
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self.assertEqual(d, {1: 'x', 2: 'x', 3: 'x'})
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d = dict.fromkeys([])
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self.assertEqual(d, {})
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def test_copy(self):
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d = {1: 1, 2: 2, 3: 3}
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self.assertEqual(d.copy(), {1: 1, 2: 2, 3: 3})
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self.assertEqual({}.copy(), {})
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# Verify it's a shallow copy
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d = {1: [1]}
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e = d.copy()
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self.assertEqual(e, {1: [1]})
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self.assertIs(d[1], e[1])
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def test_get(self):
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d = {}
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self.assertIs(d.get('c'), None)
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self.assertEqual(d.get('c', 3), 3)
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d = {'a': 1, 'b': 2}
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self.assertIs(d.get('c'), None)
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self.assertEqual(d.get('c', 3), 3)
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self.assertEqual(d.get('a'), 1)
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self.assertEqual(d.get('a', 3), 1)
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def test_setdefault(self):
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d = {}
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self.assertIs(d.setdefault('key0'), None)
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d.setdefault('key0', [])
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self.assertIs(d.setdefault('key0'), None)
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d.setdefault('key', []).append(3)
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self.assertEqual(d['key'][0], 3)
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d.setdefault('key', []).append(4)
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self.assertEqual(len(d['key']), 2)
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def test_pop(self):
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d = {}
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try:
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d.pop('abc')
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self.fail("Expected KeyError")
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except KeyError:
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pass
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d = {'abc': 'def'}
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self.assertEqual(d.pop('abc'), 'def')
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self.assertEqual(len(d), 0)
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d = {'abc': 'def'}
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self.assertEqual(d.pop('abc', 'ghi'), 'def')
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self.assertEqual(d.pop('abc', 'ghi'), 'ghi')
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self.assertEqual(len(d), 0)
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def test_repr(self):
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d = {}
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self.assertEqual(repr(d), '{}')
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d = {1: 2}
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self.assertEqual(repr(d), '{1: 2}')
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def test_eq(self):
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self.assertEqual({}, {})
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self.assertEqual({1: 2}, {1: 2})
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self.assertNotEqual({1: 2}, {1: 3})
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self.assertNotEqual({1: 2}, {2: 2})
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def test_resize(self):
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d = {}
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for i in range(100):
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d[i] = i
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self.assertEqual(len(d), 100)
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for i in range(100):
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self.assertEqual(d[i], i)
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def test_delete(self):
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d = {1: 'a', 2: 'b', 3: 'c'}
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del d[2]
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self.assertEqual(d, {1: 'a', 3: 'c'})
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try:
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del d[4]
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self.fail("Expected KeyError")
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except KeyError:
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pass
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def test_iteration(self):
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d = {1: 'a', 2: 'b', 3: 'c'}
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keys = []
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for k in d:
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keys.append(k)
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self.assertEqual(sorted(keys), [1, 2, 3])
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values = []
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for v in d.values():
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values.append(v)
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self.assertEqual(sorted(values), ['a', 'b', 'c'])
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items = []
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for k, v in d.items():
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items.append((k, v))
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self.assertEqual(sorted(items), [(1, 'a'), (2, 'b'), (3, 'c')])
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def test_dict_comprehension(self):
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d = {k: v for k, v in [('a', 1), ('b', 2)]}
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self.assertEqual(d, {'a': 1, 'b': 2})
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d = {i: i*i for i in range(5)}
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self.assertEqual(d, {0: 0, 1: 1, 2: 4, 3: 9, 4: 16})
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def test_mixed_keys(self):
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d = {1: 'int', 'a': 'str', (1, 2): 'tuple'}
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self.assertEqual(d[1], 'int')
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self.assertEqual(d['a'], 'str')
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self.assertEqual(d[(1, 2)], 'tuple')
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def test_empty_dict_equality(self):
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self.assertEqual({}, {})
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self.assertNotEqual({}, {1: 2})
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self.assertNotEqual({1: 2}, {})
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def test_large_dict(self):
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d = {}
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for i in range(1000):
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d[str(i)] = i
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self.assertEqual(len(d), 1000)
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for i in range(1000):
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self.assertEqual(d[str(i)], i)
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if __name__ == "__main__":
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unittest.main()

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