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Tests for object finalization semantics, as outlined in PEP 442.
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The base class for all the objects under test, equipped with various
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A context manager to use around all finalization tests.
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zNonGCSimpleBase.testc C s dS )z8
Check the object is sane (non-broken).
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PEP 442 finalizer. Record that this was called, check the
object is in a sane state, and invoke a side effect.
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A side effect called on destruction.
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r r r* r r r r r r) X s r) c @ s e Zd Zf ZdS )�NonGCN)r
r r r% r r r r r+ a s r+ c @ s e Zd Zf Zdd� ZdS )�NonGCResurrectorc C s | j j| � dS )zF
Resurrect self by storing self in a class-wide list.
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r r r% r r r r r r, d s r, c @ s e Zd ZdS )�SimpleN)r
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Test finalization without refcycles.
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Test finalization of an object having a single cyclic reference to
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Explicitly break the reference cycle.
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Test finalization of a cyclic chain. These tests are similar in
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}|� �qS r r )r8 rC r r r r^ d s ) ra r) r re r r r6 r; r2 )r rb �Nrc r5 �wrsr r r � check_non_resurrecting_chainZ s
z7CycleChainFinalizationTest.check_non_resurrecting_chainc C s� t |�}tj� �� | j|�}t |�}dd� |D �}dd� |D �}dd� |D �}~tj� | j|� | j|� | jdd� |D �d g| � | j � tj� | j|� | jg � W d Q R X d S )Nc S s g | ] }t |��qS r )r )r8 rB r r r r^ m s zGCycleChainFinalizationTest.check_resurrecting_chain.<locals>.<listcomp>c S s g | ]}t |t�rt|��qS r )�
isinstancer. r )r8 rB r r r r^ n s c S s g | ]}t j|��qS r )r? r@ )r8 rB r r r r^ o s c S s g | ]
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ra r) r re r r r6 r; r2 r= )r rb rf rc r5 Z survivor_idsrg r r r �check_resurrecting_chainh s
z3CycleChainFinalizationTest.check_resurrecting_chainc C s | j tgd � d S )N� )rh rZ )r r r r �test_homogenous{ s z*CycleChainFinalizationTest.test_homogenousc C s | j tgd � d S )Nrk )rj r[ )r r r r �test_homogenous_resurrect~ s z4CycleChainFinalizationTest.test_homogenous_resurrectc C s | j tgd � d S )Nrk )rh r\ )r r r r �test_homogenous_suicidal� s z3CycleChainFinalizationTest.test_homogenous_suicidalc C s | j ttgd � d S )NrJ )rh r\ rZ )r r r r � test_heterogenous_suicidal_one� s z9CycleChainFinalizationTest.test_heterogenous_suicidal_onec C s | j tgd tgd � d S )NrJ )rh r\ rZ )r r r r � test_heterogenous_suicidal_two� s z9CycleChainFinalizationTest.test_heterogenous_suicidal_twoc C s | j ttgd � d S )NrJ )rj r[ rZ )r r r r � test_heterogenous_resurrect_one� s z:CycleChainFinalizationTest.test_heterogenous_resurrect_onec C s | j tttgd � d S )NrJ )rj r[ rZ r\ )r r r r � test_heterogenous_resurrect_two� s z:CycleChainFinalizationTest.test_heterogenous_resurrect_twoc C s( | j tgd tgd tgd � d S )NrJ )rj r[ rZ r\ )r r r r �!test_heterogenous_resurrect_three� s z<CycleChainFinalizationTest.test_heterogenous_resurrect_threeN)r
r r r$ re rh rj rl rm rn ro rp rq rr rs r r r r r] M s r] c @ s e Zd Zdd� Zdd� ZdS )�
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rP } z| jj|� W Y d d }~X nX d S )N)r r r r r r! r )r r" r r r r# � s zLegacyBase.__del__c C s^ y*| j s(| jjt| �� | j� | j� W n. tk
rX } z| jj|� W Y dd}~X nX dS )zJ
Legacy (pre-PEP 442) finalizer, mapped to a tp_del slot.
N)r r r r r r r! r )r r" r r r �
__tp_del__� s zLegacyBase.__tp_del__N)r
r r r# ru r r r r rt � s
rt c @ s e Zd ZdS )�LegacyN)r
r r r r r r rv � s rv c @ s e Zd Zdd� ZdS )�LegacyResurrectorc C s | j j| � dS )zF
Resurrect self by storing self in a class-wide list.
N)r r )r r r r r � s z LegacyResurrector.side_effectN)r
r r r r r r r rw � s rw c @ s e Zd ZdS )�LegacySelfCycleN)r
r r r r r r rx � s rx c s8 e Zd ZdZ� fdd�Zdd� Zdd� Zdd � Z� ZS )
�LegacyFinalizationTestz5
Test finalization of objects with a tp_del.
c s t jj� t j� t� j� d S )N)r r r r rM r3 )r )rN r r r3 � s
z LegacyFinalizationTest.tearDownc
C s� t j� �r t� }t|�g}tj|�}~tj� | j|� | j |� | j
g � | j |� d � tj� | j|� | j |� W d Q R X d S )N) r) r rv r r? r@ r r r6 r7 r; rA )r rB r5 rC r r r � test_legacy� s
z"LegacyFinalizationTest.test_legacyc
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r) r rw r r? r@ r r r6 r7 r; rA r= )r rB r5 rC r r r �test_legacy_resurrect� s
z,LegacyFinalizationTest.test_legacy_resurrectc
C s� t j� �l t� }t|�g}tj|�}~tj� | jg � | j g � | j
g � | j |� | j |� d � d tj
d _W d Q R X | j g � | j|� d � d S )Nr )r) r rx r r? r@ r r r6 r7 r; r< rE r rA )r rB r5 rC r r r �test_legacy_self_cycle� s
z-LegacyFinalizationTest.test_legacy_self_cycle) r
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ry �__main__)%r$ r' r Zunittestr? Z _testcapir � ImportErrorr r r r) r+ r, r- r. r/ ZTestCaser> rL rP rQ rR rS rU rZ r[ r\ r] rt rv rw rx Z cpython_onlyry r
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