B
    \#                 @   s0  d dl Z d dlZd dlZd dlZd dlZd dlZddlmZ ddlmZ ddlm	Z	 ddlm
Z
 ddlmZ e	rdd	 Ze ZZn$erd
d Ze ZZnejZdd Zdd Zdd ZG dd deZdd Zdd Zdd Zdd Zdd Zdd Zed d! Zd"d# ZG d$d% d%eZd*d&d'Zd(d) Z dS )+    N   )	decorator)defaultdict)jython)py2k)pypyc              G   s&   t   td t   t   dS )z aggressive gc.collect for tests.g?r   )gccollecttimeZsleep)args r   6lib/python3.7/site-packages/sqlalchemy/testing/util.pyjython_gc_collect   s
    
r   c              G   s   t   t   d S )N)r   r	   )r   r   r   r   pypy_gc_collect$   s    r   c               C   s   d S )Nr   r   r   r   r   lazy_gc-   s    r   c              #   s~   t  } tr6ydd l}| | W n tk
r4   Y nX dd l}| | x0| D ]( x"dD ] j fddfV  qXW qNW d S )Nr   )r      r   c                s     | S )N)dumps)d)pickle_protocolr   r   <lambda>B   s    zpicklers.<locals>.<lambda>)setr   cPickleaddImportErrorpickleloads)picklersr   r   r   )r   r   r   r   1   s    


r   c             C   s<   t | trt| |S | tdd|   tjtd| S )N10
   )
isinstancefloatrounddecimalZDecimalZto_integralZROUND_FLOORpow)valueZprecr   r   r   round_decimalE   s
    

r(   c               @   s<   e Zd Zdd Zdd Zdd Zdd Zd	d
 Zdd ZdS )	RandomSetc             C   s    t t| }t| t|S )N)listr   __iter__randomZshuffleiter)selflr   r   r   r+   P   s    
zRandomSet.__iter__c             C   s4   t dt| d }tt| | }| | |S )Nr   r   )r,   Zrandintlenr*   r   r+   remove)r.   indexitemr   r   r   popU   s    
zRandomSet.popc             C   s   t t| |S )N)r)   r   union)r.   otherr   r   r   r5   [   s    zRandomSet.unionc             C   s   t t| |S )N)r)   r   
difference)r.   r6   r   r   r   r7   ^   s    zRandomSet.differencec             C   s   t t| |S )N)r)   r   intersection)r.   r6   r   r   r   r8   a   s    zRandomSet.intersectionc             C   s   t | S )N)r)   )r.   r   r   r   copyd   s    zRandomSet.copyN)	__name__
__module____qualname__r+   r4   r5   r7   r8   r9   r   r   r   r   r)   O   s   r)   c             C   sl   t t}x| D ]\}}|| | qW x>t|D ].\}}x$||d D ]}||| krHdS qHW q2W dS dS )zATrue if the given sorting conforms to the given partial ordering.NFT)r   r   r   	enumerate)tuplesZsorted_elementsZdepsparentchildiZnodenr   r   r   conforms_partial_orderingh   s    rC   c                sB   t tx| D ]\}}| | qW  fdd t |S )Nc             3   sf   t | dkrt| V  nJxH| D ]@}t| |g}|| sx |D ]}|g| V  qJW qW d S )Nr   )r0   r*   r   r7   r8   )elementselemZsubsetZsub_ordering)_all_orderingsedgesr   r   rF   {   s    
z-all_partial_orderings.<locals>._all_orderings)r   r   r   r-   )r>   rD   r?   r@   r   )rF   rG   r   all_partial_orderingsv   s
    rH   c          
   C   s>   y
|| _ W n. tk
r8   t| j| j|| j| j} Y nX | S )ac  Return a function with a given __name__.

    Will assign to __name__ and return the original function if possible on
    the Python implementation, otherwise a new function will be constructed.

    This function should be phased out as much as possible
    in favor of @decorator.   Tests that "generate" many named tests
    should be modernized.

    )r:   	TypeErrortypesFunctionType__code____globals____defaults____closure__)fnnamer   r   r   function_named   s    
rR   c             O   sZ   |   }y"||f||}| ddd |S    t }| j| }|sL n|S Y nX dS )a  Run the given function under the given contextmanager,
    simulating the behavior of 'with' to support older
    Python versions.

    This is not necessary anymore as we have placed 2.6
    as minimum Python version, however some tests are still using
    this structure.

    N)	__enter____exit__sysexc_info)ZctxrP   argkwobjresultrV   Zraise_r   r   r   run_as_contextmanager   s    
r[   c             C   s   dd | D S )zConverts the results of sql execution into a plain set of column tuples.

    Useful for asserting the results of an unordered query.
    c             S   s   h | ]}t |qS r   )tuple).0rowr   r   r   	<setcomp>   s    zrowset.<locals>.<setcomp>r   )Zresultsr   r   r   rowset   s    r`   c             C   s   dst | d S )NF)AssertionError)msgr   r   r   fail   s    rc   c       	   
   O   sp   ddl m} ddl m} ddlm} ||j}|d }t|dd}||_z
| ||S |	||j ||_X dS )z>Provide bound MetaData for a single test, dropping afterwards.r   )config)enginesr   )schemametadataN)
 rd   re   
sqlalchemyrf   MetaDatadbgetattrrg   drop_all_tables)	rP   r   rX   rd   re   rf   rg   r.   Z	prev_metar   r   r   provide_metadata   s    
rn   c                 s0   ddl m  ddlm t fdd}|S )ziForce the given table names to be dropped after test complete,
    isolating for foreign key cycles

    r   )rd   r   )inspectc                s(   z
| ||S t  j jd X d S )N)include_names)rm   rk   )rP   r   rX   )rd   ro   namesr   r   go   s    
zforce_drop_names.<locals>.go)rh   rd   ri   ro   r   )rq   rr   r   )rd   ro   rq   r   force_drop_names   s    rs   c               @   s$   e Zd ZdZdd Zdd ZeZdS )adictz,Dict keys available as attributes.  Shadows.c             C   s*   y| | S  t k
r$   t| |S X d S )N)KeyErrordict__getattribute__)r.   keyr   r   r   rw      s    zadict.__getattribute__c                s   t  fdd|D S )Nc                s   g | ]} | qS r   r   )r]   rx   )r.   r   r   
<listcomp>   s    z"adict.__call__.<locals>.<listcomp>)r\   )r.   keysr   )r.   r   __call__   s    zadict.__call__N)r:   r;   r<   __doc__rw   r{   Zget_allr   r   r   r   rt      s   rt   c             C   s  ddl m}m}m}m}m} ddlm}	m}
 |d k	r<t	|}| 
 }xt|j|dD ]\}}|r|d k	rv||krvqX||	||| |d qX|rX| jjsqXxf|D ]^\}}|d k	r||krq||| |d||d||d}||
||jjg|jjg|d qW qXW W d Q R X d S )Nr   )ColumnTableIntegerrj   ForeignKeyConstraint)	DropTableDropConstraint)rf   xy)rQ   )ri   r}   r~   r   rj   r   Zsqlalchemy.schemar   r   r   ZconnectreversedZget_sorted_table_and_fkc_namesZexecuteZdialectZsupports_altercr   r   )ZengineZ	inspectorrf   rp   r}   r~   r   rj   r   r   r   ZconnZtnameZfkcsZfkctbr   r   r   rm      s8    
rm   c                s   t  fdd}|S )Nc                s   z
| ||S     X d S )N)Z_clear)rP   rW   rX   )	event_clsr   r   decorate'  s    
z!teardown_events.<locals>.decorate)r   )r   r   r   )r   r   teardown_events&  s    r   )NN)!r%   r   r,   rU   r
   rJ   utilr   r   r   r   r   r   Z
gc_collectr   r   r	   r   r(   r   r)   rC   rH   rR   r[   r`   rc   rn   rs   rv   rt   rm   r   r   r   r   r   <module>   s@   	


	
.