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a k�h�; � @ s� d Z ddlZddlZddlmZmZ ddlmZ ddlm Z ddl m Z ddl m Z dZd Ze �� r�e d �du r�e d �du r�d Zd ZG dd� de �ZG dd� de �ZdS )z' Tests for L{twisted.python.lockfile}. � N)�skipIf� skipUnless)�lockfile)� requireModule)�platform)�TestCaseF� zwin32api.OpenProcessZ pywintypesTzZOn windows, lockfile.kill is not implemented in the absence of win32api and/or pywintypes.c @ sx e Zd ZdZdd� Zee�� d�dd� �Zdd� Z ee�� d �d d � �Z e e e �d d � �Ze e e �dd� �Zdd� ZdS )� UtilTestszM Tests for the helper functions used to implement L{FilesystemLock}. c C s: | � � }t�d|� | �ttjd|�}| �|jtj� dS )z� L{lockfile.symlink} raises L{OSError} with C{errno} set to L{EEXIST} when an attempt is made to create a symlink which already exists. �fooN)�mktempr �symlink� assertRaises�OSError� assertEqual�errno�EEXIST��self�name�exc� r ��/root/rpmbuild/BUILDROOT/imh-python39-modules-3.9.7-92.el8.x86_64/opt/imh-python/lib/python3.9/site-packages/twisted/test/test_lockfile.py�test_symlinkEEXIST& s z UtilTests.test_symlinkEEXIST�Bspecial rename EIO handling only necessary and correct on Windows.c C sD | � � }dd� }| �td|� | �ttj|d�}| �|jtj� dS )a< L{lockfile.symlink} raises L{OSError} with C{errno} set to L{EIO} when the underlying L{rename} call fails with L{EIO}. Renaming a file on Windows may fail if the target of the rename is in the process of being deleted (directory deletion appears not to be atomic). c S s t tjd ��d S �N�r r �EIO��src�dstr r r � fakeRename? s z4UtilTests.test_symlinkEIOWindows.<locals>.fakeRename�renamer N) r �patchr r �IOErrorr r r r )r r r r r r r �test_symlinkEIOWindows0 s z UtilTests.test_symlinkEIOWindowsc C s, | � � }| �ttj|�}| �|jtj� dS )z� L{lockfile.readlink} raises L{OSError} with C{errno} set to L{ENOENT} when an attempt is made to read a symlink which does not exist. N)r r r r �readlinkr r �ENOENTr r r r �test_readlinkENOENTF s z UtilTests.test_readlinkENOENT�Gspecial readlink EACCES handling only necessary and correct on Windows.c C sB | � � }dd� }| �td|� | �ttj|�}| �|jtj� dS )a\ L{lockfile.readlink} raises L{OSError} with C{errno} set to L{EACCES} on Windows when the underlying file open attempt fails with C{EACCES}. Opening a file on Windows may fail if the path is inside a directory which is in the process of being deleted (directory deletion appears not to be atomic). c S s t tjd ��d S r �r r �EACCES)�path�moder r r �fakeOpen^ s z6UtilTests.test_readlinkEACCESWindows.<locals>.fakeOpen�_openN) r r" r r r# r% r r r* )r r r- r r r r �test_readlinkEACCESWindowsO s z$UtilTests.test_readlinkEACCESWindowsc C s t �t�� d� dS )z} L{lockfile.kill} returns without error if passed the PID of a process which exists and signal C{0}. r N)r �kill�os�getpid�r r r r � test_kille s zUtilTests.test_killc C s& | � ttjdd�}| �|jtj� dS )z� L{lockfile.kill} raises L{OSError} with errno of L{ESRCH} if passed a PID which does not correspond to any process. i���r N)r r r r0 r r �ESRCH)r r r r r �test_killESRCHm s zUtilTests.test_killESRCHc C s6 | � tdd� t�| �� �}|�� | �|�� � dS )z� Verify that when L{lockfile.kill} does end up as None (e.g. on Windows without pywin32), it doesn't end up being called and raising a L{TypeError}. r0 N)r" r �FilesystemLockr �lock� assertFalse)r �flr r r �test_noKillCallw s zUtilTests.test_noKillCallN)�__name__� __module__� __qualname__�__doc__r r r � isWindowsr$ r' r/ r �skipKill�skipKillReasonr4 r6 r; r r r r r ! s$ � � r c @ s� e Zd Zdd� Zdd� Zee�� d�dd� �Zdd � Z d d � Z d d � Z dd� Z dd� Z ee�� d�dd� �Zee�� d�dd� �Zdd� Zdd� Zee�� d�d d � �Zd d � Zd d!� Zd"d#� Zd$d%� Zd&d'� Zd(S ))� LockingTestsc sL � fdd�}| � td|� | �� }t�|�}| �t|j�}| �|j� � d S )Nc s t � d ��d S r )r )�source�dest�r r r � fakeSymlink� s z3LockingTests._symlinkErrorTest.<locals>.fakeSymlinkr ) r" r r r7 r r r8 r r )r r rG �lockfr8 r r rF r �_symlinkErrorTest� s z LockingTests._symlinkErrorTestc C s | � tj� dS )z� An exception raised by C{symlink} other than C{EEXIST} is passed up to the caller of L{FilesystemLock.lock}. N)rI r �ENOSYSr3 r r r �test_symlinkError� s z LockingTests.test_symlinkErrorz9POSIX-specific error propagation not expected on Windows.c C s | � tj� | � tj� dS )a An L{OSError} raised by C{symlink} on a POSIX platform with an errno of C{EACCES} or C{EIO} is passed to the caller of L{FilesystemLock.lock}. On POSIX, unlike on Windows, these are unexpected errors which cannot be handled by L{FilesystemLock}. N)rI r r* r r3 r r r �test_symlinkErrorPOSIX� s z#LockingTests.test_symlinkErrorPOSIXc C s< | � � }t�|�}| �|�� � | �|j� | �|j� dS )z� If the lock has never been held, it can be acquired and the C{clean} and C{locked} attributes are set to C{True}. N)r r r7 � assertTruer8 �clean�locked�r rH r8 r r r �test_cleanlyAcquire� s z LockingTests.test_cleanlyAcquirec C sh | � � }t�|�}| �|�� � |�� | �|j� t�|�}| �|�� � | �|j� | �|j� dS )z� If a lock is released cleanly, it can be re-acquired and the C{clean} and C{locked} attributes are set to C{True}. N) r r r7 rM r8 �unlockr9 rO rN rP r r r �test_cleanlyRelease� s z LockingTests.test_cleanlyReleasec C sH | � � }t�|�}| �|�� � t�|�}| �|�� � | �|j� dS )zK If a lock is currently locked, it cannot be locked again. N)r r r7 rM r8 r9 rO )r rH Z firstLockZ secondLockr r r �test_cannotLockLocked� s z"LockingTests.test_cannotLockLockedc s� d� � fdd�}| � � }| �td|� t�t� �|� t�|�}| �|�� � | �|j � | �|j � | � t� |�tt �� �� dS )z� If a lock was held by a process which no longer exists, it can be acquired, the C{clean} attribute is set to C{False}, and the C{locked} attribute is set to C{True}. i90 c s, |dkrt tjd ��| � kr(t tjd ��d S )Nr �r r �EPERMr5 ��pid�signal��ownerr r �fakeKill� s z4LockingTests.test_uncleanlyAcquire.<locals>.fakeKillr0 N)r r" r r �strr7 rM r8 r9 rN rO r r% r1 r2 )r r\ rH r8 r rZ r �test_uncleanlyAcquire� s z"LockingTests.test_uncleanlyAcquirec s~ � �fdd�}| � td|��dd� }| � td|� | �� � t�� �}t�td�� � | �|�� � | �|j� | �|j � dS ) z� If the lock is initially held but then released before it can be examined to determine if the process which held it still exists, it is acquired and the C{clean} and C{locked} attributes are set to C{True}. c s t �� � ��� t �| �S r )r �rmlink�restorer% �r �rH Z readlinkPatchr r � fakeReadlink� s z?LockingTests.test_lockReleasedBeforeCheck.<locals>.fakeReadlinkr% c S s, |dkrt tjd ��| dkr(t tjd ��d S �Nr �u� rU rW r r r r\ � s z;LockingTests.test_lockReleasedBeforeCheck.<locals>.fakeKillr0 re N� r" r r r7 r r] rM r8 rN rO )r rc r\ r8 r rb r � test_lockReleasedBeforeCheck� s z)LockingTests.test_lockReleasedBeforeCheckr c C sF dd� }| � td|� | �� }t�|�}| �|�� � | �|j� dS )a� If the lock is released while an attempt is made to acquire it, the lock attempt fails and C{FilesystemLock.lock} returns C{False}. This can happen on Windows when L{lockfile.symlink} fails with L{IOError} of C{EIO} because another process is in the middle of a call to L{os.rmdir} (implemented in terms of RemoveDirectory) which is not atomic. c S s t tjd ��d S r r r r r r rG s zGLockingTests.test_lockReleasedDuringAcquireSymlink.<locals>.fakeSymlinkr N)r" r r r7 r9 r8 rO )r rG rH r8 r r r �%test_lockReleasedDuringAcquireSymlink s z2LockingTests.test_lockReleasedDuringAcquireSymlinkr( c C sV dd� }| � td|� | �� }t�|�}t�td�|� | �|�� � | �|j� dS )z� If the lock is initially held but is released while an attempt is made to acquire it, the lock attempt fails and L{FilesystemLock.lock} returns C{False}. c S s t tjd ��d S r r) ra r r r rc ) s zILockingTests.test_lockReleasedDuringAcquireReadlink.<locals>.fakeReadlinkr% re N) r" r r r7 r r] r9 r8 rO )r rc rH r8 r r r �&test_lockReleasedDuringAcquireReadlink s z3LockingTests.test_lockReleasedDuringAcquireReadlinkc sj � �fdd�}| � td|� | �� }t�td�|� t�|�}| ��|j�}| �|j � � | � |j � d S )Nc s �� d ��d S r r ra �r � exceptionTyper r rc 8 s z5LockingTests._readlinkErrorTest.<locals>.fakeReadlinkr% re ) r" r r r r] r7 r r8 r r r9 rO )r rk r rc rH r8 r r rj r �_readlinkErrorTest7 s z LockingTests._readlinkErrorTestc C s | � ttj� | � ttj� dS )z� An exception raised by C{readlink} other than C{ENOENT} is passed up to the caller of L{FilesystemLock.lock}. N)rl r r rJ r# r3 r r r �test_readlinkErrorG s z LockingTests.test_readlinkErrorc C s | � ttj� | � ttj� dS )z� Any L{IOError} raised by C{readlink} on a POSIX platform passed to the caller of L{FilesystemLock.lock}. On POSIX, unlike on Windows, these are unexpected errors which cannot be handled by L{FilesystemLock}. N)rl r# r rJ r* r3 r r r �test_readlinkErrorPOSIXO s z$LockingTests.test_readlinkErrorPOSIXc s~ � �fdd�}| � td|��dd� }| � td|� | �� � t�� �}t�td�� � | �|�� � | �|j� | �|j � dS ) z� If a second process cleans up the lock after a first one checks the lock and finds that no process is holding it, the first process does not fail when it tries to clean up the lock. c s �� � t�� � t�| �S r )r` r r_ ra �rH Z rmlinkPatchr r � fakeRmlinke s z?LockingTests.test_lockCleanedUpConcurrently.<locals>.fakeRmlinkr_ c S s, |dkrt tjd ��| dkr(t tjd ��d S rd rU rW r r r r\ n s z=LockingTests.test_lockCleanedUpConcurrently.<locals>.fakeKillr0 re Nrf )r rp r\ r8 r ro r � test_lockCleanedUpConcurrently^ s z+LockingTests.test_lockCleanedUpConcurrentlyc C s| dd� }| � td|� dd� }| � td|� | �� }t�td�|� t�|�}| �t|j�}| � |j t j � | � |j � dS ) z� An exception raised by L{rmlink} other than C{ENOENT} is passed up to the caller of L{FilesystemLock.lock}. c S s t tjd ��d S r )r r rJ ra r r r rp � s z1LockingTests.test_rmlinkError.<locals>.fakeRmlinkr_ c S s, |dkrt tjd ��| dkr(t tjd ��d S rd rU rW r r r r\ � s z/LockingTests.test_rmlinkError.<locals>.fakeKillr0 re N)r" r r r r] r7 r r r8 r r rJ r9 rO )r rp r\ rH r8 r r r r �test_rmlinkError} s z LockingTests.test_rmlinkErrorc C sf dd� }| � td|� | �� }t�td�|� t�|�}| �t|j�}| � |j t j � | � |j � dS )z� If L{kill} raises an exception other than L{OSError} with errno set to C{ESRCH}, the exception is passed up to the caller of L{FilesystemLock.lock}. c S s t tjd ��d S r )r r rV rW r r r r\ � s z-LockingTests.test_killError.<locals>.fakeKillr0 re N)r" r r r r] r7 r r r8 r r rV r9 rO )r r\ rH r8 r r r r �test_killError� s zLockingTests.test_killErrorc C s< | � � }t�tt�� d �|� t�|�}| �t|j � dS )z� L{FilesystemLock.unlock} raises L{ValueError} if called for a lock which is held by a different process. � N) r r r r] r1 r2 r7 r � ValueErrorrR rP r r r �test_unlockOther� s z LockingTests.test_unlockOtherc C s\ | � � }| �t�|�� t�|�}| �|�� � | �t�|�� |�� | �t�|�� dS )zp L{isLocked} returns C{True} if the named lock is currently locked, C{False} otherwise. N)r r9 r ZisLockedr7 rM r8 rR rP r r r � test_isLocked� s zLockingTests.test_isLockedN)r< r= r> rI rK r r r@ rL rQ rS rT r^ rg r rh ri rl rm rn rq rr rs rv rw r r r r rC � sD � � � � rC )r? r r1 Zunittestr r Ztwisted.pythonr Ztwisted.python.reflectr Ztwisted.python.runtimer Ztwisted.trial.unittestr rA rB r@ r rC r r r r �<module> s& � ��b
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