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o �b�+ � @ s� U d Z ddlZddlZddlZddlmZ ee ed< zddlZW n e y, dZ Y n w ddl m Z dZ ddl mZ G dd � d �ZG d d � d �ZG d d � d e�ZG dd� de�ZdS )z; Tests for POSIX-based L{IReactorProcess} implementations. � N)�Optional� platformSkipznon-POSIX platform)�process)�TestCasec @ s0 e Zd ZdZdd� Zdd� Zdd� Zdd � Zd S ) �FakeFilez> A dummy file object which records when it is closed. c C s || _ || _d S �N)�testcase�fd)�selfr r � r �I/usr/lib/python3/dist-packages/twisted/internet/test/test_posixprocess.py�__init__ s zFakeFile.__init__c C s | j j�| j� d S r )r �_files�remover �r r r r �close$ s zFakeFile.closec C s | S r r r r r r � __enter__' s zFakeFile.__enter__c C s | � � d S r )r )r �exc_type� exc_value� tracebackr r r �__exit__* s zFakeFile.__exit__N)�__name__� __module__� __qualname__�__doc__r r r r r r r r r s r c @ s$ e Zd ZdZdZdd� Zdd� ZdS )�FakeResourceModulez� Fake version of L{resource} which hard-codes a particular rlimit for maximum open files. @ivar _limit: The value to return for the hard limit of number of open files. � c C s || _ d S r )�_limit�r �limitr r r r 8 s zFakeResourceModule.__init__c C s || j kr d| jgS ddgS )zX A fake of L{resource.getrlimit} which returns a pre-determined result. r �{ i� )� RLIMIT_NOFILEr )r �nor r r � getrlimit; s z FakeResourceModule.getrlimitN)r r r r r! r r# r r r r r . s r c @ s� e Zd ZdZeZdZdZdZdd� Z dd� Z dd� Z d d � Z d d � Z d d� Zdd� Zdd� Zdd� Zdd� Zdd� Zdd� Zdd � Zd d � Zd S ) �FDDetectorTestsa� Tests for _FDDetector class in twisted.internet.process, which detects which function to drop in place for the _listOpenFDs method. @ivar devfs: A flag indicating whether the filesystem fake will indicate that /dev/fd exists. @ivar accurateDevFDResults: A flag indicating whether the /dev/fd fake returns accurate open file information. @ivar procfs: A flag indicating whether the filesystem fake will indicate that /proc/<pid>/fd exists. Fc C s dS )z> Fake os.getpid, always return the same thing r r r r r r �getpidZ s zFDDetectorTests.getpidc C sN t t| j�}| jr|d| �� f kr|S | jr$|dkr$| jr |S g d�S t� �)z� Fake os.listdir, depending on what mode we're in to simulate behaviour. @param arg: the directory to list z /proc/%d/fdz/dev/fd)�0�1�2)�map�strr �procfsr% �devfs�accurateDevFDResults�OSError)r �arg�accurater r r �listdir` s zFDDetectorTests.listdirc C s2 t | tttd��t| j� ��}| j�|j� |S )aO This is a mock for L{open}. It keeps track of opened files so extra descriptors can be returned from the mock for L{os.listdir} when used on one of the list-of-filedescriptors directories. A L{FakeFile} is returned which can be closed to remove the new descriptor from the open list. � )r �min�set�ranger �appendr )r �fname�mode�fr r r �openfileo s zFDDetectorTests.openfilec C s dt jd< dS )zp Make the L{resource} module unimportable for the remainder of the current test method. N�resource)�sys�modulesr r r r �hideResourceModule} s z"FDDetectorTests.hideResourceModulec C s t |�tjd< dS )a Make a L{FakeResourceModule} instance importable at the L{resource} name. @param limit: The value which will be returned for the hard limit of number of open files by the fake resource module's C{getrlimit} function. r; N)r r< r= r r r r �revealResourceModule� s z$FDDetectorTests.revealResourceModulec C s: |du rzt jd= W dS ty Y dS w |t jd< dS )zI Restore the original resource module to L{sys.modules}. Nr; )r< r= �KeyError)r �valuer r r �replaceResourceModule� s �z%FDDetectorTests.replaceResourceModulec C sL t �� | _| j| j_| j| j_| j| j_g d�| _| �| jt j � d�� dS )z� Set up the tests, giving ourselves a detector object to play with and setting up its testable knobs to refer to our mocked versions. �r r � r; N) r � _FDDetector�detectorr1 r% r: r � addCleanuprB r< r= �getr r r r �setUp� s zFDDetectorTests.setUpc s@ dd� }dd� }� fdd�}|||g� j _� �|� j �� � dS )z� L{FDDetector._getImplementation} returns the first method from its C{_implementations} list which returns results which reflect a newly opened file descriptor. c S s t d��)NzThis does not work)� ValueErrorr r r r �failWithException� � zBFDDetectorTests.test_selectFirstWorking.<locals>.failWithExceptionc S � g d�S �NrC r r r r r �failWithWrongResults� rL zEFDDetectorTests.test_selectFirstWorking.<locals>.failWithWrongResultsc s � j d d � S r )r r r r r �correct� s z8FDDetectorTests.test_selectFirstWorking.<locals>.correctN�rF �_implementations�assertIs�_getImplementation)r rK rO rP r r r �test_selectFirstWorking� s �z'FDDetectorTests.test_selectFirstWorkingc C s2 dd� }dd� }||g| j _| �|| j �� � dS )z� L{FDDetector._getImplementation} returns the last method from its C{_implementations} list if none of the implementations manage to return results which reflect a newly opened file descriptor. c S rM )N)� � � r r r r r rO � rL z=FDDetectorTests.test_selectLast.<locals>.failWithWrongResultsc S rM rN r r r r r �failWithOtherWrongResults� rL zBFDDetectorTests.test_selectLast.<locals>.failWithOtherWrongResultsNrQ )r rO rY r r r �test_selectLast� s �z FDDetectorTests.test_selectLastc C sL t �� }|jj}|�� |jj}|�� |jj}| �||� | �||� dS )z� Check that the identity of _listOpenFDs changes after running _listOpenFDs the first time, but not after the second time it's run. In other words, check that the monkey patching actually works. N)r rE � _listOpenFDsr �assertNotEqual� assertEqual)r rF �first�second�thirdr r r �!test_identityOfListOpenFDsChanges� s z1FDDetectorTests.test_identityOfListOpenFDsChangesc C s< d| _ | �t| jj� d| _ d| _| �g d�| j�� � dS )z� L{_FDDetector._devFDImplementation} raises L{OSError} if there is no I{/dev/fd} directory, otherwise it returns the basenames of its children interpreted as integers. FTrC N)r, � assertRaisesr. rF �_devFDImplementationr- r] r r r r �test_devFDImplementation� s z(FDDetectorTests.test_devFDImplementationc C s6 d| _ | �t| jj� d| _ | �g d�| j�� � dS )z� L{_FDDetector._procFDImplementation} raises L{OSError} if there is no I{/proc/<pid>/fd} directory, otherwise it returns the basenames of its children interpreted as integers. FTrC N)r+ rb r. rF �_procFDImplementationr] r r r r �test_procFDImplementation� s z)FDDetectorTests.test_procFDImplementationc C sT | � d� | �ttd��t| j�� �� | � d� | �ttd��t| j�� �� dS )z� L{_FDDetector._fallbackFDImplementation} uses the L{resource} module if it is available, returning a range of integers from 0 to the minimum of C{1024} and the hard I{NOFILE} limit. i i r2 N)r? r] �listr5 rF �_fallbackFDImplementationr r r r � test_resourceFDImplementation� s � �z-FDDetectorTests.test_resourceFDImplementationc C s* | � � | �ttd��t| j�� �� dS )z� L{_FDDetector._fallbackFDImplementation}, the implementation of last resort, succeeds with a fixed range of integers from 0 to 1024 when the L{resource} module is not importable. r2 N)r> r] rg r5 rF rh r r r r � test_fallbackFDImplementation s �z-FDDetectorTests.test_fallbackFDImplementationN)r r r r r �skipr, r- r+ r% r1 r: r> r? rB rI rU rZ ra rd rf ri rj r r r r r$ D s( r$ c @ s$ e Zd ZdZeZdd� Zdd� ZdS )�FileDescriptorTestsz< Tests for L{twisted.internet.process._listOpenFDs} c C sd t �� D ]+}z t�|tj� W q ty/ } z| �tj|jd||jf � W Y d}~qd}~ww dS )z� File descriptors returned by L{_listOpenFDs} are mostly open. This test assumes that zero-legth writes fail with EBADF on closed file descriptors. z2fcntl(%d, F_GETFL) failed with unexpected errno %dN)r r[ �fcntl�F_GETFLr. r] �errno�EBADF)r r �errr r r � test_openFDs" s �����z FileDescriptorTests.test_openFDsc C s� t tj�}t�� }| �|�� |� t�|�� �}| �||�� kd� z|� � | �|t�� � W t� |� nt� |� w | � |t�� � dS )zB L{_listOpenFDs} lists expected file descriptors. z>Expected duplicate file descriptor to be greater than originalN) �open�os�devnullr r[ �assertIn�fileno�dup� assertTruer � assertNotIn)r r9 �openfdsr r r r �test_expectedFDs4 s �z$FileDescriptorTests.test_expectedFDsN)r r r r r rk rr r| r r r r rl s rl )r ro rt r< �typingr r* �__annotations__rm � ImportErrorr �twisted.internetr �twisted.trial.unittestr r r r$ rl r r r r �<module> s& � X
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