## Gerenciadores de contexto { #context-managers }

### O que são "Gerenciadores de Contexto" { #what-are-context-managers }

"Gerenciadores de Contexto" são qualquer um dos objetos Python que podem ser utilizados com a declaração `with`.

* o `APIRouter`
* o `requirements.txt`
* o Bearer Token
* a alteração com quebra de compatibilidade
* o bug
* o botão
* o chamável
* o código
* o commit
* o gerenciador de contexto
* a corrotina
* a sessão do banco de dados
* o disco
* o domínio
* o mecanismo
* o X falso
* o método HTTP GET
* o item
* a biblioteca
* o lifespan
* o bloqueio
* o middleware

        DirectoryLeaseContext context = new DirectoryLeaseContext(key, leaseState, scope);

        assertEquals(key, context.getLeaseKey());
        assertEquals(leaseState, context.getLeaseState());
        assertEquals(scope, context.getCacheScope());
        assertEquals(30000L, context.getMaxCacheAge());
        assertTrue(context.isNotificationEnabled());
        assertEquals(0, context.getNotificationFilter());
    }

        @Test
        @DisplayName("Should handle null context in array")
        void testNullContextInArray() {
            CreateContextRequest[] contexts = new CreateContextRequest[4];
            contexts[0] = new MockCreateContextRequest("FIRST");
            contexts[1] = null; // Null context
            contexts[2] = new MockCreateContextRequest("THIRD");
            contexts[3] = new MockCreateContextRequest("FOURTH");

            contexts[2] = new TestCreateContextResponse("CONTEXT3".getBytes(StandardCharsets.UTF_8));

            // Decode each context
            for (int i = 0; i < contexts.length; i++) {
                contexts[i].decode(buffer, i * 100, 50);
            }

            // Verify each context
            for (int i = 0; i < contexts.length; i++) {
                assertNotNull(contexts[i].getName());

                testEncryptionKey, testDecryptionKey);

        // When/Then - Multiple closes should be safe
        assertDoesNotThrow(() -> {
            context.close();
            context.close();
            context.close();
        });

        assertTrue(context.isClosed());
    }

        // Then
        NegotiateContextRequest[] contexts = request.getNegotiateContexts();
        assertNotNull(contexts);
        assertEquals(2, contexts.length);

        // Verify preauth context
        assertTrue(contexts[0] instanceof PreauthIntegrityNegotiateContext);
        assertEquals(PreauthIntegrityNegotiateContext.NEGO_CTX_PREAUTH_TYPE, contexts[0].getContextType());

        // Verify encryption context

    }

    /**
     * Set the create contexts for this request
     * @param contexts the create contexts to set
     */
    public void setCreateContexts(CreateContextRequest[] contexts) {
        this.createContexts = contexts;
    }

    /**
     * Add a create context to this request
     * @param context the create context to add
     */

    @Test
    @DisplayName("Should return negotiate contexts")
    void testGetNegotiateContexts() throws Exception {
        // Given
        NegotiateContextResponse[] contexts = new NegotiateContextResponse[2];
        contexts[0] = new EncryptionNegotiateContext();
        contexts[1] = new PreauthIntegrityNegotiateContext();
        setPrivateField(response, "negotiateContexts", contexts);

        // When

            throw new CIFSException("Preauth integrity context is invalid for session: " + sessionId);
        }

        try {
            byte[] newHash = calculateHash(context.getCurrentHash(), messageData, context.getHashAlgorithm());
            context.updateHash(newHash);

            log.debug("Updated preauth hash for session {} with {} bytes of data", sessionId, messageData.length);