## `PATH` Environment Variable { #path-environment-variable }

There is a **special** environment variable called **`PATH`** that is used by the operating systems (Linux, macOS, Windows) to find programs to run.

    CLOSED,

    /**
     * {@link ClosingFuture#finishToValueAndCloser(ValueAndCloserConsumer, Executor)} has been
     * called. The step may not be further subsumed, nor may {@link #finishToFuture()} be called.
     */
    WILL_CREATE_VALUE_AND_CLOSER,
  }

        Array<X509Certificate>::class.java,
        String::class.java,
        String::class.java,
      )
    } catch (_: NoSuchMethodException) {
      null
    }

  /** Android method to clean and sort certificates, called via reflection. */
  @Suppress("unused", "UNCHECKED_CAST")
  fun checkServerTrusted(
    chain: Array<out X509Certificate>,
    authType: String,
    host: String,

    hasher.putBytes(bytes, off, len);
    out.write(bytes, off, len);
  }

  /**
   * Returns the {@link HashCode} based on the data written to this stream. The result is
   * unspecified if this method is called more than once on the same instance.
   */
  public HashCode hash() {
    return hasher.hash();
  }

  // Overriding close() because FilterOutputStream's close() method pre-JDK8 has bad behavior:

            assertEquals(4, buffer.size()); // 2 bytes for level + 2 bytes for null terminator
        }

        @Test
        @DisplayName("Should create buffer with null path")
        void testConstructorWithNullPath() {
            String path = null;
            int maxReferralLevel = 2;

            // The implementation doesn't check for null in constructor
            buffer = new DfsReferralRequestBuffer(path, maxReferralLevel);

    }

    @Test
    @DisplayName("Test with null buffer in read methods")
    void testReadMethodsWithNullBuffer() {
        trans2SetFileInfo = new Trans2SetFileInformation(config, TEST_FID, mockFileInfo);

        // All read methods should handle null buffer gracefully
        assertEquals(0, trans2SetFileInfo.readSetupWireFormat(null, 0, 0));

    /** The transaction name for named pipe transactions */
    protected String name = "";
    /** Maximum buffer size set in SmbTransport.sendTransaction() before nextElement called */
    protected int maxBufferSize; // set in SmbTransport.sendTransaction() before nextElement called

    private byte[] txn_buf;

    /**
     * Constructs a transaction request.
     *
     * @param config the configuration to use

        // Test with null values
        result = jobExecutor.execute(null, "script");
        assertEquals("Executed: null script", result);

        result = jobExecutor.execute("type", null);
        assertEquals("Executed: type null", result);

        result = jobExecutor.execute(null, null);
        assertEquals("Executed: null null", result);

        // Test with empty strings

          executor.execute(
              () -> {
                try {
                  startUp();
                  notifyStarted();
                  // If stopAsync() is called while starting we may be in the STOPPING state in
                  // which case we should skip right down to shutdown.
                  if (isRunning()) {
                    try {

        if (bufferManager != null) {
            bufferManager.cleanup();
        }
        if (mocks != null) {
            mocks.close();
        }
    }

    @Test
    public void testGetSendRegion() throws Exception {
        RdmaMemoryRegion region = bufferManager.getSendRegion(1024);
        assertNotNull(region, "Send region should not be null");