}

    /**
     * Returns the number of bytes available to read.
     * @return the number of available bytes
     * @throws IOException if an I/O error occurs
     */
    public int available() throws IOException {
        return this.dis.available();
    }

    /**
     * Reads bytes into the specified array.
     * @param b the byte array to read into
     * @throws IOException if an I/O error occurs
     */

* `write(data)`: Escribe `data` (`str` o `bytes`) en el archivo.
* `read(size)`: Lee `size` (`int`) bytes/caracteres del archivo.
* `seek(offset)`: Va a la posición de bytes `offset` (`int`) en el archivo.
    * Por ejemplo, `await myfile.seek(0)` iría al inicio del archivo.
    * Esto es especialmente útil si ejecutas `await myfile.read()` una vez y luego necesitas leer el contenido nuevamente.
* `close()`: Cierra el archivo.

* `write(data)`：把 `data` （`str` 或 `bytes`）写入文件；
* `read(size)`：按指定数量的字节或字符（`size` (`int`)）读取文件内容；
* `seek(offset)`：移动至文件 `offset` （`int`）字节处的位置；
    * 例如，`await myfile.seek(0) ` 移动到文件开头；
    * 执行 `await myfile.read()` 后，需再次读取已读取内容时，这种方法特别好用；
* `close()`：关闭文件。

因为上述方法都是 `async` 方法，要搭配「await」使用。

例如，在 `async` *路径操作函数* 内，要用以下方式读取文件内容：

```Python
contents = await myfile.read()
```

import java.util.concurrent.Future;
import java.util.concurrent.TimeUnit;
import java.util.concurrent.TimeoutException;

/**
 * A ScheduledExecutorService that executes all scheduled actions immediately in the calling thread.
 *
 * <p>See {@link TestingExecutors#sameThreadScheduledExecutor()} for a full list of constraints.
 *
 * @author John Sirois
 * @author Zach van Schouwen
 */
@GwtIncompatible

import java.util.concurrent.Future;
import java.util.concurrent.TimeUnit;
import java.util.concurrent.TimeoutException;

/**
 * A ScheduledExecutorService that executes all scheduled actions immediately in the calling thread.
 *
 * <p>See {@link TestingExecutors#sameThreadScheduledExecutor()} for a full list of constraints.
 *
 * @author John Sirois
 * @author Zach van Schouwen
 */
@GwtIncompatible

        buffer[7] = 0x00;
        // lastNameOffset (2 bytes)
        buffer[8] = 0x10;
        buffer[9] = 0x00;

        int result = response.readParametersWireFormat(buffer, 0, 10);

        // Should read 10 bytes
        assertEquals(10, result);
        // Check the values were parsed correctly
        assertEquals(1, response.getSid());
        assertEquals(5, response.getNumEntries());

    }

    @Test
    void testReadParameterWordsWireFormat() {
        byte[] buffer = new byte[1024];
        int result = response.readParameterWordsWireFormat(buffer, 0);

        // The method should read parameter words
        assertTrue(result >= 0, "readParameterWordsWireFormat should return non-negative value");
    }

    @Test
    void testWriteBytesWireFormat() {
        byte[] dst = new byte[1024];

    protected static final String SCHEMA_LOCATION_FORMAT = "https://maven.apache.org/xsd/maven-%s.xsd";

    protected Model read(Path src) throws IOException, XMLStreamException {
        try (InputStream is = Files.newInputStream(src)) {
            return new MavenStaxReader().read(is, false, null);
        }
    }

    protected void write(Model model, Path dest) throws IOException, XMLStreamException {

    a.commit()
    assertAbsent("a")
  }

  /**
   * Each read sees a snapshot of the file at the time read was called. This means that two reads of
   * the same key can see different data.
   */
  @Test
  fun readAndWriteOverlapsMaintainConsistency() {
    Assumptions.assumeFalse(windows) // Can't edit while a read is in progress.

    val v1Creator = cache.edit("k1")!!
    v1Creator.setString(0, "AAaa")

            bufferIndex += dataCount;
        }

        /* Check to see if the entire transaction has been
         * read. If so call the read methods.
         */

        if (!parametersDone && parameterDisplacement + parameterCount == totalParameterCount) {
            parametersDone = true;
        }