func (kvs KVS) MarshalJSON() ([]byte, error) {
	b := new(bytes.Buffer)
	b.Write([]byte("{"))
	for i, kv := range kvs {
		b.Write([]byte("\"" + kv.Key + "\"" + ":"))
		valBuf, err := json.Marshal(kv.Value)
		if err != nil {
			return nil, err
		}
		b.Write(valBuf)
		if i < len(kvs)-1 {
			b.Write([]byte(","))
		}
	}
	b.Write([]byte("}"))
	return b.Bytes(), nil
}

```

</div>

It is **HIGHLY encouraged** that you write or copy the code, edit it and run it locally.

Using it in your editor is what really shows you the benefits of FastAPI, seeing how little code you have to write, all the type checks, autocompletion, etc.

---

## Install FastAPI { #install-fastapi }

The first step is to install FastAPI.

    assert e.value.code == status.WS_1008_POLICY_VIOLATION
    # and no error is leaked
    assert caught == []


def test_depend_err_middleware():
    """
    Verify that it is possible to write custom WebSocket middleware to catch errors
    """

    @websocket_middleware
    async def errorhandler(websocket: WebSocket, call_next):
        try:
            return await call_next()

    assertFalse(sink.wasStreamClosed());

    out.write(new byte[] {1, 2, 3, 4});
    out.close();

    assertTrue(sink.wasStreamClosed());
    assertArrayEquals(new byte[] {1, 2, 3, 4}, sink.getBytes());
  }

  public void testWrite_bytes() throws IOException {
    assertArrayEquals(new byte[0], sink.getBytes());
    sink.write(bytes);

    assertTrue(sink.wasStreamOpened() && sink.wasStreamClosed());

        SMBUtil.writeInt4(0, buffer, 64); // eaSize

        // Write short name length and short name
        byte[] shortNameBytes = Strings.getUNIBytes(shortName);
        buffer[68] = (byte) shortNameBytes.length; // shortNameLength
        System.arraycopy(shortNameBytes, 0, buffer, 70, Math.min(shortNameBytes.length, 24));

        // Write filename
        if (unicode) {

build/
develop-eggs/
dist/
downloads/
eggs/
.eggs/
lib/
lib64/
parts/
sdist/
var/
wheels/
*.egg-info/
.installed.cfg
*.egg
MANIFEST

# PyInstaller
#  Usually these files are written by a python script from a template
#  before PyInstaller builds the exe, so as to inject date/other infos into it.
*.manifest
*.spec

# Installer logs
pip-log.txt
pip-delete-this-directory.txt

            int smallEncodedSize = context.encode(smallBuffer, 0);
            int largeEncodedSize = context.encode(largeBuffer, 500);

            // Assert
            // encode() returns actual bytes written (6), not size() value (8)
            assertEquals(6, smallEncodedSize); // actual: 2 bytes count + 2*2 bytes for ciphers
            assertEquals(6, largeEncodedSize);

            // Verify data at different positions

        List<MojoExecution> executions = getExecutions(plan);

        // [01] clean:clean
        // [02] modello:xpp3-writer
        // [03] modello:java
        // [04] modello:xpp3-reader
        // [05] modello:xpp3-writer
        // [06] modello:java
        // [07] modello:xpp3-reader
        // [08] plugin:descriptor
        // [09] resources:resources

 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with this library; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 */
package jcifs.internal.smb1.com;

/**
 * Container for SMB server negotiation data.

  inner class FaultySink(
    sink: Sink,
    private val file: Path,
  ) : ForwardingSink(sink) {
    override fun write(
      source: Buffer,
      byteCount: Long,
    ) {
      if (writeFaults.contains(file)) {
        throw IOException("boom!")
      } else {
        super.write(source, byteCount)
      }
    }
  }