/**
     * Validates the preauth integrity for completed negotiation.
     *
     * @param sessionId the session identifier
     * @param expectedHash the expected final hash
     * @return true if validation passes
     * @throws CIFSException if validation fails
     */
    public boolean validatePreauthIntegrity(String sessionId, byte[] expectedHash) throws CIFSException {

class WebSocketExtensionsTest {
  @Test
  fun emptyHeader() {
    assertThat(parse("")).isEqualTo(WebSocketExtensions())
  }

  @Test
  fun noExtensionHeader() {
    assertThat(WebSocketExtensions.parse(headersOf()))
      .isEqualTo(WebSocketExtensions())
  }

  @Test
  fun emptyExtension() {
    assertThat(parse(", permessage-deflate"))

        parameters = "";
        parameterMap = ParameterUtil.parse(parameters);
        assertEquals(0, parameterMap.size());

        parameters = "domain";
        parameterMap = ParameterUtil.parse(parameters);
        assertEquals(1, parameterMap.size());
        assertEquals("", parameterMap.get("domain"));

        parameters = "domain=";
        parameterMap = ParameterUtil.parse(parameters);
        assertEquals(1, parameterMap.size());

		if actualErr != nil && testCase.expectedError == nil {
			t.Errorf("Test %d: %s: Expected to pass, but failed with: error %s.", i, instanceType, actualErr.Error())
			continue
		}
		if actualErr == nil && testCase.expectedError != nil {
			t.Errorf("Test %d: %s: Expected to fail with error \"%s\", but passed instead.", i, instanceType, testCase.expectedError.Error())
			continue
		}

        .addEqualityGroup(parse(""), parse(""))
        .addEqualityGroup(parse("concurrencyLevel=7"), parse("concurrencyLevel=7"))
        .addEqualityGroup(parse("concurrencyLevel=15"), parse("concurrencyLevel=15"))
        .addEqualityGroup(parse("initialCapacity=7"), parse("initialCapacity=7"))
        .addEqualityGroup(parse("initialCapacity=15"), parse("initialCapacity=15"))
        .addEqualityGroup(parse("maximumSize=7"), parse("maximumSize=7"))

  @Test fun invalidCharacters() {
    assertThat(parse(url, "a\u0000b=cd")).isNull()
    assertThat(parse(url, "ab=c\u0000d")).isNull()
    assertThat(parse(url, "a\u0001b=cd")).isNull()
    assertThat(parse(url, "ab=c\u0001d")).isNull()
    assertThat(parse(url, "a\u0009b=cd")).isNull()
    assertThat(parse(url, "ab=c\u0009d")).isNull()
    assertThat(parse(url, "a\u001fb=cd")).isNull()
    assertThat(parse(url, "ab=c\u001fd")).isNull()

        PrunedTag[] tags = PrunedTag.parse("");
        assertEquals(0, tags.length);

        // Test null
        tags = PrunedTag.parse(null);
        assertEquals(0, tags.length);

        // Test whitespace only
        tags = PrunedTag.parse("   ");
        assertEquals(0, tags.length);

        // Test commas only
        tags = PrunedTag.parse(",,,");
        assertEquals(0, tags.length);

            MediaType.parse("text/plain; charset=UTF-8"),
            MediaType.parse("text/plain ; charset=utf-8"),
            MediaType.parse("text/plain; charset =UTF-8"),
            MediaType.parse("text/plain; charset= UTF-8"),
            MediaType.parse("text/plain; charset  =  UTF-8"),
            MediaType.parse("text/plain; charset=\tUTF-8"))

        .addEqualityGroup(parse(""), parse(""))
        .addEqualityGroup(parse("concurrencyLevel=7"), parse("concurrencyLevel=7"))
        .addEqualityGroup(parse("concurrencyLevel=15"), parse("concurrencyLevel=15"))
        .addEqualityGroup(parse("initialCapacity=7"), parse("initialCapacity=7"))
        .addEqualityGroup(parse("initialCapacity=15"), parse("initialCapacity=15"))
        .addEqualityGroup(parse("maximumSize=7"), parse("maximumSize=7"))

You can declare path "parameters" or "variables" with the same syntax used by Python format strings:

{* ../../docs_src/path_params/tutorial001.py hl[6:7] *}

The value of the path parameter `item_id` will be passed to your function as the argument `item_id`.

So, if you run this example and go to <a href="http://127.0.0.1:8000/items/foo" class="external-link" target="_blank">http://127.0.0.1:8000/items/foo</a>, you will see a response of: