@BeforeEach
    void setUp() throws Exception {
        /*
         *       v2
         *   v1<
         *      v3-v4
         *
         */
        graph = new MetadataGraph(4, 3);
        v1 = graph.addVertex(new ArtifactMetadata("g", "a1", "1.0"));
        graph.setEntry(v1);
        v2 = graph.addVertex(new ArtifactMetadata("g", "a2", "1.0"));

   *
   * This can be invoked more than 1 time for a single [Call]. For example, if the response to the
   * [Call.request] is a redirect to a different address.
   *
   * Prior to OkHttp 4.3 this was incorrectly invoked when the client was ready to read headers.
   * This was misleading for tracing because it was too early.
   */
  open fun responseHeadersStart(call: Call) {
  }

  /**

        .addEqualityGroup(function, Functions.forMap(map, 42))
        .addEqualityGroup(Functions.forMap(map))
        .addEqualityGroup(Functions.forMap(map, null))
        .addEqualityGroup(Functions.forMap(map, 43))
        .testEquals();
  }

  @J2ktIncompatible
  @GwtIncompatible // SerializableTester
  public void testForMapWithDefault_includeSerializable() {
    Map<String, Integer> map = new HashMap<>();

    graph.addNode(1);
    graph.addNode(4);
  }

  private static void addEdges(MutableNetwork<Integer, String> network) {
    network.addEdge(3, 1, "i");
    network.addEdge(1, 4, "e");
    network.addEdge(4, 3, "p");
  }

  private static class NonComparableSuperClass {
    final Integer value;

    NonComparableSuperClass(Integer value) {
      this.value = checkNotNull(value);
    }

    @Override

물론, 이는 최적의 방법이 아니며 프로덕션 환경에서는 사용하지 않을 것입니다.

프로덕션 환경에서는 위에서 설명한 옵션 중 하나를 사용하는 것이 좋습니다.

그러나 이는 WebSockets의 서버 측에 집중하고 동작하는 예제를 제공하는 가장 간단한 방법입니다:

{* ../../docs_src/websockets/tutorial001.py hl[2,6:38,41:43] *}

## `websocket` 생성하기

**FastAPI** 응용 프로그램에서 `websocket`을 생성합니다:

{* ../../docs_src/websockets/tutorial001.py hl[1,46:47] *}

/// note | 기술적 세부사항

        .addEqualityGroup(function, Functions.forMap(map, 42))
        .addEqualityGroup(Functions.forMap(map))
        .addEqualityGroup(Functions.forMap(map, null))
        .addEqualityGroup(Functions.forMap(map, 43))
        .testEquals();
  }

  @J2ktIncompatible
  @GwtIncompatible // SerializableTester
  public void testForMapWithDefault_includeSerializable() {
    Map<String, Integer> map = new HashMap<>();

        key8[2] = (byte) (key[1] << 6 | (key[2] & 0xFF) >>> 2);
        key8[3] = (byte) (key[2] << 5 | (key[3] & 0xFF) >>> 3);
        key8[4] = (byte) (key[3] << 4 | (key[4] & 0xFF) >>> 4);
        key8[5] = (byte) (key[4] << 3 | (key[5] & 0xFF) >>> 5);
        key8[6] = (byte) (key[5] << 2 | (key[6] & 0xFF) >>> 6);
        key8[7] = (byte) (key[6] << 1);
        for (int i = 0; i < key8.length; i++) {

    }
    for (int i = 0; i < 37; i++) {
      counter2.recordLoadException(i);
      totalLoadTime += i;
    }
    for (int i = 0; i < 41; i++) {
      counter2.recordMisses(1);
    }
    for (int i = 0; i < 43; i++) {
      counter2.recordEviction();
    }

    counter1.incrementBy(counter2);
    assertThat(counter1.snapshot()).isEqualTo(new CacheStats(38, 60, 44, 54, totalLoadTime, 66));
  }

Na produção, você teria uma das opções acima.

Mas é a maneira mais simples de focar no lado do servidor de WebSockets e ter um exemplo funcional:

{* ../../docs_src/websockets/tutorial001_py39.py hl[2,6:38,41:43] *}

## Crie um `websocket` { #create-a-websocket }

Em sua aplicação **FastAPI**, crie um `websocket`:

{* ../../docs_src/websockets/tutorial001_py39.py hl[1,46:47] *}

/// note | Detalhes Técnicos

    assertFalse(range.isEmpty());
    assertEquals("(4..8)", range.toString());
    reserializeAndAssert(range);
  }

  public void testOpen_invalid() {
    assertThrows(IllegalArgumentException.class, () -> Range.open(4, 3));
    assertThrows(IllegalArgumentException.class, () -> Range.open(3, 3));
  }

  public void testClosed() {
    Range<Integer> range = Range.closed(5, 7);
    checkContains(range);