* **ścieżka**: to `/`.
* **operacja**: to `get`.
* **funkcja**: to funkcja poniżej "dekoratora" (poniżej `@app.get("/")`).

{* ../../docs_src/first_steps/tutorial001.py hl[7] *}

Jest to funkcja Python.

Zostanie ona wywołana przez **FastAPI** za każdym razem, gdy otrzyma żądanie do adresu URL "`/`" przy użyciu operacji `GET`.

W tym przypadku jest to funkcja "asynchroniczna".

---

        provider.adjustActionResponseHeaders("application/xml", (k, v) -> headerMap.put(k, v));
        assertEquals(2, headerMap.size());
        assertEquals("def", headerMap.get("X-Def"));
        assertEquals("def2", headerMap.get("X-Def2"));
    }

    public void test_write_defaultAndSpecificHtml() throws Exception {

    Predicate<Throwable> predicate = INSTANCE_OF.get(expectedThrowable);
    if (predicate == null) {
      throw new IllegalArgumentException(
          expectedThrowable
              + " is not yet supported by ReflectionFreeAssertThrows. Add an entry for it in the"
              + " map in that class.");
    }
    Object result;
    try {
      result = supplier.get();
    } catch (Throwable t) {

    assertThat(connect.headers[":authority"]).isNull()
    val get = server.takeRequest()
    assertThat(get.requestLine).isEqualTo("GET / HTTP/1.1")
    assertThat(get.headers["Host"]).isEqualTo("[::1]:$port")
    assertThat(get.headers[":authority"]).isNull()
    assertThat(get.url).isEqualTo(url)
  }

  @Test
  fun ipv6HostHasSquareBracesHttp2() {

                    if (crawlerList.get(i).getCrawlerContext().getStatus() == CrawlerStatus.DONE
                            && Constants.RUNNING.equals(crawlerStatusList.get(i))) {
                        crawlerList.get(i).awaitTermination();
                        crawlerStatusList.set(i, Constants.DONE);
                        final String sid = crawlerList.get(i).getCrawlerContext().getSessionId();

        for (int i = 0; i < createdComponents.size(); i++) {
            for (int j = i + 1; j < createdComponents.size(); j++) {
                assertNotSame(createdComponents.get(i), createdComponents.get(j));
            }
        }
    }

    /**
     * Test concurrent destroy operations
     */
    public void test_concurrentDestroy() throws Exception {

              }));
    }
    threadPool.shutdown();
    assertTrue(threadPool.awaitTermination(300, SECONDS));
    long sum = 0;
    for (Future<Long> f : futures) {
      sum += f.get();
    }
    assertEquals(sum, map.get(key));
  }

     *
     * @param url the URL to get a client for
     * @return the crawler client instance to use for the URL
     */
    @Override
    protected CrawlerClient getClient(final String url) {
        final CrawlingConfigHelper crawlingConfigHelper = ComponentUtil.getCrawlingConfigHelper();
        final CrawlingConfig crawlingConfig = crawlingConfigHelper.get(crawlerContext.getSessionId());

        assertEquals(5, pythonJob.argList.size());
        assertEquals("single1", pythonJob.argList.get(0));
        assertEquals("multi1", pythonJob.argList.get(1));
        assertEquals("multi2", pythonJob.argList.get(2));
        assertEquals("single2", pythonJob.argList.get(3));
        assertEquals("multi3", pythonJob.argList.get(4));
    }

    // Test getPyFilePath method
    public void test_getPyFilePath() {

            public WebApiManager get(HttpServletRequest req) {
                assertSame(request, req);
                return null;
            }
        };
        ComponentUtil.register(factory, "webApiManagerFactory");

        // Execute
        webApiFilter.doFilter(request, response, chain);

        // Verify chain was called
        assertTrue(chainCalled.get());
    }