* @param callable the callable to execute
     * @return the result
     * @throws Exception if execution fails or circuit is open
     */
    public <T> T call(Callable<T> callable) throws Exception {
        return call(callable, null);
    }

    /**
     * Execute a callable through the circuit breaker with fallback
     *
     * @param <T> return type

    @Override
    public void remove() {
      checkForConcurrentModification();
      checkState(current != null, "no calls to next() since the last call to remove()");
      if (current != next) { // after call to next()
        previous = current.previous;
        nextIndex--;
      } else { // after call to previous()
        next = current.next;
      }
      removeNode(current);
      current = null;

    val request2 = Request.Builder().url(server.url("/")).build()
    val response2 = client.newCall(request2).execute()
    assertThat(response2.body.string()).isEqualTo("def")

    // The HTTP calls should share a single connection.
    assertThat(socksProxy.connectionCount()).isEqualTo(1)
  }

  @Test
  fun proxySelector() {
    server.enqueue(MockResponse.Builder().body("abc").build())

        int timeout3 = delegatingConfig.getResponseTimeout();

        // Then
        assertEquals(30000, timeout1, "First call should return correct value");
        assertEquals(30000, timeout2, "Second call should return correct value");
        assertEquals(30000, timeout3, "Third call should return correct value");
        verify(mockDelegate, times(3)).getResponseTimeout();
    }

    @Test

        assertNotNull(option1);
        assertNotNull(option2);

        // Each call should return a new instance
        assertNotSame(option1, option2);
    }

    public void test_provideMappingOption_consistency() {
        // Test that multiple calls provide consistent configuration
        JsonMappingOption option1 = provider.provideMappingOption();

    // unless it's actually going to be used; validate() is called for all set method calls, so it
    // needs to be fast.
    // (We could instead generate the message once, when the set is created, but zero is better.)
    if (!validator.get()) {
      throw new IllegalStateException(errorMessage.get());
    }
  }

  public void testRegistrationWithBridgeMethod() {
    AtomicInteger calls = new AtomicInteger();
    bus.register(
        new Callback<String>() {
          @Subscribe
          @Override
          public void call(String s) {
            calls.incrementAndGet();
          }
        });

    bus.post("hello");

    assertEquals(1, calls.get());
  }

  public void testPrimitiveSubscribeFails() {

   *
   * <p>This method should be overridden when bulk retrieval is significantly more efficient than
   * many individual lookups. Note that {@link LoadingCache#getAll} will defer to individual calls
   * to {@link LoadingCache#get} if this method is not overridden.
   *
   * @param keys the unique, non-null keys whose values should be loaded

import java.util.List;
import java.util.concurrent.atomic.AtomicInteger;
import org.jspecify.annotations.NullMarked;
import org.jspecify.annotations.Nullable;

/**
 * Tester to ensure forwarding wrapper works by delegating calls to the corresponding method with
 * the same parameters forwarded and return value forwarded back or exception propagated as is.
 *
 * <p>For example:
 *
 * {@snippet :

{* ../../docs_src/app_testing/tutorial001.py hl[2,12,15:18] *}

/// tip

Notice that the testing functions are normal `def`, not `async def`.

And the calls to the client are also normal calls, not using `await`.

This allows you to use `pytest` directly without complications.

///

/// note | Technical Details

You could also use `from starlette.testclient import TestClient`.