)
    assertInvalid(
      "text/plain; a=\"@",
      "Parameter is not formatted correctly: \"a=\"@\" for: \"text/plain; a=\"@\"",
    )
    assertInvalid(
      "text/plain; a=1; b",
      "Parameter is not formatted correctly: \"b\" for: \"text/plain; a=1; b\"",
    )
    assertInvalid(
      "text/plain; a=1; b=",

    assertThat(network.outEdges(N1)).containsExactly(E12);
    // Edge direction handled correctly
    assertThat(network.outEdges(N2)).isEmpty();
  }

  @Test
  public void predecessors_oneEdge() {
    addEdge(N1, N2, E12);
    assertThat(network.predecessors(N2)).containsExactly(N1);
    // Edge direction handled correctly
    assertThat(network.predecessors(N1)).isEmpty();
  }

  @Test

    assertThat(network.outEdges(N1)).containsExactly(E12);
    // Edge direction handled correctly
    assertThat(network.outEdges(N2)).isEmpty();
  }

  @Test
  public void predecessors_oneEdge() {
    addEdge(N1, N2, E12);
    assertThat(network.predecessors(N2)).containsExactly(N1);
    // Edge direction handled correctly
    assertThat(network.predecessors(N1)).isEmpty();
  }

  @Test

## Pin your `fastapi` version

The first thing you should do is to "pin" the version of **FastAPI** you are using to the specific latest version that you know works correctly for your application.

For example, let's say you are using version `0.112.0` in your app.

You will see the automatic API docs for the sub-application, including only its own _path operations_, all under the correct sub-path prefix `/subapi`:

<img src="/img/tutorial/sub-applications/image02.png">

If you try interacting with any of the two user interfaces, they will work correctly, because the browser will be able to talk to each specific app or sub-app.

### Technical Details: `root_path`

    } finally {
      executor.shutdownNow();
    }

    assertTrue(future.isDone());
    assertFalse(future.isCancelled());
  }

  /** Tests that the {@link Future#get(long, TimeUnit)} method times out correctly. */
  public void testTimeoutOnGetWorksCorrectly() throws InterruptedException, ExecutionException {

    // The task thread waits for the latch, so we expect a timeout here.
    try {
      future.get(20, MILLISECONDS);

  }

  /*
   * This is somewhat of a weak test; we verify that all of the methods are
   * correct, but not that they're actually forwarding correctly. We also rely
   * on the other tests (e.g., SynchronizedSetTest) to verify that the
   * collection views are synchronized correctly.
   */

  public void testSize() {
    int unused = create().size();
  }

  public void testIsEmpty() {

    *,
    item_id: int,
    item: Item = Body(
        openapi_examples={
            "normal": {
                "summary": "A normal example",
                "description": "A **normal** item works correctly.",
                "value": {
                    "name": "Foo",
                    "description": "A very nice Item",
                    "price": 35.4,
                    "tax": 3.2,
                },

/**
 * Abstract base class for tests that EventBus finds the correct subscribers.
 *
 * <p>The actual tests are distributed among the other classes in this package based on whether they
 * are annotated or abstract in the superclass.
 *
 * <p>This test must be outside the c.g.c.eventbus package to test correctly.
 *
 * @author Louis Wasserman
 */
abstract class AbstractEventBusTest<H> extends TestCase {

    item: Annotated[
        Item,
        Body(
            openapi_examples={
                "normal": {
                    "summary": "A normal example",
                    "description": "A **normal** item works correctly.",
                    "value": {
                        "name": "Foo",
                        "description": "A very nice Item",
                        "price": 35.4,
                        "tax": 3.2,