* newFuture is a future that completes after this and all prior tasks are done.
     * oldFuture is the previous task's newFuture.
     * outputFuture is the future we return to the caller, a nonCancellationPropagating taskFuture.
     *
     * newFuture is guaranteed to only complete once all tasks previously submitted to this instance
     * have completed - namely after oldFuture is done, and taskFuture has either completed or been

            assertFalse(resource.isClosed());
        }

        assertTrue(resource.isClosed());
    }

    @Test
    @DisplayName("Test managed resource prevents use after close")
    void testManagedResourceUseAfterClose() throws Exception {
        TestResource resource = new TestResource("test4");
        ResourceManager.ManagedResource<TestResource> managed = resourceManager.manage(resource);

            35:ac:60:46:ad:8d:de:18:dc:0b:f6:98:14:ee:89:e8
        Signature Algorithm: ED25519
        Issuer: CN = consoleAdmin
        Validity
            Not Before: Jul 19 15:08:44 2021 GMT
            Not After : Aug 18 15:08:44 2021 GMT
        Subject: CN = consoleAdmin
        Subject Public Key Info:
            Public Key Algorithm: ED25519
                ED25519 Public-Key:
                pub:

// Copyright 2021 The Go Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.

// Test to make sure that if we use R15 after it is clobbered by
// a global variable access while dynamic linking, we get an error.
// See issue 43661.

TEXT ·a1(SB), 0, $0-0
	CMPL runtime·writeBarrier(SB), $0
	MOVL $0, R15
	RET
TEXT ·a2(SB), 0, $0-0
	CMPL runtime·writeBarrier(SB), $0

func SplitN(s, sep []byte, n int) [][]byte { return genSplit(s, sep, 0, n) }

// SplitAfterN slices s into subslices after each instance of sep and
// returns a slice of those subslices.
// If sep is empty, SplitAfterN splits after each UTF-8 sequence.
// The count determines the number of subslices to return:
//   - n > 0: at most n subslices; the last subslice will be the unsplit remainder;

     */
    public OptionalEntity<RelatedContent> getRelatedContent(final String id) {
        return relatedContentBhv.selectByPK(id);
    }

    /**
     * Stores (inserts or updates) a related content entity.
     * After storing, updates the related content helper to refresh the cache.
     *
     * @param relatedContent the RelatedContent entity to store
     */
    public void store(final RelatedContent relatedContent) {

import java.util.concurrent.ExecutorService
import java.util.concurrent.Executors
import java.util.concurrent.TimeUnit
import kotlin.coroutines.cancellation.CancellationException
import okio.Buffer
import org.junit.After
import org.junit.Assert.assertEquals
import org.junit.Assert.assertTrue
import org.junit.Test
import org.junit.runner.RunWith

/**
 * Android HttpEngine.
 */
@RunWith(AndroidJUnit4::class)

            this.supplier = supplier;
        }

        /**
         * Executes the provided {@link Consumer} with a {@link Stream} obtained from the supplier.
         * The stream is automatically closed after the consumer is executed.
         *
         * @param stream the {@link Consumer} to process the {@link Stream}
         */
        public void of(final Consumer<Stream<T>> stream) {

With **FastAPI** it's very easy (thanks to Starlette), check the docs: [Testing](../tutorial/testing.md){.internal-link target=_blank}

After you have tests, then you can upgrade the **FastAPI** version to a more recent one, and make sure that all your code is working correctly by running your tests.

If everything is working, or after you make the necessary changes, and all your tests are passing, then you can pin your `fastapi` to that new recent version.

# Background Tasks - `BackgroundTasks`

You can declare a parameter in a *path operation function* or dependency function with the type `BackgroundTasks`, and then you can use it to schedule the execution of background tasks after the response is sent.

You can import it directly from `fastapi`:

```python
from fastapi import BackgroundTasks
```