For these cases, your **FastAPI** application has an attribute `app.dependency_overrides`, it is a simple `dict`.

To override a dependency for testing, you put as a key the original dependency (a function), and as the value, your dependency override (another function).

And then **FastAPI** will call that override instead of the original dependency.

@Deprecated
class MavenBuildTimestampTest {
    @Test
    void testMavenBuildTimestampUsesUTC() {
        Properties interpolationProperties = new Properties();
        interpolationProperties.put("maven.build.timestamp.format", "yyyyMMdd'T'HHmm'Z'");
        MavenBuildTimestamp timestamp = new MavenBuildTimestamp(new Date(), interpolationProperties);
        String formattedTimestamp = timestamp.formattedTimestamp();

                    descriptors.putIfAbsent(key, clone(desc));
                }
            }
        }
        return clone(desc);
    }

    @Override
    public void put(Key cacheKey, PluginDescriptor pluginDescriptor) {
        descriptors.put(cacheKey, clone(pluginDescriptor));
    }

    protected static PluginDescriptor clone(PluginDescriptor original) {
        return new PluginDescriptor(original);
    }

   * @throws UnsupportedOperationException always
   */
  @CanIgnoreReturnValue
  @Deprecated
  @Override
  @DoNotCall("Always throws UnsupportedOperationException")
  public @Nullable B put(TypeToken<? extends @NonNull B> key, @ParametricNullness B value) {
    throw new UnsupportedOperationException("Please use putInstance() instead.");
  }

  /**
   * Not supported. Use {@link #putInstance} instead.
   *

	xl := z.serverPools[0].sets[0]

	bucket := "test-bucket"
	object := "test-object"

	err = obj.MakeBucket(ctx, bucket, MakeBucketOptions{})
	if err != nil {
		t.Fatal(err)
	}

	// Put an initial object so it exists
	_, err = obj.PutObject(ctx, bucket, object,
		mustGetPutObjReader(t, bytes.NewReader([]byte("initial-value")),
			int64(len("initial-value")), "", ""), ObjectOptions{})
	if err != nil {

            currentClass.setOuterClassName(outerClass.getClassName());
        }
        findAnnotations(typeDeclaration, currentClass);

        allClasses.add(currentClass);
        repository.put(className, currentClass);

        classStack.push(currentClass);
        action.run();
        classStack.pop();
    }

    private ClassMetaData getCurrentClass() {
        return classStack.peek();

     */
    protected static Map<String, String> createItem(final Object label, final Object value) {
        final Map<String, String> map = new HashMap<>(2);
        map.put(Constants.ITEM_LABEL, label != null ? label.toString() : StringUtil.EMPTY);
        map.put(Constants.ITEM_VALUE, value != null ? value.toString() : StringUtil.EMPTY);
        return map;
    }

    return (entry == ABSENT) ? null : keys[entry];
  }

  @CanIgnoreReturnValue
  @Override
  public @Nullable V put(@ParametricNullness K key, @ParametricNullness V value) {
    return put(key, value, false);
  }

  private @Nullable V put(@ParametricNullness K key, @ParametricNullness V value, boolean force) {
    int keyHash = Hashing.smearedHash(key);

     * .
     */
    @Test
    public void testIsNotEmptyMapOfQQ() {
        final HashMap<String, String> map = new HashMap<String, String>();
        map.put("key", "value");
        assertThat(CollectionsUtil.isNotEmpty(map), is(true));
    }

        Object newValue = new Object();
        assertThat(cache.asMap().put(entry.getKey(), newValue)).isSameInstanceAs(entry.getValue());
        // don't let the new entry get GCed
        warmed.add(entryOf(entry.getKey(), newValue));
        Object newKey = new Object();
        assertThat(cache.asMap().put(newKey, entry.getValue())).isNull();
        // this getUnchecked() call shouldn't be a cache miss; verified below