# Testing Dependencies with Overrides { #testing-dependencies-with-overrides }

## Overriding dependencies during testing { #overriding-dependencies-during-testing }

There are some scenarios where you might want to override a dependency during testing.

You don't want the original dependency to run (nor any of the sub-dependencies it might have).

/// info

The parameter `summary` is available in OpenAPI 3.1.0 and above, supported by FastAPI 0.99.0 and above.

///

## Overriding the defaults { #overriding-the-defaults }

Using the information above, you can use the same utility function to generate the OpenAPI schema and override each part that you need.

But if for some reason your clients depend on the old behavior, you can revert to it by overriding the method `make_not_authenticated_error` in your security classes.

For example, you can create a subclass of `HTTPBearer` that returns a `403 Forbidden` error instead of the default `401 Unauthorized` error:

import okhttp3.DelegatingSSLSocketFactory
import okhttp3.EventListener
import okhttp3.OkHttpClient
import okhttp3.Request
import org.junit.jupiter.api.Tag
import org.junit.jupiter.api.Test

/**
 * Tests for ALPN overriding on Android.
 */
@Tag("Remote")
class AlpnOverrideTest {
  class CustomSSLSocketFactory(
    delegate: SSLSocketFactory,
  ) : DelegatingSSLSocketFactory(delegate) {

/**
 * Implementation of {@link ImmutableMap} backed by a non-empty {@link java.util.EnumMap}.
 *
 * @author Louis Wasserman
 */
@GwtCompatible
@SuppressWarnings("serial") // we're overriding default serialization
final class ImmutableEnumMap<K extends Enum<K>, V> extends IteratorBasedImmutableMap<K, V> {
  static <K extends Enum<K>, V> ImmutableMap<K, V> asImmutable(EnumMap<K, V> map) {
    switch (map.size()) {

        language: ['java']
        # Learn more...
        # https://docs.github.com/en/github/finding-security-vulnerabilities-and-errors-in-your-code/configuring-code-scanning#overriding-automatic-language-detection

    steps:
    - name: Checkout repository
      uses: actions/checkout@v4

    # Initializes the CodeQL tools for scanning.
    - name: Initialize CodeQL

/**
 * {@link FluentFuture} that forwards all calls to a delegate.
 *
 * <p><b>Warning:</b> The methods of {@code ForwardingFluentFuture} forward <b>indiscriminately</b>
 * to the methods of the delegate. For example, overriding {@link #get(long, TimeUnit)} alone
 * <b>will not</b> change the behavior of {@link #get()}, which can lead to unexpected behavior. In
 * this case, you should override {@code get()} as well.
 *

 * href="http://en.wikipedia.org/wiki/Decorator_pattern">decorator pattern</a>.
 *
 * <p><b>Warning:</b> The methods of {@code ForwardingFuture} forward <b>indiscriminately</b> to the
 * methods of the delegate. For example, overriding {@link #get(long, TimeUnit)} alone <b>will
 * not</b> change the behavior of {@link #get()}, which can lead to unexpected behavior. In this
 * case, you should override {@code get()} as well.
 *

* `summary`：API 的簡短摘要。
* `description`：API 的描述，可包含 Markdown，會顯示在文件中。
* `routes`：路由列表，也就是所有已註冊的路徑操作。來源為 `app.routes`。

/// info

`summary` 參數在 OpenAPI 3.1.0 以上可用，且需 FastAPI 0.99.0 以上版本支援。

///

## 覆寫預設行為 { #overriding-the-defaults }

基於上述資訊，你可以用相同的工具函式來產生 OpenAPI 結構，並覆寫你需要客製的部分。

例如，我們要加入 [ReDoc 的 OpenAPI 擴充，插入自訂 logo](https://github.com/Rebilly/ReDoc/blob/master/docs/redoc-vendor-extensions.md#x-logo)。

import org.jspecify.annotations.Nullable;

/**
 * Implementation of {@link ImmutableSet} backed by a non-empty {@link java.util.EnumSet}.
 *
 * @author Jared Levy
 */
@GwtCompatible
@SuppressWarnings("serial") // we're overriding default serialization
final class ImmutableEnumSet<E extends Enum<E>> extends ImmutableSet<E> {
  static <E extends Enum<E>> ImmutableSet<E> asImmutable(EnumSet<E> set) {
    switch (set.size()) {
      case 0: