"steps": [
              {
                "color": "green",
                "value": null
              }
            ]
          },
          "unit": "dtdurations"
        },
        "overrides": []
      },
      "gridPos": {
        "h": 6,
        "w": 3,
        "x": 0,
        "y": 0
      },
      "id": 1,
      "maxDataPoints": 100,
      "options": {
        "colorMode": "value",

              },
              {
                "color": "red",
                "value": 80
              }
            ]
          },
          "unit": "short"
        },
        "overrides": []
      },
      "gridPos": {
        "h": 5,
        "w": 6,
        "x": 0,
        "y": 0
      },
      "id": 21,
      "maxDataPoints": 100,
      "options": {
        "colorMode": "value",

    }

    /**
     * Initializes the extension override map by loading configuration from FessConfig.
     * The mappings are loaded from the crawler.document.mimetype.extension.overrides property,
     * where each line contains a mapping in the format ".ext=mime/type".
     */
    @PostConstruct
    public void init() {
        final String overrides = ComponentUtil.getFessConfig().getCrawlerDocumentMimetypeExtensionOverrides();

                "value": null
              },
              {
                "color": "semi-dark-red",
                "value": 80
              }
            ]
          }
        },
        "overrides": []
      },
      "gridPos": {
        "h": 6,
        "w": 12,
        "x": 0,
        "y": 0
      },
      "id": 52,
      "options": {
        "displayMode": "basic",

FastAPI will still be able to override it.

///

Then you can reset your overrides (remove them) by setting `app.dependency_overrides` to be an empty `dict`:

```Python
app.dependency_overrides = {}
```

/// tip

              },
              {
                "color": "red",
                "value": 80
              }
            ]
          },
          "unit": "short"
        },
        "overrides": [
          {
            "matcher": {
              "id": "byName",
              "options": "Replication Errors"
            },
            "properties": [
              {
                "id": "color",

              },
              {
                "color": "red",
                "value": 80
              }
            ]
          },
          "unit": "bytes"
        },
        "overrides": [
          {
            "matcher": {
              "id": "byName",
              "options": "Replication Errors"
            },
            "properties": [
              {
                "id": "color",

    final List<Object> differentlyOverriddenAnnotatedInSubclassGoodEvents = new ArrayList<>();

    @Override
    public void overriddenNotAnnotatedInSubclass(Object o) {
      super.overriddenNotAnnotatedInSubclass(o);
    }

    @Subscribe
    @Override
    // We are testing how we treat an override with the same behavior and annotations.
    @SuppressWarnings("RedundantOverride")

    final List<Object> differentlyOverriddenAnnotatedInSubclassGoodEvents = new ArrayList<>();

    @Override
    public void overriddenNotAnnotatedInSubclass(Object o) {
      super.overriddenNotAnnotatedInSubclass(o);
    }

    @Subscribe
    @Override
    // We are testing how we treat an override with the same behavior and annotations.
    @SuppressWarnings("RedundantOverride")

# 用覆寫測試相依 { #testing-dependencies-with-overrides }

## 在測試期間覆寫相依 { #overriding-dependencies-during-testing }

有些情境你可能想在測試時覆寫（override）某個相依（dependency）。

你不希望執行原本的相依（以及它可能具有的任何子相依）。

相反地，你想提供一個只在測試期間使用的不同相依（可能只在特定測試中），並回傳一個可以在原本相依值被使用之處使用的值。

### 使用情境：外部服務 { #use-cases-external-service }

例如你有一個需要呼叫的外部驗證提供者。

你傳送一個 token，它會回傳一個已驗證的使用者。

這個提供者可能按每個請求收費，而且呼叫它可能比在測試中使用固定的模擬使用者多花一些時間。

你大概只想對外部提供者測試一次，而不需要在每個測試都呼叫它。