then:
        result.task(":licenseHeaders").outcome == TaskOutcome.FAILED
        assertOutputContains(result.output, "> Check failed. License header problems were found. Full details: ./build/reports/licenseHeaders/rat.xml")
        assertOutputContains(result.output, "./src/main/java/org/acme/UnknownLicensed.java")
        assertOutputContains(result.output, "./src/main/java/org/acme/UnapprovedLicensed.java")

下图显示的是子应用的 API 文档，也是只包括其自有的*路径操作*，所有这些路径操作都在 `/subapi` 子路径前缀下。

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

两个用户界面都可以正常运行，因为浏览器能够与每个指定的应用或子应用会话。

### 技术细节：`root_path` { #technical-details-root-path }

以上述方式挂载子应用时，FastAPI 使用 ASGI 规范中的 `root_path` 机制处理挂载子应用路径之间的通信。

这样，子应用就可以为自动文档使用路径前缀。

并且子应用还可以再挂载子应用，一切都会正常运行，FastAPI 可以自动处理所有 `root_path`。

 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with this library; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 */

        }
        if (foundError) {
            throw new GradleException("Check failed for task '" + getPath() + "', see console log for details");
        }
    }

    private void logError(String element, String message) {
        foundError = true;
        getLogger().error("{} {} in [{}]", element, message, pomFile.getAsFile().get());
    }

 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with this library; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 */

 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with this library; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 */

INFO:     Application startup complete.
```

</div>

<details markdown="1">
<summary>关于命令 <code>fastapi dev</code>...</summary>

`fastapi dev` 命令会读取你的 `main.py` 文件，检测其中的 **FastAPI** 应用，并使用 [Uvicorn](https://www.uvicorn.dev) 启动服务器。

默认情况下，`fastapi dev` 会在本地开发时启用自动重载。

你可以在 [FastAPI CLI 文档](https://fastapi.tiangolo.com/zh/fastapi-cli/) 中了解更多。

</details>

### 检查 { #check-it }

            parent.appendChild(detailsSection);

            Element title = document.createElement("title");
            detailsSection.appendChild(title);
            title.appendChild(document.createTextNode("Method details"));

            for (MethodDoc methodDoc : classDoc.getClassMethods()) {
                methodDetailRenderer.renderTo(methodDoc, detailsSection);
            }

            parent.appendChild(detailsSection);

            Element title = document.createElement("title");
            detailsSection.appendChild(title);
            title.appendChild(document.createTextNode("Property details"));

            for (PropertyDoc classProperty : classDoc.getClassProperties()) {
                propertiesDetailRenderer.renderTo(classProperty, detailsSection);
            }

 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with this library; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 */