resolutionStrategy.capabilitiesResolution.all {
            selectHighestVersion()
        }
    }
}

fun readCapabilitiesFromJson() {
    val capabilitiesFile = repoRoot().file("gradle/dependency-management/capabilities.json").asFile
    val capabilities: List<CapabilitySpec> = readCapabilities(capabilitiesFile)
    capabilities.forEach {
        it.configure(dependencies.components, configurations)
    }
}

  <dependencies>
    <dependency>
      <groupId>org.apache.maven.artifact</groupId>
      <artifactId>maven-artifact</artifactId>
      <version>3.0-SNAPSHOT</version>
    </dependency>
    <dependency>
      <groupId>org.codehaus.plexus</groupId>
      <artifactId>plexus-utils</artifactId>
      <version>1.1</version>
    </dependency>
    <dependency>
      <groupId>org.codehaus.plexus</groupId>

      </plugin>
    </plugins>
  </build>
  <dependencies>
    <dependency>
      <groupId>org.codehaus.plexus</groupId>
      <artifactId>plexus-component-api</artifactId>
    </dependency>
    <dependency>
      <groupId>org.codehaus.plexus</groupId>
      <artifactId>plexus-utils</artifactId>
    </dependency>
    <dependency>
      <groupId>org.codehaus.plexus</groupId>

  </contributors>
  <dependencies>
    <dependency>
      <groupId>slide</groupId>
      <artifactId>slide-webdavlib</artifactId>
      <version>2.1</version>
    </dependency>
    <dependency>
      <groupId>commons-logging</groupId>
      <artifactId>commons-logging</artifactId>
      <version>1.0.4</version>
      <scope>runtime</scope>
    </dependency>
    <dependency>
      <groupId>it.could</groupId>

        <version>1.2-alpha-7</version>
      </dependency>
      <dependency>
        <groupId>org.codehaus.plexus</groupId>
        <artifactId>plexus-component-api</artifactId>
        <version>1.0-alpha-16</version>
      </dependency>
      <dependency>
        <groupId>org.codehaus.plexus</groupId>
        <artifactId>plexus-utils</artifactId>
        <version>1.3</version>
      </dependency>
    </dependencies>
  </dependencyManagement>

      </dependency>
      <dependency>
        <groupId>org.codehaus.plexus</groupId>
        <artifactId>plexus-utils</artifactId>
        <version>1.0.4</version>
      </dependency>
      <dependency>
        <groupId>org.apache.maven.wagon</groupId>
        <artifactId>wagon-provider-api</artifactId>
        <version>1.0-alpha-5</version>
      </dependency>
      <dependency>

      </plugin>
    </plugins>
  </build>
  <dependencies>
    <dependency>
      <groupId>org.codehaus.plexus</groupId>
      <artifactId>plexus-component-api</artifactId>
    </dependency>
    <dependency>
      <groupId>org.codehaus.plexus</groupId>
      <artifactId>plexus-utils</artifactId>
    </dependency>
    <dependency>
      <groupId>org.codehaus.plexus</groupId>

一般只要测试一次外部验证应用就够了，不必每次测试都去调用。

此时，最好覆盖调用外部验证应用的依赖项，使用返回模拟测试用户的自定义依赖项就可以了。

### 使用 `app.dependency_overrides` 属性

对于这些用例，**FastAPI** 应用支持 `app.dependcy_overrides` 属性，该属性就是**字典**。

要在测试时覆盖原有依赖项，这个字典的键应当是原依赖项（函数），值是覆盖依赖项（另一个函数）。

这样一来，**FastAPI** 就会调用覆盖依赖项，不再调用原依赖项。

```Python hl_lines="26-27  30"
{!../../../docs_src/dependency_testing/tutorial001.py!}
```

!!! tip "提示"

    **FastAPI** 应用中的任何位置都可以实现覆盖依赖项。

  <artifactId>t05-b</artifactId>
  <packaging>jar</packaging>
  <version>2.0</version>
  <dependencies>
    <dependency>
      <groupId>maven-test</groupId>
      <artifactId>t05-c</artifactId>
      <version>1.0</version>
      <type>jar</type>
      <scope>compile</scope>
    </dependency>
    <dependency>
      <groupId>maven-test</groupId>
      <artifactId>t05-d</artifactId>
      <version>1.1</version>

  <artifactId>t07-b</artifactId>
  <packaging>jar</packaging>
  <version>1.1</version>
  <dependencies>
    <dependency>
      <groupId>maven-test</groupId>
      <artifactId>t07-c</artifactId>
      <version>1.0</version>
      <type>jar</type>
      <scope>compile</scope>
    </dependency>
    <dependency>
      <groupId>maven-test</groupId>
      <artifactId>t07-d</artifactId>
      <version>1.1</version>