检查器框架、-Xlint:all 和 JUnit
Checker Framework, -Xlint:all and JUnit
我试图从一开始就保持一个非常干净和严格的设置的项目,包括:
- 使用 the Checker Framework.
- 启用所有编译器警告并将它们视为错误(
-Xlint:all
和 -Werror
)。
- 使用 JUnit.
以下是 Maven pom.xml
的相关部分:
<dependencies>
<!-- Annotations: nullness, etc -->
<dependency>
<groupId>org.checkerframework</groupId>
<artifactId>checker-qual</artifactId>
<version>${checkerframework.version}</version>
</dependency>
<dependency>
<groupId>org.checkerframework</groupId>
<artifactId>jdk8</artifactId>
<version>${checkerframework.version}</version>
</dependency>
<dependency>
<groupId>org.junit.jupiter</groupId>
<artifactId>junit-jupiter-engine</artifactId>
<version>${junit.jupiter.version}</version>
<scope>test</scope>
</dependency>
</dependencies>
<build>
<pluginManagement>
<plugins>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-compiler-plugin</artifactId>
<version>3.8.0</version>
<configuration>
<annotationProcessorPaths>
<path>
<groupId>org.checkerframework</groupId>
<artifactId>checker</artifactId>
<version>${checkerframework.version}</version>
</path>
</annotationProcessorPaths>
<annotationProcessors>
<!-- Add all the checkers you want to enable here -->
<annotationProcessor>org.checkerframework.checker.nullness.NullnessChecker
</annotationProcessor>
</annotationProcessors>
<compilerArgs>
<arg>-Xbootclasspath/p:${annotatedJdk}</arg>
<arg>-Xlint:all</arg>
<arg>-Werror</arg>
</compilerArgs>
</configuration>
</plugin>
<plugin>
<artifactId>maven-surefire-plugin</artifactId>
<version>3.0.0-M1</version>
</plugin>
</plugins>
</pluginManagement>
</build>
不幸的是,当我引入一个使用 @Test
注释的测试 class 时,我收到以下编译警告并因此出现构建错误:
Warning:java: No processor claimed any of these annotations: org.junit.jupiter.api.Test
如何避免此警告?
找到解决方案:可以使用 -Xlint:-processing
消除此特定警告:
<build>
<pluginManagement>
<plugins>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-compiler-plugin</artifactId>
<version>3.8.0</version>
<configuration>
...
<compilerArgs>
<arg>-Xbootclasspath/p:${annotatedJdk}</arg>
<arg>-Xlint:all</arg>
<!-- Silence warning "No processor claimed any of these annotations". One of the
annotations that would trigger it is org.junit.jupiter.api.Test -->
<arg>-Xlint:-processing</arg>
<arg>-Werror</arg>
</compilerArgs>
</configuration>
</plugin>
</plugins>
</pluginManagement>
</build>
我试图从一开始就保持一个非常干净和严格的设置的项目,包括:
- 使用 the Checker Framework.
- 启用所有编译器警告并将它们视为错误(
-Xlint:all
和-Werror
)。 - 使用 JUnit.
以下是 Maven pom.xml
的相关部分:
<dependencies>
<!-- Annotations: nullness, etc -->
<dependency>
<groupId>org.checkerframework</groupId>
<artifactId>checker-qual</artifactId>
<version>${checkerframework.version}</version>
</dependency>
<dependency>
<groupId>org.checkerframework</groupId>
<artifactId>jdk8</artifactId>
<version>${checkerframework.version}</version>
</dependency>
<dependency>
<groupId>org.junit.jupiter</groupId>
<artifactId>junit-jupiter-engine</artifactId>
<version>${junit.jupiter.version}</version>
<scope>test</scope>
</dependency>
</dependencies>
<build>
<pluginManagement>
<plugins>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-compiler-plugin</artifactId>
<version>3.8.0</version>
<configuration>
<annotationProcessorPaths>
<path>
<groupId>org.checkerframework</groupId>
<artifactId>checker</artifactId>
<version>${checkerframework.version}</version>
</path>
</annotationProcessorPaths>
<annotationProcessors>
<!-- Add all the checkers you want to enable here -->
<annotationProcessor>org.checkerframework.checker.nullness.NullnessChecker
</annotationProcessor>
</annotationProcessors>
<compilerArgs>
<arg>-Xbootclasspath/p:${annotatedJdk}</arg>
<arg>-Xlint:all</arg>
<arg>-Werror</arg>
</compilerArgs>
</configuration>
</plugin>
<plugin>
<artifactId>maven-surefire-plugin</artifactId>
<version>3.0.0-M1</version>
</plugin>
</plugins>
</pluginManagement>
</build>
不幸的是,当我引入一个使用 @Test
注释的测试 class 时,我收到以下编译警告并因此出现构建错误:
Warning:java: No processor claimed any of these annotations: org.junit.jupiter.api.Test
如何避免此警告?
找到解决方案:可以使用 -Xlint:-processing
消除此特定警告:
<build>
<pluginManagement>
<plugins>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-compiler-plugin</artifactId>
<version>3.8.0</version>
<configuration>
...
<compilerArgs>
<arg>-Xbootclasspath/p:${annotatedJdk}</arg>
<arg>-Xlint:all</arg>
<!-- Silence warning "No processor claimed any of these annotations". One of the
annotations that would trigger it is org.junit.jupiter.api.Test -->
<arg>-Xlint:-processing</arg>
<arg>-Werror</arg>
</compilerArgs>
</configuration>
</plugin>
</plugins>
</pluginManagement>
</build>