在Maven测试(lwjgl)中拾取本机JNI文件 [英] Pick up native JNI files in Maven test (lwjgl)

问题描述

我正在使用LWJGL和Maven创建一个程序，并且正在为图形代码编写单元测试.我的问题是让Maven将本机二进制文件放在类路径上，以便测试可以选择它.我无法克服错误:

I'm creating a program with LWJGL and Maven, and I'm writing unit tests for the graphical code. My problem is getting Maven to put the native binaries on the classpath so that the tests can pick it up. I can't get past the error:

java.lang.UnsatisfiedLinkError: no lwjgl in java.library.path

我已经将二进制文件解压缩到target/libs/native/，但是测试不会将它们打包.

I've gotten the binaries to unpack to target/libs/native/, but the tests won't pick them up.

这是我的pom:

 <project
    xmlns="http://maven.apache.org/POM/4.0.0"
    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
    xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-  4.0.0.xsd"
>
<modelVersion>4.0.0</modelVersion>

<groupId>com.ziroby.kata</groupId>
<artifactId>app</artifactId>
<version>0.0.1-SNAPSHOT</version>
<packaging>jar</packaging>

<properties>
    <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
    <lwjgl.version>2.6</lwjgl.version>
</properties>

<repositories>
    <repository>## Heading ##
        <id>lwjgl</id>
        <name>lwjgl</name>
        <url>http://adterrasperaspera.com/lwjgl</url>
    </repository>
</repositories>

<dependencies>
    <dependency>
        <groupId>org.hamcrest</groupId>
        <artifactId>hamcrest-library</artifactId>
        <version>1.2.1</version>
        <type>jar</type>
        <scope>test</scope>
    </dependency>
    <dependency>
        <groupId>org.jmock</groupId>
        <artifactId>jmock-junit4</artifactId>
        <version>2.5.1</version>
        <type>jar</type>
        <scope>test</scope>
    </dependency>

    <dependency>
        <groupId>junit</groupId>
        <artifactId>junit</artifactId>
        <version>4.8.2</version>
        <scope>test</scope>
    </dependency>
    <dependency>
        <groupId>org.lwjgl</groupId>
        <artifactId>lwjgl</artifactId>
        <version>${lwjgl.version}</version>
    </dependency>
    <dependency>
        <groupId>org.lwjgl</groupId>
        <artifactId>lwjgl-util</artifactId>
        <version>${lwjgl.version}</version>
    </dependency>
    <dependency>
        <groupId>org.lwjgl</groupId>
        <artifactId>lwjgl-native</artifactId>
        <version>2.6</version>
        <type>pom</type>
    </dependency>
</dependencies>
<build>
    <plugins>
        <plugin>
            <groupId>org.apache.maven.plugins</groupId>
            <artifactId>maven-dependency-plugin</artifactId>
            <configuration>
                <artifactItems>
                    <artifactItem>
                        <groupId>org.lwjgl</groupId>
                        <artifactId>lwjgl-native</artifactId>
                        <version>${lwjgl.version}</version>
                        <type>jar</type>
                        <outputDirectory>${project.build.directory}/libs/natives</outputDirectory>
                        <overWrite>true</overWrite>
                    </artifactItem>
                </artifactItems>
            </configuration>
            <executions>
                <execution>
                    <id>unpack</id>
                    <phase>generate-resources</phase>
                    <goals>
                        <goal>unpack</goal>
                    </goals>
                </execution>
            </executions>
        </plugin>
        <plugin>
            <groupId>org.apache.maven.plugins</groupId>
            <artifactId>maven-compiler-plugin</artifactId>
            <version>2.3.2</version>
            <configuration>
                <source>1.6</source>
                <target>1.6</target>
            </configuration>
        </plugin>
    </plugins>
</build>
</project>

我尝试了 Maven-在执行测试时将目录添加到classpath ，但这似乎是在谈论资源，而不是JNI库(并且它没有用).

I've tried Maven - Add directory to classpath while executing tests , but that seems to be talking about resources, not JNI libraries (and it didn't work).

为maven指定类路径是相反的问题:指定已经存在的东西类路径.

And Specifiy classpath for maven is the opposite problem: Specify things that are already on the classpath.

推荐答案

根据

surefire插件将启动VM，然后修改系统属性，然后再将控制权传递给junit测试类.对于VM来说为时已晚，在初始化VM时需要设置java.library.path.

the surefire plugin starts the VM and then modifies the system properties before passing control to the junit test classes. This is too late for the VM, which needs to have the java.library.path set up at the time the VM is initialized.

因此，我们需要在启动时提供通往Surefire的路径.以下工作:

So we need to give the path to Surefire at startup. The following worked:

        <plugin>
            <groupId>org.apache.maven.plugins</groupId>
            <artifactId>maven-surefire-plugin</artifactId>
            <configuration>
                <forkMode>once</forkMode>
                <argLine>-Djava.library.path=${project.build.directory}/libs/natives/win32:${project.build.directory}/libs/natives/linux:${project.build.directory}/libs/natives/macosx:${project.build.directory}/libs/natives/solaris</argLine>
            </configuration>
        </plugin>

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