为什么maven不会从测试类生成源代码？

Question

I have some test-classes using Querydsl for my unit tests. Querydsl normally generates a query type class but if the classes are in the test directory the class will not be generated. As soon as I put the files in the src/main and compile with maven it works fine. Because I use the classes only in my tests I don't want to put these files in this directory. Can someone help me with that ?
My directory structure
src/main/java
src/main/resources
src/test/java/
src/test/resources

As I said putting the files in this directory "src/main/java" the query type class will be generated, but putting the files in this directory src/test/java/ the type class will not be generated.

Maven APT plugin which generates the query types used by Querydsl

            <plugin>
            <groupId>com.mysema.maven</groupId>
            <artifactId>apt-maven-plugin</artifactId>
            <version>1.1.3</version>
            <executions>
                <execution>
                    <goals>
                        <goal>process</goal>
                    </goals>
                    <configuration>
                        <outputDirectory>target/generated-test-sources/java</outputDirectory>
                        <processor>com.querydsl.apt.jpa.JPAAnnotationProcessor</processor>
                    </configuration>
                </execution>
            </executions>
            <dependencies>
                <dependency>
                    <groupId>com.querydsl</groupId>
                    <artifactId>querydsl-apt</artifactId>
                    <version>4.1.0</version>
                </dependency>
            </dependencies>
        </plugin>

Answer 1

Can across this same issue. I found this solution to also generate the 'Q' entities for test sources. The trick was to use the test-process goal of the plugin. Adding it to the generate-test-sources phase generates them at the correct time (test-compile).

        <plugin>
            <groupId>com.mysema.maven</groupId>
            <artifactId>apt-maven-plugin</artifactId>
            <version>${apt.maven.plugin.version}</version>
            <executions>
                <execution>
                    <id>generate-source-entities</id>
                    <phase>generate-sources</phase>
                    <goals>
                        <goal>process</goal>
                    </goals>
                    <configuration>
                        <outputDirectory>${project.build.directory}/generated</outputDirectory>
                        <processor>com.querydsl.apt.jpa.JPAAnnotationProcessor</processor>
                    </configuration>
                </execution>
                <execution>
                    <id>generate-test-entities</id>
                    <phase>generate-test-sources</phase>
                    <goals>
                        <goal>test-process</goal>
                    </goals>
                    <configuration>
                        <outputDirectory>${project.build.directory}/generated</outputDirectory>
                        <processor>com.querydsl.apt.jpa.JPAAnnotationProcessor</processor>
                    </configuration>
                </execution>
            </executions>
        </plugin>

Note this generates the entities for both the main and test sources.