NetBeans module - How to get instance of FileObject for testing

Question

I'm trying to write some unit tests for my NetBeans module, but i'm unable to get an instance of the FileObject class:

    @Before
    public void setup() throws URISyntaxException{
        URL url = this.getClass().getResource("/project-template/");
        file = new File(url.toURI());

    }

    @Test
    public void testIsProject() throws URISyntaxException {
        FileObject fo = FileUtil.toFileObject(file);

        MyProjectFactory instance = new MyProjectFactory();
        assertTrue( instance.isProject(fo));

    }

The "project-template" folder, under the resources directory contains a valid project,
and altouhg the file is correct, FileObject fo is always null.

Answer 1

Answering my own question, the MasterFS module is needed for the toFileObject method to work. Just add this to the pom.xml:

<dependency>
        <groupId>org.netbeans.modules</groupId>
        <artifactId>org-netbeans-modules-masterfs</artifactId>
        <version>RELEASE69</version>
        <scope>test</scope>
</dependency>