Re: How to unit test for stuff using InstalledFileLocator?

Mock-up your own InstallFileLocator class and add it to the lookup so that your JUnit tests will finds the resources needed.  The following is an example taken from the netbeans source-code for adding ant resources to the default InstalledFileLocator for tests purposes.

    static {
        MockServices.setServices(IFL.class);
    }
    
    public static final class IFL extends InstalledFileLocator {
        public File locate(String name, String module, boolean loc) {
            String antHomeS = System.getProperty("test.ant.home");
            if (antHomeS == null) {
                throw new Error("Tests will not run unless test.ant.home and test.ant.bridge system properties are defined");
            }
            final File antHome = new File(antHomeS);
            final File antBridge = new File(System.getProperty("test.ant.bridge"));
            final File antJar = new File(new File(antHome, "lib"), "ant.jar");
            if (name.equals("ant")) {
                return antHome;
            } else if (name.equals("ant/nblib/bridge.jar")) {
                return antBridge;
            } else if (name.equals("ant/nblib")) {
                return antBridge.getParentFile();
            } else if (name.equals("ant/lib/ant.jar")) {
                return antJar;
            } else {
                return null;
            }
        }
    }