ExceptionScoreBooster booster2 = new ExceptionScoreBooster();
        TestScoreBooster booster3 = new TestScoreBooster(300L);

        scoreUpdater.addScoreBooster(booster1);
        scoreUpdater.addScoreBooster(booster2);
        scoreUpdater.addScoreBooster(booster3);

        String result = scoreUpdater.execute();
        assertTrue(result.contains("TestScoreBooster : 100"));

    /**
     * Enables this score booster.
     */
    protected void enable() {
        final ScoreUpdater scoreUpdater = ComponentUtil.getComponent("scoreUpdater");
        scoreUpdater.addScoreBooster(this);
    }

    /**
     * Updates the score of documents.
     * @param params The parameters for the update.
     * @return The number of updated documents.
     */