}
        }.register();
    }

    public void test_integer() {
        final DocBoostMatcher docBoostMatcher = new DocBoostMatcher();
        docBoostMatcher.setBoostExpression("10");
        docBoostMatcher.setMatchExpression("data1 > 10");

        final Map<String, Object> map = new HashMap<String, Object>();

        assertTrue(0.0f == docBoostMatcher.getValue(map));

        return boostExpression;
    }

    /**
     * Sets the boost expression used to calculate boost values.
     *
     * @param expression the boost expression string
     */
    public void setBoostExpression(final String expression) {
        boostExpression = expression;
    }

    /**
     * Gets the current match expression.
     *
     * @return the match expression string
     */