assertEquals( false, expr.convertToBoolean(new Long(0)));
assertEquals( true, expr.convertToBoolean(new Long(1)));
assertEquals( true, expr.convertToBoolean(new Double(-1.0)));
assertEquals( false, expr.convertToBoolean(new Double(0.0)));
assertEquals( true, expr.convertToBoolean(new Double(1.0)));
assertEquals( true, expr.convertToBoolean("a"));
assertEquals( false, expr.convertToBoolean(""));
assertEquals( true, expr.convertToBoolean("true"));
assertEquals( false, expr.convertToBoolean("false"));