Road to reading SVG graph values in Webdriver

Here is example of the reading svg graph values in java webdriver.

package com.test;

import java.util.List;
import java.util.concurrent.TimeUnit;
import org.openqa.selenium.By;
import org.openqa.selenium.WebDriver;
import org.openqa.selenium.WebElement;
import org.openqa.selenium.firefox.FirefoxDriver;
import org.testng.annotations.AfterSuite;
import org.testng.annotations.BeforeSuite;
import org.testng.annotations.Test;

public class ReadSVGChartData {
 
    public WebDriver driver;
 
    @BeforeSuite
    public void setUp(){
         driver = new FirefoxDriver();
         driver.manage().timeouts().implicitlyWait(5, TimeUnit.SECONDS);
    }

    @AfterSuite
    public void testDown(){
        driver.quit();
    }
 
    @Test
    public void testChart1() throws InterruptedException {
  
        driver.get("http://yuilibrary.com/yui/docs/charts/charts-column.html");
  
        //read chart value
        List elements = driver.findElements(By.xpath("//*[contains(@class,'yui3-svgRect yui3-seriesmarker')]"));
        WebElement toolTip = driver.findElement(By.xpath("//div[contains(@class,'yui3-chart-tooltip')]"));
        System.out.println("Specify Chart Type Data");
        for (WebElement el:  elements)
        {
             el.click(); 
             String chartValue = toolTip.getText();
             System.out.println(chartValue);
        }  
    }
 
    @Test
    public void testChart2(){  
        //open url
        driver.get("http://yuilibrary.com/yui/docs/charts/charts-dualaxes.html");
  
        //read chart value
        List elements = driver.findElements(By.xpath("//*[contains(@class,'yui3-svgCircle yui3-seriesmarker')]"));
  
        WebElement toolTip = driver.findElement(By.xpath("//div[contains(@class,'yui3-chart-tooltip')]"));
        System.out.println("\nDual Axes Chart Data");
        for (WebElement el:  elements)
        {
             el.click(); 
             String chartValue = toolTip.getText();
             System.out.println(chartValue);
        }
    }
}