how to select a particular row from a table?

I want to know how to select a particular row from a table, shown in a gadget.

On automating am getting the following code:

use strict;

use warnings;
use Time::HiRes qw(sleep);
use Test::WWW::Selenium;
use Test::More "no_plan";
use Test::Exception;

my $sel = Test::WWW::Selenium->new( host => "localhost", 
                                    port => 4444, 
                                    browser => "*chrome", 
                                    browser_url => "http://10.102.163.3/" );

$sel->open_ok("/admin_ui/svm/html/main.html");
$sel->click_ok("//table[1]/tbody/tr/td[1]/div/table/tbody/tr/td[2]/img");    
$sel->click_ok("//input[\@value='Yes']");

Can anyone please explain the following line in the above coding?

$sel->click_ok("//table[1]/tbody/tr/td[1]/div/table/tbody/tr/td[2]/img");

Also, am getting the same recording, every time when i select a row and delete.

Can anyone please explain how to check for a particular value as 开发者_如何学Goshown in the above snapshot and then select that row and delete it?

Please explain me with code.

thanks in advance.

---

Can anyone please explain the following line in the above coding?
$sel->click_ok("//table[1]/tbody/tr/td[1]/div/table/tbody/tr/td[2]/img");

$sel is a reference to an object of type Test::WWW::Selenium

->click_ok() invokes the click_ok method of that object.

The argument to this method is a locator

"//table[1]/tbody/tr/td[1]/div/table/tbody/tr/td[2]/img" is an xpath expression that specifies the HTML element to be acted on.

// indicates that the locator type is an xpath expression.

table[1] specifies the first occurence of a table (where there may be several successive tables)

...

td[2] specifies the second occurence of a table data element.

The other parts should be obvious. Overall it specifies an image in the second column of a nested table.

---

(Update)

Can anyone please explain how to check for a particular value as shown in the above snapshot and then select that row

To select a tr that contains an element with an attribute named value with a value of "Yes" you can use

//*[@value="Yes"]/ancestor::tr

---

I use the following code to test xpath expressions

#!/usr/bin/perl
use strict;
use warnings;
use XML::LibXML;

my $xml = <<END;
<table>
  <tr>
    <td>Foo</td>
    <td><input value="Yes" /></td>
  </tr>
  <tr>
    <td>bar</td>
    <td><a href="/woo.html">Woo</a></td>
  </tr>
</table>
END

my $xpath = '//*[@value="Yes"]/ancestor::tr';


my $parser = XML::LibXML->new;
my $doc = $parser->parse_string($xml);
my $n = 0;
for my $node ($doc->findnodes($xpath)) {
  print ++$n, ': ', $node->toString(), "\n";
}