Count Of Hidden Rows in WebTable By Using Selenium - selenium-webdriver

Question

I have a hide button in the application that hides duplicate data entries on web table. I have been trying to capture the number of hidden rows. See html and my approaches below. Every attempt I have tried ended up with 0. However, the result should be 2.
HTML CODE:
<tbody>
<tr role = "row" class="odd">...<tr/>
<tr role = "row" class="even">...<tr/>
<tr role = "row" class="odd">...<tr/>
<tr role = "row" class="even">...<tr/>
<tr role = "row" class="odd">...<tr/>
<tr role = "row" class="odd duplicate" style="display: none;" >...<tr/>
<tr role = "row" class="even duplicate" style="display: none;" >...<tr/>
</tbody>
def getInvisibleTableRowCount()
{
WebDriver driver = DriverFactory.getWebDriver()
WebElement table = driver.findElement(By.xpath("//*[#id='DataTables_Table_0']/tbody"))
List<WebElement> rows_table= table.findElements(By.cssSelector("[display=none]"));
int rowSize = rows_table.size();
return rowSize;
}
Here is my other attempt:
def getInvisibleTableRowCount()
{
WebDriver driver = DriverFactory.getWebDriver()
WebElement table = driver.findElement(By.xpath("//*[#id='DataTables_Table_0']/tbody"))
List<WebElement> rows_table= table.findElements(By.tagName("tr[not(contains(#style,'display: none;'))]"));
int rowSize = rows_table.size();
return rowSize;
}
If I ran the xpath as //*[#id='DataTables_Table_0']/tbody/tr[not(contains(#style,'display: none;'))] , I can find the hidden rows on the browser.
I have also tried this:
def getInvisibleTableRowCount()
{
WebDriver driver = DriverFactory.getWebDriver()
WebElement table = driver.findElement(By.xpath("//*[#id='DataTables_Table_0']/tbody"))
List<WebElement> rows_table= table.findElements(By.tagName("tr"));
int rowSize = rows_table.size();
for(WebElement row: rows_table)
{
if(row.isDisplayed()==false)
{
rowSize = rowSize -1;
}
}
return rowSize;
}
After #Hac's comment, I tried JQuery. I ran the jQuery on browser, it works with no problem. But I get a "NULL" value returned in my function. I double checked the jQuery string that prompts correct in the comment line.
#Keyword
def getTableRowCountAfterHiding()
{
def jQuery='$'+'("#DataTables_Table_0 tbody tr:visible").length'
WebUI.comment(jQuery);
def visibleRowCounts = new utils.ExecuteJavaScript().executeJavaScript(jQuery);
return visibleRowCounts;
}
I defined utils to run JS as it is in below:
public class ExecuteJavaScript {
//This keyword is designed to execute JS.
#Keyword
def executeJavaScript(String javascript) {
((JavascriptExecutor) DriverFactory.getWebDriver()).executeScript(javascript)
}
}

Answer 1

This worked:
def getTableRowCountAfterHiding()
{
WebDriver driver = DriverFactory.getWebDriver()
List<WebElement> table = driver.findElements(By.xpath("//*[#id='DataTables_Table_0']/tbody/tr[not(contains(#style,'display: none;'))]"))
int rowSize = table.size();
return rowSize;
}