With Selenium - how can I select one element per row randomly?

Question

I want to select one element per row in a table. The rows and columns don't have that actual value, it's just for a test.

The cssSelector for the row is div.table_row.
The cssSelector for the cell is div.table_cell.

How can I randomly select one element out of those 5 columns per row and then move to the next row and select another element randomly?

I tried doing this but of course it failed:

Random rnd = new Random();
List button = driver.findElements(By.cssSelector(RADIO_BUTTON));
button.get(rnd.nextInt(button.size())).click();

Where RADIO_BUTTON is the cssSelector div.radio_button. This will randomly select 10 radio buttons and the test will fail.

See table image here.

Trying this in selenium in Java. I am not familiar with parent and child elements in cssSelectors.
XPath is out of discussion since the classes are randomly generated and it will fail each time.

I want it to be something like this.

Thanks!

HTML page source:

CEH · Accepted Answer

I can provide a bit of code to get you started. This code will first find all table rows, then pick a random cell per row to select. I don't actually see any radio_button in the HTML you provided, so I am taking a guess and assuming

is the radio button element:

// init random
Random rnd = new Random();

// first get number of rows -- this returns 10
int rowCount = driver.findElements(By.xpath("//div[contains(@class, 'table_row')]")).size();

// then iterate the rows from 2-10 (WebElement lists are 1-based index, skip first header row)
for (int i = 2; i <= rowCount; i++)
{
    // get radio buttons for this row -- use i to get the row index
    // this returns 6
    List cells = driver.findElements(By.xpath("//div[contains(@class, 'table_row')][" + i + "]//div[@class='table_cell_text']")

    // get a random cell and click it -- start with 1 so we can skip first column
    cells.get(rnd.nextInt((cells.size() - 1) + 1).click();
}

I started the for loop at 2, because we don't want to look at the first row with the column headers a,b,c,d etc. I also specified rnd.nextInt to pick between 1 and cells.size(), so that we do not pick a cell that is in the first column with data 1,2,3,4 etc.

We use the line cells.get(rnd.nextInt((cells.size() - 1) + 1).click(); to ensure we are getting a list index that is greater than 0, but still within cells.size() range. rnd.nextInt(cells.size() returns an int from 0 to cells.size(). But, we want to skip the 0 case, so we add + 1 to the result. But, then we run into the out of bounds potential issue, so we add - 1 to cells.size().

This code is actually requesting a random int from 0 to size() - 1, then adding 1 to the result, so we get random int from 1 to size(), which enables us to skip the first column of cells that we do not want to click.

With Selenium - how can I select one element per row randomly?

Answers (2)

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