How to check if element is invisible in Ruby Selenium client

How to check if element is invisible in Ruby Selenium client? In Java or C# answer is easy. There is a mechanism called ExpectedCondition, which has got ready for use method: ExpectedConditions.invisibilityOfElementLocated. Example:

driverWait.until(ExpectedConditions.invisibilityOfElementLocated(element));

Unfortunatelly, Ruby client hasn’t got anything like this. Quick workaround – try to find element. When element is not displayed, catch exception and return false:

def check_if_not_exist(locator)
  begin
    wait = Selenium::WebDriver::Wait.new :timeout => 10
    wait.until { @driver.find_element(:name, 'elementName').displayed? }
  rescue
    false
  end
end

Not very elegant and quick, but works.

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