Check whether element is present - ruby

Question

Is there anyway to check whether an element is present in Selenium web driver? I try to use this code:
if #driver.find_element(:link, "Save").displayed? == true
but it will break in exception, which is not what I expected because I still want the script to continue running.

Answer 1

I'm not Ruby expert and can make some syntax errors but you can get general idea:
if #driver.find_elements(:link, "Save").size() > 0
This code doesn't throw NoSuchElementException
But this method will "hang" for a while if you have implicitlyWait more than zero and there is no elements on the page.
The second issue - if element exists on the page but not displayed you'll get true.
To workaround try to create method:
def is_element_present(how, what)
#driver.manage.timeouts.implicit_wait = 0
result = #driver.find_elements(how, what).size() > 0
if result
result = #driver.find_element(how, what).displayed?
end
#driver.manage.timeouts.implicit_wait = 30
return result
end

Answer 2

#driver.find_element throws an exception called NoSuchElementError.
So you can write your own method which uses try catch block and return true when there is no exception and false when there is an exception.

Answer 3

If it's expected that the element should be on the page no matter what: use a selenium wait object with element.displayed?, rather than using begin/rescue:
wait = Selenium::WebDriver::Wait.new(:timeout => 15)
element = $driver.find_element(id: 'foo')
wait.until { element.displayed? } ## Or `.enabled?` etc.
This is useful in instances where parts of the page take longer to properly render than others.

Answer 4

I am using selenium-webdriver version 3.14.0 released earlier this month. I was trying to put a check on #web_driver_instance.find_element(:xpath, "//div[contains(text(), 'text_under_search')]").displayed? using:
element_exists = #wait.until { #web_driver_instance.find_element(:xpath, "//div[contains(text(), 'text_under_search')]").displayed? }
unless element_exists
#do something if the element does not exist
end
Above failed with NoSuchElementError exception so i tried using below:
begin
#wait.until { #web_driver_instance.find_element(:xpath, "//div[contains(text(), 'text_under_search')]").displayed? }
rescue NoSuchElementError
#do something if the element does not exist
end
This also did not work for me and failed again with NoSuchElementError exception.
Since text presence i was checking was likely to be unique on the page, tried below and this worked for me:
unless /text_under_search_without_quotes/.match?(#web_driver_instance.page_source)
#do something if the text does not exist
end

Answer 5

Find Element
Solution #1
expect(is_visible?(page.your_element)).to be(false)
[or]
expect(is_visible?(#driver.find_element(:css => 'locator_value'))).to be(false)
[or]
expect(is_visible?(#driver.first(:css => 'locator_value'))).to be(true)
=> Generic ruby method
def is_visible?(element)
begin
element.displayed?
return true
rescue => e
p e.message
return false
end
end
Solution #2
expect(is_visible?(".locator_value")).to be(false) # default css locator
[or]
expect(is_visible?("locator_value", 'xpath')).to be(true)
[or]
expect(is_visible?("locator_value", 'css')).to be(false)
[or]
expect(is_visible?("locator_value", 'id')).to be(false)
=> Generic ruby method
def is_visible?(value, locator = 'css')
begin
#driver.first(eval(":#{locator}") => value).displayed?
return true
rescue => e
p e.message
return false
end
end
Find Elements (list of elements)
Solution #1
=> Variable declared in the page class
proceed_until(#driver.find_elements(:css => 'locator_value').size == 0)
[or]
proceed_until(#driver.all(:css => 'locator_value').size == 0)
=> Generic ruby method
def proceed_until(action)
init = 0
until action
sleep 1
init += 1
raise ArgumentError.new("Assertion not matching") if init == 9
end
end