http://yizeng.me/2014/04/08/get-text-from-hidden-elements-using-selenium-webdriver/
excerpt from this link:
As defined in WebDriver spec, Selenium WebDriver will only interact with visible elements, therefore the text of an invisible element will always be returned as an empty string.
However, in some cases, one may find it useful to get the hidden text, which can be retrieved from element's textContent, innerText or innerHTML attribute, by calling element.attribute('attributeName') or injecting JavaScript like return arguments[0].attributeName.
innerHTML will return the inner HTML of this element, which contains all HTML tags inside.
For example, innerHTML for Hello
World!
would be Hello
World!
instead of Hello World!.
textContent and innerText will only retrieve all text content of its descendants without any HTML tags.
textContent is a W3C-compliant textContent property[1], but sadly is not supported by IE[2].
innerText is not part of the W3C DOM specification and not supported by Firefox.
Here is a brief demonstration on how to get text from hidden elements using Selenium WebDriver .NET, Ruby and Python bindings.
from selenium import webdriver
DEMO_PAGE = '''data:text/html,
Demo page for how to get text from hidden elements using Selenium WebDriver.
Demo div with a hidden paragraph inside.
'''
driver = webdriver.PhantomJS()
driver.get(DEMO_PAGE)
demo_div = driver.find_element_by_id("demo-div")
print demo_div.get_attribute('innerHTML')
print driver.execute_script("return arguments[0].innerHTML", demo_div)
print demo_div.get_attribute('textContent')
print driver.execute_script("return arguments[0].textContent", demo_div)
driver.quit