Notes from demo "Selenide in less than 15 minutes (in Python)" - version based on Selenium explicit waiters and expected conditions demoed in Minsk on 01.08.2015 ]

selenide_in_less_than_15_minutes_demo.py

from selenium import webdriver
from selenium.common.exceptions import NoSuchElementException, StaleElementReferenceException
from selenium.webdriver.common.keys import Keys
from selenium.webdriver.support.wait import WebDriverWait

browser = webdriver.Firefox()


class WaitingElement(object):
    def __init__(self, css_selector):
        self._locator = css_selector

    def _finder(self):
        return browser.find_element_by_css_selector(self._locator)

    def __getattr__(self, item):
        self.assure(visible)
        return getattr(self._finder(), item)

    def assure(self, condition, *args):
        WebDriverWait(browser, 4).until(condition(self._finder, *args))
        return self


def s(css_selector):
    return WaitingElement(css_selector)

class text(object):
    def __init__(self, finder, text_):
        self.finder = finder
        self.text = text_

    def __call__(self, driver):
        try:
            element_text = self.finder().text
            return self.text in element_text
        except StaleElementReferenceException:
            return False


class visible(object):
    def __init__(self, finder):
        self.finder = finder

    def __call__(self, driver):
        try:
            return self.finder().is_displayed()
        except StaleElementReferenceException:
            return False

browser.get("http://google.com/ncr")
s("[name='q']").send_keys("selenium", Keys.ENTER)
s(".srg .g:nth-child(1)").assure(text, "Selenium automates browsers")  # explicitly waiting of Selenide style (via assure instead of shouldBe)

browser.get("http://google.com/ncr")
s("[name='q']").send_keys("selenium", Keys.ENTER)
s(".srg .g:nth-child(1)").find_element_by_css_selector(".r a").click() # implicitly waiting for visibility of element

browser.quit()