visibility_of_all implies it only returns elements if all visible (#2052)

* visibility_of_all implies

 it only returns elements if all elements are visible. This is not what the function does.
visibility_of_any in my opinion correctly conveys the usage of this expected condition.

* Fix visibility_of_all_elements_located test

 to use to visibility_of_any_elements_located

Author: Mobrockers

py/selenium/webdriver/support/expected_conditions.py

@@ -102,7 +102,7 @@ def __init__(self, locator):
     def __call__(self, driver):
         return _find_elements(driver, self.locator)
 
-class visibility_of_all_elements_located(object):
+class visibility_of_any_elements_located(object):
     """ An expectation for checking that there is at least one element visible
     on a web page.
     locator is used to find the element

py/test/selenium/webdriver/common/webdriverwait_tests.py

@@ -84,13 +84,13 @@ def testShouldWaitUntilAtLeastOneVisibleElementsIsFoundWhenSearchingForMany(self
         add_visible.click()
         add_hidden.click()
 
-        elements = WebDriverWait(self.driver, 2).until(EC.visibility_of_all_elements_located((By.CLASS_NAME, "redbox")))
+        elements = WebDriverWait(self.driver, 2).until(EC.visibility_of_any_elements_located((By.CLASS_NAME, "redbox")))
         self.assertTrue(len(elements) == 2)
 
     def testShouldFailToFindVisibleElementsWhenExplicitWaiting(self):
         self._loadPage("hidden_partially")
         with self.assertRaises(TimeoutException):
-            elements = WebDriverWait(self.driver, 0.7).until(EC.visibility_of_all_elements_located((By.CLASS_NAME, "redbox")))
+            elements = WebDriverWait(self.driver, 0.7).until(EC.visibility_of_any_elements_located((By.CLASS_NAME, "redbox")))
 
     def testShouldWaitOnlyAsLongAsTimeoutSpecifiedWhenImplicitWaitsAreSet(self):
         self._loadPage("dynamic")