implicit check for uniqueness of locators

[tomg246]

I would like to have all locators checked for uniqueness impicitly. An exception are locators, that are used to create UiElementLists. A property to enable/disable this seems reasonable

[martingrossmann]

Testerra already supports the element.unique() method to define that a UiElement should be unique. Otherwise an assertion error occures on the next UiElement action. Of course, this is not usefull if you have a huge number of UiElements and want to be sure of uniquness of all elements.

We could introduce a strict mode for all checks which is handled in AbstractWebdriverCore.findWebElement(Consumer) in l.219.

A property could be tt.element.find.mode=selenium|strict

• selenium (default) means that in case of non-unique locator the first appearance is used like Selenium does.
• strict means the same like element.unique(), but for all UiElements (global)