From 6bf0a5cb5034a7e684dcc3500e841785237ce2dd Mon Sep 17 00:00:00 2001 From: Daniel Baumann Date: Sun, 7 Apr 2024 19:32:43 +0200 Subject: Adding upstream version 1:115.7.0. Signed-off-by: Daniel Baumann --- .../marionette/client/docs/advanced/actions.rst | 21 ++++++ testing/marionette/client/docs/advanced/debug.rst | 35 +++++++++ .../client/docs/advanced/findelement.rst | 87 ++++++++++++++++++++++ .../marionette/client/docs/advanced/landing.rst | 13 ++++ testing/marionette/client/docs/advanced/stale.rst | 76 +++++++++++++++++++ 5 files changed, 232 insertions(+) create mode 100644 testing/marionette/client/docs/advanced/actions.rst create mode 100644 testing/marionette/client/docs/advanced/debug.rst create mode 100644 testing/marionette/client/docs/advanced/findelement.rst create mode 100644 testing/marionette/client/docs/advanced/landing.rst create mode 100644 testing/marionette/client/docs/advanced/stale.rst (limited to 'testing/marionette/client/docs/advanced') diff --git a/testing/marionette/client/docs/advanced/actions.rst b/testing/marionette/client/docs/advanced/actions.rst new file mode 100644 index 0000000000..c767bdecdc --- /dev/null +++ b/testing/marionette/client/docs/advanced/actions.rst @@ -0,0 +1,21 @@ +Actions +======= + +.. py:currentmodule:: marionette_driver.marionette + +Action Sequences +---------------- + +:class:`Actions` are designed as a way to simulate user input like a keyboard +or a pointer device as closely as possible. For multiple interactions an +action sequence can be used:: + + element = marionette.find_element("id", "input") + element.click() + + key_chain = self.marionette.actions.sequence("key", "keyboard1") + key_chain.send_keys("fooba").pause(100).key_down("r").perform() + +This will simulate entering "fooba" into the input field, waiting for 100ms, +and pressing the key "r". The pause is optional in this case, but can be useful +for simulating delays typical to a users behaviour. diff --git a/testing/marionette/client/docs/advanced/debug.rst b/testing/marionette/client/docs/advanced/debug.rst new file mode 100644 index 0000000000..895009ef7f --- /dev/null +++ b/testing/marionette/client/docs/advanced/debug.rst @@ -0,0 +1,35 @@ +Debugging +========= + +.. py:currentmodule:: marionette_driver.marionette + +Sometimes when working with Marionette you'll run into unexpected behaviour and +need to do some debugging. This page outlines some of the Marionette methods +that can be useful to you. + +Please note that the best tools for debugging are the `ones that ship with +Gecko`_. This page doesn't describe how to use those with Marionette. Also see +a related topic about `using the debugger with Marionette`_ on MDN. + +.. _ones that ship with Gecko: https://developer.mozilla.org/en-US/docs/Tools +.. _using the debugger with Marionette: https://developer.mozilla.org/en-US/docs/Marionette/Debugging + +Seeing What's on the Page +~~~~~~~~~~~~~~~~~~~~~~~~~ + +Sometimes it's difficult to tell what is actually on the page that is being +manipulated. Either because it happens too fast, the window isn't big enough or +you are manipulating a remote server! There are two methods that can help you +out. The first is :func:`~Marionette.screenshot`:: + + marionette.screenshot() # takes screenshot of entire frame + elem = marionette.find_element(By.ID, 'some-div') + marionette.screenshot(elem) # takes a screenshot of only the given element + +Sometimes you just want to see the DOM layout. You can do this with the +:attr:`~Marionette.page_source` property. Note that the page source depends on +the context you are in:: + + print(marionette.page_source) + marionette.set_context('chrome') + print(marionette.page_source) diff --git a/testing/marionette/client/docs/advanced/findelement.rst b/testing/marionette/client/docs/advanced/findelement.rst new file mode 100644 index 0000000000..6f61fa5e25 --- /dev/null +++ b/testing/marionette/client/docs/advanced/findelement.rst @@ -0,0 +1,87 @@ +Finding Elements +================ +.. py:currentmodule:: marionette_driver.marionette + +One of the most common and yet often most difficult tasks in Marionette is +finding a DOM element on a webpage or in the chrome UI. Marionette provides +several different search strategies to use when finding elements. All search +strategies work with both :func:`~Marionette.find_element` and +:func:`~Marionette.find_elements`, though some strategies are not implemented +in chrome scope. + +In the event that more than one element is matched by the query, +:func:`~Marionette.find_element` will only return the first element found. In +the event that no elements are matched by the query, +:func:`~Marionette.find_element` will raise `NoSuchElementException` while +:func:`~Marionette.find_elements` will return an empty list. + +Search Strategies +----------------- + +Search strategies are defined in the :class:`By` class:: + + from marionette_driver import By + print(By.ID) + +The strategies are: + +* `id` - The easiest way to find an element is to refer to its id directly:: + + container = client.find_element(By.ID, 'container') + +* `class name` - To find elements belonging to a certain class, use `class name`:: + + buttons = client.find_elements(By.CLASS_NAME, 'button') + +* `css selector` - It's also possible to find elements using a `css selector`_:: + + container_buttons = client.find_elements(By.CSS_SELECTOR, '#container .buttons') + +* `name` - Find elements by their name attribute (not implemented in chrome + scope):: + + form = client.find_element(By.NAME, 'signup') + +* `tag name` - To find all the elements with a given tag, use `tag name`:: + + paragraphs = client.find_elements(By.TAG_NAME, 'p') + +* `link text` - A convenience strategy for finding link elements by their + innerHTML (not implemented in chrome scope):: + + link = client.find_element(By.LINK_TEXT, 'Click me!') + +* `partial link text` - Same as `link text` except substrings of the innerHTML + are matched (not implemented in chrome scope):: + + link = client.find_element(By.PARTIAL_LINK_TEXT, 'Clic') + +* `xpath` - Find elements using an xpath_ query:: + + elem = client.find_element(By.XPATH, './/*[@id="foobar"') + +.. _css selector: https://developer.mozilla.org/en-US/docs/Web/Guide/CSS/Getting_Started/Selectors +.. _xpath: https://developer.mozilla.org/en-US/docs/Web/XPath + + + +Chaining Searches +----------------- + +In addition to the methods on the Marionette object, HTMLElement objects also +provide :func:`~HTMLElement.find_element` and :func:`~HTMLElement.find_elements` +methods. The difference is that only child nodes of the element will be searched. +Consider the following html snippet:: + +
+ +
+ + +Doing the following will work:: + + client.find_element(By.ID, 'container').find_element(By.ID, 'main') + +But this will raise a `NoSuchElementException`:: + + client.find_element(By.ID, 'container').find_element(By.ID, 'footer') diff --git a/testing/marionette/client/docs/advanced/landing.rst b/testing/marionette/client/docs/advanced/landing.rst new file mode 100644 index 0000000000..0a44de63d7 --- /dev/null +++ b/testing/marionette/client/docs/advanced/landing.rst @@ -0,0 +1,13 @@ +Advanced Topics +=============== + +Here are a collection of articles explaining some of the more complicated +aspects of Marionette. + +.. toctree:: + :maxdepth: 1 + + findelement + stale + actions + debug diff --git a/testing/marionette/client/docs/advanced/stale.rst b/testing/marionette/client/docs/advanced/stale.rst new file mode 100644 index 0000000000..885083993c --- /dev/null +++ b/testing/marionette/client/docs/advanced/stale.rst @@ -0,0 +1,76 @@ +Dealing with Stale Elements +=========================== +.. py:currentmodule:: marionette_driver.marionette + +Marionette does not keep a live representation of the DOM saved. All it can do +is send commands to the Marionette server which queries the DOM on the client's +behalf. References to elements are also not passed from server to client. A +unique id is generated for each element that gets referenced and a mapping of +id to element object is stored on the server. When commands such as +:func:`~HTMLElement.click` are run, the client sends the element's id along +with the command. The server looks up the proper DOM element in its reference +table and executes the command on it. + +In practice this means that the DOM can change state and Marionette will never +know until it sends another query. For example, look at the following HTML:: + + + + + + +
+
+ + + +Care needs to be taken as the DOM is being modified after the page has loaded. +The following code has a race condition:: + + button = client.find_element('id', 'button') + button.click() + assert len(client.find_elements('css selector', '#container div')) > 0 + + +Explicit Waiting and Expected Conditions +---------------------------------------- +.. py:currentmodule:: marionette_driver + +To avoid the above scenario, manual synchronisation is needed. Waits are used +to pause program execution until a given condition is true. This is a useful +technique to employ when documents load new content or change after +``Document.readyState``'s value changes to "complete". + +The :class:`Wait` helper class provided by Marionette avoids some of the +caveats of ``time.sleep(n)``. It will return immediately once the provided +condition evaluates to true. + +To avoid the race condition in the above example, one could do:: + + from marionette_driver import Wait + + button = client.find_element('id', 'button') + button.click() + + def find_divs(): + return client.find_elements('css selector', '#container div') + + divs = Wait(client).until(find_divs) + assert len(divs) > 0 + +This avoids the race condition. Because finding elements is a common condition +to wait for, it is built in to Marionette. Instead of the above, you could +write:: + + from marionette_driver import Wait + + button = client.find_element('id', 'button') + button.click() + assert len(Wait(client).until(expected.elements_present('css selector', '#container div'))) > 0 + +For a full list of built-in conditions, see :mod:`~marionette_driver.expected`. -- cgit v1.2.3