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"""Exceptions that may happen in all the webdriver code."""
from typing import Optional
from typing import Sequence
SUPPORT_MSG = "For documentation on this error, please visit:"
ERROR_URL = "https://www.selenium.dev/documentation/webdriver/troubleshooting/errors"
[docs]class WebDriverException(Exception):
"""Base webdriver exception."""
def __init__(
self, msg: Optional[str] = None, screen: Optional[str] = None, stacktrace: Optional[Sequence[str]] = None
) -> None:
super().__init__()
self.msg = msg
self.screen = screen
self.stacktrace = stacktrace
def __str__(self) -> str:
exception_msg = f"Message: {self.msg}\n"
if self.screen:
exception_msg += "Screenshot: available via screen\n"
if self.stacktrace:
stacktrace = "\n".join(self.stacktrace)
exception_msg += f"Stacktrace:\n{stacktrace}"
return exception_msg
[docs]class InvalidSwitchToTargetException(WebDriverException):
"""Thrown when frame or window target to be switched doesn't exist."""
[docs]class NoSuchFrameException(InvalidSwitchToTargetException):
"""Thrown when frame target to be switched doesn't exist."""
[docs]class NoSuchWindowException(InvalidSwitchToTargetException):
"""Thrown when window target to be switched doesn't exist.
To find the current set of active window handles, you can get a list
of the active window handles in the following way::
print driver.window_handles
"""
[docs]class NoSuchElementException(WebDriverException):
"""Thrown when element could not be found.
If you encounter this exception, you may want to check the following:
* Check your selector used in your find_by...
* Element may not yet be on the screen at the time of the find operation,
(webpage is still loading) see selenium.webdriver.support.wait.WebDriverWait()
for how to write a wait wrapper to wait for an element to appear.
"""
def __init__(
self, msg: Optional[str] = None, screen: Optional[str] = None, stacktrace: Optional[Sequence[str]] = None
) -> None:
with_support = f"{msg}; {SUPPORT_MSG} {ERROR_URL}#no-such-element-exception"
super().__init__(with_support, screen, stacktrace)
[docs]class NoSuchAttributeException(WebDriverException):
"""Thrown when the attribute of element could not be found.
You may want to check if the attribute exists in the particular
browser you are testing against. Some browsers may have different
property names for the same property. (IE8's .innerText vs. Firefox
.textContent)
"""
[docs]class NoSuchShadowRootException(WebDriverException):
"""Thrown when trying to access the shadow root of an element when it does
not have a shadow root attached."""
[docs]class StaleElementReferenceException(WebDriverException):
"""Thrown when a reference to an element is now "stale".
Stale means the element no longer appears on the DOM of the page.
Possible causes of StaleElementReferenceException include, but not limited to:
* You are no longer on the same page, or the page may have refreshed since the element
was located.
* The element may have been removed and re-added to the screen, since it was located.
Such as an element being relocated.
This can happen typically with a javascript framework when values are updated and the
node is rebuilt.
* Element may have been inside an iframe or another context which was refreshed.
"""
def __init__(
self, msg: Optional[str] = None, screen: Optional[str] = None, stacktrace: Optional[Sequence[str]] = None
) -> None:
with_support = f"{msg}; {SUPPORT_MSG} {ERROR_URL}#stale-element-reference-exception"
super().__init__(with_support, screen, stacktrace)
[docs]class InvalidElementStateException(WebDriverException):
"""Thrown when a command could not be completed because the element is in
an invalid state.
This can be caused by attempting to clear an element that isn't both
editable and resettable.
"""
[docs]class UnexpectedAlertPresentException(WebDriverException):
"""Thrown when an unexpected alert has appeared.
Usually raised when an unexpected modal is blocking the webdriver
from executing commands.
"""
def __init__(
self,
msg: Optional[str] = None,
screen: Optional[str] = None,
stacktrace: Optional[Sequence[str]] = None,
alert_text: Optional[str] = None,
) -> None:
super().__init__(msg, screen, stacktrace)
self.alert_text = alert_text
def __str__(self) -> str:
return f"Alert Text: {self.alert_text}\n{super().__str__()}"
[docs]class NoAlertPresentException(WebDriverException):
"""Thrown when switching to no presented alert.
This can be caused by calling an operation on the Alert() class when
an alert is not yet on the screen.
"""
[docs]class ElementNotVisibleException(InvalidElementStateException):
"""Thrown when an element is present on the DOM, but it is not visible, and
so is not able to be interacted with.
Most commonly encountered when trying to click or read text of an
element that is hidden from view.
"""
[docs]class ElementNotInteractableException(InvalidElementStateException):
"""Thrown when an element is present in the DOM but interactions with that
element will hit another element due to paint order."""
[docs]class ElementNotSelectableException(InvalidElementStateException):
"""Thrown when trying to select an unselectable element.
For example, selecting a 'script' element.
"""
[docs]class InvalidCookieDomainException(WebDriverException):
"""Thrown when attempting to add a cookie under a different domain than the
current URL."""
[docs]class UnableToSetCookieException(WebDriverException):
"""Thrown when a driver fails to set a cookie."""
[docs]class TimeoutException(WebDriverException):
"""Thrown when a command does not complete in enough time."""
[docs]class MoveTargetOutOfBoundsException(WebDriverException):
"""Thrown when the target provided to the `ActionsChains` move() method is
invalid, i.e. out of document."""
[docs]class UnexpectedTagNameException(WebDriverException):
"""Thrown when a support class did not get an expected web element."""
[docs]class InvalidSelectorException(WebDriverException):
"""Thrown when the selector which is used to find an element does not
return a WebElement.
Currently this only happens when the selector is an xpath expression
and it is either syntactically invalid (i.e. it is not a xpath
expression) or the expression does not select WebElements (e.g.
"count(//input)").
"""
def __init__(
self, msg: Optional[str] = None, screen: Optional[str] = None, stacktrace: Optional[Sequence[str]] = None
) -> None:
with_support = f"{msg}; {SUPPORT_MSG} {ERROR_URL}#invalid-selector-exception"
super().__init__(with_support, screen, stacktrace)
[docs]class ImeNotAvailableException(WebDriverException):
"""Thrown when IME support is not available.
This exception is thrown for every IME-related method call if IME
support is not available on the machine.
"""
[docs]class ImeActivationFailedException(WebDriverException):
"""Thrown when activating an IME engine has failed."""
[docs]class InvalidArgumentException(WebDriverException):
"""The arguments passed to a command are either invalid or malformed."""
[docs]class JavascriptException(WebDriverException):
"""An error occurred while executing JavaScript supplied by the user."""
[docs]class NoSuchCookieException(WebDriverException):
"""No cookie matching the given path name was found amongst the associated
cookies of the current browsing context's active document."""
[docs]class ScreenshotException(WebDriverException):
"""A screen capture was made impossible."""
[docs]class ElementClickInterceptedException(WebDriverException):
"""The Element Click command could not be completed because the element
receiving the events is obscuring the element that was requested to be
clicked."""
[docs]class InsecureCertificateException(WebDriverException):
"""Navigation caused the user agent to hit a certificate warning, which is
usually the result of an expired or invalid TLS certificate."""
[docs]class InvalidCoordinatesException(WebDriverException):
"""The coordinates provided to an interaction's operation are invalid."""
[docs]class InvalidSessionIdException(WebDriverException):
"""Occurs if the given session id is not in the list of active sessions,
meaning the session either does not exist or that it's not active."""
[docs]class SessionNotCreatedException(WebDriverException):
"""A new session could not be created."""
[docs]class UnknownMethodException(WebDriverException):
"""The requested command matched a known URL but did not match any methods
for that URL."""
[docs]class NoSuchDriverException(WebDriverException):
"""Raised when driver is not specified and cannot be located."""
def __init__(
self, msg: Optional[str] = None, screen: Optional[str] = None, stacktrace: Optional[Sequence[str]] = None
) -> None:
with_support = f"{msg}; {SUPPORT_MSG} {ERROR_URL}/driver_location"
super().__init__(with_support, screen, stacktrace)