openatx/facebook-wda

点击坐标，滑动屏幕，报错

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#87 opened on Nov 27, 2019

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 (1 comment) (0 reactions) (0 assignees)Python (1,624 stars) (257 forks)batch import
help wanted

Description

WebDriverAgentRunner-Runner[3941:238052] *** Terminating app due to uncaught exception 'NSInternalInconsistencyException', reason: 'Cannot remove an observer <NSKeyValueObservance 0x281aa3b40> for the key path "currentProcess.applicationState" from <XCUIApplicationImpl 0x28373eee0>, most likely because the value for the key "currentProcess" has changed without an appropriate KVO notification being sent. Check the KVO-compliance of the XCUIApplicationImpl class.'

Contributor guide

Tech stack
python
Domain
testing
Issue type
bug
DifficultyEstimated implementation difficulty for a new contributor, from 1 for very small changes to 5 for expert-level work.
4
Estimated timeA rough time range for an experienced contributor to investigate, implement, test, and prepare a pull request.
1-3 hours
Activity statusHow available the issue appears right now: fresh, active, stale, blocked, or waiting on maintainer input.
stale
ClarityHow clearly the issue explains the expected change, acceptance criteria, and next step.
needs investigation
Prerequisites
iOS testing basicsKVO concept
Newbie friendlinessA 1-100 score estimating how approachable this issue is for first-time contributors.
20
Research direction
Investigate the KVO observer removal error in XCUIApplicationImpl. Look at the WebDriverAgent source code for how 'currentProcess.applicationState' is observed and if there's a missing KVO notification. Check the facebook wda Python client's interaction with the agent to see if it triggers this issue. The error suggests a KVO compliance problem; reviewing recent changes to XCUIApplicationImpl class in WebDriverAgent may help identify the cause.