AppAndFlow/react-native-safe-area-context

Jest mock "TypeError: Cannot read properties of undefined (reading 'top')"

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#551 opened on Nov 12, 2024

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Description

When upgrading from 4.13.0 to 4.13.1, start facing a TypeError due to a recent mock update https://github.com/th3rdwave/react-native-safe-area-context/pull/449

Following the guide, I included the react-native-safe-area-context to my transformIgnorePatterns

transformIgnorePatterns: [
    "node_modules/(?!react-|@react-native-community|react-native-safe-area-context|victory|rn-placeholder|redux-persist|@react-navigation|@sentry/react-native|@react-native|mixpanel-react-native|expo(nent)?|@expo(nent)?/.*|@expo-google-fonts/.*|react-navigation|@react-navigation/.*|@unimodules/.*|unimodules|sentry-expo|native-base|react-native-svg|@notifee|stream-chat-expo|@rneui/base|@datadog/mobile-react-native/jest/mock).+\\.js$",
  ],

 TypeError: Cannot read properties of undefined (reading 'top')

      23 |   }
      24 |   const Ui = ui as ReactElement<unknown>;
    > 25 |   render(Ui, { wrapper });

Contributor guide

Research direction
Examine the changes in pull request #449 that introduced the mock update. Look at how the mock for react native safe area context is implemented in Jest and ensure it returns the correct values for the insets object. If using transformIgnorePatterns, verify that the library is being transformed correctly. Consider mocking the native module directly or adjusting the mock to provide the required properties.
Tech stack
typescriptreact nativejest
Domain
mobile
Issue type
Bug
DifficultyEstimated implementation difficulty for a new contributor, from 1 for very small changes to 5 for expert-level work.
2
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.
Active
ClarityHow clearly the issue explains the expected change, acceptance criteria, and next step.
Clear
Prerequisites
JestReact Native
Newbie friendlinessA 1-100 score estimating how approachable this issue is for first-time contributors.
70