Microsoft/react-native-windows

Fabric e2etests for large snapshots are broken

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#13436 opened on Jul 11, 2024

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Area: Test InfrastructureArea: TestsNew ArchitectureWorkstream: Test Coveragebughelp wanted

Description

Problem Description

Currently affecting main and 0.75

Broken Tests FlatList - Basic ScrollView - refresh Control SectionList - Scrollable

While working on the 0.75 branch these tests broke due to an Invalid string length error. I'm thinking it's because these are the only tests with 1000+ items and the toJson() function must have put a cap on what it can process but further investigation is needed. Check pages out locally and they render/work as intended

image

Steps To Reproduce

  1. Run tests on 0.75 branch
  2. Look at Pipeline (https://dev.azure.com/ms/react-native-windows/_build/results?buildId=592440&view=logs&j=20253376-38f7-5084-b900-818d1e6181d3&t=e4bc6543-c5eb-5bc9-6033-5ab4b4216285)

Expected Results

No response

CLI version

npx react-native -v

Environment

npx react-native info

Community Modules

No response

Target Platform Version

None

Target Device(s)

No response

Visual Studio Version

None

Build Configuration

None

Snack, code example, screenshot, or link to a repository

No response

Contributor guide

Tech stack
javascriptreact native
Domain
testingdesktop
Issue type
bug
DifficultyEstimated implementation difficulty for a new contributor, from 1 for very small changes to 5 for expert-level work.
3
Estimated timeA rough time range for an experienced contributor to investigate, implement, test, and prepare a pull request.
1-2 days
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.
mostly clear
Prerequisites
React Native basicse2e testing knowledge
Newbie friendlinessA 1-100 score estimating how approachable this issue is for first-time contributors.
40
Research direction
Investigate the toJson() function that handles large snapshots. Check the test files for FlatList, ScrollView, and SectionList in the e2e test suite. Look for any JSON string length limits or truncation in the snapshot serialization code. Review linked pipeline logs for more error details.