rules-unit-testing v2 for Angular Jasmine

[weilinzung]

After updated to v2 of @firebase/rules-unit-testing which need to use file system to read the rules json, but browser side doesn’t support File system with jasmine and karma . If it is the js sdk, then not sure why need to use nodes lib. Can anyone explain and any other workarounds?

testEnv = await initializeTestEnvironment({
database: {rules: readFileSync('database.rules.json', 'utf8')},
});