Issues with NO_TELEMETRY and code_coverage in JEST

[ch-sap]

Hello,

we have a CAP/Fiori Elements project that uses these packages for telemetry:
"@cap-js/telemetry": "^1.1.0",
"@opentelemetry/exporter-metrics-otlp-grpc": "^0.55.0",
"@opentelemetry/exporter-trace-otlp-grpc": "^0.55.0",

For code coverage measurement, we are using "jest": "^29.7.0".

As the log gets very long, we wanted to switch off telemetry during the code coverage measurement. The npm script looks like this:
"code-coverage": "NO_TELEMETRY=true node --experimental-vm-modules ./node_modules/.bin/jest --coverage",

Unfortunately, we got a flickering in our unit tests (red/green) where the cds log is read to check audit logging. It seemed as if an asynchronous request was not finished, but required. When we removed NO_TELEMETRY again, everything works fine.

Please, check. It took me quite some time to find where the issue comes from.

Best regards,
Christine

Some more information:

The test:
it('should log an audit log message when a visitor is read', async function () {
// Read the updated poetry slam in draft mode
const visitors = await GET(/odata/v4/visitorservice/Visitors?$top=1);
expect(visitors.data.value.length).to.greaterThan(0);
const auditLog = filterLog(cdsTestLog);
expect(auditLog.length).to.eql(1);
expect(auditLog[0].type).to.eql('SensitiveDataRead');
expect(auditLog[0].attributes[0]).to.eql('email');
});

The filterLog method:
function filterLog(log) {
// Filter the audit log entries
const auditLogs = log.output
.split(/^[/m)
.filter((log) => log.startsWith('audit-log'));
// Extract the type and details
const auditLogsInfo = auditLogs.map((log) =>
log.replaceAll(/\s/g, '').match(/-(\w+):.attributes:[(.)]/)
);
// Keep the type and extract the affected attributes
const auditLogsTypeAndAttributes = auditLogsInfo.map((info) => {
return {
type: info[1],
attributes: [...info[2].matchAll(/name:'(\w+)'/g)].map((attr) => attr[1])
};
});

return auditLogsTypeAndAttributes;
}