mozilla-central/js/src/jit-test/tests/errors/test-error-capturestacktrace-telemetry.js

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// Test the telemetry added in Bug 1970930
assertEq(getUseCounterResults().ErrorCaptureStackTrace, 0);
assertEq(getUseCounterResults().ErrorCaptureStackTraceCtor, 0);
assertEq(getUseCounterResults().ErrorCaptureStackTraceUncallableCtor, 0);
Error.captureStackTrace({});
assertEq(getUseCounterResults().ErrorCaptureStackTrace, 1);
assertEq(getUseCounterResults().ErrorCaptureStackTraceCtor, 0);
assertEq(getUseCounterResults().ErrorCaptureStackTraceUncallableCtor, 0);
function MyError() {
Error.captureStackTrace(this, MyError);
}
let myError = new MyError();
assertEq(getUseCounterResults().ErrorCaptureStackTrace, 2);
assertEq(getUseCounterResults().ErrorCaptureStackTraceCtor, 1);
assertEq(getUseCounterResults().ErrorCaptureStackTraceUncallableCtor, 0);
Error.captureStackTrace({}, false);
assertEq(getUseCounterResults().ErrorCaptureStackTrace, 3);
assertEq(getUseCounterResults().ErrorCaptureStackTraceCtor, 2);
assertEq(getUseCounterResults().ErrorCaptureStackTraceUncallableCtor, 1);