node/test/parallel/test-diagnostics-channel-tr...

21 lines
480 B
JavaScript

'use strict';
const common = require('../common');
const dc = require('diagnostics_channel');
const channel = dc.tracingChannel('test');
const handlers = {
start: common.mustNotCall(),
end: common.mustNotCall(),
asyncStart: common.mustNotCall(),
asyncEnd: common.mustNotCall(),
error: common.mustNotCall()
};
// While subscribe occurs _before_ the sync call ends,
// no end event should be published.
channel.traceSync(() => {
channel.subscribe(handlers);
}, {});