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

42 lines
992 B
JavaScript

'use strict';
const common = require('../common');
const dc = require('diagnostics_channel');
const assert = require('assert');
const channel = dc.tracingChannel('test');
const expectedResult = { foo: 'bar' };
const input = { foo: 'bar' };
const thisArg = { baz: 'buz' };
function check(found) {
assert.deepStrictEqual(found, input);
}
function checkAsync(found) {
check(found);
assert.strictEqual(found.error, undefined);
assert.deepStrictEqual(found.result, expectedResult);
}
const handlers = {
start: common.mustCall(check),
end: common.mustCall(check),
asyncStart: common.mustCall(checkAsync),
asyncEnd: common.mustCall(checkAsync),
error: common.mustNotCall()
};
channel.subscribe(handlers);
channel.tracePromise(function(value) {
assert.deepStrictEqual(this, thisArg);
return Promise.resolve(value);
}, input, thisArg, expectedResult).then(
common.mustCall((value) => {
assert.deepStrictEqual(value, expectedResult);
}),
common.mustNotCall()
);