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console: console.time() should not reset a timer when it exists #20442

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console: console.time() should not reset a timer when it exists #20442

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4 changes: 4 additions & 0 deletions lib/console.js
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Original file line number Diff line number Diff line change
Expand Up @@ -225,6 +225,10 @@ Console.prototype.dir = function dir(object, options) {
Console.prototype.time = function time(label = 'default') {
// Coerces everything other than Symbol to a string
label = `${label}`;
if (this._times.has(label)) {
process.emitWarning(`Label '${label}' already exists for console.time()`);
return;
}
this._times.set(label, process.hrtime());
};

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14 changes: 14 additions & 0 deletions test/parallel/test-console.js
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Expand Up @@ -138,6 +138,20 @@ console.timeEnd();
console.time(NaN);
console.timeEnd(NaN);

// make sure calling time twice without timeEnd doesn't reset the timer.
console.time('test');
const time = console._times.get('test');
setTimeout(() => {
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Can we get rid of the timeout?

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ita just to make sure we have a noticeable difference if something goes wrong, I'm tired of flakey tests from too small timeouts etc

assert.deepStrictEqual(console._times.get('test'), time);
common.expectWarning(
'Warning',
'Label \'test\' already exists for console.time()',
common.noWarnCode);
console.time('test');
console.timeEnd('test');
}, 1);


console.assert(false, '%s should', 'console.assert', 'not throw');
assert.strictEqual(errStrings[errStrings.length - 1],
'Assertion failed: console.assert should not throw\n');
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