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test: coverage for emitExperimentalWarning

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PR-URL: https://github.com/nodejs/node/pull/17635
Reviewed-By: Anatoli Papirovski <apapirovski@mac.com>
Reviewed-By: James M Snell <jasnell@gmail.com>
Reviewed-By: Colin Ihrig <cjihrig@gmail.com>
Reviewed-By: Luigi Pinca <luigipinca@gmail.com>
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Mithun Sasidharan 2017-12-13 22:40:31 +05:30 committed by Anatoli Papirovski
parent 3db136a74a
commit 3a53f7cc74
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test/parallel/test-util-emit-experimental-warning.js Normal file
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'use strict';
// Flags: --expose-internals
const common = require('../common');
const assert = require('assert');
const { emitExperimentalWarning } = require('internal/util');
// This test ensures that the emitExperimentalWarning in internal/util emits a
// warning when passed an unsupported feature and that it simply returns
// when passed the same feature multiple times.
process.on('warning', common.mustCall((warning) => {
assert(/is an experimental feature/.test(warning.message));
}, 2));
emitExperimentalWarning('feature1');
emitExperimentalWarning('feature1'); // should not warn
emitExperimentalWarning('feature2');