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70beef97bd
Adds `v8.cachedDataVersionTag()`, which returns an integer representing the version tag for `cachedData` for the current V8 version & flags. PR-URL: https://github.com/nodejs/node/pull/11515 Reviewed-By: Anna Henningsen <anna@addaleax.net> Reviewed-By: Ben Noordhuis <info@bnoordhuis.nl>
20 lines
684 B
JavaScript
20 lines
684 B
JavaScript
'use strict';
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require('../common');
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const assert = require('assert');
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const v8 = require('v8');
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const versionTag1 = v8.cachedDataVersionTag();
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assert.strictEqual(typeof versionTag1, 'number');
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assert.strictEqual(v8.cachedDataVersionTag(), versionTag1);
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// The value of cachedDataVersionTag is derived from the command line flags and
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// detected CPU features. Test that the value does indeed update when flags
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// are toggled.
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v8.setFlagsFromString('--allow_natives_syntax');
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const versionTag2 = v8.cachedDataVersionTag();
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assert.strictEqual(typeof versionTag2, 'number');
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assert.strictEqual(v8.cachedDataVersionTag(), versionTag2);
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assert.notStrictEqual(versionTag1, versionTag2);
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