'use strict'; require('../common'); const assert = require('assert'); const v8 = require('v8'); const versionTag1 = v8.cachedDataVersionTag(); assert.strictEqual(typeof versionTag1, 'number'); assert.strictEqual(v8.cachedDataVersionTag(), versionTag1); // The value returned by v8.cachedDataVersionTag() is derived from the V8 // version, command-line flags, and detected CPU features. Test that the value // does indeed update when flags are toggled. v8.setFlagsFromString('--allow_natives_syntax'); const versionTag2 = v8.cachedDataVersionTag(); assert.strictEqual(typeof versionTag2, 'number'); assert.strictEqual(v8.cachedDataVersionTag(), versionTag2); assert.notStrictEqual(versionTag1, versionTag2);