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/* eslint-disable strict */
var common = require('../common');
var assert = require('assert');
var zlib = require('zlib');
assert.equal(zlib.Z_OK, 0, 'Z_OK should be 0');
zlib.Z_OK = 1;
assert.equal(zlib.Z_OK, 0, 'Z_OK should be 0');
assert.equal(zlib.codes.Z_OK, 0, 'Z_OK should be 0');
zlib.codes.Z_OK = 1;
assert.equal(zlib.codes.Z_OK, 0, 'zlib.codes.Z_OK should be 0');
zlib.codes = {Z_OK: 1};
assert.equal(zlib.codes.Z_OK, 0, 'zlib.codes.Z_OK should be 0');
assert.ok(Object.isFrozen(zlib.codes), 'zlib.codes should be frozen');