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/* eslint-disable strict */
require('../common');
const assert = require('assert');
const zlib = require('zlib');
assert.strictEqual(zlib.constants.Z_OK, 0,
[
'Expected Z_OK to be 0;',
`got ${zlib.constants.Z_OK}`
].join(' '));
zlib.constants.Z_OK = 1;
assert.strictEqual(zlib.constants.Z_OK, 0,
[
'Z_OK should be immutable.',
`Expected to get 0, got ${zlib.constants.Z_OK}`
].join(' '));
assert.strictEqual(zlib.codes.Z_OK, 0,
`Expected Z_OK to be 0; got ${zlib.codes.Z_OK}`);
zlib.codes.Z_OK = 1;
assert.strictEqual(zlib.codes.Z_OK, 0,
[
'Z_OK should be immutable.',
`Expected to get 0, got ${zlib.codes.Z_OK}`
].join(' '));
zlib.codes = { Z_OK: 1 };
assert.strictEqual(zlib.codes.Z_OK, 0,
[
'Z_OK should be immutable.',
`Expected to get 0, got ${zlib.codes.Z_OK}`
].join(' '));
assert.ok(Object.isFrozen(zlib.codes),
[
'Expected zlib.codes to be frozen, but Object.isFrozen',
`returned ${Object.isFrozen(zlib.codes)}`
].join(' '));
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