mirror of https://github.com/nodejs/node.git
29 lines
949 B
JavaScript
29 lines
949 B
JavaScript
'use strict';
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require('../common');
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const assert = require('assert');
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const zlib = require('zlib');
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assert.strictEqual(zlib.constants.Z_OK, 0,
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[
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'Expected Z_OK to be 0;',
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`got ${zlib.constants.Z_OK}`,
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].join(' '));
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assert.throws(() => { zlib.constants.Z_OK = 1; },
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TypeError, 'zlib.constants.Z_OK should be immutable');
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assert.strictEqual(zlib.codes.Z_OK, 0,
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`Expected Z_OK to be 0; got ${zlib.codes.Z_OK}`);
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assert.throws(() => { zlib.codes.Z_OK = 1; },
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TypeError, 'zlib.codes.Z_OK should be immutable');
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assert.throws(() => { zlib.codes = { Z_OK: 1 }; },
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TypeError, 'zlib.codes should be immutable');
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assert.ok(Object.isFrozen(zlib.codes),
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[
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'Expected zlib.codes to be frozen, but Object.isFrozen',
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`returned ${Object.isFrozen(zlib.codes)}`,
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].join(' '));
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