const bkeys = Object.keys(binding);
for (var bk = 0; bk < bkeys.length; bk++) {
var bkey = bkeys[bk];
- if (bkey.match(/^Z/)) exports[bkey] = binding[bkey];
+ if (bkey.match(/^Z/)) {
+ Object.defineProperty(exports, bkey, {
+ enumerable: true, value: binding[bkey], writable: false
+ });
+ }
}
// translation table for return codes.
-exports.codes = {
+const codes = {
Z_OK: binding.Z_OK,
Z_STREAM_END: binding.Z_STREAM_END,
Z_NEED_DICT: binding.Z_NEED_DICT,
Z_VERSION_ERROR: binding.Z_VERSION_ERROR
};
-const ckeys = Object.keys(exports.codes);
+const ckeys = Object.keys(codes);
for (var ck = 0; ck < ckeys.length; ck++) {
var ckey = ckeys[ck];
- exports.codes[exports.codes[ckey]] = ckey;
+ codes[codes[ckey]] = ckey;
}
+Object.defineProperty(exports, 'codes', {
+ enumerable: true, value: Object.freeze(codes), writable: false
+});
+
exports.Deflate = Deflate;
exports.Inflate = Inflate;
exports.Gzip = Gzip;
--- /dev/null
+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');