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zlib: move bytesRead accessors to runtime deprecation #23308

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zlib: move bytesRead accessors to runtime deprecation #23308

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zlib: move `bytesRead` accessors to runtime deprecation
addaleax Oct 7, 2018
4a096aa
fixup! zlib: move `bytesRead` accessors to runtime deprecation
addaleax Oct 7, 2018
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5 changes: 4 additions & 1 deletion doc/api/deprecations.md
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Expand Up @@ -2056,12 +2056,15 @@ core and obsoleted by the removal of NPN (Next Protocol Negotiation) support.
### DEP0108: zlib.bytesRead
<!-- YAML
changes:
- version: REPLACEME
pr-url: https://github.com/nodejs/node/pull/23308
description: Runtime deprecation.
- version: v10.0.0
pr-url: https://github.com/nodejs/node/pull/19414
description: Documentation-only deprecation.
-->

Type: Documentation-only
Type: Runtime

Deprecated alias for [`zlib.bytesWritten`][]. This original name was chosen
because it also made sense to interpret the value as the number of bytes
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11 changes: 7 additions & 4 deletions lib/zlib.js
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Expand Up @@ -29,6 +29,7 @@ const {
} = require('internal/errors').codes;
const Transform = require('_stream_transform');
const {
deprecate,
_extend,
inherits,
types: {
Expand Down Expand Up @@ -333,12 +334,14 @@ Object.defineProperty(Zlib.prototype, '_closed', {
Object.defineProperty(Zlib.prototype, 'bytesRead', {
configurable: true,
enumerable: true,
get() {
get: deprecate(function() {
return this.bytesWritten;
},
set(value) {
}, 'zlib.bytesRead is deprecated and will change its meaning in the ' +
'future. Use zlib.bytesWritten instead.', 'DEP0108'),
set: deprecate(function(value) {
this.bytesWritten = value;
}
}, 'Setting zlib.bytesRead is deprecated. ' +
'This feature will be removed in the future.', 'DEP0108')
});

// This callback is used by `.params()` to wait until a full flush happened
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6 changes: 6 additions & 0 deletions test/parallel/test-zlib-bytes-read.js
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Expand Up @@ -21,6 +21,12 @@ function createWriter(target, buffer) {
return writer;
}

common.expectWarning(
'DeprecationWarning',
'zlib.bytesRead is deprecated and will change its meaning in the ' +
'future. Use zlib.bytesWritten instead.',
'DEP0108');

for (const method of [
['createGzip', 'createGunzip', false],
['createGzip', 'createUnzip', false],
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