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buffer: do deprecation warning outside
node_modules
In addition to `--pending-deprecation`, emit a deprecation warning for usage of the `Buffer()` constructor for call sites that are outside of `node_modules`. The goal of this is to better target developers, rather than burdening users with an omnipresent and quickly ignored warning. This implements the result of a TSC meeting discussion from March 22, 2018. PR-URL: #19524 Refs: #19079 (comment) Reviewed-By: Rich Trott <[email protected]> Reviewed-By: Rod Vagg <[email protected]> Reviewed-By: Michaël Zasso <[email protected]> Reviewed-By: Matteo Collina <[email protected]> Reviewed-By: James M Snell <[email protected]> Reviewed-By: Michael Dawson <[email protected]> Reviewed-By: Gibson Fahnestock <[email protected]> Reviewed-By: Colin Ihrig <[email protected]> Reviewed-By: Evan Lucas <[email protected]> Reviewed-By: Myles Borins <[email protected]>
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35 changes: 35 additions & 0 deletions
35
test/parallel/test-buffer-constructor-node-modules-paths.js
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,35 @@ | ||
| 'use strict'; | ||
|
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| const child_process = require('child_process'); | ||
| const assert = require('assert'); | ||
| const common = require('../common'); | ||
|
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| if (process.env.NODE_PENDING_DEPRECATION) | ||
| common.skip('test does not work when NODE_PENDING_DEPRECATION is set'); | ||
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| function test(main, callSite, expected) { | ||
| const { stderr } = child_process.spawnSync(process.execPath, ['-p', ` | ||
| process.mainModule = { filename: ${JSON.stringify(main)} }; | ||
| vm.runInNewContext('new Buffer(10)', { Buffer }, { | ||
| filename: ${JSON.stringify(callSite)} | ||
| });`], { encoding: 'utf8' }); | ||
| if (expected) | ||
| assert(stderr.includes('[DEP0005] DeprecationWarning'), stderr); | ||
| else | ||
| assert.strictEqual(stderr.trim(), ''); | ||
| } | ||
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| test('/a/node_modules/b.js', '/a/node_modules/x.js', true); | ||
| test('/a/node_modules/b.js', '/a/node_modules/foo/node_modules/x.js', false); | ||
| test('/a/node_modules/foo/node_modules/b.js', '/a/node_modules/x.js', false); | ||
| test('/node_modules/foo/b.js', '/node_modules/foo/node_modules/x.js', false); | ||
| test('/a.js', '/b.js', true); | ||
| test('/a.js', '/node_modules/b.js', false); | ||
| test('c:\\a\\node_modules\\b.js', 'c:\\a\\node_modules\\x.js', true); | ||
| test('c:\\a\\node_modules\\b.js', | ||
| 'c:\\a\\node_modules\\foo\\node_modules\\x.js', false); | ||
| test('c:\\node_modules\\foo\\b.js', | ||
| 'c:\\node_modules\\foo\\node_modules\\x.js', false); | ||
| test('c:\\a.js', 'c:\\b.js', true); | ||
| test('c:\\a.js', 'c:\\node_modules\\b.js', false); |
29 changes: 29 additions & 0 deletions
29
test/parallel/test-buffer-constructor-outside-node-modules.js
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,29 @@ | ||
| // Flags: --no-warnings | ||
| 'use strict'; | ||
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| const vm = require('vm'); | ||
| const assert = require('assert'); | ||
| const common = require('../common'); | ||
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| if (new Error().stack.includes('node_modules')) | ||
| common.skip('test does not work when inside `node_modules` directory'); | ||
| if (process.env.NODE_PENDING_DEPRECATION) | ||
| common.skip('test does not work when NODE_PENDING_DEPRECATION is set'); | ||
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| const bufferWarning = 'Buffer() is deprecated due to security and usability ' + | ||
| 'issues. Please use the Buffer.alloc(), ' + | ||
| 'Buffer.allocUnsafe(), or Buffer.from() methods instead.'; | ||
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| process.addListener('warning', common.mustCall((warning) => { | ||
| assert(warning.stack.includes('this_should_emit_a_warning'), warning.stack); | ||
| })); | ||
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| vm.runInNewContext('new Buffer(10)', { Buffer }, { | ||
| filename: '/a/node_modules/b' | ||
| }); | ||
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| common.expectWarning('DeprecationWarning', bufferWarning, 'DEP0005'); | ||
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| vm.runInNewContext('new Buffer(10)', { Buffer }, { | ||
| filename: '/this_should_emit_a_warning' | ||
| }); |