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test: improve check in test-os #14655

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test: improve check in test-os #14655

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Trott
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@Trott Trott commented Aug 7, 2017

The check for os.networkInterfaces() in test-os.js may be too
strict. It's apparently possible for a machine to be configured with
multiple IPv4 loopback interfaces. Increase specificity of filter to
check on only the object we expect.

Fixes: #14654

Checklist
  • make -j4 test (UNIX), or vcbuild test (Windows) passes
  • commit message follows commit guidelines
Affected core subsystem(s)

test os

@Trott Trott added os Issues and PRs related to the os subsystem. test Issues and PRs related to the tests. labels Aug 7, 2017
@Trott Trott changed the title test: relax check in test-os test: improve check in test-os Aug 7, 2017
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Trott commented Aug 7, 2017

@@ -116,8 +116,8 @@ const interfaces = os.networkInterfaces();
switch (platform) {
case 'linux':
{
const filter = (e) => e.address === '127.0.0.1';
const actual = interfaces.lo.filter(filter);
const fltr = (e) => e.address === '127.0.0.1' && e.netmask === '255.0.0.0';

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Not a big deal but FWIW, the fltr const name is now inconsistent with the filter used in the win32 case

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Can you leave the name as filter and just break the line on the && operator.

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@cjihrig Sure, done.

@@ -116,8 +116,8 @@ const interfaces = os.networkInterfaces();
switch (platform) {
case 'linux':
{
const filter = (e) => e.address === '127.0.0.1';
const actual = interfaces.lo.filter(filter);
const fltr = (e) => e.address === '127.0.0.1' && e.netmask === '255.0.0.0';
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Can you leave the name as filter and just break the line on the && operator.

The check for `os.networkInterfaces()` in `test-os.js` may be too
strict. It's apparently possible for a machine to be configured with
multiple IPv4 loopback interfaces. Increase specificity of filter to
check on only the object we expect.

Fixes: nodejs#14654
@@ -116,7 +116,8 @@ const interfaces = os.networkInterfaces();
switch (platform) {
case 'linux':
{
const filter = (e) => e.address === '127.0.0.1';
const filter =
(e) => e.address === '127.0.0.1' && e.netmask === '255.0.0.0';
const actual = interfaces.lo.filter(filter);
const expected = [{ address: '127.0.0.1', netmask: '255.0.0.0',
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[warning 🚨 scope-creep]
AFAICT expected and the asserting could be hoisted, and switch replaced with if or trinary for selecting interfaces.lo / interfaces['Loopback Pseudo-Interface 1']

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Some reasons to maybe not do that:

  • If we want to add macOS to the switch statement (in another PR), it will have a different expected value. (The MAC address is different. Yes, the MAC address is different on Mac. Ha ha, ha ha, gosh, I'm funny.)

  • Probably don't want to replace the switch because we need a do-nothing default for macos, smartos... A switch makes sense here, I think. I mean, you can make it work with an if, of course. But I think this more verbose code is actually more readable even though it does violate DRY. (I often don't value DRY much in tests, TBH.)

Even if I'm wrong about that evaluation... must...resist....scope creep.

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refack commented Aug 8, 2017

👍

(The MAC address is different. Yes, the MAC address is different on Mac. Ha ha, ha ha, gosh, I'm funny.)

Apple SMH...

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Trott commented Aug 10, 2017

Landed in 2923ed1

@Trott Trott closed this Aug 10, 2017
Trott added a commit to Trott/io.js that referenced this pull request Aug 10, 2017
The check for `os.networkInterfaces()` in `test-os.js` may be too
strict. It's apparently possible for a machine to be configured with
multiple IPv4 loopback interfaces. Increase specificity of filter to
check on only the object we expect.

PR-URL: nodejs#14655
Fixes: nodejs#14654
Reviewed-By: Luigi Pinca <[email protected]>
Reviewed-By: Tobias Nießen <[email protected]>
Reviewed-By: Colin Ihrig <[email protected]>
Reviewed-By: Refael Ackermann <[email protected]>
Reviewed-By: James M Snell <[email protected]>
addaleax pushed a commit that referenced this pull request Aug 10, 2017
The check for `os.networkInterfaces()` in `test-os.js` may be too
strict. It's apparently possible for a machine to be configured with
multiple IPv4 loopback interfaces. Increase specificity of filter to
check on only the object we expect.

PR-URL: #14655
Fixes: #14654
Reviewed-By: Luigi Pinca <[email protected]>
Reviewed-By: Tobias Nießen <[email protected]>
Reviewed-By: Colin Ihrig <[email protected]>
Reviewed-By: Refael Ackermann <[email protected]>
Reviewed-By: James M Snell <[email protected]>
@addaleax addaleax mentioned this pull request Aug 13, 2017
MylesBorins pushed a commit that referenced this pull request Sep 19, 2017
The check for `os.networkInterfaces()` in `test-os.js` may be too
strict. It's apparently possible for a machine to be configured with
multiple IPv4 loopback interfaces. Increase specificity of filter to
check on only the object we expect.

PR-URL: #14655
Fixes: #14654
Reviewed-By: Luigi Pinca <[email protected]>
Reviewed-By: Tobias Nießen <[email protected]>
Reviewed-By: Colin Ihrig <[email protected]>
Reviewed-By: Refael Ackermann <[email protected]>
Reviewed-By: James M Snell <[email protected]>
@MylesBorins MylesBorins mentioned this pull request Sep 20, 2017
@Trott Trott deleted the relax-os branch January 13, 2022 22:46
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nodejs Makefile:196: recipe for target 'test' failed make: *** [test] Error 1
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