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# Node.js Core Tests
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This folder contains code and data used to test the Node.js implementation.
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For a detailed guide on how to write tests in this
directory, see [the guide on writing tests ](../doc/guides/writing-tests.md ).
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On how to run tests in this direcotry, see
[the contributing guide ](../CONTRIBUTING.md#step-5-test ).
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## Table of Contents
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* [Test directories ](#test-directories )
* [Common module API ](#common-module-api )
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## Test Directories
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< table >
< thead >
< tr >
< th > Directory< / th >
< th > Runs on CI< / th >
< th > Purpose< / th >
< / tr >
< / thead >
< tbody >
< tr >
< td > abort< / td >
< td > No< / td >
< td >
Tests for when the < code > --abort-on-uncaught-exception< / code >
flag is used.
< / td >
< / tr >
< tr >
< td > addons< / td >
< td > Yes< / td >
< td >
Tests for < a href = "https://nodejs.org/api/addons.html" > addon< / a >
functionality along with some tests that require an addon to function
properly.
< / td >
< / tr >
< tr >
< td > cctest< / td >
< td > Yes< / td >
< td >
C++ test that is run as part of the build process.
< / td >
< / tr >
< tr >
< td > debugger< / td >
< td > No< / td >
< td >
Tests for < a href = "https://nodejs.org/api/debugger.html" > debugger< / a >
functionality along with some tests that require an addon to function
properly.
< / td >
< / tr >
< tr >
< td > disabled< / td >
< td > No< / td >
< td >
Tests that have been disabled from running for various reasons.
< / td >
< / tr >
< tr >
< td > fixtures< / td >
< td > < / td >
< td > Test fixtures used in various tests throughout the test suite.< / td >
< / tr >
< tr >
< td > gc< / td >
< td > No< / td >
< td > Tests for garbage collection related functionality.< / td >
< / tr >
< tr >
< td > inspector< / td >
< td > Yes< / td >
< td > Tests for the V8 inspector integration.< / td >
< / tr >
< tr >
< td > internet< / td >
< td > No< / td >
< td >
Tests that make real outbound connections (mainly networking related
modules). Tests for networking related modules may also be present in
other directories, but those tests do not make outbound connections.
< / td >
< / tr >
< tr >
< td > known_issues< / td >
< td > No< / td >
< td > Tests reproducing known issues within the system.< / td >
< / tr >
< tr >
< td > message< / td >
< td > Yes< / td >
< td >
Tests for messages that are output for various conditions
(< code > console.log< / code > , error messages etc.)< / td >
< / tr >
< tr >
< td > parallel< / td >
< td > Yes< / td >
< td > Various tests that are able to be run in parallel.< / td >
< / tr >
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< tr >
< td > pseudo-tty< / td >
< td > Yes< / td >
< td > Tests that require stdin/stdout/stderr to be a TTY.< / td >
< / tr >
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< tr >
< td > pummel< / td >
< td > No< / td >
< td >
Various tests for various modules / system functionality operating
under load.
< / td >
< / tr >
< tr >
< td > sequential< / td >
< td > Yes< / td >
< td >
Various tests that are run sequentially.
< / td >
< / tr >
< tr >
< td > testpy< / td >
< td > < / td >
< td >
Test configuration utility used by various test suites.
< / td >
< / tr >
< tr >
< td > tick-processor< / td >
< td > No< / td >
< td >
Tests for the V8 tick processor integration. The tests are for the
logic in < code > lib/internal/v8_prof_processor.js< / code > and
< code > lib/internal/v8_prof_polyfill.js< / code > . The tests confirm that
the profile processor packages the correct set of scripts from V8 and
introduces the correct platform specific logic.
< / td >
< / tr >
< tr >
< td > timers< / td >
< td > No< / td >
< td >
Tests for
< a href = "https://nodejs.org/api/timers.html" > timing utilities< / a >
(< code > setTimeout< / code > and < code > setInterval< / code > ).
< / td >
< / tr >
< / tbody >
< / table >
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## Common module API
The common.js module is used by tests for consistency across repeated
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tasks. It has a number of helpful functions and properties to help with
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writing tests.
### allowGlobals(...whitelist)
* `whitelist` [<Array> ](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Array ) Array of Globals
* return [<Array> ](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Array )
Takes `whitelist` and concats that with predefined `knownGlobals` .
### arrayStream
A stream to push an array into a REPL
### busyLoop(time)
* `time` [<Number> ](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Data_structures#Number_type )
Blocks for `time` amount of time.
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### canCreateSymLink
API to indicate whether the current running process can create
symlinks. On Windows, this returns false if the process running
doesn't have privileges to create symlinks (specifically
[SeCreateSymbolicLinkPrivilege ](https://msdn.microsoft.com/en-us/library/windows/desktop/bb530716(v=vs.85 ).aspx)).
On non-Windows platforms, this currently returns true.
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### ddCommand(filename, kilobytes)
* return [<Object> ](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Object )
Platform normalizes the `dd` command
### enoughTestMem
* return [<Boolean> ](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Data_structures#Boolean_type )
Check if there is more than 1gb of total memory.
test: change common.expectsError() signature
One downside to `common.expectsError()` is that it increases the
abstractions people have to learn about in order to work with even
simple tests. Whereas before, all they had to know about is
`assert.throws()`, now they have to *also* know about
`common.expectsError()`. This is very different (IMO) from
`common.mustCall()` in that the latter has an intuitively understandable
name, accepts arguments as one would expect, and (in most cases) doesn't
actually require reading documentation or code to figure out what it's
doing. With `common.expectsError()`, there's a fair bit of magic. Like,
it's not obvious what the first argument would be. Or the second. Or the
third. You just have to know.
This PR changes the arguments accepted by `common.expectsError()` to a
single settings object. Someone coming across this has a hope of
understanding what's going on without reading source or docs:
```js
const validatorFunction = common.expectsError({code: 'ELOOP',
type: Error,
message: 'foo'});
```
This, by comparison, is harder to grok:
```js
const validatorFunction = common.expectsError('ELOOP',
Error,
'foo');
```
And this is especially wat-inducing:
```js
common.expectsError(undefined, undefined, 'looped doodad found');
```
It's likely that only people who work with tests frequently can be
expected to remember the three arguments and their order. By comparison,
remembering that the error code is `code` and the message is `message`
might be manageable.
PR-URL: https://github.com/nodejs/node/pull/11512
Reviewed-By: James M Snell <jasnell@gmail.com>
Reviewed-By: Joyee Cheung <joyeec9h3@gmail.com>
Reviewed-By: Sakthipriyan Vairamani <thechargingvolcano@gmail.com>
Reviewed-By: Yuta Hiroto <hello@about-hiroppy.com>
Reviewed-By: Colin Ihrig <cjihrig@gmail.com>
Reviewed-By: Luigi Pinca <luigipinca@gmail.com>
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### expectsError(settings)
* `settings` [<Object> ](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Object )
with the following optional properties:
* `code` [<String> ](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Data_structures#String_type )
expected error must have this value for its `code` property
* `type` [<Function> ](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Function )
expected error must be an instance of `type`
* `message` [<String> ](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Data_structures#String_type )
or [<RegExp> ](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/RegExp )
if a string is provided for `message` , expected error must have it for its
`message` property; if a regular expression is provided for `message` , the
regular expression must match the `message` property of the expected error
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* return function suitable for use as a validation function passed as the second
argument to `assert.throws()`
The expected error should be [subclassed by the `internal/errors` module ](https://github.com/nodejs/node/blob/master/doc/guides/using-internal-errors.md#api ).
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### expectWarning(name, expected)
* `name` [<String> ](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Data_structures#String_type )
* `expected` [<String> ](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Data_structures#String_type ) | [<Array> ](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Array )
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Tests whether `name` and `expected` are part of a raised warning.
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### hasCrypto
* return [<Boolean> ](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Data_structures#Boolean_type )
Checks for 'openssl'.
### hasFipsCrypto
* return [<Boolean> ](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Data_structures#Boolean_type )
Checks `hasCrypto` and `crypto` with fips.
### hasIPv6
* return [<Boolean> ](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Data_structures#Boolean_type )
Checks whether `IPv6` is supported on this platform.
### hasMultiLocalhost
* return [<Boolean> ](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Data_structures#Boolean_type )
Checks if there are multiple localhosts available.
### fail(msg)
* `msg` [<String> ](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Data_structures#String_type )
* return [<Boolean> ](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Data_structures#Boolean_type )
Throws an `AssertionError` with `msg`
### fileExists(pathname)
* pathname [<String> ](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Data_structures#String_type )
* return [<Boolean> ](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Data_structures#Boolean_type )
Checks if `pathname` exists
### fixturesDir
* return [<String> ](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Data_structures#String_type )
Path to the 'fixtures' directory.
### globalCheck
* return [<Boolean> ](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Data_structures#Boolean_type )
Turn this off if the test should not check for global leaks.
### inFreeBSDJail
* return [<Boolean> ](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Data_structures#Boolean_type )
Checks whether free BSD Jail is true or false.
### isAix
* return [<Boolean> ](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Data_structures#Boolean_type )
Platform check for Advanced Interactive eXecutive (AIX).
### isAlive(pid)
* `pid` [<Number> ](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Data_structures#Number_type )
* return [<Boolean> ](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Data_structures#Boolean_type )
Attempts to 'kill' `pid`
### isFreeBSD
* return [<Boolean> ](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Data_structures#Boolean_type )
Platform check for Free BSD.
### isLinux
* return [<Boolean> ](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Data_structures#Boolean_type )
Platform check for Linux.
### isLinuxPPCBE
* return [<Boolean> ](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Data_structures#Boolean_type )
Platform check for Linux on PowerPC.
### isOSX
* return [<Boolean> ](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Data_structures#Boolean_type )
Platform check for OS X.
### isSunOS
* return [<Boolean> ](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Data_structures#Boolean_type )
Platform check for SunOS.
### isWindows
* return [<Boolean> ](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Data_structures#Boolean_type )
Platform check for Windows.
### isWOW64
* return [<Boolean> ](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Data_structures#Boolean_type )
Platform check for Windows 32-bit on Windows 64-bit.
### leakedGlobals
* return [<Array> ](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Array )
Checks whether any globals are not on the `knownGlobals` list.
### localhostIPv4
* return [<String> ](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Data_structures#String_type )
Gets IP of localhost
### localIPv6Hosts
* return [<Array> ](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Array )
Array of IPV6 hosts.
### mustCall(fn[, expected])
* fn [<Function> ](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Function )
* expected [<Number> ](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Data_structures#Number_type ) default = 1
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* return [<Function> ](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Function )
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Returns a function that calls `fn` . If the returned function has not been called
exactly `expected` number of times when the test is complete, then the test will
fail.
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### nodeProcessAborted(exitCode, signal)
* `exitCode` [<Number> ](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Data_structures#Number_type )
* `signal` [<String> ](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Data_structures#String_type )
* return [<Boolean> ](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Data_structures#Boolean_type )
Returns `true` if the exit code `exitCode` and/or signal name `signal` represent the exit code and/or signal name of a node process that aborted, `false` otherwise.
### opensslCli
* return [<Boolean> ](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Data_structures#Boolean_type )
Checks whether 'opensslCli' is supported.
### platformTimeout(ms)
* `ms` [<Number> ](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Data_structures#Number_type )
* return [<Number> ](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Data_structures#Number_type )
Platform normalizes timeout.
### PIPE
* return [<String> ](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Data_structures#String_type )
Path to the test sock.
### PORT
* return [<Number> ](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Data_structures#Number_type ) default = `12346`
Port tests are running on.
### refreshTmpDir
* return [<String> ](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Data_structures#String_type )
Deletes the 'tmp' dir and recreates it
### rootDir
* return [<String> ](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Data_structures#String_type )
Path to the 'root' directory. either `/` or `c:\\` (windows)
### skip(msg)
* `msg` [<String> ](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Data_structures#String_type )
Logs '1..0 # Skipped: ' + `msg`
### spawnPwd(options)
* `options` [<Object> ](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Object )
* return [<Object> ](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Object )
Platform normalizes the `pwd` command.
### spawnSyncPwd(options)
* `options` [<Object> ](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Object )
* return [<Object> ](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Object )
Synchronous version of `spawnPwd` .
### tmpDir
* return [<String> ](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Data_structures#String_type )
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The realpath of the 'tmp' directory.
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### tmpDirName
* return [<String> ](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Data_structures#String_type )
Name of the temp directory used by tests.
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### WPT
A port of parts of
[W3C testharness.js ](https://github.com/w3c/testharness.js ) for testing the
Node.js
[WHATWG URL API ](https://nodejs.org/api/url.html#url_the_whatwg_url_api )
implementation with tests from
[W3C Web Platform Tests ](https://github.com/w3c/web-platform-tests ).
