doc: use code markup/markdown in headers

This also allows us to remove backslash escaping for `[` and `]`
inside of header code, which makes the bare markdown more readable.

Refs: https://github.com/nodejs/node/pull/31086

PR-URL: https://github.com/nodejs/node/pull/31149
Reviewed-By: Luigi Pinca <luigipinca@gmail.com>
Reviewed-By: Anto Aravinth <anto.aravinth.cse@gmail.com>
Reviewed-By: Beth Griggs <Bethany.Griggs@uk.ibm.com>
Reviewed-By: James M Snell <jasnell@gmail.com>
Reviewed-By: Trivikram Kamat <trivikr.dev@gmail.com>
Reviewed-By: Rich Trott <rtrott@gmail.com>

CPP_STYLE_GUIDE.md

@@ -14,9 +14,9 @@ codebase not related to stylistic issues.
   * [Align function arguments vertically](#align-function-arguments-vertically)
   * [Initialization lists](#initialization-lists)
   * [CamelCase for methods, functions, and classes](#camelcase-for-methods-functions-and-classes)
-  * [snake\_case for local variables and parameters](#snake_case-for-local-variables-and-parameters)
-  * [snake\_case\_ for private class fields](#snake_case_-for-private-class-fields)
-  * [snake\_case for C-like structs](#snake_case-for-c-like-structs)
+  * [`snake_case` for local variables and parameters](#snake_case-for-local-variables-and-parameters)
+  * [`snake_case_` for private class fields](#snake_case_-for-private-class-fields)
+  * [`snake_case` for C-like structs](#snake_case-for-c-like-structs)
   * [Space after `template`](#space-after-template)
 * [Memory Management](#memory-management)
   * [Memory allocation](#memory-allocation)
@@ -155,7 +155,7 @@ class FooBar {
 };
 ```
 
-### snake\_case for local variables and parameters
+### `snake_case` for local variables and parameters
 
 ```c++
 int FunctionThatDoesSomething(const char* important_string) {
@@ -163,7 +163,7 @@ int FunctionThatDoesSomething(const char* important_string) {
 }
 ```
 
-### snake\_case\_ for private class fields
+### `snake_case_` for private class fields
 
 ```c++
 class Foo {
@@ -172,8 +172,9 @@ class Foo {
 };
 ```
 
-### snake\_case for C-like structs
-For plain C-like structs snake_case can be used.
+### `snake_case` for C-like structs
+
+For `plain C-like structs snake_case can be used.
 
 ```c++
 struct foo_bar {

benchmark/README.md

@@ -74,21 +74,21 @@ The common.js module is used by benchmarks for consistency across repeated
 tasks. It has a number of helpful functions and properties to help with
 writing benchmarks.
 
-### createBenchmark(fn, configs\[, options\])
+### `createBenchmark(fn, configs[, options])`
 
 See [the guide on writing benchmarks](writing-and-running-benchmarks.md#basics-of-a-benchmark).
 
-### default\_http\_benchmarker
+### `default_http_benchmarker`
 
 The default benchmarker used to run HTTP benchmarks.
 See [the guide on writing HTTP benchmarks](writing-and-running-benchmarks.md#creating-an-http-benchmark).
 
-### PORT
+### `PORT`
 
 The default port used to run HTTP benchmarks.
 See [the guide on writing HTTP benchmarks](writing-and-running-benchmarks.md#creating-an-http-benchmark).
 
-### sendResult(data)
+### `sendResult(data)`
 
 Used in special benchmarks that can't use `createBenchmark` and the object
 it returns to accomplish what they need. This function reports timing

doc/api/fs.md

@@ -5093,7 +5093,7 @@ changes:
 
 The `Promise` is resolved with the [`fs.Stats`][] object for the given `path`.
 
-### `fsPromises.symlink(target, path\[, type\])`
+### `fsPromises.symlink(target, path[, type])`
 <!-- YAML
 added: v10.0.0
 -->

doc/api/http2.md

@@ -3233,7 +3233,7 @@ const server = http2.createServer((req, res) => {
 });
 ```
 
-#### `response.setTimeout(msecs\[, callback\])`
+#### `response.setTimeout(msecs[, callback])`
 <!-- YAML
 added: v8.4.0
 -->

test/common/README.md

@@ -27,7 +27,7 @@ This directory contains modules used to test the Node.js implementation.
 
 The `benchmark` module is used by tests to run benchmarks.
 
-### runBenchmark(name, args, env)
+### `runBenchmark(name, args, env)`
 
 * `name` [<string>][] Name of benchmark suite to be run.
 * `args` [<Array>][] Array of environment variable key/value pairs (ex:
@@ -39,13 +39,15 @@ The `benchmark` module is used by tests to run benchmarks.
 The `common` module is used by tests for consistency across repeated
 tasks.
 
-### allowGlobals(...whitelist)
+### `allowGlobals(...whitelist)`
+
 * `whitelist` [<Array>][] Array of Globals
 * return [<Array>][]
 
 Takes `whitelist` and concats that with predefined `knownGlobals`.
 
-### canCreateSymLink()
+### `canCreateSymLink()`
+
 * return [<boolean>][]
 
 Checks whether the current running process can create symlinks. On Windows, this
@@ -54,11 +56,11 @@ symlinks
 ([SeCreateSymbolicLinkPrivilege](https://msdn.microsoft.com/en-us/library/windows/desktop/bb530716(v=vs.85).aspx)).
 On non-Windows platforms, this always returns `true`.
 
-### createZeroFilledFile(filename)
+### `createZeroFilledFile(filename)`
 
 Creates a 10 MB file of all null characters.
 
-### disableCrashOnUnhandledRejection()
+### `disableCrashOnUnhandledRejection()`
 
 Removes the `process.on('unhandledRejection')` handler that crashes the process
 after a tick. The handler is useful for tests that use Promises and need to make
@@ -66,12 +68,14 @@ sure no unexpected rejections occur, because currently they result in silent
 failures. However, it is useful in some rare cases to disable it, for example if
 the `unhandledRejection` hook is directly used by the test.
 
-### enoughTestMem
+### `enoughTestMem`
+
 * [<boolean>][]
 
 Indicates if there is more than 1gb of total memory.
 
-### expectsError(validator\[, exact\])
+### `expectsError(validator[, exact])`
+
 * `validator` [<Object>][] | [<RegExp>][] | [<Function>][] |
   [<Error>][] The validator behaves identical to
   `assert.throws(fn, validator)`.
@@ -83,7 +87,8 @@ validated using `assert.throws(() => { throw error; }, validator)`. If the
 returned function has not been called exactly `exact` number of times when the
 test is complete, then the test will fail.
 
-### expectWarning(name\[, expected\[, code\]\])
+### `expectWarning(name[, expected[, code]])`
+
 * `name` [<string>][] | [<Object>][]
 * `expected` [<string>][] | [<Array>][] | [<Object>][]
 * `code` [<string>][]
@@ -129,37 +134,42 @@ expectWarning({
 });
 ```
 
-### getArrayBufferViews(buf)
+### `getArrayBufferViews(buf)`
+
 * `buf` [<Buffer>][]
 * return [<ArrayBufferView>][]\[\]
 
 Returns an instance of all possible `ArrayBufferView`s of the provided Buffer.
 
-### getBufferSources(buf)
+### `getBufferSources(buf)`
+
 * `buf` [<Buffer>][]
 * return [<BufferSource>][]\[\]
 
 Returns an instance of all possible `BufferSource`s of the provided Buffer,
 consisting of all `ArrayBufferView` and an `ArrayBuffer`.
 
-### getCallSite(func)
+### `getCallSite(func)`
+
 * `func` [<Function>][]
 * return [<string>][]
 
 Returns the file name and line number for the provided Function.
 
-### getTTYfd()
+### `getTTYfd()`
 
 Attempts to get a valid TTY file descriptor. Returns `-1` if it fails.
 
 The TTY file descriptor is assumed to be capable of being writable.
 
-### hasCrypto
+### `hasCrypto`
+
 * [<boolean>][]
 
 Indicates whether OpenSSL is available.
 
-### hasFipsCrypto
+### `hasFipsCrypto`
+
 * [<boolean>][]
 
 Indicates that Node.js has been linked with a FIPS compatible OpenSSL library,
@@ -169,83 +179,99 @@ To only detect if the OpenSSL library is FIPS compatible, regardless if it has
 been enabled or not, then `process.config.variables.openssl_is_fips` can be
 used to determine that situation.
 
-### hasIntl
+### `hasIntl`
+
 * [<boolean>][]
 
 Indicates if [internationalization][] is supported.
 
-### hasIPv6
+### `hasIPv6`
+
 * [<boolean>][]
 
 Indicates whether `IPv6` is supported on this platform.
 
-### hasMultiLocalhost
+### `hasMultiLocalhost`
+
 * [<boolean>][]
 
 Indicates if there are multiple localhosts available.
 
-### inFreeBSDJail
+### `inFreeBSDJail`
+
 * [<boolean>][]
 
 Checks whether free BSD Jail is true or false.
 
-### isAIX
+### `isAIX`
+
 * [<boolean>][]
 
 Platform check for Advanced Interactive eXecutive (AIX).
 
-### isAlive(pid)
+### `isAlive(pid)`
+
 * `pid` [<number>][]
 * return [<boolean>][]
 
 Attempts to 'kill' `pid`
 
-### isFreeBSD
+### `isFreeBSD`
+
 * [<boolean>][]
 
 Platform check for Free BSD.
 
-### isIBMi
+### `isIBMi`
+
 * [<boolean>][]
 
 Platform check for IBMi.
 
-### isLinux
+### `isLinux`
+
 * [<boolean>][]
 
 Platform check for Linux.
 
-### isLinuxPPCBE
+### `isLinuxPPCBE`
+
 * [<boolean>][]
 
 Platform check for Linux on PowerPC.
 
-### isOSX
+### `isOSX`
+
 * [<boolean>][]
 
 Platform check for macOS.
 
-### isSunOS
+### `isSunOS`
+
 * [<boolean>][]
 
 Platform check for SunOS.
 
-### isWindows
+### `isWindows`
+
 * [<boolean>][]
 
 Platform check for Windows.
 
-### localhostIPv4
+### `localhostIPv4`
+
 * [<string>][]
 
 IP of `localhost`.
 
-### localIPv6Hosts
+### `localIPv6Hosts`
+
 * [<Array>][]
 
 Array of IPV6 representations for `localhost`.
 
-### mustCall(\[fn\]\[, exact\])
+### `mustCall([fn][, exact])`
+
 * `fn` [<Function>][] default = () => {}
 * `exact` [<number>][] default = 1
 * return [<Function>][]
@@ -256,7 +282,8 @@ fail.
 
 If `fn` is not provided, an empty function will be used.
 
-### mustCallAtLeast(\[fn\]\[, minimum\])
+### `mustCallAtLeast([fn][, minimum])`
+
 * `fn` [<Function>][] default = () => {}
 * `minimum` [<number>][] default = 1
 * return [<Function>][]
@@ -267,14 +294,16 @@ fail.
 
 If `fn` is not provided, an empty function will be used.
 
-### mustNotCall(\[msg\])
+### `mustNotCall([msg])`
+
 * `msg` [<string>][] default = 'function should not have been called'
 * return [<Function>][]
 
 Returns a function that triggers an `AssertionError` if it is invoked. `msg` is
 used as the error message for the `AssertionError`.
 
-### nodeProcessAborted(exitCode, signal)
+### `nodeProcessAborted(exitCode, signal)`
+
 * `exitCode` [<number>][]
 * `signal` [<string>][]
 * return [<boolean>][]
@@ -283,12 +312,14 @@ 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
+### `opensslCli`
+
 * [<boolean>][]
 
 Indicates whether 'opensslCli' is supported.
 
-### platformTimeout(ms)
+### `platformTimeout(ms)`
+
 * `ms` [<number>][] | [<bigint>][]
 * return [<number>][] | [<bigint>][]
 
@@ -296,22 +327,26 @@ Returns a timeout value based on detected conditions. For example, a debug build
 may need extra time so the returned value will be larger than on a release
 build.
 
-### PIPE
+### `PIPE`
+
 * [<string>][]
 
 Path to the test socket.
 
-### PORT
+### `PORT`
+
 * [<number>][]
 
 A port number for tests to use if one is needed.
 
-### printSkipMessage(msg)
+### `printSkipMessage(msg)`
+
 * `msg` [<string>][]
 
 Logs '1..0 # Skipped: ' + `msg`
 
-### pwdCommand
+### `pwdCommand`
+
 * [<array>][] First two argument for the `spawn`/`exec` functions.
 
 Platform normalized `pwd` command options. Usage example:
@@ -322,12 +357,14 @@ const { spawn } = require('child_process');
 spawn(...common.pwdCommand, { stdio: ['pipe'] });
 ```
 
-### rootDir
+### `rootDir`
+
 * [<string>][]
 
 Path to the 'root' directory. either `/` or `c:\\` (windows)
 
-### runWithInvalidFD(func)
+### `runWithInvalidFD(func)`
+
 * `func` [<Function>][]
 
 Runs `func` with an invalid file descriptor that is an unsigned integer and
@@ -335,27 +372,28 @@ can be used to trigger `EBADF` as the first argument. If no such file
 descriptor could be generated, a skip message will be printed and the `func`
 will not be run.
 
-### skip(msg)
+### `skip(msg)`
+
 * `msg` [<string>][]
 
 Logs '1..0 # Skipped: ' + `msg` and exits with exit code `0`.
 
-### skipIfEslintMissing()
+### `skipIfEslintMissing()`
 
 Skip the rest of the tests in the current file when `ESLint` is not available
 at `tools/node_modules/eslint`
 
-### skipIfInspectorDisabled()
+### `skipIfInspectorDisabled()`
 
 Skip the rest of the tests in the current file when the Inspector
 was disabled at compile time.
 
-### skipIf32Bits()
+### `skipIf32Bits()`
 
 Skip the rest of the tests in the current file when the Node.js executable
 was compiled with a pointer size smaller than 64 bits.
 
-### skipIfWorker()
+### `skipIfWorker()`
 
 Skip the rest of the tests in the current file when not running on a main
 thread.
@@ -394,18 +432,18 @@ countdown.dec();
 countdown.dec();
 ```
 
-### new Countdown(limit, callback)
+### `new Countdown(limit, callback)`
 
 * `limit` {number}
 * `callback` {function}
 
 Creates a new `Countdown` instance.
 
-### Countdown.prototype.dec()
+### `Countdown.prototype.dec()`
 
 Decrements the `Countdown` counter.
 
-### Countdown.prototype.remaining
+### `Countdown.prototype.remaining`
 
 Specifies the remaining number of times `Countdown.prototype.dec()` must be
 called before the callback is invoked.
@@ -414,20 +452,20 @@ called before the callback is invoked.
 
 The `cpu-prof` module provides utilities related to CPU profiling tests.
 
-### env
+### `env`
 
 * Default: { ...process.env, NODE_DEBUG_NATIVE: 'INSPECTOR_PROFILER' }
 
 Environment variables used in profiled processes.
 
-### getCpuProfiles(dir)
+### `getCpuProfiles(dir)`
 
 * `dir` {string} The directory containing the CPU profile files.
 * return [<string>][]
 
 Returns an array of all `.cpuprofile` files found in `dir`.
 
-### getFrames(file, suffix)
+### `getFrames(file, suffix)`
 
 * `file` {string} Path to a `.cpuprofile` file.
 * `suffix` {string} Suffix of the URL of call frames to retrieve.
@@ -436,11 +474,11 @@ Returns an array of all `.cpuprofile` files found in `dir`.
 Returns an object containing an array of the relevant call frames and an array
 of all the profile nodes.
 
-### kCpuProfInterval
+### `kCpuProfInterval`
 
 Sampling interval in microseconds.
 
-### verifyFrames(output, file, suffix)
+### `verifyFrames(output, file, suffix)`
 
 * `output` {string}
 * `file` {string}
@@ -449,11 +487,11 @@ Sampling interval in microseconds.
 Throws an `AssertionError` if there are no call frames with the expected
 `suffix` in the profiling data contained in `file`.
 
-## DNS Module
+## `DNS` Module
 
 The `DNS` module provides utilities related to the `dns` built-in module.
 
-### errorLookupMock(code, syscall)
+### `errorLookupMock(code, syscall)`
 
 * `code` [<string>][] Defaults to `dns.mockedErrorCode`.
 * `syscall` [<string>][] Defaults to `dns.mockedSysCall`.
@@ -463,15 +501,15 @@ A mock for the `lookup` option of `net.connect()` that would result in an error
 with the `code` and the `syscall` specified. Returns a function that has the
 same signature as `dns.lookup()`.
 
-### mockedErrorCode
+### `mockedErrorCode`
 
 The default `code` of errors generated by `errorLookupMock`.
 
-### mockedSysCall
+### `mockedSysCall`
 
 The default `syscall` of errors generated by `errorLookupMock`.
 
-### readDomainFromPacket(buffer, offset)
+### `readDomainFromPacket(buffer, offset)`
 
 * `buffer` [<Buffer>][]
 * `offset` [<number>][]
@@ -480,7 +518,7 @@ The default `syscall` of errors generated by `errorLookupMock`.
 Reads the domain string from a packet and returns an object containing the
 number of bytes read and the domain.
 
-### parseDNSPacket(buffer)
+### `parseDNSPacket(buffer)`
 
 * `buffer` [<Buffer>][]
 * return [<Object>][]
@@ -488,21 +526,21 @@ number of bytes read and the domain.
 Parses a DNS packet. Returns an object with the values of the various flags of
 the packet depending on the type of packet.
 
-### writeIPv6(ip)
+### `writeIPv6(ip)`
 
 * `ip` [<string>][]
 * return [<Buffer>][]
 
 Reads an IPv6 String and returns a Buffer containing the parts.
 
-### writeDomainName(domain)
+### `writeDomainName(domain)`
 
 * `domain` [<string>][]
 * return [<Buffer>][]
 
 Reads a Domain String and returns a Buffer containing the domain.
 
-### writeDNSPacket(parsed)
+### `writeDNSPacket(parsed)`
 
 * `parsed` [<Object>][]
 * return [<Buffer>][]
@@ -523,16 +561,16 @@ There is no difference between client or server side beyond their names.
 The behavior of the Node.js test suite can be altered using the following
 environment variables.
 
-### NODE_COMMON_PORT
+### `NODE_COMMON_PORT`
 
 If set, `NODE_COMMON_PORT`'s value overrides the `common.PORT` default value of
 12346.
 
-### NODE_SKIP_FLAG_CHECK
+### `NODE_SKIP_FLAG_CHECK`
 
 If set, command line arguments passed to individual tests are not validated.
 
-### NODE_TEST_KNOWN_GLOBALS
+### `NODE_TEST_KNOWN_GLOBALS`
 
 A comma-separated list of variables names that are appended to the global
 variable whitelist. Alternatively, if `NODE_TEST_KNOWN_GLOBALS` is set to `'0'`,
@@ -543,26 +581,26 @@ global leak detection is disabled.
 The `common/fixtures` module provides convenience methods for working with
 files in the `test/fixtures` directory.
 
-### fixtures.fixturesDir
+### `fixtures.fixturesDir`
 
 * [<string>][]
 
 The absolute path to the `test/fixtures/` directory.
 
-### fixtures.path(...args)
+### `fixtures.path(...args)`
 
 * `...args` [<string>][]
 
 Returns the result of `path.join(fixtures.fixturesDir, ...args)`.
 
-### fixtures.readSync(args\[, enc\])
+### `fixtures.readSync(args[, enc])`
 
 * `args` [<string>][] | [<Array>][]
 
 Returns the result of
 `fs.readFileSync(path.join(fixtures.fixturesDir, ...args), 'enc')`.
 
-### fixtures.readKey(arg\[, enc\])
+### `fixtures.readKey(arg[, enc])`
 
 * `arg` [<string>][]
 
@@ -574,14 +612,14 @@ Returns the result of
 This provides utilities for checking the validity of heap dumps.
 This requires the usage of `--expose-internals`.
 
-### heap.recordState()
+### `heap.recordState()`
 
 Create a heap dump and an embedder graph copy for inspection.
 The returned object has a `validateSnapshotNodes` function similar to the
 one listed below. (`heap.validateSnapshotNodes(...)` is a shortcut for
 `heap.recordState().validateSnapshotNodes(...)`.)
 
-### heap.validateSnapshotNodes(name, expected, options)
+### `heap.validateSnapshotNodes(name, expected, options)`
 
 * `name` [<string>][] Look for this string as the name of heap dump nodes.
 * `expected` [<Array>][] A list of objects, possibly with an `children`
@@ -622,7 +660,8 @@ hijackStdout((data) => {
 console.log('this is sent to the hijacked listener');
 ```
 
-### hijackStderr(listener)
+### `hijackStderr(listener)`
+
 * `listener` [<Function>][]: a listener with a single parameter
   called `data`.
 
@@ -631,7 +670,8 @@ called, `listener` will also be called and the `data` of `write` function will
 be passed to `listener`. What's more, `process.stderr.writeTimes` is a count of
 the number of calls.
 
-### hijackStdout(listener)
+### `hijackStdout(listener)`
+
 * `listener` [<Function>][]: a listener with a single parameter
   called `data`.
 
@@ -727,7 +767,7 @@ const frame = new http2.SettingsFrame(ack);
 socket.write(frame.data);
 ```
 
-### http2.kFakeRequestHeaders
+### `http2.kFakeRequestHeaders`
 
 Set to a `Buffer` instance that contains a minimal set of serialized HTTP/2
 request headers to be used as the payload of a `http2.HeadersFrame`.
@@ -739,7 +779,7 @@ const frame = new http2.HeadersFrame(1, http2.kFakeRequestHeaders, 0, true);
 socket.write(frame.data);
 ```
 
-### http2.kFakeResponseHeaders
+### `http2.kFakeResponseHeaders`
 
 Set to a `Buffer` instance that contains a minimal set of serialized HTTP/2
 response headers to be used as the payload a `http2.HeadersFrame`.
@@ -751,7 +791,7 @@ const frame = new http2.HeadersFrame(1, http2.kFakeResponseHeaders, 0, true);
 socket.write(frame.data);
 ```
 
-### http2.kClientMagic
+### `http2.kClientMagic`
 
 Set to a `Buffer` containing the preamble bytes an HTTP/2 client must send
 upon initial establishment of a connection.
@@ -766,7 +806,7 @@ socket.write(http2.kClientMagic);
 The `common/internet` module provides utilities for working with
 internet-related tests.
 
-### internet.addresses
+### `internet.addresses`
 
 * [<Object>][]
   * `INET_HOST` [<string>][] A generic host that has registered common
@@ -807,7 +847,8 @@ const onGC = require('../common/ongc');
 onGC({}, { ongc() { console.log('collected'); } });
 ```
 
-### onGC(target, listener)
+### `onGC(target, listener)`
+
 * `target` [<Object>][]
 * `listener` [<Object>][]
   * `ongc` [<Function>][]
@@ -827,7 +868,7 @@ should not be in scope when `listener.ongc()` is created.
 The `report` module provides helper functions for testing diagnostic reporting
 functionality.
 
-### findReports(pid, dir)
+### `findReports(pid, dir)`
 
 * `pid` [<number>][] Process ID to retrieve diagnostic report files for.
 * `dir` [<string>][] Directory to search for diagnostic report files.
@@ -836,14 +877,14 @@ functionality.
 Returns an array of diagnotic report file names found in `dir`. The files should
 have been generated by a process whose PID matches `pid`.
 
-### validate(filepath)
+### `validate(filepath)`
 
 * `filepath` [<string>][] Diagnostic report filepath to validate.
 
 Validates the schema of a diagnostic report file whose path is specified in
 `filepath`. If the report fails validation, an exception is thrown.
 
-### validateContent(report)
+### `validateContent(report)`
 
 * `report` [<Object>][] | [<string>][] JSON contents of a diagnostic
   report file, the parsed Object thereof, or the result of
@@ -857,7 +898,7 @@ Validates the schema of a diagnostic report whose content is specified in
 The `tick` module provides a helper function that can be used to call a callback
 after a given number of event loop "ticks".
 
-### tick(x, cb)
+### `tick(x, cb)`
 
 * `x` [<number>][] Number of event loop "ticks".
 * `cb` [<Function>][] A callback function.
@@ -866,12 +907,13 @@ after a given number of event loop "ticks".
 
 The `tmpdir` module supports the use of a temporary directory for testing.
 
-### path
+### `path`
+
 * [<string>][]
 
 The realpath of the testing temporary directory.
 
-### refresh()
+### `refresh()`
 
 Deletes and recreates the testing temporary directory.
 
@@ -884,7 +926,7 @@ parent.
 
 ## WPT Module
 
-### harness
+### `harness`
 
 A legacy port of [Web Platform Tests][] harness.