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const {
ArrayPrototypeMap,
ArrayPrototypePush,
ArrayPrototypeReduce,
ArrayPrototypeShift,
ArrayPrototypeSlice,
ArrayPrototypeSome,
ArrayPrototypeUnshift,
FunctionPrototype,
MathMax,
Number,
ObjectSeal,
PromisePrototypeThen,
PromiseResolve,
ReflectApply,
RegExpPrototypeExec,
SafeMap,
SafeSet,
SafePromiseAll,
SafePromiseRace,
Symbol,
} = primordials;
const { AsyncResource } = require('async_hooks');
const { once } = require('events');
const { AbortController } = require('internal/abort_controller');
const {
codes: {
ERR_INVALID_ARG_TYPE,
ERR_TEST_FAILURE,
},
AbortError,
} = require('internal/errors');
const { getOptionValue } = require('internal/options');
const { TapStream } = require('internal/test_runner/tap_stream');
const {
convertStringToRegExp,
createDeferredCallback,
isTestFailureError,
} = require('internal/test_runner/utils');
const {
createDeferredPromise,
kEmptyObject,
} = require('internal/util');
const { isPromise } = require('internal/util/types');
const {
validateAbortSignal,
validateNumber,
validateOneOf,
validateUint32,
} = require('internal/validators');
const { setTimeout } = require('timers/promises');
const { TIMEOUT_MAX } = require('internal/timers');
const { cpus } = require('os');
const { bigint: hrtime } = process.hrtime;
const kCallbackAndPromisePresent = 'callbackAndPromisePresent';
const kCancelledByParent = 'cancelledByParent';
const kParentAlreadyFinished = 'parentAlreadyFinished';
const kSubtestsFailed = 'subtestsFailed';
const kTestCodeFailure = 'testCodeFailure';
const kTestTimeoutFailure = 'testTimeoutFailure';
const kHookFailure = 'hookFailed';
const kDefaultIndent = ' ';
const kDefaultTimeout = null;
const noop = FunctionPrototype;
const isTestRunner = getOptionValue('--test');
const testOnlyFlag = !isTestRunner && getOptionValue('--test-only');
const testNamePatternFlag = isTestRunner ? null :
getOptionValue('--test-name-pattern');
const testNamePatterns = testNamePatternFlag?.length > 0 ?
ArrayPrototypeMap(
testNamePatternFlag,
(re) => convertStringToRegExp(re, '--test-name-pattern')
) : null;
const kShouldAbort = Symbol('kShouldAbort');
const kRunHook = Symbol('kRunHook');
const kHookNames = ObjectSeal(['before', 'after', 'beforeEach', 'afterEach']);
const kUnwrapErrors = new SafeSet()
.add(kTestCodeFailure).add(kHookFailure)
.add('uncaughtException').add('unhandledRejection');
function stopTest(timeout, signal) {
if (timeout === kDefaultTimeout) {
return once(signal, 'abort');
}
return PromisePrototypeThen(setTimeout(timeout, null, { ref: false, signal }), () => {
throw new ERR_TEST_FAILURE(
`test timed out after ${timeout}ms`,
kTestTimeoutFailure
);
});
}
class TestContext {
#test;
constructor(test) {
this.#test = test;
}
get signal() {
return this.#test.signal;
}
get name() {
return this.#test.name;
}
diagnostic(message) {
this.#test.diagnostic(message);
}
runOnly(value) {
this.#test.runOnlySubtests = !!value;
}
skip(message) {
this.#test.skip(message);
}
todo(message) {
this.#test.todo(message);
}
test(name, options, fn) {
// eslint-disable-next-line no-use-before-define
const subtest = this.#test.createSubtest(Test, name, options, fn);
return subtest.start();
}
beforeEach(fn, options) {
this.#test.createHook('beforeEach', fn, options);
}
afterEach(fn, options) {
this.#test.createHook('afterEach', fn, options);
}
}
class Test extends AsyncResource {
#abortController;
#outerSignal;
constructor(options) {
super('Test');
let { fn, name, parent, skip } = options;
const { concurrency, only, timeout, todo, signal } = options;
if (typeof fn !== 'function') {
fn = noop;
}
if (typeof name !== 'string' || name === '') {
name = fn.name || '<anonymous>';
}
if (!(parent instanceof Test)) {
parent = null;
}
if (parent === null) {
this.concurrency = 1;
this.indent = '';
this.indentString = kDefaultIndent;
this.only = testOnlyFlag;
this.reporter = new TapStream();
this.runOnlySubtests = this.only;
this.testNumber = 0;
this.timeout = kDefaultTimeout;
} else {
const indent = parent.parent === null ? parent.indent :
parent.indent + parent.indentString;
this.concurrency = parent.concurrency;
this.indent = indent;
this.indentString = parent.indentString;
this.only = only ?? !parent.runOnlySubtests;
this.reporter = parent.reporter;
this.runOnlySubtests = !this.only;
this.testNumber = parent.subtests.length + 1;
this.timeout = parent.timeout;
}
switch (typeof concurrency) {
case 'number':
validateUint32(concurrency, 'options.concurrency', 1);
this.concurrency = concurrency;
break;
case 'boolean':
if (concurrency) {
// TODO(cjihrig): Use uv_available_parallelism() once it lands.
this.concurrency = parent === null ? MathMax(cpus().length - 1, 1) : Infinity;
} else {
this.concurrency = 1;
}
break;
default:
if (concurrency != null)
throw new ERR_INVALID_ARG_TYPE('options.concurrency', ['boolean', 'number'], concurrency);
}
if (timeout != null && timeout !== Infinity) {
validateNumber(timeout, 'options.timeout', 0, TIMEOUT_MAX);
this.timeout = timeout;
}
if (testNamePatterns !== null) {
// eslint-disable-next-line no-use-before-define
const match = this instanceof TestHook || ArrayPrototypeSome(
testNamePatterns,
(re) => RegExpPrototypeExec(re, name) !== null
);
if (!match) {
skip = 'test name does not match pattern';
}
}
if (testOnlyFlag && !this.only) {
skip = '\'only\' option not set';
}
if (skip) {
fn = noop;
}
this.#abortController = new AbortController();
this.#outerSignal = signal;
this.signal = this.#abortController.signal;
validateAbortSignal(signal, 'options.signal');
this.#outerSignal?.addEventListener('abort', this.#abortHandler);
this.fn = fn;
this.name = name;
this.parent = parent;
this.cancelled = false;
this.skipped = !!skip;
this.isTodo = !!todo;
this.startTime = null;
this.endTime = null;
this.passed = false;
this.error = null;
this.diagnostics = [];
this.message = typeof skip === 'string' ? skip :
typeof todo === 'string' ? todo : null;
this.activeSubtests = 0;
this.pendingSubtests = [];
this.readySubtests = new SafeMap();
this.subtests = [];
this.hooks = {
before: [],
after: [],
beforeEach: [],
afterEach: [],
};
this.waitingOn = 0;
this.finished = false;
}
hasConcurrency() {
return this.concurrency > this.activeSubtests;
}
addPendingSubtest(deferred) {
ArrayPrototypePush(this.pendingSubtests, deferred);
}
async processPendingSubtests() {
while (this.pendingSubtests.length > 0 && this.hasConcurrency()) {
const deferred = ArrayPrototypeShift(this.pendingSubtests);
await deferred.test.run();
deferred.resolve();
}
}
addReadySubtest(subtest) {
this.readySubtests.set(subtest.testNumber, subtest);
}
processReadySubtestRange(canSend) {
const start = this.waitingOn;
const end = start + this.readySubtests.size;
for (let i = start; i < end; i++) {
const subtest = this.readySubtests.get(i);
// Check if the specified subtest is in the map. If it is not, return
// early to avoid trying to process any more tests since they would be
// out of order.
if (subtest === undefined) {
return;
}
// Call isClearToSend() in the loop so that it is:
// - Only called if there are results to report in the correct order.
// - Guaranteed to only be called a maximum of once per call to
// processReadySubtestRange().
canSend = canSend || this.isClearToSend();
if (!canSend) {
return;
}
if (i === 1 && this.parent !== null) {
this.reporter.subtest(this.indent, this.name);
}
// Report the subtest's results and remove it from the ready map.
subtest.finalize();
this.readySubtests.delete(i);
}
}
createSubtest(Factory, name, options, fn, overrides) {
if (typeof name === 'function') {
fn = name;
} else if (name !== null && typeof name === 'object') {
fn = options;
options = name;
} else if (typeof options === 'function') {
fn = options;
}
if (options === null || typeof options !== 'object') {
options = kEmptyObject;
}
let parent = this;
// If this test has already ended, attach this test to the root test so
// that the error can be properly reported.
const preventAddingSubtests = this.finished || this.buildPhaseFinished;
if (preventAddingSubtests) {
while (parent.parent !== null) {
parent = parent.parent;
}
}
const test = new Factory({ __proto__: null, fn, name, parent, ...options, ...overrides });
if (parent.waitingOn === 0) {
parent.waitingOn = test.testNumber;
}
if (preventAddingSubtests) {
test.startTime = test.startTime || hrtime();
test.fail(
new ERR_TEST_FAILURE(
'test could not be started because its parent finished',
kParentAlreadyFinished
)
);
}
ArrayPrototypePush(parent.subtests, test);
return test;
}
#abortHandler = () => {
this.cancel(this.#outerSignal?.reason || new AbortError('The test was aborted'));
};
cancel(error) {
if (this.endTime !== null) {
return;
}
this.fail(error ||
new ERR_TEST_FAILURE(
'test did not finish before its parent and was cancelled',
kCancelledByParent
)
);
this.startTime = this.startTime || this.endTime; // If a test was canceled before it was started, e.g inside a hook
this.cancelled = true;
this.#abortController.abort();
}
createHook(name, fn, options) {
validateOneOf(name, 'hook name', kHookNames);
// eslint-disable-next-line no-use-before-define
const hook = new TestHook(fn, options);
ArrayPrototypePush(this.hooks[name], hook);
return hook;
}
fail(err) {
if (this.error !== null) {
return;
}
this.endTime = hrtime();
this.passed = false;
this.error = err;
}
pass() {
if (this.endTime !== null) {
return;
}
this.endTime = hrtime();
this.passed = true;
}
skip(message) {
this.skipped = true;
this.message = message;
}
todo(message) {
this.isTodo = true;
this.message = message;
}
diagnostic(message) {
ArrayPrototypePush(this.diagnostics, message);
}
start() {
// If there is enough available concurrency to run the test now, then do
// it. Otherwise, return a Promise to the caller and mark the test as
// pending for later execution.
if (!this.parent.hasConcurrency()) {
const deferred = createDeferredPromise();
deferred.test = this;
this.parent.addPendingSubtest(deferred);
return deferred.promise;
}
return this.run();
}
[kShouldAbort]() {
if (this.signal.aborted) {
return true;
}
if (this.#outerSignal?.aborted) {
this.cancel(this.#outerSignal.reason || new AbortError('The test was aborted'));
return true;
}
}
getRunArgs() {
const ctx = new TestContext(this);
return { ctx, args: [ctx] };
}
async [kRunHook](hook, args) {
validateOneOf(hook, 'hook name', kHookNames);
try {
await ArrayPrototypeReduce(this.hooks[hook], async (prev, hook) => {
await prev;
await hook.run(args);
if (hook.error) {
throw hook.error;
}
}, PromiseResolve());
} catch (err) {
const error = new ERR_TEST_FAILURE(`failed running ${hook} hook`, kHookFailure);
error.cause = isTestFailureError(err) ? err.cause : err;
throw error;
}
}
async run() {
if (this.parent !== null) {
this.parent.activeSubtests++;
}
this.startTime = hrtime();
if (this[kShouldAbort]()) {
this.postRun();
return;
}
try {
const { args, ctx } = this.getRunArgs();
if (this.parent?.hooks.beforeEach.length > 0) {
await this.parent[kRunHook]('beforeEach', { args, ctx });
}
const stopPromise = stopTest(this.timeout, this.signal);
const runArgs = ArrayPrototypeSlice(args);
ArrayPrototypeUnshift(runArgs, this.fn, ctx);
if (this.fn.length === runArgs.length - 1) {
// This test is using legacy Node.js error first callbacks.
const { promise, cb } = createDeferredCallback();
ArrayPrototypePush(runArgs, cb);
const ret = ReflectApply(this.runInAsyncScope, this, runArgs);
if (isPromise(ret)) {
this.fail(new ERR_TEST_FAILURE(
'passed a callback but also returned a Promise',
kCallbackAndPromisePresent
));
await SafePromiseRace([ret, stopPromise]);
} else {
await SafePromiseRace([PromiseResolve(promise), stopPromise]);
}
} else {
// This test is synchronous or using Promises.
const promise = ReflectApply(this.runInAsyncScope, this, runArgs);
await SafePromiseRace([PromiseResolve(promise), stopPromise]);
}
if (this[kShouldAbort]()) {
this.postRun();
return;
}
if (this.parent?.hooks.afterEach.length > 0) {
await this.parent[kRunHook]('afterEach', { args, ctx });
}
this.pass();
} catch (err) {
if (isTestFailureError(err)) {
if (err.failureType === kTestTimeoutFailure) {
this.cancel(err);
} else {
this.fail(err);
}
} else {
this.fail(new ERR_TEST_FAILURE(err, kTestCodeFailure));
}
}
// Clean up the test. Then, try to report the results and execute any
// tests that were pending due to available concurrency.
this.postRun();
}
postRun(pendingSubtestsError) {
const counters = { __proto__: null, failed: 0, passed: 0, cancelled: 0, skipped: 0, todo: 0, totalFailed: 0 };
// If the test was failed before it even started, then the end time will
// be earlier than the start time. Correct that here.
if (this.endTime < this.startTime) {
this.endTime = hrtime();
}
this.startTime ??= this.endTime;
// The test has run, so recursively cancel any outstanding subtests and
// mark this test as failed if any subtests failed.
this.pendingSubtests = [];
for (let i = 0; i < this.subtests.length; i++) {
const subtest = this.subtests[i];
if (!subtest.finished) {
subtest.cancel(pendingSubtestsError);
subtest.postRun(pendingSubtestsError);
}
// Check SKIP and TODO tests first, as those should not be counted as
// failures.
if (subtest.skipped) {
counters.skipped++;
} else if (subtest.isTodo) {
counters.todo++;
} else if (subtest.cancelled) {
counters.cancelled++;
} else if (!subtest.passed) {
counters.failed++;
} else {
counters.passed++;
}
if (!subtest.passed) {
counters.totalFailed++;
}
}
if ((this.passed || this.parent === null) && counters.totalFailed > 0) {
const subtestString = `subtest${counters.totalFailed > 1 ? 's' : ''}`;
const msg = `${counters.totalFailed} ${subtestString} failed`;
this.fail(new ERR_TEST_FAILURE(msg, kSubtestsFailed));
}
this.#outerSignal?.removeEventListener('abort', this.#abortHandler);
if (this.parent !== null) {
this.parent.activeSubtests--;
this.parent.addReadySubtest(this);
this.parent.processReadySubtestRange(false);
this.parent.processPendingSubtests();
} else if (!this.reported) {
this.reported = true;
this.reporter.plan(this.indent, this.subtests.length);
for (let i = 0; i < this.diagnostics.length; i++) {
this.reporter.diagnostic(this.indent, this.diagnostics[i]);
}
this.reporter.diagnostic(this.indent, `tests ${this.subtests.length}`);
this.reporter.diagnostic(this.indent, `pass ${counters.passed}`);
this.reporter.diagnostic(this.indent, `fail ${counters.failed}`);
this.reporter.diagnostic(this.indent, `cancelled ${counters.cancelled}`);
this.reporter.diagnostic(this.indent, `skipped ${counters.skipped}`);
this.reporter.diagnostic(this.indent, `todo ${counters.todo}`);
this.reporter.diagnostic(this.indent, `duration_ms ${this.#duration()}`);
this.reporter.push(null);
}
}
isClearToSend() {
return this.parent === null ||
(
this.parent.waitingOn === this.testNumber && this.parent.isClearToSend()
);
}
finalize() {
// By the time this function is called, the following can be relied on:
// - The current test has completed or been cancelled.
// - All of this test's subtests have completed or been cancelled.
// - It is the current test's turn to report its results.
// Report any subtests that have not been reported yet. Since all of the
// subtests have finished, it's safe to pass true to
// processReadySubtestRange(), which will finalize all remaining subtests.
this.processReadySubtestRange(true);
// Output this test's results and update the parent's waiting counter.
if (this.subtests.length > 0) {
this.reporter.plan(this.subtests[0].indent, this.subtests.length);
} else {
this.reporter.subtest(this.indent, this.name);
}
this.report();
this.parent.waitingOn++;
this.finished = true;
}
#duration() {
// Duration is recorded in BigInt nanoseconds. Convert to milliseconds.
return Number(this.endTime - this.startTime) / 1_000_000;
}
report() {
let directive;
if (this.skipped) {
directive = this.reporter.getSkip(this.message);
} else if (this.isTodo) {
directive = this.reporter.getTodo(this.message);
}
if (this.passed) {
this.reporter.ok(this.indent, this.testNumber, this.name, this.#duration(), directive);
} else {
this.reporter.fail(this.indent, this.testNumber, this.name, this.#duration(), this.error, directive);
}
for (let i = 0; i < this.diagnostics.length; i++) {
this.reporter.diagnostic(this.indent, this.diagnostics[i]);
}
}
}
class TestHook extends Test {
#args;
constructor(fn, options) {
if (options === null || typeof options !== 'object') {
options = kEmptyObject;
}
const { timeout, signal } = options;
super({ __proto__: null, fn, timeout, signal });
}
run(args) {
this.#args = args;
return super.run();
}
getRunArgs() {
return this.#args;
}
postRun() {
}
}
class ItTest extends Test {
constructor(opt) { super(opt); } // eslint-disable-line no-useless-constructor
getRunArgs() {
return { ctx: { signal: this.signal, name: this.name }, args: [] };
}
}
class Suite extends Test {
constructor(options) {
super(options);
try {
const { ctx, args } = this.getRunArgs();
this.buildSuite = PromisePrototypeThen(
PromiseResolve(this.runInAsyncScope(this.fn, ctx, args)),
undefined,
(err) => {
this.fail(new ERR_TEST_FAILURE(err, kTestCodeFailure));
});
} catch (err) {
this.fail(new ERR_TEST_FAILURE(err, kTestCodeFailure));
}
this.fn = () => {};
this.buildPhaseFinished = true;
}
getRunArgs() {
return { ctx: { signal: this.signal, name: this.name }, args: [] };
}
async run() {
try {
this.parent.activeSubtests++;
await this.buildSuite;
this.startTime = hrtime();
if (this[kShouldAbort]()) {
this.subtests = [];
this.postRun();
return;
}
const hookArgs = this.getRunArgs();
await this[kRunHook]('before', hookArgs);
const stopPromise = stopTest(this.timeout, this.signal);
const subtests = this.skipped || this.error ? [] : this.subtests;
const promise = SafePromiseAll(subtests, (subtests) => subtests.start());
await SafePromiseRace([promise, stopPromise]);
await this[kRunHook]('after', hookArgs);
this.pass();
} catch (err) {
if (isTestFailureError(err)) {
this.fail(err);
} else {
this.fail(new ERR_TEST_FAILURE(err, kTestCodeFailure));
}
}
this.postRun();
}
}
module.exports = {
ItTest,
kCancelledByParent,
kDefaultIndent,
kSubtestsFailed,
kTestCodeFailure,
kUnwrapErrors,
Suite,
Test,
};
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