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const {
ArrayPrototypePush,
ArrayPrototypeReduce,
ArrayPrototypeShift,
ArrayPrototypeUnshift,
FunctionPrototype,
Number,
PromiseResolve,
ReflectApply,
SafeMap,
} = primordials;
const { AsyncResource } = require('async_hooks');
const {
codes: {
ERR_TEST_FAILURE,
},
kIsNodeError,
} = require('internal/errors');
const { getOptionValue } = require('internal/options');
const { TapStream } = require('internal/test_runner/tap_stream');
const { createDeferredCallback } = require('internal/test_runner/utils');
const {
createDeferredPromise,
kEmptyObject,
} = require('internal/util');
const { isPromise } = require('internal/util/types');
const { isUint32 } = require('internal/validators');
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 kDefaultIndent = ' ';
const noop = FunctionPrototype;
const isTestRunner = getOptionValue('--test');
const testOnlyFlag = !isTestRunner && getOptionValue('--test-only');
// TODO(cjihrig): Use uv_available_parallelism() once it lands.
const rootConcurrency = isTestRunner ? cpus().length : 1;
class TestContext {
#test;
constructor(test) {
this.#test = test;
}
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();
}
}
class Test extends AsyncResource {
constructor(options) {
super('Test');
let { fn, name, parent, skip } = options;
const { concurrency, only, todo } = 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 = rootConcurrency;
this.indent = '';
this.indentString = kDefaultIndent;
this.only = testOnlyFlag;
this.reporter = new TapStream();
this.runOnlySubtests = this.only;
this.testNumber = 0;
} 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;
}
if (isUint32(concurrency) && concurrency !== 0) {
this.concurrency = concurrency;
}
if (testOnlyFlag && !this.only) {
skip = '\'only\' option not set';
}
if (skip) {
fn = noop;
}
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.waitingOn = 0;
this.finished = false;
}
hasConcurrency() {
return this.concurrency > this.activeSubtests;
}
addPendingSubtest(deferred) {
this.pendingSubtests.push(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.
if (this.finished) {
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 (this.finished) {
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;
}
cancel() {
if (this.endTime !== null) {
return;
}
this.fail(
new ERR_TEST_FAILURE(
'test did not finish before its parent and was cancelled',
kCancelledByParent
)
);
this.cancelled = true;
}
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();
}
getRunArgs() {
const ctx = new TestContext(this);
return { ctx, args: [ctx] };
}
async run() {
this.parent.activeSubtests++;
this.startTime = hrtime();
try {
const { args, ctx } = this.getRunArgs();
ArrayPrototypeUnshift(args, this.fn, ctx); // Note that if it's not OK to mutate args, we need to first clone it.
if (this.fn.length === args.length - 1) {
// This test is using legacy Node.js error first callbacks.
const { promise, cb } = createDeferredCallback();
ArrayPrototypePush(args, cb);
const ret = ReflectApply(this.runInAsyncScope, this, args);
if (isPromise(ret)) {
this.fail(new ERR_TEST_FAILURE(
'passed a callback but also returned a Promise',
kCallbackAndPromisePresent
));
await ret;
} else {
await promise;
}
} else {
// This test is synchronous or using Promises.
await ReflectApply(this.runInAsyncScope, this, args);
}
this.pass();
} catch (err) {
if (err?.code === 'ERR_TEST_FAILURE' && kIsNodeError in err) {
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() {
let failedSubtests = 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();
}
// The test has run, so recursively cancel any outstanding subtests and
// mark this test as failed if any subtests failed.
for (let i = 0; i < this.subtests.length; i++) {
const subtest = this.subtests[i];
if (!subtest.finished) {
subtest.cancel();
subtest.postRun();
}
if (!subtest.passed) {
failedSubtests++;
}
}
if (this.passed && failedSubtests > 0) {
const subtestString = `subtest${failedSubtests > 1 ? 's' : ''}`;
const msg = `${failedSubtests} ${subtestString} failed`;
this.fail(new ERR_TEST_FAILURE(msg, kSubtestsFailed));
}
if (this.parent !== null) {
this.parent.activeSubtests--;
this.parent.addReadySubtest(this);
this.parent.processReadySubtestRange(false);
this.parent.processPendingSubtests();
}
}
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;
}
report() {
// Duration is recorded in BigInt nanoseconds. Convert to seconds.
const duration = Number(this.endTime - this.startTime) / 1_000_000_000;
const message = `- ${this.name}`;
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, message, directive);
} else {
this.reporter.fail(this.indent, this.testNumber, message, directive);
}
this.reporter.details(this.indent, duration, this.error);
for (let i = 0; i < this.diagnostics.length; i++) {
this.reporter.diagnostic(this.indent, this.diagnostics[i]);
}
}
}
class ItTest extends Test {
constructor(opt) { super(opt); } // eslint-disable-line no-useless-constructor
getRunArgs() {
return { ctx: {}, args: [] };
}
}
class Suite extends Test {
constructor(options) {
super(options);
this.runInAsyncScope(this.fn);
this.fn = () => {};
this.finished = true; // Forbid adding subtests to this suite
}
start() {
return this.run();
}
async run() {
this.parent.activeSubtests++;
this.startTime = hrtime();
const subtests = this.skipped ? [] : this.subtests;
await ArrayPrototypeReduce(subtests, async (prev, subtest) => {
await prev;
await subtest.run();
}, PromiseResolve());
this.pass();
this.postRun();
}
}
module.exports = { kDefaultIndent, kSubtestsFailed, kTestCodeFailure, Test, Suite, ItTest };
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