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denoland-deno/runtime/js/40_testing.js

1406 lines
48 KiB
JavaScript

// Copyright 2018-2022 the Deno authors. All rights reserved. MIT license.
"use strict";
((window) => {
const core = window.Deno.core;
const ops = core.ops;
const { setExitHandler } = window.__bootstrap.os;
const { Console } = window.__bootstrap.console;
const { serializePermissions } = window.__bootstrap.permissions;
const { assert } = window.__bootstrap.infra;
const {
ArrayFrom,
ArrayPrototypeFilter,
ArrayPrototypeJoin,
ArrayPrototypeMap,
ArrayPrototypePush,
ArrayPrototypeShift,
ArrayPrototypeSort,
BigInt,
DateNow,
Error,
FunctionPrototype,
Map,
MapPrototypeGet,
MapPrototypeHas,
MapPrototypeSet,
MathCeil,
ObjectKeys,
ObjectPrototypeIsPrototypeOf,
Promise,
SafeArrayIterator,
Set,
SymbolToStringTag,
TypeError,
} = window.__bootstrap.primordials;
const opSanitizerDelayResolveQueue = [];
// Even if every resource is closed by the end of a test, there can be a delay
// until the pending ops have all finished. This function returns a promise
// that resolves when it's (probably) fine to run the op sanitizer.
//
// This is implemented by adding a macrotask callback that runs after the
// timer macrotasks, so we can guarantee that a currently running interval
// will have an associated op. An additional `setTimeout` of 0 is needed
// before that, though, in order to give time for worker message ops to finish
// (since timeouts of 0 don't queue tasks in the timer queue immediately).
function opSanitizerDelay() {
return new Promise((resolve) => {
setTimeout(() => {
ArrayPrototypePush(opSanitizerDelayResolveQueue, resolve);
}, 0);
});
}
function handleOpSanitizerDelayMacrotask() {
ArrayPrototypeShift(opSanitizerDelayResolveQueue)?.();
return opSanitizerDelayResolveQueue.length === 0;
}
// An async operation to $0 was started in this test, but never completed. This is often caused by not $1.
// An async operation to $0 was started in this test, but never completed. Async operations should not complete in a test if they were not started in that test.
// deno-fmt-ignore
const OP_DETAILS = {
"op_blob_read_part": ["read from a Blob or File", "awaiting the result of a Blob or File read"],
"op_broadcast_recv": ["receive a message from a BroadcastChannel", "closing the BroadcastChannel"],
"op_broadcast_send": ["send a message to a BroadcastChannel", "closing the BroadcastChannel"],
"op_chmod_async": ["change the permissions of a file", "awaiting the result of a `Deno.chmod` call"],
"op_chown_async": ["change the owner of a file", "awaiting the result of a `Deno.chown` call"],
"op_copy_file_async": ["copy a file", "awaiting the result of a `Deno.copyFile` call"],
"op_crypto_decrypt": ["decrypt data", "awaiting the result of a `crypto.subtle.decrypt` call"],
"op_crypto_derive_bits": ["derive bits from a key", "awaiting the result of a `crypto.subtle.deriveBits` call"],
"op_crypto_encrypt": ["encrypt data", "awaiting the result of a `crypto.subtle.encrypt` call"],
"op_crypto_generate_key": ["generate a key", "awaiting the result of a `crypto.subtle.generateKey` call"],
"op_crypto_sign_key": ["sign data", "awaiting the result of a `crypto.subtle.sign` call"],
"op_crypto_subtle_digest": ["digest data", "awaiting the result of a `crypto.subtle.digest` call"],
"op_crypto_verify_key": ["verify data", "awaiting the result of a `crypto.subtle.verify` call"],
"op_dgram_recv": ["receive a datagram message", "awaiting the result of `Deno.DatagramConn#receive` call, or not breaking out of a for await loop looping over a `Deno.DatagramConn`"],
"op_dgram_send": ["send a datagram message", "awaiting the result of `Deno.DatagramConn#send` call"],
"op_dns_resolve": ["resolve a DNS name", "awaiting the result of a `Deno.resolveDns` call"],
"op_fdatasync_async": ["flush pending data operations for a file to disk", "awaiting the result of a `Deno.fdatasync` call"],
"op_fetch_send": ["send a HTTP request", "awaiting the result of a `fetch` call"],
"op_ffi_call_nonblocking": ["do a non blocking ffi call", "awaiting the returned promise"] ,
"op_ffi_call_ptr_nonblocking": ["do a non blocking ffi call", "awaiting the returned promise"],
"op_flock_async": ["lock a file", "awaiting the result of a `Deno.flock` call"],
"op_fs_events_poll": ["get the next file system event", "breaking out of a for await loop looping over `Deno.FsEvents`"],
"op_fstat_async": ["get file metadata", "awaiting the result of a `Deno.File#fstat` call"],
"op_fsync_async": ["flush pending data operations for a file to disk", "awaiting the result of a `Deno.fsync` call"],
"op_ftruncate_async": ["truncate a file", "awaiting the result of a `Deno.ftruncate` call"],
"op_funlock_async": ["unlock a file", "awaiting the result of a `Deno.funlock` call"],
"op_futime_async": ["change file timestamps", "awaiting the result of a `Deno.futime` call"],
"op_http_accept": ["accept a HTTP request", "closing a `Deno.HttpConn`"],
"op_http_read": ["read the body of a HTTP request", "consuming the entire request body"],
"op_http_shutdown": ["shutdown a HTTP connection", "awaiting `Deno.HttpEvent#respondWith`"],
"op_http_upgrade_websocket": ["upgrade a HTTP connection to a WebSocket", "awaiting `Deno.HttpEvent#respondWith`"],
"op_http_write_headers": ["write HTTP response headers", "awaiting `Deno.HttpEvent#respondWith`"],
"op_http_write": ["write HTTP response body", "awaiting `Deno.HttpEvent#respondWith`"],
"op_link_async": ["create a hard link", "awaiting the result of a `Deno.link` call"],
"op_make_temp_dir_async": ["create a temporary directory", "awaiting the result of a `Deno.makeTempDir` call"],
"op_make_temp_file_async": ["create a temporary file", "awaiting the result of a `Deno.makeTempFile` call"],
"op_message_port_recv_message": ["receive a message from a MessagePort", "awaiting the result of not closing a `MessagePort`"],
"op_mkdir_async": ["create a directory", "awaiting the result of a `Deno.mkdir` call"],
"op_net_accept": ["accept a TCP connection", "closing a `Deno.Listener`"],
"op_net_connect": ["connect to a TCP or UDP server", "awaiting a `Deno.connect` call"],
"op_open_async": ["open a file", "awaiting the result of a `Deno.open` call"],
"op_read_dir_async": ["read a directory", "collecting all items in the async iterable returned from a `Deno.readDir` call"],
"op_read_link_async": ["read a symlink", "awaiting the result of a `Deno.readLink` call"],
"op_realpath_async": ["resolve a path", "awaiting the result of a `Deno.realpath` call"],
"op_remove_async": ["remove a file or directory", "awaiting the result of a `Deno.remove` call"],
"op_rename_async": ["rename a file or directory", "awaiting the result of a `Deno.rename` call"],
"op_run_status": ["get the status of a subprocess", "awaiting the result of a `Deno.Process#status` call"],
"op_seek_async": ["seek in a file", "awaiting the result of a `Deno.File#seek` call"],
"op_signal_poll": ["get the next signal", "un-registering a OS signal handler"],
"op_sleep": ["sleep for a duration", "cancelling a `setTimeout` or `setInterval` call"],
"op_stat_async": ["get file metadata", "awaiting the result of a `Deno.stat` call"],
"op_symlink_async": ["create a symlink", "awaiting the result of a `Deno.symlink` call"],
"op_tls_accept": ["accept a TLS connection", "closing a `Deno.TlsListener`"],
"op_tls_connect": ["connect to a TLS server", "awaiting a `Deno.connectTls` call"],
"op_tls_handshake": ["perform a TLS handshake", "awaiting a `Deno.TlsConn#handshake` call"],
"op_tls_start": ["start a TLS connection", "awaiting a `Deno.startTls` call"],
"op_truncate_async": ["truncate a file", "awaiting the result of a `Deno.truncate` call"],
"op_utime_async": ["change file timestamps", "awaiting the result of a `Deno.utime` call"],
"op_webgpu_buffer_get_map_async": ["map a WebGPU buffer", "awaiting the result of a `GPUBuffer#mapAsync` call"],
"op_webgpu_request_adapter": ["request a WebGPU adapter", "awaiting the result of a `navigator.gpu.requestAdapter` call"],
"op_webgpu_request_device": ["request a WebGPU device", "awaiting the result of a `GPUAdapter#requestDevice` call"],
"op_worker_recv_message": ["receive a message from a web worker", "terminating a `Worker`"],
"op_ws_close": ["close a WebSocket", "awaiting until the `close` event is emitted on a `WebSocket`, or the `WebSocketStream#closed` promise resolves"],
"op_ws_create": ["create a WebSocket", "awaiting until the `open` event is emitted on a `WebSocket`, or the result of a `WebSocketStream#connection` promise"],
"op_ws_next_event": ["receive the next message on a WebSocket", "closing a `WebSocket` or `WebSocketStream`"],
"op_ws_send": ["send a message on a WebSocket", "closing a `WebSocket` or `WebSocketStream`"],
};
// Wrap test function in additional assertion that makes sure
// the test case does not leak async "ops" - ie. number of async
// completed ops after the test is the same as number of dispatched
// ops. Note that "unref" ops are ignored since in nature that are
// optional.
function assertOps(fn) {
/** @param desc {TestDescription | TestStepDescription} */
return async function asyncOpSanitizer(desc) {
const pre = core.metrics();
const preTraces = new Map(core.opCallTraces);
try {
await fn(desc);
} finally {
// Defer until next event loop turn - that way timeouts and intervals
// cleared can actually be removed from resource table, otherwise
// false positives may occur (https://github.com/denoland/deno/issues/4591)
await opSanitizerDelay();
await opSanitizerDelay();
}
if (shouldSkipSanitizers(desc)) return;
const post = core.metrics();
const postTraces = new Map(core.opCallTraces);
// We're checking diff because one might spawn HTTP server in the background
// that will be a pending async op before test starts.
const dispatchedDiff = post.opsDispatchedAsync - pre.opsDispatchedAsync;
const completedDiff = post.opsCompletedAsync - pre.opsCompletedAsync;
if (dispatchedDiff === completedDiff) return;
const details = [];
for (const key in post.ops) {
const preOp = pre.ops[key] ??
{ opsDispatchedAsync: 0, opsCompletedAsync: 0 };
const postOp = post.ops[key];
const dispatchedDiff = postOp.opsDispatchedAsync -
preOp.opsDispatchedAsync;
const completedDiff = postOp.opsCompletedAsync -
preOp.opsCompletedAsync;
if (dispatchedDiff > completedDiff) {
const [name, hint] = OP_DETAILS[key] || [key, null];
const count = dispatchedDiff - completedDiff;
let message = `${count} async operation${
count === 1 ? "" : "s"
} to ${name} ${
count === 1 ? "was" : "were"
} started in this test, but never completed.`;
if (hint) {
message += ` This is often caused by not ${hint}.`;
}
const traces = [];
for (const [id, { opName, stack }] of postTraces) {
if (opName !== key) continue;
if (MapPrototypeHas(preTraces, id)) continue;
ArrayPrototypePush(traces, stack);
}
if (traces.length === 1) {
message += " The operation was started here:\n";
message += traces[0];
} else if (traces.length > 1) {
message += " The operations were started here:\n";
message += ArrayPrototypeJoin(traces, "\n\n");
}
ArrayPrototypePush(details, message);
} else if (dispatchedDiff < completedDiff) {
const [name, hint] = OP_DETAILS[key] || [key, null];
const count = completedDiff - dispatchedDiff;
ArrayPrototypePush(
details,
`${count} async operation${count === 1 ? "" : "s"} to ${name} ${
count === 1 ? "was" : "were"
} started before this test, but ${
count === 1 ? "was" : "were"
} completed during the test. Async operations should not complete in a test if they were not started in that test.
${hint ? `This is often caused by not ${hint}.` : ""}`,
);
}
}
let msg = `Test case is leaking async ops.
- ${ArrayPrototypeJoin(details, "\n - ")}`;
if (!core.isOpCallTracingEnabled()) {
msg +=
`\n\nTo get more details where ops were leaked, run again with --trace-ops flag.`;
} else {
msg += "\n";
}
throw assert(false, msg);
};
}
function prettyResourceNames(name) {
switch (name) {
case "fsFile":
return ["A file", "opened", "closed"];
case "fetchRequest":
return ["A fetch request", "started", "finished"];
case "fetchRequestBody":
return ["A fetch request body", "created", "closed"];
case "fetchResponseBody":
return ["A fetch response body", "created", "consumed"];
case "httpClient":
return ["An HTTP client", "created", "closed"];
case "dynamicLibrary":
return ["A dynamic library", "loaded", "unloaded"];
case "httpConn":
return ["An inbound HTTP connection", "accepted", "closed"];
case "httpStream":
return ["An inbound HTTP request", "accepted", "closed"];
case "tcpStream":
return ["A TCP connection", "opened/accepted", "closed"];
case "unixStream":
return ["A Unix connection", "opened/accepted", "closed"];
case "tlsStream":
return ["A TLS connection", "opened/accepted", "closed"];
case "tlsListener":
return ["A TLS listener", "opened", "closed"];
case "unixListener":
return ["A Unix listener", "opened", "closed"];
case "unixDatagram":
return ["A Unix datagram", "opened", "closed"];
case "tcpListener":
return ["A TCP listener", "opened", "closed"];
case "udpSocket":
return ["A UDP socket", "opened", "closed"];
case "timer":
return ["A timer", "started", "fired/cleared"];
case "textDecoder":
return ["A text decoder", "created", "finished"];
case "messagePort":
return ["A message port", "created", "closed"];
case "webSocketStream":
return ["A WebSocket", "opened", "closed"];
case "fsEvents":
return ["A file system watcher", "created", "closed"];
case "childStdin":
return ["A child process stdin", "opened", "closed"];
case "childStdout":
return ["A child process stdout", "opened", "closed"];
case "childStderr":
return ["A child process stderr", "opened", "closed"];
case "child":
return ["A child process", "started", "closed"];
case "signal":
return ["A signal listener", "created", "fired/cleared"];
case "stdin":
return ["The stdin pipe", "opened", "closed"];
case "stdout":
return ["The stdout pipe", "opened", "closed"];
case "stderr":
return ["The stderr pipe", "opened", "closed"];
case "compression":
return ["A CompressionStream", "created", "closed"];
default:
return [`A "${name}" resource`, "created", "cleaned up"];
}
}
function resourceCloseHint(name) {
switch (name) {
case "fsFile":
return "Close the file handle by calling `file.close()`.";
case "fetchRequest":
return "Await the promise returned from `fetch()` or abort the fetch with an abort signal.";
case "fetchRequestBody":
return "Terminate the request body `ReadableStream` by closing or erroring it.";
case "fetchResponseBody":
return "Consume or close the response body `ReadableStream`, e.g `await resp.text()` or `await resp.body.cancel()`.";
case "httpClient":
return "Close the HTTP client by calling `httpClient.close()`.";
case "dynamicLibrary":
return "Unload the dynamic library by calling `dynamicLibrary.close()`.";
case "httpConn":
return "Close the inbound HTTP connection by calling `httpConn.close()`.";
case "httpStream":
return "Close the inbound HTTP request by responding with `e.respondWith().` or closing the HTTP connection.";
case "tcpStream":
return "Close the TCP connection by calling `tcpConn.close()`.";
case "unixStream":
return "Close the Unix socket connection by calling `unixConn.close()`.";
case "tlsStream":
return "Close the TLS connection by calling `tlsConn.close()`.";
case "tlsListener":
return "Close the TLS listener by calling `tlsListener.close()`.";
case "unixListener":
return "Close the Unix socket listener by calling `unixListener.close()`.";
case "unixDatagram":
return "Close the Unix datagram socket by calling `unixDatagram.close()`.";
case "tcpListener":
return "Close the TCP listener by calling `tcpListener.close()`.";
case "udpSocket":
return "Close the UDP socket by calling `udpSocket.close()`.";
case "timer":
return "Clear the timer by calling `clearInterval` or `clearTimeout`.";
case "textDecoder":
return "Close the text decoder by calling `textDecoder.decode('')` or `await textDecoderStream.readable.cancel()`.";
case "messagePort":
return "Close the message port by calling `messagePort.close()`.";
case "webSocketStream":
return "Close the WebSocket by calling `webSocket.close()`.";
case "fsEvents":
return "Close the file system watcher by calling `watcher.close()`.";
case "childStdin":
return "Close the child process stdin by calling `proc.stdin.close()`.";
case "childStdout":
return "Close the child process stdout by calling `proc.stdout.close()`.";
case "childStderr":
return "Close the child process stderr by calling `proc.stderr.close()`.";
case "child":
return "Close the child process by calling `proc.kill()` or `proc.close()`.";
case "signal":
return "Clear the signal listener by calling `Deno.removeSignalListener`.";
case "stdin":
return "Close the stdin pipe by calling `Deno.stdin.close()`.";
case "stdout":
return "Close the stdout pipe by calling `Deno.stdout.close()`.";
case "stderr":
return "Close the stderr pipe by calling `Deno.stderr.close()`.";
case "compression":
return "Close the compression stream by calling `await stream.writable.close()`.";
default:
return "Close the resource before the end of the test.";
}
}
// Wrap test function in additional assertion that makes sure
// the test case does not "leak" resources - ie. resource table after
// the test has exactly the same contents as before the test.
function assertResources(fn) {
/** @param desc {TestDescription | TestStepDescription} */
return async function resourceSanitizer(desc) {
const pre = core.resources();
await fn(desc);
if (shouldSkipSanitizers(desc)) {
return;
}
const post = core.resources();
const allResources = new Set([
...new SafeArrayIterator(ObjectKeys(pre)),
...new SafeArrayIterator(ObjectKeys(post)),
]);
const details = [];
for (const resource of allResources) {
const preResource = pre[resource];
const postResource = post[resource];
if (preResource === postResource) continue;
if (preResource === undefined) {
const [name, action1, action2] = prettyResourceNames(postResource);
const hint = resourceCloseHint(postResource);
const detail =
`${name} (rid ${resource}) was ${action1} during the test, but not ${action2} during the test. ${hint}`;
ArrayPrototypePush(details, detail);
} else {
const [name, action1, action2] = prettyResourceNames(preResource);
const detail =
`${name} (rid ${resource}) was ${action1} before the test started, but was ${action2} during the test. Do not close resources in a test that were not created during that test.`;
ArrayPrototypePush(details, detail);
}
}
const message = `Test case is leaking ${details.length} resource${
details.length === 1 ? "" : "s"
}:
- ${details.join("\n - ")}
`;
assert(details.length === 0, message);
};
}
// Wrap test function in additional assertion that makes sure
// that the test case does not accidentally exit prematurely.
function assertExit(fn, isTest) {
return async function exitSanitizer(...params) {
setExitHandler((exitCode) => {
assert(
false,
`${
isTest ? "Test case" : "Bench"
} attempted to exit with exit code: ${exitCode}`,
);
});
try {
await fn(...new SafeArrayIterator(params));
} catch (err) {
throw err;
} finally {
setExitHandler(null);
}
};
}
function assertTestStepScopes(fn) {
/** @param desc {TestDescription | TestStepDescription} */
return async function testStepSanitizer(desc) {
preValidation();
// only report waiting after pre-validation
if (canStreamReporting(desc) && "parent" in desc) {
stepReportWait(desc);
}
await fn(MapPrototypeGet(testStates, desc.id).context);
testStepPostValidation(desc);
function preValidation() {
const runningStepDescs = getRunningStepDescs();
const runningStepDescsWithSanitizers = ArrayPrototypeFilter(
runningStepDescs,
(d) => usesSanitizer(d),
);
if (runningStepDescsWithSanitizers.length > 0) {
throw new Error(
"Cannot start test step while another test step with sanitizers is running.\n" +
runningStepDescsWithSanitizers
.map((d) => ` * ${getFullName(d)}`)
.join("\n"),
);
}
if (usesSanitizer(desc) && runningStepDescs.length > 0) {
throw new Error(
"Cannot start test step with sanitizers while another test step is running.\n" +
runningStepDescs.map((d) => ` * ${getFullName(d)}`).join("\n"),
);
}
function getRunningStepDescs() {
const results = [];
let childDesc = desc;
while (childDesc.parent != null) {
const state = MapPrototypeGet(testStates, childDesc.parent.id);
for (const siblingDesc of state.children) {
if (siblingDesc.id == childDesc.id) {
continue;
}
const siblingState = MapPrototypeGet(testStates, siblingDesc.id);
if (!siblingState.finalized) {
ArrayPrototypePush(results, siblingDesc);
}
}
childDesc = childDesc.parent;
}
return results;
}
}
};
}
function testStepPostValidation(desc) {
// check for any running steps
for (const childDesc of MapPrototypeGet(testStates, desc.id).children) {
if (MapPrototypeGet(testStates, childDesc.id).status == "pending") {
throw new Error(
"There were still test steps running after the current scope finished execution. Ensure all steps are awaited (ex. `await t.step(...)`).",
);
}
}
// check if an ancestor already completed
let currentDesc = desc.parent;
while (currentDesc != null) {
if (MapPrototypeGet(testStates, currentDesc.id).finalized) {
throw new Error(
"Parent scope completed before test step finished execution. Ensure all steps are awaited (ex. `await t.step(...)`).",
);
}
currentDesc = currentDesc.parent;
}
}
function pledgePermissions(permissions) {
return ops.op_pledge_test_permissions(
serializePermissions(permissions),
);
}
function restorePermissions(token) {
ops.op_restore_test_permissions(token);
}
function withPermissions(fn, permissions) {
return async function applyPermissions(...params) {
const token = pledgePermissions(permissions);
try {
await fn(...new SafeArrayIterator(params));
} finally {
restorePermissions(token);
}
};
}
/**
* @typedef {{
* id: number,
* name: string,
* fn: TestFunction
* origin: string,
* location: TestLocation,
* filteredOut: boolean,
* ignore: boolean,
* only: boolean.
* sanitizeOps: boolean,
* sanitizeResources: boolean,
* sanitizeExit: boolean,
* permissions: PermissionOptions,
* }} TestDescription
*
* @typedef {{
* id: number,
* name: string,
* fn: TestFunction
* origin: string,
* location: TestLocation,
* ignore: boolean,
* level: number,
* parent: TestDescription | TestStepDescription,
* rootId: number,
* rootName: String,
* sanitizeOps: boolean,
* sanitizeResources: boolean,
* sanitizeExit: boolean,
* }} TestStepDescription
*
* @typedef {{
* context: TestContext,
* children: TestStepDescription[],
* finalized: boolean,
* }} TestState
*
* @typedef {{
* context: TestContext,
* children: TestStepDescription[],
* finalized: boolean,
* status: "pending" | "ok" | ""failed" | ignored",
* error: unknown,
* elapsed: number | null,
* reportedWait: boolean,
* reportedResult: boolean,
* }} TestStepState
*
* @typedef {{
* id: number,
* name: string,
* fn: BenchFunction
* origin: string,
* filteredOut: boolean,
* ignore: boolean,
* only: boolean.
* sanitizeExit: boolean,
* permissions: PermissionOptions,
* }} BenchDescription
*/
/** @type {TestDescription[]} */
const testDescs = [];
/** @type {Map<number, TestState | TestStepState>} */
const testStates = new Map();
/** @type {BenchDescription[]} */
const benchDescs = [];
let isTestSubcommand = false;
let isBenchSubcommand = false;
// Main test function provided by Deno.
function test(
nameOrFnOrOptions,
optionsOrFn,
maybeFn,
) {
if (!isTestSubcommand) {
return;
}
let testDesc;
const defaults = {
ignore: false,
only: false,
sanitizeOps: true,
sanitizeResources: true,
sanitizeExit: true,
permissions: null,
};
if (typeof nameOrFnOrOptions === "string") {
if (!nameOrFnOrOptions) {
throw new TypeError("The test name can't be empty");
}
if (typeof optionsOrFn === "function") {
testDesc = { fn: optionsOrFn, name: nameOrFnOrOptions, ...defaults };
} else {
if (!maybeFn || typeof maybeFn !== "function") {
throw new TypeError("Missing test function");
}
if (optionsOrFn.fn != undefined) {
throw new TypeError(
"Unexpected 'fn' field in options, test function is already provided as the third argument.",
);
}
if (optionsOrFn.name != undefined) {
throw new TypeError(
"Unexpected 'name' field in options, test name is already provided as the first argument.",
);
}
testDesc = {
...defaults,
...optionsOrFn,
fn: maybeFn,
name: nameOrFnOrOptions,
};
}
} else if (typeof nameOrFnOrOptions === "function") {
if (!nameOrFnOrOptions.name) {
throw new TypeError("The test function must have a name");
}
if (optionsOrFn != undefined) {
throw new TypeError("Unexpected second argument to Deno.test()");
}
if (maybeFn != undefined) {
throw new TypeError("Unexpected third argument to Deno.test()");
}
testDesc = {
...defaults,
fn: nameOrFnOrOptions,
name: nameOrFnOrOptions.name,
};
} else {
let fn;
let name;
if (typeof optionsOrFn === "function") {
fn = optionsOrFn;
if (nameOrFnOrOptions.fn != undefined) {
throw new TypeError(
"Unexpected 'fn' field in options, test function is already provided as the second argument.",
);
}
name = nameOrFnOrOptions.name ?? fn.name;
} else {
if (
!nameOrFnOrOptions.fn || typeof nameOrFnOrOptions.fn !== "function"
) {
throw new TypeError(
"Expected 'fn' field in the first argument to be a test function.",
);
}
fn = nameOrFnOrOptions.fn;
name = nameOrFnOrOptions.name ?? fn.name;
}
if (!name) {
throw new TypeError("The test name can't be empty");
}
testDesc = { ...defaults, ...nameOrFnOrOptions, fn, name };
}
// Delete this prop in case the user passed it. It's used to detect steps.
delete testDesc.parent;
testDesc.fn = wrapTestFnWithSanitizers(testDesc.fn, testDesc);
if (testDesc.permissions) {
testDesc.fn = withPermissions(
testDesc.fn,
testDesc.permissions,
);
}
testDesc.origin = getTestOrigin();
const jsError = Deno.core.destructureError(new Error());
testDesc.location = {
fileName: jsError.frames[1].fileName,
lineNumber: jsError.frames[1].lineNumber,
columnNumber: jsError.frames[1].columnNumber,
};
const { id, filteredOut } = ops.op_register_test(testDesc);
testDesc.id = id;
testDesc.filteredOut = filteredOut;
ArrayPrototypePush(testDescs, testDesc);
MapPrototypeSet(testStates, testDesc.id, {
context: createTestContext(testDesc),
children: [],
finalized: false,
});
}
// Main bench function provided by Deno.
function bench(
nameOrFnOrOptions,
optionsOrFn,
maybeFn,
) {
if (!isBenchSubcommand) {
return;
}
ops.op_bench_check_unstable();
let benchDesc;
const defaults = {
ignore: false,
baseline: false,
only: false,
sanitizeExit: true,
permissions: null,
};
if (typeof nameOrFnOrOptions === "string") {
if (!nameOrFnOrOptions) {
throw new TypeError("The bench name can't be empty");
}
if (typeof optionsOrFn === "function") {
benchDesc = { fn: optionsOrFn, name: nameOrFnOrOptions, ...defaults };
} else {
if (!maybeFn || typeof maybeFn !== "function") {
throw new TypeError("Missing bench function");
}
if (optionsOrFn.fn != undefined) {
throw new TypeError(
"Unexpected 'fn' field in options, bench function is already provided as the third argument.",
);
}
if (optionsOrFn.name != undefined) {
throw new TypeError(
"Unexpected 'name' field in options, bench name is already provided as the first argument.",
);
}
benchDesc = {
...defaults,
...optionsOrFn,
fn: maybeFn,
name: nameOrFnOrOptions,
};
}
} else if (typeof nameOrFnOrOptions === "function") {
if (!nameOrFnOrOptions.name) {
throw new TypeError("The bench function must have a name");
}
if (optionsOrFn != undefined) {
throw new TypeError("Unexpected second argument to Deno.bench()");
}
if (maybeFn != undefined) {
throw new TypeError("Unexpected third argument to Deno.bench()");
}
benchDesc = {
...defaults,
fn: nameOrFnOrOptions,
name: nameOrFnOrOptions.name,
};
} else {
let fn;
let name;
if (typeof optionsOrFn === "function") {
fn = optionsOrFn;
if (nameOrFnOrOptions.fn != undefined) {
throw new TypeError(
"Unexpected 'fn' field in options, bench function is already provided as the second argument.",
);
}
name = nameOrFnOrOptions.name ?? fn.name;
} else {
if (
!nameOrFnOrOptions.fn || typeof nameOrFnOrOptions.fn !== "function"
) {
throw new TypeError(
"Expected 'fn' field in the first argument to be a bench function.",
);
}
fn = nameOrFnOrOptions.fn;
name = nameOrFnOrOptions.name ?? fn.name;
}
if (!name) {
throw new TypeError("The bench name can't be empty");
}
benchDesc = { ...defaults, ...nameOrFnOrOptions, fn, name };
}
benchDesc.origin = getBenchOrigin();
const AsyncFunction = (async () => {}).constructor;
benchDesc.async = AsyncFunction === benchDesc.fn.constructor;
const { id, filteredOut } = ops.op_register_bench(benchDesc);
benchDesc.id = id;
benchDesc.filteredOut = filteredOut;
ArrayPrototypePush(benchDescs, benchDesc);
}
async function runTest(desc) {
if (desc.ignore) {
return "ignored";
}
try {
await desc.fn(desc);
const failCount = failedChildStepsCount(desc);
return failCount === 0 ? "ok" : {
"failed": core.destructureError(
new Error(
`${failCount} test step${failCount === 1 ? "" : "s"} failed.`,
),
),
};
} catch (error) {
return {
"failed": core.destructureError(error),
};
} finally {
const state = MapPrototypeGet(testStates, desc.id);
state.finalized = true;
// ensure the children report their result
for (const childDesc of state.children) {
stepReportResult(childDesc);
}
}
}
function compareMeasurements(a, b) {
if (a > b) return 1;
if (a < b) return -1;
return 0;
}
function benchStats(n, highPrecision, avg, min, max, all) {
return {
n,
min,
max,
p75: all[MathCeil(n * (75 / 100)) - 1],
p99: all[MathCeil(n * (99 / 100)) - 1],
p995: all[MathCeil(n * (99.5 / 100)) - 1],
p999: all[MathCeil(n * (99.9 / 100)) - 1],
avg: !highPrecision ? (avg / n) : MathCeil(avg / n),
};
}
async function benchMeasure(timeBudget, desc) {
const fn = desc.fn;
let n = 0;
let avg = 0;
let wavg = 0;
const all = [];
let min = Infinity;
let max = -Infinity;
const lowPrecisionThresholdInNs = 1e4;
// warmup step
let c = 0;
let iterations = 20;
let budget = 10 * 1e6;
if (!desc.async) {
while (budget > 0 || iterations-- > 0) {
const t1 = benchNow();
fn();
const iterationTime = benchNow() - t1;
c++;
wavg += iterationTime;
budget -= iterationTime;
}
} else {
while (budget > 0 || iterations-- > 0) {
const t1 = benchNow();
await fn();
const iterationTime = benchNow() - t1;
c++;
wavg += iterationTime;
budget -= iterationTime;
}
}
wavg /= c;
// measure step
if (wavg > lowPrecisionThresholdInNs) {
let iterations = 10;
let budget = timeBudget * 1e6;
if (!desc.async) {
while (budget > 0 || iterations-- > 0) {
const t1 = benchNow();
fn();
const iterationTime = benchNow() - t1;
n++;
avg += iterationTime;
budget -= iterationTime;
ArrayPrototypePush(all, iterationTime);
if (iterationTime < min) min = iterationTime;
if (iterationTime > max) max = iterationTime;
}
} else {
while (budget > 0 || iterations-- > 0) {
const t1 = benchNow();
await fn();
const iterationTime = benchNow() - t1;
n++;
avg += iterationTime;
budget -= iterationTime;
ArrayPrototypePush(all, iterationTime);
if (iterationTime < min) min = iterationTime;
if (iterationTime > max) max = iterationTime;
}
}
} else {
let iterations = 10;
let budget = timeBudget * 1e6;
if (!desc.async) {
while (budget > 0 || iterations-- > 0) {
const t1 = benchNow();
for (let c = 0; c < lowPrecisionThresholdInNs; c++) fn();
const iterationTime = (benchNow() - t1) / lowPrecisionThresholdInNs;
n++;
avg += iterationTime;
ArrayPrototypePush(all, iterationTime);
if (iterationTime < min) min = iterationTime;
if (iterationTime > max) max = iterationTime;
budget -= iterationTime * lowPrecisionThresholdInNs;
}
} else {
while (budget > 0 || iterations-- > 0) {
const t1 = benchNow();
for (let c = 0; c < lowPrecisionThresholdInNs; c++) await fn();
const iterationTime = (benchNow() - t1) / lowPrecisionThresholdInNs;
n++;
avg += iterationTime;
ArrayPrototypePush(all, iterationTime);
if (iterationTime < min) min = iterationTime;
if (iterationTime > max) max = iterationTime;
budget -= iterationTime * lowPrecisionThresholdInNs;
}
}
}
all.sort(compareMeasurements);
return benchStats(n, wavg > lowPrecisionThresholdInNs, avg, min, max, all);
}
async function runBench(desc) {
let token = null;
try {
if (desc.permissions) {
token = pledgePermissions(desc.permissions);
}
if (desc.sanitizeExit) {
setExitHandler((exitCode) => {
assert(
false,
`Bench attempted to exit with exit code: ${exitCode}`,
);
});
}
const benchTimeInMs = 500;
const stats = await benchMeasure(benchTimeInMs, desc);
return { ok: stats };
} catch (error) {
return { failed: core.destructureError(error) };
} finally {
if (bench.sanitizeExit) setExitHandler(null);
if (token !== null) restorePermissions(token);
}
}
let origin = null;
function getTestOrigin() {
if (origin == null) {
origin = ops.op_get_test_origin();
}
return origin;
}
function getBenchOrigin() {
if (origin == null) {
origin = ops.op_get_bench_origin();
}
return origin;
}
function benchNow() {
return ops.op_bench_now();
}
function enableTest() {
isTestSubcommand = true;
}
function enableBench() {
isBenchSubcommand = true;
}
async function runTests({
shuffle = null,
} = {}) {
core.setMacrotaskCallback(handleOpSanitizerDelayMacrotask);
const origin = getTestOrigin();
const only = ArrayPrototypeFilter(testDescs, (test) => test.only);
const filtered = ArrayPrototypeFilter(
only.length > 0 ? only : testDescs,
(desc) => !desc.filteredOut,
);
ops.op_dispatch_test_event({
plan: {
origin,
total: filtered.length,
filteredOut: testDescs.length - filtered.length,
usedOnly: only.length > 0,
},
});
if (shuffle !== null) {
// http://en.wikipedia.org/wiki/Linear_congruential_generator
// Use BigInt for everything because the random seed is u64.
const nextInt = (function (state) {
const m = 0x80000000n;
const a = 1103515245n;
const c = 12345n;
return function (max) {
return state = ((a * state + c) % m) % BigInt(max);
};
}(BigInt(shuffle)));
for (let i = filtered.length - 1; i > 0; i--) {
const j = nextInt(i);
[filtered[i], filtered[j]] = [filtered[j], filtered[i]];
}
}
for (const desc of filtered) {
ops.op_dispatch_test_event({ wait: desc.id });
const earlier = DateNow();
const result = await runTest(desc);
const elapsed = DateNow() - earlier;
ops.op_dispatch_test_event({
result: [desc.id, result, elapsed],
});
}
}
async function runBenchmarks() {
core.setMacrotaskCallback(handleOpSanitizerDelayMacrotask);
const origin = getBenchOrigin();
const originalConsole = globalThis.console;
globalThis.console = new Console((s) => {
ops.op_dispatch_bench_event({ output: s });
});
const only = ArrayPrototypeFilter(benchDescs, (bench) => bench.only);
const filtered = ArrayPrototypeFilter(
only.length > 0 ? only : benchDescs,
(desc) => !desc.filteredOut && !desc.ignore,
);
let groups = new Set();
// make sure ungrouped benchmarks are placed above grouped
groups.add(undefined);
for (const desc of filtered) {
desc.group ||= undefined;
groups.add(desc.group);
}
groups = ArrayFrom(groups);
ArrayPrototypeSort(
filtered,
(a, b) => groups.indexOf(a.group) - groups.indexOf(b.group),
);
ops.op_dispatch_bench_event({
plan: {
origin,
total: filtered.length,
usedOnly: only.length > 0,
names: ArrayPrototypeMap(filtered, (desc) => desc.name),
},
});
for (const desc of filtered) {
desc.baseline = !!desc.baseline;
ops.op_dispatch_bench_event({ wait: desc.id });
ops.op_dispatch_bench_event({
result: [desc.id, await runBench(desc)],
});
}
globalThis.console = originalConsole;
}
function getFullName(desc) {
if ("parent" in desc) {
return `${desc.parent.name} > ${desc.name}`;
}
return desc.name;
}
function usesSanitizer(desc) {
return desc.sanitizeResources || desc.sanitizeOps || desc.sanitizeExit;
}
function canStreamReporting(desc) {
let currentDesc = desc;
while (currentDesc != null) {
if (!usesSanitizer(currentDesc)) {
return false;
}
currentDesc = currentDesc.parent;
}
for (const childDesc of MapPrototypeGet(testStates, desc.id).children) {
const state = MapPrototypeGet(testStates, childDesc.id);
if (!usesSanitizer(childDesc) && !state.finalized) {
return false;
}
}
return true;
}
function stepReportWait(desc) {
const state = MapPrototypeGet(testStates, desc.id);
if (state.reportedWait) {
return;
}
ops.op_dispatch_test_event({ stepWait: desc.id });
state.reportedWait = true;
}
function stepReportResult(desc) {
const state = MapPrototypeGet(testStates, desc.id);
if (state.reportedResult) {
return;
}
stepReportWait(desc);
for (const childDesc of state.children) {
stepReportResult(childDesc);
}
let result;
if (state.status == "pending" || state.status == "failed") {
result = {
[state.status]: state.error && core.destructureError(state.error),
};
} else {
result = state.status;
}
ops.op_dispatch_test_event({
stepResult: [desc.id, result, state.elapsed],
});
state.reportedResult = true;
}
function failedChildStepsCount(desc) {
return ArrayPrototypeFilter(
MapPrototypeGet(testStates, desc.id).children,
(d) => MapPrototypeGet(testStates, d.id).status === "failed",
).length;
}
/** If a test validation error already occurred then don't bother checking
* the sanitizers as that will create extra noise.
*/
function shouldSkipSanitizers(desc) {
try {
testStepPostValidation(desc);
return false;
} catch {
return true;
}
}
/** @param desc {TestDescription | TestStepDescription} */
function createTestContext(desc) {
let parent;
let level;
let rootId;
let rootName;
if ("parent" in desc) {
parent = MapPrototypeGet(testStates, desc.parent.id).context;
level = desc.level;
rootId = desc.rootId;
rootName = desc.rootName;
} else {
parent = undefined;
level = 0;
rootId = desc.id;
rootName = desc.name;
}
return {
[SymbolToStringTag]: "TestContext",
/**
* The current test name.
*/
name: desc.name,
/**
* Parent test context.
*/
parent,
/**
* File Uri of the test code.
*/
origin: desc.origin,
/**
* @param nameOrTestDefinition {string | TestStepDefinition}
* @param fn {(t: TestContext) => void | Promise<void>}
*/
async step(nameOrTestDefinition, fn) {
if (MapPrototypeGet(testStates, desc.id).finalized) {
throw new Error(
"Cannot run test step after parent scope has finished execution. " +
"Ensure any `.step(...)` calls are executed before their parent scope completes execution.",
);
}
let stepDesc;
if (typeof nameOrTestDefinition === "string") {
if (!(ObjectPrototypeIsPrototypeOf(FunctionPrototype, fn))) {
throw new TypeError("Expected function for second argument.");
}
stepDesc = {
name: nameOrTestDefinition,
fn,
};
} else if (typeof nameOrTestDefinition === "object") {
stepDesc = nameOrTestDefinition;
} else {
throw new TypeError(
"Expected a test definition or name and function.",
);
}
stepDesc.ignore ??= false;
stepDesc.sanitizeOps ??= desc.sanitizeOps;
stepDesc.sanitizeResources ??= desc.sanitizeResources;
stepDesc.sanitizeExit ??= desc.sanitizeExit;
stepDesc.origin = getTestOrigin();
const jsError = Deno.core.destructureError(new Error());
stepDesc.location = {
fileName: jsError.frames[1].fileName,
lineNumber: jsError.frames[1].lineNumber,
columnNumber: jsError.frames[1].columnNumber,
};
stepDesc.level = level + 1;
stepDesc.parent = desc;
stepDesc.rootId = rootId;
stepDesc.rootName = rootName;
const { id } = ops.op_register_test_step(stepDesc);
stepDesc.id = id;
const state = {
context: createTestContext(stepDesc),
children: [],
finalized: false,
status: "pending",
error: null,
elapsed: null,
reportedWait: false,
reportedResult: false,
};
MapPrototypeSet(testStates, stepDesc.id, state);
ArrayPrototypePush(
MapPrototypeGet(testStates, stepDesc.parent.id).children,
stepDesc,
);
try {
if (stepDesc.ignore) {
state.status = "ignored";
state.finalized = true;
if (canStreamReporting(stepDesc)) {
stepReportResult(stepDesc);
}
return false;
}
const testFn = wrapTestFnWithSanitizers(stepDesc.fn, stepDesc);
const start = DateNow();
try {
await testFn(stepDesc);
if (failedChildStepsCount(stepDesc) > 0) {
state.status = "failed";
} else {
state.status = "ok";
}
} catch (error) {
state.error = error;
state.status = "failed";
}
state.elapsed = DateNow() - start;
if (MapPrototypeGet(testStates, stepDesc.parent.id).finalized) {
// always point this test out as one that was still running
// if the parent step finalized
state.status = "pending";
}
state.finalized = true;
if (state.reportedWait && canStreamReporting(stepDesc)) {
stepReportResult(stepDesc);
}
return state.status === "ok";
} finally {
if (canStreamReporting(stepDesc.parent)) {
const parentState = MapPrototypeGet(testStates, stepDesc.parent.id);
// flush any buffered steps
for (const childDesc of parentState.children) {
stepReportResult(childDesc);
}
}
}
},
};
}
/**
* @template T {Function}
* @param testFn {T}
* @param opts {{
* sanitizeOps: boolean,
* sanitizeResources: boolean,
* sanitizeExit: boolean,
* }}
* @returns {T}
*/
function wrapTestFnWithSanitizers(testFn, opts) {
testFn = assertTestStepScopes(testFn);
if (opts.sanitizeOps) {
testFn = assertOps(testFn);
}
if (opts.sanitizeResources) {
testFn = assertResources(testFn);
}
if (opts.sanitizeExit) {
testFn = assertExit(testFn, true);
}
return testFn;
}
window.__bootstrap.testing = {
bench,
enableBench,
enableTest,
runBenchmarks,
runTests,
test,
};
})(this);