This PR removes the use of the custom `utc_now` function in favor of the
`chrono` implementation. It resolves #22864.
---------
Co-authored-by: Bartek Iwańczuk <biwanczuk@gmail.com>
If `@@asyncIterator` is `null` or `undefined`, it should ignores and
fallback to `@@iterator`.
Tests have been merged into WPT.
https://github.com/web-platform-tests/wpt/pull/46374
The proposal of `ReadableStream.from` uses TC39 [GetIterator][] and
[GetMethod][] within it.
GetMethod treats null as undefined.
So if `@@asyncIterator` is `null` it should be ignored and fallback to
`@@iterator`.
[GetIterator]: https://tc39.es/ecma262/#sec-getiterator
[GetMethod]: https://tc39.es/ecma262/#sec-getmethod
```bash
> deno eval "ReadableStream.from({ [Symbol.asyncIterator]: null, [Symbol.iterator]: () => ({ next: () => ({ done: true }) }) }).pipeTo(new WritableStream())"
error: Uncaught (in promise) TypeError: obj[SymbolAsyncIterator] is not a function
ReadableStream.from({ [Symbol.asyncIterator]: null, [Symbol.iterator]: () => ({ next: () => ({ done: true }) }) }).pipeTo(new WritableStream())
^
at getIterator (ext:deno_web/06_streams.js:5105:38)
at Function.from (ext:deno_web/06_streams.js:5207:22)
at file:///D:/work/js/deno/tests/wpt/suite/$deno$eval:1:16
```
---------
Co-authored-by: Asher Gomez <ashersaupingomez@gmail.com>
This is a primordialization effort to improve resistance against users
tampering with the global `Object` prototype.
---------
Co-authored-by: Bartek Iwańczuk <biwanczuk@gmail.com>
Currently `task::task_npx_non_existent` is consistently failing in CI
([example](https://github.com/denoland/deno/actions/runs/9192958846/job/25282900321#step:43:2772))
due to the output changing slightly
```
-- OUTPUT START --
Task non-existent npx this-command-should-not-exist-for-you
npm ERR! code E404
npm ERR! 404 Not Found - GET http://localhost:4260/this-command-should-not-exist-for-you
npm ERR! 404
npm ERR! 404 'this-command-should-not-exist-for-you@*' is not in this registry.
npm ERR! 404
npm ERR! 404 Note that you can also install from a
npm ERR! 404 tarball, folder, http url, or git url.
npm ERR! A complete log of this run can be found in: /Users/runner/.npm/_logs/2024-05-22T17_58_42_473Z-debug-0.log
-- OUTPUT END --
-- EXPECTED START --
Task non-existent npx this-command-should-not-exist-for-you
npm error code E404
npm error 404 Not Found - GET http://localhost:4260/this-command-should-not-exist-for-you
[WILDCARD]
-- EXPECTED END --
```
I'm not sure what changed in CI to cause this (and I can't repro it
locally, even matching the version of npm and node on the github
runners), but fix it with more lenient expected output for that test.
By default, uses a 60 second timeout, backing off 2x each time (can be
overridden using the hidden `DENO_SLOW_TEST_TIMEOUT` which we implement
only really for spec testing.
```
Deno.test(async function test() {
await new Promise(r => setTimeout(r, 130_000));
});
```
```
$ target/debug/deno test /tmp/test_slow.ts
Check file:///tmp/test_slow.ts
running 1 test from ../../../../../../tmp/test_slow.ts
test ...'test' is running very slowly (1m0s)
'test' is running very slowly (2m0s)
ok (2m10s)
ok | 1 passed | 0 failed (2m10s)
```
---------
Signed-off-by: Matt Mastracci <matthew@mastracci.com>
Co-authored-by: Bartek Iwańczuk <biwanczuk@gmail.com>
This brings in [`runtimelib`](https://github.com/runtimed/runtimed) to
use:
## Fully typed structs for Jupyter Messages
```rust
let msg = connection.read().await?;
self
.send_iopub(
runtimelib::Status::busy().as_child_of(msg),
)
.await?;
```
## Jupyter paths
Jupyter paths are implemented in Rust, allowing the Deno kernel to be
installed completely via Deno without a requirement on Python or
Jupyter. Deno users will be able to install and use the kernel with just
VS Code or other editors that support Jupyter.
```rust
pub fn status() -> Result<(), AnyError> {
let user_data_dir = user_data_dir()?;
let kernel_spec_dir_path = user_data_dir.join("kernels").join("deno");
let kernel_spec_path = kernel_spec_dir_path.join("kernel.json");
if kernel_spec_path.exists() {
log::info!("✅ Deno kernel already installed");
Ok(())
} else {
log::warn!("ℹ️ Deno kernel is not yet installed, run `deno jupyter --install` to set it up");
Ok(())
}
}
```
Closes https://github.com/denoland/deno/issues/21619
This stubs `findSourceMap` in `node:module` by always returning
`undefined` as if it never found a source map. This unblocks the `ava`
test runner.
Fixes https://github.com/denoland/deno/issues/18666
Some npm libraries like `signal-exit` rely on the length of the listener
array returned by `process.listeners("SIGNT")` to be correct to
function. We weren't tracking `SIG*` events there, which broke those npm
libraries.
Fixes https://github.com/denoland/deno/issues/22892
the last commit had a regression, where it removed this branch, I
haven't tested the code but I think it should work
---------
Signed-off-by: Bedis Nbiba <bedisnbiba@gmail.com>
Popular test runners like Jest instantiate a new `Process` object
themselves and expect the class constructor to be callable without the
`new` keyword. This PR refactors our `Process` class implementation from
a proper ES2015 class to an ES5-style class which can be invoked both
with and without the `new` keyword like in Node.
Fixes https://github.com/denoland/deno/issues/23863
Construct a new module graph container for workers instead of sharing it
with the main worker.
Fixes #17248
Fixes #23461
---------
Co-authored-by: David Sherret <dsherret@gmail.com>
The stderr stream from the LSP is consumed by a separate thread, so it
may not have processed the part we care about yet. Instead, wait until
you see the measure for the request you care about.
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Fixes https://github.com/denoland/deno/issues/23801
---------
Signed-off-by: Marvin Hagemeister <marvinhagemeister50@gmail.com>
Co-authored-by: Bartek Iwańczuk <biwanczuk@gmail.com>
VScode will typically send a `textDocument/semanticTokens/full` request
followed by `textDocument/semanticTokens/range`, and occassionally
request semantic tokens even when we know nothing has changed. Semantic
tokens also get refreshed on each change. Computing semantic tokens is
relatively heavy in TSC, so we should avoid it as much as possible.
Caches the semantic tokens for open documents, to avoid making TSC do
unnecessary work. Results in a noticeable improvement in local
benchmarking
before:
```
Starting Deno benchmark
-> Start benchmarking lsp
- Simple Startup/Shutdown
(10 runs, mean: 383ms)
- Big Document/Several Edits
(5 runs, mean: 1079ms)
- Find/Replace
(10 runs, mean: 59ms)
- Code Lens
(10 runs, mean: 440ms)
- deco-cx/apps Multiple Edits + Navigation
(5 runs, mean: 9921ms)
<- End benchmarking lsp
```
after:
```
Starting Deno benchmark
-> Start benchmarking lsp
- Simple Startup/Shutdown
(10 runs, mean: 395ms)
- Big Document/Several Edits
(5 runs, mean: 1024ms)
- Find/Replace
(10 runs, mean: 56ms)
- Code Lens
(10 runs, mean: 438ms)
- deco-cx/apps Multiple Edits + Navigation
(5 runs, mean: 8927ms)
<- End benchmarking lsp
```
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Fixes https://github.com/denoland/deno/issues/23397
This PR directly addresses the issue raised in #23282 where Deno panics
if `deno coverage` is called with `--include` regex that returns no
matches.
I've opted not to change the return value of `collect_summary` for
simplicity and return an empty `HashMap` instead
Precursor to #23236
This implements the SNI features, but uses private symbols to avoid
exposing the functionality at this time. Note that to properly test this
feature, we need to add a way for `connectTls` to specify a hostname.
This is something that should be pushed into that API at a later time as
well.
```ts
Deno.test(
{ permissions: { net: true, read: true } },
async function listenResolver() {
let sniRequests = [];
const listener = Deno.listenTls({
hostname: "localhost",
port: 0,
[resolverSymbol]: (sni: string) => {
sniRequests.push(sni);
return {
cert,
key,
};
},
});
{
const conn = await Deno.connectTls({
hostname: "localhost",
[serverNameSymbol]: "server-1",
port: listener.addr.port,
});
const [_handshake, serverConn] = await Promise.all([
conn.handshake(),
listener.accept(),
]);
conn.close();
serverConn.close();
}
{
const conn = await Deno.connectTls({
hostname: "localhost",
[serverNameSymbol]: "server-2",
port: listener.addr.port,
});
const [_handshake, serverConn] = await Promise.all([
conn.handshake(),
listener.accept(),
]);
conn.close();
serverConn.close();
}
assertEquals(sniRequests, ["server-1", "server-2"]);
listener.close();
},
);
```
---------
Signed-off-by: Matt Mastracci <matthew@mastracci.com>
Moves sloppy import resolution from the loader to the resolver.
Also adds some test helper functions to make the lsp tests less verbose
---------
Co-authored-by: David Sherret <dsherret@gmail.com>
1. Generally we should prefer to use the `log` crate.
2. I very often accidentally commit `eprintln`s.
When we should use `println` or `eprintln`, it's not too bad to be a bit
more verbose and ignore the lint rule.
This PR implements the changes we plan to make to `deno install` in deno
2.0.
- `deno install` without arguments caches dependencies from
`package.json` / `deno.json` and sets up the `node_modules` folder
- `deno install <pkg>` adds the package to the config file (either
`package.json` or `deno.json`), i.e. it aliases `deno add`
- `deno add` can also add deps to `package.json` (this is gated behind
`DENO_FUTURE` due to uncertainty around handling projects with both
`deno.json` and `package.json`)
- `deno install -g <bin>` installs a package as a globally available
binary (the same as `deno install <bin>` in 1.0)
---------
Co-authored-by: Nathan Whitaker <nathan@deno.com>
Fixes the `Debug Failure` errors described in
https://github.com/denoland/deno/issues/23643#issuecomment-2094552765 .
The issue here was that we were passing diagnostic codes as strings but
TSC expects the codes to be numbers. This resulted in some quick fixes
not working (as illustrated by the test added here which fails before
this PR).
The first commit is the actual fix. The rest are just test related.
A bunch of small things, mostly around timing and making sure the
jupyter kernel is actually running and ready to respond to requests. I
reproduced the flakiness by running a script to run a bunch of instances
of the test in parallel, where I could get failures consistently. After
this PR, I can't reproduce the flakiness locally which hopefully means
that applies to CI as well
Allows writing named sub-tests. These are:
1. Filterable on the command line via `cargo test ...`
2. Run in parallel
3. Use a fresh temp and deno dir for each test (unlike steps)
This commit updates our testing npm registry to handle
additional `@denotest2` scope in addition to `@denotest`
scope. I might have to update it further in the future to handle
additional scopes, but it's good enough for now.
Part of #22607 (probably closes it, but I haven't done thorough testing)
Makes it so that `require.resolve` with `paths` specified will fallback
to using the global cache when the paths can't be found when using a
global cache (not when using a node_modules folder)
This correctly creates the `AbortSignal` regardless of when we request
it. If the signal is requested after the request has completed, the
signal is created in the aborted state.
Using GC counts, we can see a reduction in object creation:
This PR: 440
deno 1.42.4: 1650
deno 1.43.0+b02ffec: 874
This PR adds private `[REF]()` and `[UNREF]()` methods to Stdin class,
and call them from Node.js polyfill layer (`TTY` class). This enables
`process.stdin.unref()` and `process.stdin.ref()` for the case when
stdin is terminal.
closes #21796
By default, `deno serve` will assign port 8000 (like `Deno.serve`).
Users may choose a different port using `--port`.
`deno serve /tmp/file.ts`
`server.ts`:
```ts
export default {
fetch(req) {
return new Response("hello world!\n");
},
};
```
When the response has been successfully send, we abort the
`Request.signal` property to indicate that all resources associated with
this transaction may be torn down.
Most common argument to `env` option for `worker_threads.Worker` will be
`process.env`.
In Deno `process.env` is a `Proxy` which can't be cloned using
structured clone algorithm.
So to be safe, I'm creating a copy of actual object before it's sent to
the worker thread.
Ref #23522
This commit adds a "private npm registry" to the test server. This
registry requires to send an appropriate Authorization header.
Towards https://github.com/denoland/deno/issues/16105
This commit changes the workspace support to provide all workspace
members to be available as imports based on their names and versions.
Closes https://github.com/denoland/deno/issues/23343
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This PR wires up a new `jsxPrecompileSkipElements` option in
`compilerOptions` that can be used to exempt a list of elements from
being precompiled with the `precompile` JSX transform.
The actual handling of `$projectChanged` is quick, but JS requests are
not. The cleared caches only get repopulated on the next actual request,
so just batch the change notification in with the next actual request.
No significant difference in benchmarks on my machine, but this speeds
up `did_change` handling and reduces our total number of JS requests (in
addition to coalescing multiple JS change notifs into one).
Embedders may have special requirements around file opening, so we add a
new `check_open` permission check that is called as part of the file
open process.
Adds an `addr` field to `HttpServer` to simplify the pattern
`Deno.serve({ onListen({ port } => listenPort = port })`. This becomes:
`const server = Deno.serve({}); port = server.addr.port`.
Changes:
- Refactors `serve` overloads to split TLS out (in preparation for
landing a place for the TLS SNI information)
- Adds an `addr` field to `HttpServer` that matches the `addr` field of
the corresponding `Deno.Listener`s.
It's not clear to me how these tests worked correctly on CI,
but they were failing hard locally because of two problems:
- missing env var that tests URL for fake npm registry
- trying to run a directory that contains native Node.js tests that
require a special harness
Landing work from #21903, plus fixing a node compat bug.
We were always sending the HTTP/2 ALPN on TLS connections which might
confuse upstream servers.
Changes:
- Configure HTTP/2 ALPN when making the TLS connection from the HTTP/2
code
- Read the `ALPNProtocols` property from the TLS connection options
rather than the deno `alpnProtocols` field
- Add tests
Prereq for landing Deno.serveHttp on Deno.serve: removing older HTTP
servers from the codebase.
This PR enables V8 code cache for ES modules and for `require` scripts
through `op_eval_context`. Code cache artifacts are transparently stored
and fetched using sqlite db and are passed to V8. `--no-code-cache` can
be used to disable.
---------
Co-authored-by: Bartek Iwańczuk <biwanczuk@gmail.com>
It's best that this only gets merged with the latest version of the
suite, so there's little difference between the `ci` and `wpt_epoch`
workflows. This should make troubleshooting easier.
This allows people to use imports like:
```ts
import "./app.css";
```
...with `deno check` in systems where there's a bundle step (ex. Vite).
This will still error when using it with `deno run` or if the referenced
file does not exist.
See test cases for behaviour.
This PR adds a benchmark intended to measure how the LSP handles larger
repos, as well as its performance on a more realistic workload.
The repo being benchmarked is
[deco-cx/apps](https://github.com/deco-cx/apps) which has been vendored
along with its dependencies. It's included as a git submodule as its
fairly large. The LSP requests used in the benchmark are the actual
requests sent by VSCode as I opened, modified, and navigated around a
file (to simulate an actual user interaction).
The main motivation is to have a more realistic benchmark that measures
how we do with a large number of files and dependencies. The
improvements made from 1.42 to 1.42.3 mostly improved performance with
larger repos, so none of our existing benchmarks showed an improvement.
Here are the results for the changes made from 1.42 to 1.42.3 (the new
benchmark is the last one listed):
**1.42.0**
```test
Starting Deno benchmark
-> Start benchmarking lsp
- Simple Startup/Shutdown
(10 runs, mean: 379ms)
- Big Document/Several Edits
(5 runs, mean: 1142ms)
- Find/Replace
(10 runs, mean: 51ms)
- Code Lens
(10 runs, mean: 443ms)
- deco-cx/apps Multiple Edits + Navigation
(5 runs, mean: 25121ms)
<- End benchmarking lsp
```
**1.42.3**
```text
Starting Deno benchmark
-> Start benchmarking lsp
- Simple Startup/Shutdown
(10 runs, mean: 383ms)
- Big Document/Several Edits
(5 runs, mean: 1135ms)
- Find/Replace
(10 runs, mean: 55ms)
- Code Lens
(10 runs, mean: 440ms)
- deco-cx/apps Multiple Edits + Navigation
(5 runs, mean: 11675ms)
<- End benchmarking lsp
```
Closes https://github.com/denoland/deno/issues/23362
Previously we were panicking if there was a pending read on a
port and `receiveMessageOnPort` was called. This is now fixed
by cancelling the pending read, trying to read a message and
resuming reading in a loop.
…faces (#23296)"
This reverts commit e190acbfa8.
Reverting because it broke stable API type declarations. We will reland
it for v1.43 with updated interfaces
Currently we evict a lot of the caches on the JS side of things on every
request, namely script versions, script file names, and compiler
settings (as of #23283, it's not quite every request but it's still
unnecessarily often).
This PR reports changes to the JS side, so that it can evict exactly the
caches that it needs too. We might want to do some batching in the
future so as not to do 1 request per change.
Removes the certificate options from all the interfaces and replaces
them with a new `TlsCertifiedKeyOptions`. This allows us to centralize
the documentation for TLS key management for both client and server, and
will allow us to add key object support in the future.
Also adds an option `keyFormat` field to the cert/key that must be
omitted or set to `pem`. This will allow us to load other format keys in
the future `der`, `pfx`, etc.
In a future PR, we will add a way to load a certified key object, and we
will add another option to `TlsCertifiedKeyOptions` like so:
```ts
export interface TlsCertifiedKeyOptions =
| TlsCertifiedKeyPem
| TlsCertifiedKeyFromFile
| TlsCertifiedKeyConnectTls
| { key: Deno.CertifiedKey }
```
Changes:
- Implements a TCP socket listener that will allow for round-robin
load-balancing in-process.
- Cleans up the raw networking code to make it easier to work with.
This PR follows this fix (https://github.com/nodejs/node/pull/52005) in
Node.js.
Stream's construct callback happens one tick earlier by this change, and
it prevents the reordering of the first few chunks in
`node:stream.Writable`
closes #20284
I'm unsure whether we're planning to make the `Deno.FsFile` constructor
illegal or remove `FsFile` from the `Deno.*` namspace in Deno 2. Either
way, this PR works towards the former. I'll create a superceding PR if
the latter is planned instead.
Towards #23089
This functionality was broken. The series of events was:
1. Load the npm resolution from the lockfile.
2. Discover only a subset of the specifiers in the documents.
3. Clear the npm snapshot.
4. Redo npm resolution with the new specifiers (~500ms).
What this now does:
1. Load the npm resolution from the lockfile.
2. Discover only a subset of the specifiers in the documents and take
into account the specifiers from the lockfile.
3. Do not redo resolution (~1ms).
MessagePort if directly assigned to workerData property instead of
embedding it in an object then it is not patched to a NodeMessagePort.
This commit fixes the bug.
To avoid the risk of port collisions during tests, we listen on port 0
and use that for both ends of the connections (for any tests we run in
this file).
Fixes #23179.
Fixes #22454.
Enables passing `{tokens: true}` to `parseArgs` and setting default
values for options.
With this PR, the observable framework works with deno out of the box
(no unstable flags needed).
The existing code was basically copied straight from node, so this PR
mostly just updates that (out of date) vendored code. Also fixes some
issues with error exports (before this PR, in certain error cases we
were attempting to construct error classes that weren't actually in
scope).
The last change (in the second commit) adds a small hack so that we
actually exercise the `test-parse-args.js` node_compat test, previously
it was reported as passing though it should have failed. That test now
passes.
---------
Co-authored-by: Bartek Iwańczuk <biwanczuk@gmail.com>
When `DENO_FUTURE=1` env var is present, then BYONM
("bring your own node_modules") is enabled by default.
That means that is there's a `package.json` present, users
are expected to explicitly install dependencies from that file.
Towards https://github.com/denoland/deno/issues/23151
The `tools/node_compat/node` submodule has been moved to
`tests/node_compat/runner/suite` and the remaining files within
`tools/node_compat` to `tests/node_compat/runner`.
Most of the changes are of the header within `tests/node_compat/test`
files. The `setup` and `test` tasks within `tests/node_comapt` execute
successfully.
Towards #22525
CC @mmastrac
The permission prompt doesn't wait for quiescent input, so someone
pasting a large text file into the console may end up losing the prompt.
We enforce a minimum human delay and wait for a 100ms quiescent period
before we write and accept prompt input to avoid this problem.
This does require adding a human delay in all prompt tests, but that's
pretty straightforward. I rewrote the locked stdout/stderr test while I
was in here.
Unused locals and parameters don't make sense to surface in remote
modules. Additionally, fast check can cause these kind of diagnostics
when publishing, so they should be ignored.
Closes #22959
There's a TOCTOU issue that can happen when selecting unused ports for
the server to use (we get assigned an unused port by the OS, and between
then and when the server actually binds to the port another test steals
it). Improve this by checking if the server existed soon after setup,
and if so we retry starting it. Client connection can also fail
spuriously (in local testing) so added a retry mechanism.
This also fixes a hang, where if the server exited (almost always due to
the issue described above) before we connected to it, attempting to
connect our client ZMQ sockets to it would just hang. To resolve this, I
added a timeout so we can't wait forever.
This PR introduces the ability to exclude certain paths from the file watcher
in Deno. This is particularly useful when running scripts in watch mode,
as it allows developers to prevent unnecessary restarts when changes are
made to files that do not affect the running script, or when executing
scripts that generate new files which results in an infinite restart
loop.
---------
Co-authored-by: David Sherret <dsherret@gmail.com>
In preparation for upcoming changes to `deno install` in Deno 2.
If `-g` or `--global` flag is not provided a warning will be emitted:
```
⚠️ `deno install` behavior will change in Deno 2. To preserve the current behavior use `-g` or `--global` flag.
```
The same will happen for `deno uninstall` - unless `-g`/`--global` flag
is provided
a warning will be emitted.
Towards https://github.com/denoland/deno/issues/23062
---------
Signed-off-by: Bartek Iwańczuk <biwanczuk@gmail.com>
Co-authored-by: David Sherret <dsherret@users.noreply.github.com>
This commit changes "deno init" subcommand to use "jsr:" specifier for
standard library "assert" module. It is unversioned, but we will change
it to `@^1` once `@std/assert` release version 1.0.
This allows us to start decoupling `deno` and `deno_std` release. The
release scripts have been updated to take that into account.
Fixes #23053.
Two small bugs here:
- the existing condition for printing out the group header was broken.
it worked in the reproducer (in the issue above) without filtering only
by accident, due to setting `self.has_ungrouped = true` once we see the
warmup bench. Knowing that we sort benchmarks to put ungrouped benches
first, there are only two cases: 1) we are starting the first group 2)
we are ending the previous group and starting a new group
- when you passed `--filter` we were applying that filter to the warmup
bench (which is not visible to users), so we suffered from jit bias if
you were filtering (unless your filter was `<warmup>`)
TLDR;
Running
```bash
deno bench main.js --filter="G"
```
```js
// main.js
Deno.bench({
group: "G1",
name: "G1-A",
fn() {},
});
Deno.bench({
group: "G1",
name: "G1-B",
fn() {},
});
```
Before this PR:
```
benchmark time (avg) iter/s (min … max) p75 p99 p995
--------------------------------------------------------------- -----------------------------
G1-A 303.52 ps/iter3,294,726,102.1 (254.2 ps … 7.8 ns) 287.5 ps 391.7 ps 437.5 ps
G1-B 3.8 ns/iter 263,360,635.9 (2.24 ns … 8.36 ns) 3.84 ns 4.73 ns 4.94 ns
summary
G1-A
12.51x faster than G1-B
```
After this PR:
```
benchmark time (avg) iter/s (min … max) p75 p99 p995
--------------------------------------------------------------- -----------------------------
group G1
G1-A 3.85 ns/iter 259,822,096.0 (2.42 ns … 9.03 ns) 3.83 ns 4.62 ns 4.83 ns
G1-B 3.84 ns/iter 260,458,274.5 (3.55 ns … 7.05 ns) 3.83 ns 4.45 ns 4.7 ns
summary
G1-B
1x faster than G1-A
```
This change removes deprecated methods from the `Deno.*` namespace when
the `DENO_FUTURE=1` environment variable is used.
Note: this does not address deprecated class properties and methods.
E.g. `Deno.Conn.rid`.
Before this PR, we didn't have any integration tests set up for the
`jupyter` subcommand.
This PR adds a basic jupyter client and helpers for writing integration
tests for the jupyter kernel. A lot of the code here is boilerplate,
mainly around the message format for jupyter.
This also adds a few basic integration tests, most notably for
requesting execution of a snippet of code and getting the correct
results.
This patch gets JUnit reporter to output more detailed information for
test steps (subtests).
## Issue with previous implementation
In the previous implementation, the test hierarchy was represented using
several XML tags like the following:
- `<testsuites>` corresponds to the entire test (one execution of `deno
test` has exactly one `<testsuites>` tag)
- `<testsuite>` corresponds to one file, such as `main_test.ts`
- `<testcase>` corresponds to one `Deno.test(...)`
- `<property>` corresponds to one `t.step(...)`
This structure describes the test layers but one problem is that
`<property>` tag is used for any use cases so some tools that can ingest
a JUnit XML file might not be able to interpret `<property>` as
subtests.
## How other tools address it
Some of the testing frameworks in the ecosystem address this issue by
fitting subtests into the `<testcase>` layer. For instance, take a look
at the following Go test file:
```go
package main_test
import "testing"
func TestMain(t *testing.T) {
t.Run("child 1", func(t *testing.T) {
// OK
})
t.Run("child 2", func(t *testing.T) {
// Error
t.Fatal("error")
})
}
```
Running [gotestsum], we can get the output like this:
```xml
<?xml version="1.0" encoding="UTF-8"?>
<testsuites tests="3" failures="2" errors="0" time="1.013694">
<testsuite tests="3" failures="2" time="0.510000" name="example/gosumtest" timestamp="2024-03-11T12:26:39+09:00">
<properties>
<property name="go.version" value="go1.22.1 darwin/arm64"></property>
</properties>
<testcase classname="example/gosumtest" name="TestMain/child_2" time="0.000000">
<failure message="Failed" type="">=== RUN TestMain/child_2
 main_test.go:12: error
--- FAIL: TestMain/child_2 (0.00s)
</failure>
</testcase>
<testcase classname="example/gosumtest" name="TestMain" time="0.000000">
<failure message="Failed" type="">=== RUN TestMain
--- FAIL: TestMain (0.00s)
</failure>
</testcase>
<testcase classname="example/gosumtest" name="TestMain/child_1" time="0.000000"></testcase>
</testsuite>
</testsuites>
```
This output shows that nested test cases are squashed into the
`<testcase>` layer by treating them as the same layer as their parent,
`TestMain`. We can still distinguish nested ones by their `name`
attributes that look like `TestMain/<subtest_name>`.
As described in #22795, [vitest] solves the issue in the same way as
[gotestsum].
One downside of this would be that one test failure that happens in a
nested test case will end up being counted multiple times, because not
only the subtest but also its wrapping container(s) are considered to be
failures. In fact, in the [gotestsum] output above, `TestMain/child_2`
failed (which is totally expected) while its parent, `TestMain`, was
also counted as failure. As
https://github.com/denoland/deno/pull/20273#discussion_r1307558757
pointed out, there is a test runner that offers flexibility to prevent
this, but I personally don't think the "duplicate failure count" issue
is a big deal.
## How to fix the issue in this patch
This patch fixes the issue with the same approach as [gotestsum] and
[vitest].
More specifically, nested test cases are put into the `<testcase>` level
and their names are now represented as squashed test names concatenated
by `>` (e.g. `parent 2 > child 1 > grandchild 1`). This change also
allows us to put a detailed error message as `<failure>` tag within the
`<testcase>` tag, which should be handled nicely by third-party tools
supporting JUnit XML.
## Extra fix
Also, file paths embedded into XML outputs are changed from absolute
path to relative path, which is helpful when running the test suites in
several different environments like CI.
Resolves #22795
[gotestsum]: https://github.com/gotestyourself/gotestsum
[vitest]: https://vitest.dev/
---------
Co-authored-by: Bartek Iwańczuk <biwanczuk@gmail.com>
