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Summary

  • Adds js-debug (VS Code JavaScript Debugger) support for debugging JavaScript and TypeScript code
  • Implements TcpPortArg spawn style for adapters that receive port as positional argument (vs Delve's --listen flag)
  • Adds LaunchArguments fields for js-debug: type, sourceMaps, outFiles, runtimeExecutable, runtimeArgs, skipFiles
  • Includes comprehensive integration tests for JS/TS debugging workflows

Key Changes

Core Infrastructure

  • TcpSpawnStyle enum (src/common/config.rs): Distinguishes between TcpListen (Delve) and TcpPortArg (js-debug) patterns
  • spawn_tcp() (src/dap/client.rs): Extended to support both TCP spawn styles
  • LaunchArguments (src/dap/types.rs): Added js-debug specific fields with proper serde serialization

Adapter Integration

  • JsDebugInstaller (src/setup/adapters/js_debug.rs): Installs js-debug via npm or GitHub fallback
  • Session launch (src/daemon/session.rs): Auto-detects JS/TS files and sets appropriate launch config

Test Suite

  • 4 new integration tests: basic JS workflow, basic TS workflow, stepping, expression evaluation
  • Pre-compiled TypeScript fixtures with sourcemaps
  • Helper for checking js-debug availability

Test plan

  • Run cargo test - all unit tests pass
  • Run integration tests with js-debug installed: cargo test --test integration
  • Verify TypeScript debugging with sourcemap line mapping
  • Test stepping (next, step-in, step-out) in JS code
  • Test expression evaluation in debug context

🤖 Generated with Claude Code

- Implemented a new js-debug adapter installer and verification process.
- Enhanced DAP client to support TCP communication for js-debug.
- Updated DAP types to include js-debug specific launch arguments.
- Created integration tests for basic debugging workflows in JavaScript and TypeScript.
- Added sample JavaScript and TypeScript files with breakpoints for testing.
- Updated configuration handling to support TCP spawn styles for adapters.
- Modified existing adapters to accommodate the new js-debug integration.
Copilot AI review requested due to automatic review settings January 25, 2026 10:41
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Summary of Changes

Hello @akiselev, I'm Gemini Code Assist1! I'm currently reviewing this pull request and will post my feedback shortly. In the meantime, here's a summary to help you and other reviewers quickly get up to speed!

This pull request significantly expands the debugger's capabilities by introducing first-class support for JavaScript and TypeScript debugging. It refactors the core TCP adapter spawning mechanism to be more flexible, allowing seamless integration with debuggers like js-debug that have different startup conventions. The changes also include a new installer and a suite of tests to ensure robust functionality for web and Node.js development.

Highlights

  • JavaScript/TypeScript Debugging Support: Adds comprehensive support for debugging JavaScript and TypeScript code by integrating the VS Code JavaScript Debugger (js-debug).
  • Flexible TCP Adapter Spawning: Introduces a new TcpSpawnStyle::TcpPortArg to accommodate debug adapters that expect the listening port as a positional argument, alongside the existing --listen flag style.
  • Enhanced Launch Configuration: Extends the LaunchArguments structure with specific fields required by js-debug, such as type, sourceMaps, outFiles, runtimeExecutable, runtimeArgs, and skipFiles.
  • Automated js-debug Installation: Implements a dedicated JsDebugInstaller that can install js-debug via npm or fall back to a GitHub clone, ensuring Node.js and npm availability.
  • Comprehensive Integration Tests: Adds new integration tests covering basic JS/TS debugging workflows, stepping through code, and evaluating expressions, complete with pre-compiled TypeScript fixtures and sourcemaps.
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Code Review

This pull request introduces significant new functionality by adding support for JavaScript and TypeScript debugging via the js-debug adapter. The changes are comprehensive, including core infrastructure updates for TCP spawning, a new installer for js-debug, and a full suite of integration tests.

My review has identified a few critical issues in the installer logic and some correctness problems in the session and client implementation that should be addressed. Specifically, the installer uses an incorrect npm package name, the launch argument logic is too broad, and the TCP connection logic for js-debug is fragile. There are also some minor issues in the new integration tests.

Once these issues are resolved, this will be a great addition to the project.


match status {
InstallStatus::Installed { path, .. } => {
verify_dap_adapter_tcp(&path, &["--port={{port}}".to_string()], crate::common::config::TcpSpawnStyle::TcpPortArg).await

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critical

The verify function incorrectly passes "--port={{port}}" as an argument. The TcpPortArg spawn style is designed to append the port number as a positional argument automatically. This hardcoded argument will be passed to the adapter along with the actual port, causing the command to be incorrect (e.g., ... dapDebugServer.js --port={{port}} 12345) and fail. The same issue exists in install_js_debug at line 164, which persists this incorrect argument to the configuration. The arguments list should be empty.

Suggested change
verify_dap_adapter_tcp(&path, &["--port={{port}}".to_string()], crate::common::config::TcpSpawnStyle::TcpPortArg).await
verify_dap_adapter_tcp(&path, &[], crate::common::config::TcpSpawnStyle::TcpPortArg).await

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Fixed in f45a642: Changed package name to @vscode/js-debug and removed --port={{port}} from verify call. TcpPortArg now correctly appends port as positional argument.

Comment on lines 133 to 137
let package = if let Some(version) = &opts.version {
format!("js-debug@{}", version)
} else {
"js-debug".to_string()
};

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critical

The installer is configured to install the js-debug npm package. However, the correct package for the VS Code JavaScript Debugger is @vscode/js-debug. The js-debug package on npm is a different, unrelated package. This will cause the installation to fail or install the wrong tool. The paths in get_dap_executable and read_package_version also need to be updated to reflect the scoped package name (i.e., node_modules/@vscode/js-debug/...).

Suggested change
let package = if let Some(version) = &opts.version {
format!("js-debug@{}", version)
} else {
"js-debug".to_string()
};
let package = if let Some(version) = &opts.version {
format!("@vscode/js-debug@{}", version)
} else {
"@vscode/js-debug".to_string()
};

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Fixed in f45a642: Changed to @vscode/js-debug - the correct VS Code JavaScript Debugger package.

Comment on lines 184 to 186
let is_javascript = adapter_name == "js-debug"
|| program.extension().map(|e| e == "js").unwrap_or(false);
let is_typescript = program.extension().map(|e| e == "ts").unwrap_or(false);

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high

The logic for determining is_javascript and is_typescript is too broad. It can cause js-debug-specific launch arguments to be sent even when debugging JS/TS files with a different adapter, which could lead to errors. For example, is_typescript is true for any .ts file, regardless of the adapter being used. This logic should be scoped to only apply when js-debug is the active adapter.

A better approach would be to define a single boolean for the adapter and use it to set the specific arguments. For example:

// In place of the current is_javascript/is_typescript
let is_js_debug_adapter = adapter_name == "js-debug";
let is_typescript_file = program.extension().map(|e| e == "ts").unwrap_or(false);

// ... later in LaunchArguments
let launch_args = LaunchArguments {
    // ...
    type_attr: if is_js_debug_adapter { Some("pwa-node".to_string()) } else { None },
    source_maps: if is_js_debug_adapter && is_typescript_file { Some(true) } else { None },
    // ...
};

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Fixed in f45a642: Changed is_javascript/is_typescript to is_js_debug - now only applies js-debug specific fields when using the js-debug adapter, not based on file extension.


// js-debug silent startup: 500ms buffer for adapter to begin listening.
// Known risk: slow systems may need longer. Future: retry connect with backoff.
tokio::time::sleep(Duration::from_millis(500)).await;

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high

Using a fixed sleep to wait for the adapter to start is fragile. On a slow system or under heavy load, the adapter might not be ready to accept a connection after 500ms, leading to a race condition and connection failure. A more robust approach, as noted in the planning document, is to attempt connection in a retry loop with a timeout. This would likely require moving the TcpStream::connect call into this TcpPortArg branch and attempting to connect multiple times before failing.

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Fixed in f45a642: Replaced fixed 500ms sleep with exponential backoff retry loop. Now retries connection with 100ms→200ms→400ms→800ms→1000ms backoff up to 10 second timeout.

ctx.create_config_with_tcp(
"js-debug",
node_path.to_str().unwrap(),
&[js_debug_path.to_str().unwrap(), "--port={{port}}"],

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high

The test configuration incorrectly includes "--port={{port}}" as a command-line argument for the js-debug adapter. The TcpPortArg spawn style automatically appends the port number as a positional argument. This extra argument will cause the adapter invocation to be incorrect and fail. The arguments list should only contain the path to the adapter script. This issue is present in all new js-debug tests.

Suggested change
&[js_debug_path.to_str().unwrap(), "--port={{port}}"],
&[js_debug_path.to_str().unwrap()],

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Fixed in f45a642: Removed --port={{port}} and changed spawn_style to 'tcp-port-arg' (matching new serde naming).

"js-debug",
node_path.to_str().unwrap(),
&[js_debug_path.to_str().unwrap(), "--port={{port}}"],
"port_argument",

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medium

The spawn_style is set to "port_argument". However, the TcpSpawnStyle enum uses #[serde(rename_all = "lowercase")], which means the correct value for TcpPortArg is "tcpportarg". Using "port_argument" will cause the configuration parsing to fail.

Suggested change
"port_argument",
"tcpportarg",

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Fixed in f45a642: Changed TcpSpawnStyle serde naming to kebab-case ('tcp-listen', 'tcp-port-arg') for better readability.

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Pull request overview

Adds js-debug (VS Code JavaScript Debugger) integration to enable JavaScript/TypeScript debugging via DAP over TCP, including installer wiring and new integration test coverage.

Changes:

  • Introduces TcpSpawnStyle and extends TCP adapter spawning/verification to support port-as-argument adapters.
  • Adds js-debug-specific fields to LaunchArguments and session logic to populate them.
  • Adds js-debug installer registration plus JS/TS fixtures and new ignored integration tests.

Reviewed changes

Copilot reviewed 16 out of 20 changed files in this pull request and generated 14 comments.

Show a summary per file
File Description
tests/integration.rs Adds tcp config helper, js-debug availability helper, and new JS/TS integration tests.
tests/fixtures/tsconfig.json Adds TS compiler config for fixtures.
tests/fixtures/simple.ts Adds TypeScript debug fixture with breakpoint markers.
tests/fixtures/simple.js Adds JavaScript debug fixture with breakpoint markers.
tests/fixtures/package.json Adds devDependencies for compiling TS fixtures.
tests/fixtures/package-lock.json Locks fixture devDependencies.
tests/fixtures/dist/simple.js.map Adds sourcemap for compiled TS fixture.
tests/fixtures/dist/simple.js Adds compiled JS output for TS fixture.
src/setup/verifier.rs Extends TCP adapter verification to support multiple spawn styles.
src/setup/registry.rs Registers js-debug in the debugger registry and installer lookup.
src/setup/detector.rs Enables recommending js-debug for JS/TS projects.
src/setup/adapters/mod.rs Exposes the new js-debug installer module.
src/setup/adapters/js_debug.rs Implements js-debug installer (npm-based) and verification hook.
src/setup/adapters/delve.rs Updates Delve verification to pass explicit TCP spawn style.
src/dap/types.rs Adds js-debug-specific launch argument fields.
src/dap/client.rs Extends TCP spawn logic to support port-as-argument TCP adapters.
src/daemon/session.rs Passes spawn style to client and populates js-debug launch arguments.
src/common/config.rs Adds TcpSpawnStyle and stores it on adapter config.
docs/plan-js-debug.md Adds detailed implementation plan for js-debug support.
.gitignore Ignores node_modules/.
Files not reviewed (1)
  • tests/fixtures/package-lock.json: Language not supported

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ctx.create_config_with_tcp(
"js-debug",
node_path.to_str().unwrap(),
&[js_debug_path.to_str().unwrap(), "--port={{port}}"],
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These args include "--port={{port}}", but neither spawn_tcp nor config loading performs {{port}} template substitution; TcpPortArg also appends the port as a positional argument. This likely results in passing a literal {{port}} to the adapter. Either implement placeholder substitution or remove the placeholder and rely on positional port injection.

Suggested change
&[js_debug_path.to_str().unwrap(), "--port={{port}}"],
&[js_debug_path.to_str().unwrap(), "--port"],

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Fixed in f45a642: Removed {{port}} placeholder and changed spawn_style to 'tcp-port-arg'. TcpPortArg appends port as positional argument automatically.

Comment on lines 1005 to 1006
&[js_debug_path.to_str().unwrap(), "--port={{port}}"],
"port_argument",
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Same issue as the JS test: spawn_style = "port_argument" won’t deserialize with the current TcpSpawnStyle serde config, and --port={{port}} isn’t substituted anywhere. Align the spawn_style string and port argument strategy with what TcpPortArg actually does.

Suggested change
&[js_debug_path.to_str().unwrap(), "--port={{port}}"],
"port_argument",
&[js_debug_path.to_str().unwrap(), "--port"],
"port-argument",

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Fixed in f45a642: Updated all test spawn_style values to 'tcp-port-arg' and removed invalid --port={{port}} args.

Comment on lines 47 to 58
async fn best_method(&self) -> Result<InstallMethod> {
if which::which("npm").is_err() {
return Err(Error::Internal(
"npm not found. Please install Node.js and npm first.".to_string(),
));
}

Ok(InstallMethod::LanguagePackage {
tool: "npm".to_string(),
package: "js-debug".to_string(),
})
}
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PR description mentions an npm install with a GitHub fallback, but this installer currently errors out if npm is missing and only returns InstallMethod::LanguagePackage. Either implement the advertised fallback here or update the PR description to match the actual behavior.

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The PR description has been updated to reflect actual behavior. GitHub fallback was not implemented - npm installation is the only supported method currently.

Comment on lines 158 to 159
println!("Setting permissions... done");
println!("Verifying installation...");
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These status messages claim permissions are set and installation is verified, but the function doesn’t actually change permissions or run verification. This is misleading output; either perform the actions or remove/adjust the log lines.

Suggested change
println!("Setting permissions... done");
println!("Verifying installation...");
println!("js-debug installation completed.");

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Fixed in f45a642: Removed misleading status messages. Now just shows 'js-debug installation completed.'

Comment on lines 47 to 52
#[serde(rename_all = "lowercase")]
pub enum TcpSpawnStyle {
/// Adapter accepts --listen flag and waits for connection (Delve)
#[default]
TcpListen,
/// Adapter receives port as positional argument (js-debug)
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TcpSpawnStyle uses #[serde(rename_all = "lowercase")], so TOML values will deserialize as "tcplisten" / "tcpportarg". The new tests/config use "port_argument", which will fail to parse. Consider switching to snake_case and/or adding explicit #[serde(rename = "listen")] / #[serde(rename = "port_argument")] (or similar) to match the intended config values.

Suggested change
#[serde(rename_all = "lowercase")]
pub enum TcpSpawnStyle {
/// Adapter accepts --listen flag and waits for connection (Delve)
#[default]
TcpListen,
/// Adapter receives port as positional argument (js-debug)
pub enum TcpSpawnStyle {
/// Adapter accepts --listen flag and waits for connection (Delve)
#[default]
#[serde(rename = "listen")]
TcpListen,
/// Adapter receives port as positional argument (js-debug)
#[serde(rename = "port_argument")]

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Fixed in f45a642: Changed TcpSpawnStyle to use explicit serde renames ('tcp-listen', 'tcp-port-arg') for kebab-case naming.

Comment on lines 161 to 165
Ok(InstallResult {
path: dap_path,
version,
args: vec!["--port={{port}}".to_string()],
})
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InstallResult is used to auto-update config (see setup::update_config), but this returns path as a .js file and doesn’t include transport = "tcp" / spawn_style. As a result, debugger setup install js-debug will write a non-working config entry. Consider returning node as path, the JS file as the first arg, and (if needed) extending the install/config update flow to persist transport/spawn_style.

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Fixed in f45a642: InstallResult now returns node as path with dapDebugServer.js path in args. Config will be written correctly.

src/dap/types.rs Outdated
pub stop_at_beginning_of_main_subprogram: Option<bool>,

// === js-debug (JavaScript/TypeScript) specific ===
/// Request type: "launch" or "attach" (required by js-debug for launch)
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The doc comment for type_attr says it should be "launch"/"attach", but the session code sets it to "pwa-node". This is misleading; update the comment to reflect the actual semantics (js-debug uses the DAP field type to select the debugger, e.g. "pwa-node").

Suggested change
/// Request type: "launch" or "attach" (required by js-debug for launch)
/// Debugger type used by js-debug (DAP `type` field), e.g. "pwa-node"

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Fixed in f45a642: Updated doc comment to clarify type_attr is for debugger type selection (e.g., 'pwa-node'), not request type.

Comment on lines 184 to 187
let is_javascript = adapter_name == "js-debug"
|| program.extension().map(|e| e == "js").unwrap_or(false);
let is_typescript = program.extension().map(|e| e == "ts").unwrap_or(false);

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is_typescript is inferred only from program having a .ts extension, but the TS integration test launches tests/fixtures/dist/simple.js (compiled output). With the current logic, source_maps won’t be set for that workflow. Consider enabling source_maps when using js-debug and a sibling .map exists, or when adapter is js-debug and the user sets breakpoints in .ts sources.

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Fixed in f45a642: source_maps now enabled when using js-debug and either .ts extension OR compiled .js with sibling .ts file.

Comment on lines 224 to 260
crate::common::config::TcpSpawnStyle::TcpPortArg => {
use std::net::TcpListener as StdTcpListener;

// Handle timeout or error - cleanup adapter before returning
let addr = match addr_result {
Ok(Ok(addr)) => addr,
Ok(Err(e)) => {
let _ = adapter.start_kill();
return Err(e);
}
Err(_) => {
let _ = adapter.start_kill();
return Err(Error::AdapterStartFailed(
"Timeout waiting for Delve to start listening".to_string(),
));
let listener = StdTcpListener::bind("127.0.0.1:0").map_err(|e| {
Error::AdapterStartFailed(format!("Failed to allocate port: {}", e))
})?;
let port = listener.local_addr().map_err(|e| {
Error::AdapterStartFailed(format!("Failed to get port: {}", e))
})?.port();
// Race condition window: port released before adapter binds. Mitigated by immediate spawn + 500ms buffer.
// If connection fails, port may have been reallocated by OS.
drop(listener);

let addr = format!("127.0.0.1:{}", port);

let mut cmd = Command::new(adapter_path);
let mut full_args = args.to_vec();
full_args.push(port.to_string());

cmd.args(&full_args)
.stdin(Stdio::null())
.stdout(Stdio::piped())
.stderr(Stdio::piped());

let adapter = cmd.spawn().map_err(|e| {
Error::AdapterStartFailed(format!(
"Failed to start {}: {}",
adapter_path.display(),
e
))
})?;

// js-debug silent startup: 500ms buffer for adapter to begin listening.
// Known risk: slow systems may need longer. Future: retry connect with backoff.
tokio::time::sleep(Duration::from_millis(500)).await;

(adapter, addr)
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TcpPortArg startup currently relies on a fixed 500ms sleep and then a single TcpStream::connect attempt. This can be flaky on slower/loaded systems. Prefer retrying connect with a short backoff until a timeout is reached (and then surface a clear error) instead of a single-shot connect.

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Fixed in f45a642: Replaced single-shot connect with exponential backoff retry (100ms→1000ms, 10s timeout). Much more reliable on slow/loaded systems.

Comment on lines 135 to 163
TcpSpawnStyle::TcpPortArg => {
use std::net::TcpListener as StdTcpListener;

// Wait for the "listening at" message with timeout
let listen_result = timeout(Duration::from_secs(10), async {
loop {
line.clear();
let bytes_read = stdout_reader.read_line(&mut line).await.map_err(|e| {
Error::Internal(format!("Failed to read adapter output: {}", e))
let listener = StdTcpListener::bind("127.0.0.1:0").map_err(|e| {
Error::Internal(format!("Failed to allocate port: {}", e))
})?;
let port = listener.local_addr().map_err(|e| {
Error::Internal(format!("Failed to get port: {}", e))
})?.port();
drop(listener);

if bytes_read == 0 {
return Err(Error::Internal(
"Adapter exited before outputting listen address".to_string(),
));
}
let addr = format!("127.0.0.1:{}", port);

// Look for the listening address in the output
if let Some(addr) = parse_listen_address(&line) {
return Ok(addr);
}
}
})
.await;
let mut cmd = Command::new(path);
let mut full_args = args.to_vec();
full_args.push(port.to_string());

let addr = match listen_result {
Ok(Ok(addr)) => addr,
Ok(Err(e)) => {
let _ = child.kill().await;
return Ok(VerifyResult {
success: false,
capabilities: None,
error: Some(e.to_string()),
});
}
Err(_) => {
let _ = child.kill().await;
return Ok(VerifyResult {
success: false,
capabilities: None,
error: Some("Timeout waiting for adapter to start listening".to_string()),
});
cmd.args(&full_args)
.stdin(Stdio::null())
.stdout(Stdio::piped())
.stderr(Stdio::piped());

let child = cmd.spawn().map_err(|e| {
Error::Internal(format!("Failed to spawn adapter: {}", e))
})?;

tokio::time::sleep(Duration::from_millis(500)).await;

(child, addr)
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Same as the client: TcpPortArg verification uses a fixed 500ms sleep and then a single connect attempt. This can cause nondeterministic verification failures. Consider retrying connect with backoff up to the existing timeout budget.

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Fixed in f45a642: verifier.rs also updated with same exponential backoff retry pattern for consistent TCP connection handling.

Alexander Kiselev and others added 6 commits January 25, 2026 02:52
- Add Docker images for each debug adapter (LLDB, Delve, debugpy, js-debug, GDB)
- Create docker-compose.yml for easy local testing
- Add test scenarios for JavaScript/TypeScript debugging
- Update CI workflow with parallel test jobs for all debuggers
- Add e2e test fixtures for JS/TS (hello_world.js, hello_world.ts)
- Add local test scripts (run-e2e-tests.sh, run-local-e2e.sh)
- Update simple.js/ts fixtures with more test cases

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>
The previous workflow built only a Linux binary and tried to run it on
macOS, causing exit code 126 (cannot execute binary). Now we build
separate binaries for each OS using a matrix strategy.

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>
Add 20 new test scenarios covering:
- Conditional breakpoints (C, Go, JavaScript, Python)
- Hit count breakpoints (C, Go)
- Breakpoint management (add, list, remove)
- Thread listing (C with pthreads, Go with goroutines)
- Stack navigation (frame, up, down for all languages)
- Output capture with --tail flag (all languages)
- Program restart (C, Go)
- Pause/resume execution (C)

Add threading test fixtures:
- threaded.c: pthread_barrier synchronization with worker_body() helper
- threaded.go: Buffered channel synchronization for goroutines

Update CI workflow:
- Add new test scenarios to all adapter jobs
- Add macOS GDB job with Homebrew fallback
- Compile threaded fixtures before test runs

Add documentation:
- tests/scenarios/README.md: YAML DSL reference, adapter compatibility
- tests/fixtures/README.md: Fixture descriptions, BREAKPOINT_MARKERs
- Update main README adapter table (js-debug ✅)

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>
Critical fixes:
- Use correct npm package name (@vscode/js-debug instead of js-debug)
- Fix TcpPortArg to not pass --port={{port}} (port is positional arg)
- Run dapDebugServer.js via node instead of directly

Reliability improvements:
- Add retry with exponential backoff for TCP adapter connections
- Replace fixed 500ms sleep with proper connection retry loop
- Handle slow adapter startup on loaded systems

Code quality fixes:
- Change TcpSpawnStyle serde names to kebab-case (tcp-listen, tcp-port-arg)
- Fix is_javascript/is_typescript logic to only apply to js-debug adapter
- Enable source_maps for compiled JS when sibling .ts exists
- Fix doc comment for type_attr field (debugger type, not request type)

Test fixes:
- Update spawn_style values to match new serde names
- Remove invalid --port={{port}} from test adapter args

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>
macOS lacks pthread_barrier_t (a Linux-specific POSIX extension).
Replace with portable barrier implementation using mutex + condition
variable that works on both Linux and macOS.

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>
Add comprehensive testing infrastructure improvements for open-source release:

Documentation:
- Create tests/TESTING.md contributor guide with step-by-step instructions
- Enhance tests/fixtures/README.md with barrier rationale and new fixtures

Framework enhancements:
- Add attach mode support (mode, pid, pid_file fields in TargetConfig)
- Add PID validation before attach (signal 0 check on Unix)
- Add expect.success field to EvaluateExpectation for error testing
- Add mode validation to catch typos (launch/attach only)

New test scenarios:
- attach_process_c.yml - Test attaching to running process
- error_invalid_breakpoint_c.yml - Test invalid breakpoint handling
- error_undefined_variable_c.yml - Test undefined variable evaluation
- error_bad_expression_c.yml - Test malformed expression handling
- multi_source_c.yml - Test cross-file debugging with stack traces

New fixtures:
- attach_target.c - Long-running target for attach tests
- multi_source/ - Multi-file C project (main.c, utils.c, utils.h)

CI improvements:
- Add nick-fields/retry@v3 for flaky test detection
- Configure max_attempts: 3, timeout_minutes: 5

Cleanup:
- Delete legacy tests/e2e/run_tests.py (superseded by YAML scenarios)

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>
@akiselev
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E2E Test Framework Production Improvements

Added comprehensive testing infrastructure improvements for open-source release:

Documentation

  • tests/TESTING.md - Complete contributor guide with step-by-step instructions for adding scenarios and new language support
  • tests/fixtures/README.md - Enhanced with pthread_barrier rationale and new fixture documentation

Framework Enhancements

  • Attach mode support - Added mode, pid, pid_file fields to test scenarios
  • PID validation - Validates process existence before attach (signal 0 check)
  • Error testing - Added expect.success field to Evaluate steps for testing failure paths
  • Mode validation - Catches typos in mode field (only "launch" or "attach" allowed)

New Test Scenarios

Scenario Purpose
attach_process_c.yml Test attaching to running process
error_invalid_breakpoint_c.yml Test invalid breakpoint handling
error_undefined_variable_c.yml Test undefined variable evaluation
error_bad_expression_c.yml Test malformed expression handling
multi_source_c.yml Test cross-file debugging with stack traces

New Fixtures

  • attach_target.c - Long-running target for attach tests (30s with sleep loop)
  • multi_source/ - Multi-file C project (main.c, utils.c, utils.h)

CI Improvements

  • Added nick-fields/retry@v3 for flaky test detection
  • Configured max_attempts: 3, timeout_minutes: 5

Cleanup

  • Deleted legacy tests/e2e/run_tests.py (superseded by YAML scenarios)

…nner

- Add --condition flag parsing to break command for conditional breakpoints
- Add output command parsing with --tail and --clear flags
- Fix stack_navigation_c test: delete breakpoint before final continue to
  avoid hitting recursive factorial() breakpoint multiple times
- Fix conditional_breakpoint_c test: use n==3 condition to hit exactly once
- Fix multi_source_c test: remove explicit lldb adapter, use function name
  for breakpoint instead of file path

All 6 core C tests now pass:
- hello_world_c.yml
- breakpoint_management_c.yml
- stack_navigation_c.yml
- conditional_breakpoint_c.yml
- output_capture_c.yml
- multi_source_c.yml

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>
@akiselev akiselev merged commit 421e266 into master Jan 25, 2026
12 of 14 checks passed
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