test: cover WSL support on Windows

Author: dum3r

package.json

@@ -5,6 +5,9 @@
   "bin": {
     "codedash": "./bin/cli.js"
   },
+  "scripts": {
+    "test": "node --test"
+  },
   "files": [
     "bin/",
     "src/"

test/wsl-windows.test.js

@@ -0,0 +1,103 @@
+const test = require('node:test');
+const assert = require('node:assert/strict');
+
+const data = require('../src/data');
+
+const {
+  parseWslDistroList,
+  getWslDistroList,
+  getRunningWslDistroSet,
+  filterWslDistrosForProcessScan,
+  buildWslUncPath,
+  parseWslProcessLine,
+  parseWslPsSnapshotLine,
+  resolveWslActiveSession,
+  shortenHomePath,
+} = data.__test;
+
+test('parseWslDistroList decodes UTF-16LE output and strips BOM/nulls', () => {
+  const raw = Buffer.from('\uFEFFUbuntu-24.04\r\ndocker-desktop\r\n', 'utf16le');
+  assert.deepEqual(parseWslDistroList(raw), ['Ubuntu-24.04', 'docker-desktop']);
+  assert.deepEqual(parseWslDistroList('\uFEFFUbuntu\0-24.04\r\ndocker\0-desktop\r\n'), ['Ubuntu-24.04', 'docker-desktop']);
+});
+
+test('getWslDistroList and getRunningWslDistroSet fail safely when WSL is unavailable', () => {
+  assert.deepEqual(getWslDistroList(() => { throw new Error('ENOENT'); }), []);
+  assert.equal(getRunningWslDistroSet(() => { throw new Error('disabled'); }), null);
+});
+
+test('getRunningWslDistroSet parses running distros and process scan filters to them', () => {
+  const running = getRunningWslDistroSet(() => Buffer.from('\uFEFFUbuntu-24.04\r\ndebian\r\n', 'utf16le'));
+  assert.deepEqual(Array.from(running).sort(), ['Ubuntu-24.04', 'debian']);
+  assert.deepEqual(
+    filterWslDistrosForProcessScan(['Ubuntu-24.04', 'docker-desktop', 'debian'], running),
+    ['Ubuntu-24.04', 'debian']
+  );
+  assert.deepEqual(filterWslDistrosForProcessScan(['Ubuntu-24.04'], null), ['Ubuntu-24.04']);
+});
+
+test('buildWslUncPath and shortenHomePath normalize WSL-visible paths', () => {
+  assert.equal(buildWslUncPath('Ubuntu-24.04', '/home/dius'), '\\\\wsl$\\Ubuntu-24.04\\home\\dius');
+  assert.equal(buildWslUncPath('Ubuntu-24.04', '/'), '\\\\wsl$\\Ubuntu-24.04\\');
+  assert.equal(buildWslUncPath('', '/home/dius'), '');
+  assert.equal(buildWslUncPath('Ubuntu-24.04', 'home/dius'), '');
+  assert.equal(shortenHomePath('/home/dius/projects/codedash', ['\\\\wsl$\\Ubuntu-24.04\\home\\dius']), '~/projects/codedash');
+  assert.equal(shortenHomePath('\\\\wsl$\\Ubuntu-24.04\\home\\dius\\projects\\codedash', ['\\\\wsl$\\Ubuntu-24.04\\home\\dius']), '~\\projects\\codedash');
+});
+
+test('parseWslPsSnapshotLine and parseWslProcessLine normalize process data', () => {
+  const snapshot = parseWslPsSnapshotLine('1190 985 0.0 1528 42 sh -c sleep 300 codex');
+  assert.equal(snapshot.rawPid, 1190);
+  assert.equal(snapshot.rawParentPid, 985);
+  assert.equal(snapshot.rssKb, 1528);
+  assert.equal(snapshot.commandLine, 'sh -c sleep 300 codex');
+
+  const parsed = parseWslProcessLine('123\t45\t1.7\t20480\t600\t/home/dius/projects/codedash\tcodex resume 019d6dc8-03d4-72e0-8239-bda72acb65fb', 'Ubuntu-24.04');
+  assert.equal(parsed.pid, 'wsl:Ubuntu-24.04:123');
+  assert.equal(parsed.parentPid, 'wsl:Ubuntu-24.04:45');
+  assert.equal(parsed.cwd, '/home/dius/projects/codedash');
+  assert.equal(parsed.ws, 20480 * 1024);
+});
+
+test('resolveWslActiveSession uses cmdline, then cwd, then synthetic fallback', () => {
+  const cmdlineProc = {
+    distro: 'Ubuntu-24.04',
+    rawPid: 123,
+    commandLine: 'codex resume 019d6dc8-03d4-72e0-8239-bda72acb65fb',
+    cwd: '/home/dius/projects/codedash',
+    startedAt: '2026-04-09T10:00:00.000Z',
+  };
+  const sessions = [
+    { id: '019d6dc8-03d4-72e0-8239-bda72acb65fb', project: '/real/from-session' },
+    { id: 'cwd-session', project: '/home/dius/projects/codedash' },
+  ];
+  const latestByToolProject = {
+    'codex|/home/dius/projects/codedash': { id: 'cwd-session' },
+  };
+
+  const fromCmdline = resolveWslActiveSession(cmdlineProc, 'codex', sessions, latestByToolProject);
+  assert.equal(fromCmdline.sessionId, '019d6dc8-03d4-72e0-8239-bda72acb65fb');
+  assert.equal(fromCmdline.sessionSource, 'cmdline');
+  assert.equal(fromCmdline.unassociated, false);
+
+  const fromCwd = resolveWslActiveSession({
+    distro: 'Ubuntu-24.04',
+    rawPid: 124,
+    commandLine: 'codex',
+    cwd: '/home/dius/projects/codedash',
+    startedAt: '2026-04-09T10:00:00.000Z',
+  }, 'codex', sessions, latestByToolProject);
+  assert.equal(fromCwd.sessionId, 'cwd-session');
+  assert.equal(fromCwd.sessionSource, 'cwd-match');
+
+  const synthetic = resolveWslActiveSession({
+    distro: 'Ubuntu-24.04',
+    rawPid: 125,
+    commandLine: 'codex',
+    cwd: '/home/dius/projects/unknown',
+    startedAt: '',
+  }, 'codex', sessions, latestByToolProject);
+  assert.equal(synthetic.sessionId, 'wsl-proc:Ubuntu-24.04:125');
+  assert.equal(synthetic.sessionSource, 'wsl-proc');
+  assert.equal(synthetic.unassociated, true);
+});