cover app root case

Author: jsumners-nr

test/unit/lib/subscribers/fixtures/app_root.js

@@ -0,0 +1,20 @@
+/*
+ * Copyright 2026 New Relic Corporation. All rights reserved.
+ * SPDX-License-Identifier: Apache-2.0
+ */
+
+'use strict'
+
+const dc = require('node:diagnostics_channel')
+const resolvePackageVersion = require('../../../../../lib/subscribers/resolve-package-version')
+const Baz = require('./baz/index.js')
+
+dc.subscribe('baz.test', handler)
+const baz = new Baz()
+baz.baz()
+
+function handler() {
+  const version = resolvePackageVersion('baz')
+  console.log(version)
+  process.exit(0)
+}

test/unit/lib/subscribers/resolve-package-version.test.js

@@ -7,6 +7,8 @@
 
 const test = require('node:test')
 const dc = require('node:diagnostics_channel')
+const path = require('node:path')
+const { spawnSync } = require('node:child_process')
 const resolvePackageVersion = require('#agentlib/subscribers/resolve-package-version.js')
 
 const nrPkg = require('../../../../package.json')
@@ -88,6 +90,19 @@ test('stops looking after reaching app root', (t) => {
   }
 })
 
+test('returns unknown if app root does not have manifest', (t) => {
+  const result = spawnSync(
+    process.execPath,
+    [
+      './app_root.js'
+    ],
+    {
+      cwd: path.join(__dirname, 'fixtures')
+    }
+  )
+  t.assert.equal(result.stdout.toString(), 'unknown\n')
+})
+
 test('returns version', (t) => {
   t.plan(2)