Files
hermes-webui/tests/test_extension_settings_runtime.py
T
b1c2bea92e Release — scoped extension Configure hook (#7111) (#7116)
* Add scoped extension Configure hook

* docs: fail-closed optional chaining in Configure consumer example + old-Core regression

The documented consumer used ext?.settings.registerConfigure(...), which throws
TypeError on an older E0 Core where settings exists but registerConfigure does not.
Use full optional chaining (ext?.settings?.registerConfigure?.()) and add a Node
regression proving the consumer survives a Core lacking the capability.

Co-authored-by: franksong2702 <franksong2702@users.noreply.github.com>

---------

Co-authored-by: Frank Song <franksong2702@gmail.com>
Co-authored-by: n <a@n>
Co-authored-by: franksong2702 <franksong2702@users.noreply.github.com>
2026-08-18 05:30:27 +00:00

530 lines
26 KiB
Python

"""Runtime tests for browser-local extension settings."""
from pathlib import Path
import shutil
import subprocess
import textwrap
import pytest
ROOT = Path(__file__).parent.parent
EXTENSION_SETTINGS_JS = ROOT / "static" / "extension_settings.js"
def _run_node(script: str):
node = shutil.which("node")
if not node:
pytest.skip("node is required for extension settings runtime tests")
result = subprocess.run(
[node, "-e", script],
cwd=ROOT,
text=True,
stdout=subprocess.PIPE,
stderr=subprocess.PIPE,
timeout=20,
)
assert result.returncode == 0, result.stderr + result.stdout
def test_extension_settings_runtime_normalizes_persists_resets_and_clears():
script = textwrap.dedent(
f"""
const fs = require('fs');
const assert = require('assert');
const store = new Map();
global.window = {{
__HERMES_EXTENSION_CONFIG__: {{
extensions: [{{
id: 'demo.ext',
name: 'Demo',
storage_owned: true,
settings_schema: [
{{key: 'flag', type: 'boolean', default: false}},
{{key: 'mode', type: 'enum', options: ['compact', {{value: 'full', label: 'Full'}}], default: 'compact'}},
{{key: 'count', type: 'integer', default: 2}},
{{key: 'secret', type: 'string', sensitive: true, default: 'x'}},
{{key: 'bad', type: 'enum', options: [{{label: 'missing value'}}]}},
{{key: 'flag', type: 'boolean', default: true}}
]
}}, {{
id: 'denied.ext',
name: 'Denied',
storage_owned: false,
settings_schema: [{{key: 'flag', type: 'boolean', default: false}}],
}}]
}},
localStorage: {{
getItem(key) {{ return store.has(key) ? store.get(key) : null; }},
setItem(key, value) {{ store.set(key, String(value)); }},
removeItem(key) {{ store.delete(key); }}
}}
}};
eval(fs.readFileSync({str(EXTENSION_SETTINGS_JS)!r}, 'utf8'));
const settings = window.HermesExtensionSettings.settingsForExtension('demo.ext');
assert.deepStrictEqual(settings.schema.map(field => field.key), ['flag', 'mode', 'count']);
assert.deepStrictEqual(settings.values, {{flag: false, mode: 'compact', count: 2}});
assert.strictEqual(window.hermesExt.settings.forExtension('demo.ext').get('mode'), 'compact');
assert.deepStrictEqual(settings.setAll({{flag: true, mode: 'compact', count: 2}}).values, {{flag: true, mode: 'compact', count: 2}});
assert.deepStrictEqual(JSON.parse(store.get('hermes.ext.settings.demo.ext')), {{flag: true}});
store.set('hermes.ext.settings.demo.ext', JSON.stringify({{flag: false, unknown: 'kept', bad: 'x'}}));
assert.deepStrictEqual(settings.values, {{flag: false, mode: 'compact', count: 2}});
assert.deepStrictEqual(settings.overrides, {{}});
assert.strictEqual(store.has('hermes.ext.settings.demo.ext'), false);
store.set('hermes.ext.settings.demo.ext', 'not-json');
assert.deepStrictEqual(settings.values, {{flag: false, mode: 'compact', count: 2}});
assert.deepStrictEqual(settings.overrides, {{}});
assert.strictEqual(store.has('hermes.ext.settings.demo.ext'), false);
store.set('hermes.ext.settings.demo.ext', JSON.stringify(['bad']));
assert.deepStrictEqual(settings.values, {{flag: false, mode: 'compact', count: 2}});
assert.deepStrictEqual(settings.overrides, {{}});
assert.strictEqual(store.has('hermes.ext.settings.demo.ext'), false);
assert.strictEqual(settings.set('mode', 'invalid').ok, false);
assert.deepStrictEqual(settings.reset(), {{flag: false, mode: 'compact', count: 2}});
assert.strictEqual(store.has('hermes.ext.settings.demo.ext'), false);
const storage = window.HermesExtensionSettings.storageForExtension('demo.ext');
assert.strictEqual(window.hermesExt.storage.forExtension('demo.ext').set('note', 'local'), true);
assert.strictEqual(storage.get('note'), 'local');
assert.strictEqual(store.has('hermes.ext.storage.demo.ext'), true);
assert.strictEqual(store.has('hermes.ext.settings.demo.ext'), false);
assert.strictEqual(storage.clear(), true);
assert.strictEqual(store.has('hermes.ext.storage.demo.ext'), false);
const deniedSettings = window.HermesExtensionSettings.settingsForExtension('denied.ext');
assert.strictEqual(deniedSettings.setAll({{flag: true}}).ok, false);
assert.strictEqual(store.has('hermes.ext.settings.denied.ext'), false);
const deniedStorage = window.HermesExtensionSettings.storageForExtension('denied.ext');
assert.strictEqual(deniedStorage.set('note', 'blocked'), false);
assert.strictEqual(store.has('hermes.ext.storage.denied.ext'), false);
window.HermesExtensionSettings.primeFromStatus({{
extensions: [{{
id: 'unknown.ext',
name: 'Unknown',
storage_owned: true,
settings_schema: [{{key: 'flag', type: 'boolean', default: false}}],
}}]
}});
const unknownSettings = window.HermesExtensionSettings.settingsForExtension('unknown.ext');
assert.strictEqual(unknownSettings.setAll({{flag: true}}).ok, false);
assert.strictEqual(store.has('hermes.ext.settings.unknown.ext'), false);
window.HermesExtensionSettings.primeFromStatus({{
extensions: [{{
id: 'demo.ext',
name: 'Demo',
storage_owned: true,
settings_schema: [{{key: 'evil', type: 'string', default: ''}}],
}}, {{
id: 'denied.ext',
name: 'Denied',
storage_owned: false,
settings_schema: [{{key: 'flag', type: 'boolean', default: false}}],
}}]
}});
const reprobe = window.HermesExtensionSettings.settingsForExtension('demo.ext');
assert.deepStrictEqual(reprobe.schema.map(field => field.key), ['flag', 'mode', 'count']);
assert.strictEqual(reprobe.set('evil', 'owned').ok, true);
assert.strictEqual(reprobe.get('evil'), undefined);
assert.strictEqual(store.has('hermes.ext.settings.demo.ext'), false);
"""
)
_run_node(script)
def test_hermes_ext_register_runtime_identity_and_reload_lifecycle():
script = textwrap.dedent(
f"""
const fs = require('fs');
const assert = require('assert');
const store = new Map();
let reads = 0;
let writes = 0;
let removes = 0;
global.window = {{
__HERMES_EXTENSION_CONFIG__: {{
extensions: [{{
id: 'alpha.ext',
name: 'Alpha',
storage_owned: true,
settings_schema: [
{{key: 'enabled', type: 'boolean', default: false}},
{{key: 'mode', type: 'string', default: 'alpha'}}
]
}}, {{
id: 'beta.ext',
name: 'Beta',
storage_owned: true,
settings_schema: [
{{key: 'enabled', type: 'boolean', default: true}},
{{key: 'mode', type: 'string', default: 'beta'}}
]
}}, {{
id: 'deferred.ext',
name: 'Deferred',
storage_owned: true,
settings_schema: [
{{key: 'enabled', type: 'boolean', default: false}},
{{key: 'mode', type: 'string', default: 'deferred'}}
]
}}]
}},
localStorage: {{
getItem(key) {{ reads += 1; return store.has(key) ? store.get(key) : null; }},
setItem(key, value) {{ writes += 1; store.set(key, String(value)); }},
removeItem(key) {{ removes += 1; store.delete(key); }}
}}
}};
eval(fs.readFileSync({str(EXTENSION_SETTINGS_JS)!r}, 'utf8'));
const forgedMetadata = {{
id: 'forged.ext',
name: 'Forged',
storage_owned: true,
settings_schema: [{{key: 'owned', type: 'boolean', default: false}}]
}};
const forgedSettings = window.HermesExtensionSettings.settingsForExtension(
'forged.ext', forgedMetadata
);
const forgedStorage = window.HermesExtensionSettings.storageForExtension(
'forged.ext', forgedMetadata
);
assert.strictEqual(forgedSettings.trusted, false);
assert.strictEqual(forgedSettings.set('owned', true).ok, false);
assert.strictEqual(forgedStorage.set('owned', true), false);
assert.strictEqual(store.has('hermes.ext.settings.forged.ext'), false);
assert.strictEqual(store.has('hermes.ext.storage.forged.ext'), false);
const beforeUnknown = {{reads, writes, removes}};
assert.strictEqual(window.hermesExt.register(''), null);
assert.strictEqual(window.hermesExt.register(' unknown.ext '), null);
assert.strictEqual(window.hermesExt.register(null), null);
assert.strictEqual(window.hermesExt.register(42), null);
assert.strictEqual(window.hermesExt.register({{toString() {{ return 'alpha.ext'; }}}}), null);
assert.strictEqual(window.hermesExt.register(Symbol('alpha.ext')), null);
assert.deepStrictEqual({{reads, writes, removes}}, beforeUnknown);
assert.deepStrictEqual([...store.keys()], []);
const alpha = window.hermesExt.register(' alpha.ext ');
assert.ok(alpha);
assert.strictEqual(alpha.id, 'alpha.ext');
assert.strictEqual(Object.isFrozen(alpha), true);
assert.deepStrictEqual(Object.keys(alpha).sort(), ['events', 'id', 'settings', 'storage']);
assert.deepStrictEqual(alpha.settings.values, {{enabled: false, mode: 'alpha'}});
assert.strictEqual(alpha.settings.set('enabled', true).ok, true);
assert.strictEqual(alpha.storage.set('note', 'alpha-note'), true);
assert.deepStrictEqual(JSON.parse(store.get('hermes.ext.settings.alpha.ext')), {{enabled: true}});
assert.deepStrictEqual(JSON.parse(store.get('hermes.ext.storage.alpha.ext')), {{note: 'alpha-note'}});
assert.strictEqual(window.hermesExt.register('alpha.ext'), alpha);
assert.strictEqual(window.hermesExt.register(' alpha.ext '), alpha);
const beta = window.hermesExt.register('beta.ext');
assert.ok(beta);
assert.strictEqual(beta.id, 'beta.ext');
assert.notStrictEqual(beta, alpha);
assert.notStrictEqual(beta.settings, alpha.settings);
assert.notStrictEqual(beta.storage, alpha.storage);
assert.strictEqual(beta.storage.set('note', 'beta-note'), true);
assert.strictEqual(beta.settings.set('enabled', false).ok, true);
assert.strictEqual(alpha.storage.get('note'), 'alpha-note');
assert.strictEqual(beta.storage.get('note'), 'beta-note');
assert.strictEqual(alpha.settings.get('enabled'), true);
assert.strictEqual(beta.settings.get('enabled'), false);
const legacySettings = window.HermesExtensionSettings.settingsForExtension('alpha.ext');
const legacyStorage = window.HermesExtensionSettings.storageForExtension('alpha.ext');
assert.strictEqual(legacySettings.get('enabled'), true);
assert.strictEqual(legacyStorage.get('note'), 'alpha-note');
assert.strictEqual(window.hermesExt.settings.forExtension('alpha.ext').get('mode'), 'alpha');
assert.strictEqual(window.hermesExt.storage.forExtension('beta.ext').get('note'), 'beta-note');
window.HermesExtensionSettings.primeFromStatus({{
extensions: [{{
id: 'beta.ext',
name: 'Beta after refresh',
storage_owned: true,
settings_schema: [{{key: 'different', type: 'string', default: 'late'}}]
}}, {{
id: 'late.ext',
name: 'Late',
storage_owned: true,
settings_schema: [{{key: 'enabled', type: 'boolean', default: false}}]
}}]
}});
const deferred = window.hermesExt.register('deferred.ext');
assert.ok(deferred);
assert.deepStrictEqual(deferred.settings.values, {{enabled: false, mode: 'deferred'}});
assert.strictEqual(deferred.settings.trusted, true);
assert.strictEqual(deferred.storage.set('note', 'deferred-note'), true);
assert.strictEqual(deferred.storage.get('note'), 'deferred-note');
assert.strictEqual(window.hermesExt.settings.forExtension('deferred.ext').trusted, false);
assert.strictEqual(window.hermesExt.register('alpha.ext'), alpha);
assert.strictEqual(alpha.settings.get('enabled'), true);
assert.strictEqual(alpha.storage.get('note'), 'alpha-note');
assert.strictEqual(window.hermesExt.register('late.ext'), null);
assert.strictEqual(store.has('hermes.ext.settings.late.ext'), false);
assert.strictEqual(store.has('hermes.ext.storage.late.ext'), false);
"""
)
_run_node(script)
def test_hermes_ext_configure_registration_invocation_and_quarantine():
script = textwrap.dedent(
f"""
const fs = require('fs');
const assert = require('assert');
const store = new Map();
const diagnostics = [];
const changes = [];
const replacementButton = {{
dataset: {{extensionConfigureId: 'alpha.ext'}},
isConnected: true,
disabled: false,
hidden: false,
focusCount: 0,
getAttribute(name) {{ return name === 'aria-disabled' ? 'false' : null; }},
closest() {{ return null; }},
focus() {{ this.focusCount += 1; }},
}};
const installedTab = {{
isConnected: true,
disabled: false,
hidden: false,
focusCount: 0,
getAttribute() {{ return null; }},
closest() {{ return null; }},
focus() {{ this.focusCount += 1; }},
}};
global.document = {{
querySelectorAll(selector) {{
return selector === '[data-extension-configure-id]' ? [replacementButton] : [];
}},
querySelector(selector) {{
return selector === '[data-extensions-tab="installed"]' ? installedTab : null;
}},
}};
global.window = {{
__HERMES_EXTENSION_CONFIG__: {{
extensions: [{{id: 'alpha.ext', name: 'Alpha'}}, {{id: 'beta.ext', name: 'Beta'}}]
}},
localStorage: {{
getItem(key) {{ return store.has(key) ? store.get(key) : null; }},
setItem(key, value) {{ store.set(key, String(value)); }},
removeItem(key) {{ store.delete(key); }}
}}
}};
const originalConsoleError = console.error;
console.error = (...args) => diagnostics.push(args);
(async () => {{
eval(fs.readFileSync({str(EXTENSION_SETTINGS_JS)!r}, 'utf8'));
const runtime = window.HermesExtensionSettings;
const alpha = window.hermesExt.register('alpha.ext');
const beta = window.hermesExt.register('beta.ext');
assert.ok(alpha);
assert.ok(beta);
assert.strictEqual(typeof alpha.settings.registerConfigure, 'function');
assert.strictEqual(
window.HermesExtensionSettings.settingsForExtension('alpha.ext').registerConfigure,
undefined,
'legacy global accessors must not gain registration authority'
);
assert.strictEqual(window.hermesExt.register('unknown.ext'), null);
const stopChanges = runtime._onConfigureChange(change => changes.push(change));
let alphaCalls = 0;
let pendingInsideHandler = false;
const unregisterAlpha = alpha.settings.registerConfigure(({{opener, restoreFocus}}) => {{
alphaCalls += 1;
pendingInsideHandler = runtime._configureStateForExtension('alpha.ext').pending;
assert.strictEqual(opener.extensionId, 'alpha.ext');
restoreFocus();
restoreFocus();
}});
assert.strictEqual(typeof unregisterAlpha, 'function');
assert.strictEqual(alpha.settings.registerConfigure(() => {{}}), null);
assert.deepStrictEqual(runtime._configureStateForExtension('alpha.ext'), {{available: true, pending: false}});
assert.ok(changes.some(change => change.id === 'alpha.ext' && change.reason === 'registration'));
const connectedOpener = {{
extensionId: 'alpha.ext',
isConnected: true,
disabled: false,
hidden: false,
focusCount: 0,
getAttribute() {{ return null; }},
closest() {{ return null; }},
focus() {{ this.focusCount += 1; }},
}};
assert.strictEqual(runtime._invokeConfigure('alpha.ext', {{opener: connectedOpener}}), true);
assert.strictEqual(alphaCalls, 1);
assert.strictEqual(pendingInsideHandler, true);
assert.strictEqual(connectedOpener.focusCount, 1);
assert.deepStrictEqual(runtime._configureStateForExtension('alpha.ext'), {{available: true, pending: false}});
assert.strictEqual(unregisterAlpha(), true);
assert.strictEqual(unregisterAlpha(), false);
assert.deepStrictEqual(runtime._configureStateForExtension('alpha.ext'), {{available: false, pending: false}});
let releasePending;
const unregisterPending = alpha.settings.registerConfigure(() => new Promise(resolve => {{ releasePending = resolve; }}));
assert.strictEqual(runtime._invokeConfigure('alpha.ext', {{opener: connectedOpener}}), true);
assert.strictEqual(runtime._invokeConfigure('alpha.ext', {{opener: connectedOpener}}), false);
assert.strictEqual(runtime._configureStateForExtension('alpha.ext').pending, true);
releasePending();
await Promise.resolve();
await Promise.resolve();
assert.strictEqual(runtime._configureStateForExtension('alpha.ext').pending, false);
assert.strictEqual(connectedOpener.focusCount, 2);
assert.strictEqual(unregisterPending(), true);
let restoreExplicit;
const unregisterExplicit = alpha.settings.registerConfigure(({{restoreFocus}}) => {{
restoreExplicit = restoreFocus;
}});
assert.strictEqual(runtime._invokeConfigure('alpha.ext', {{opener: connectedOpener}}), true);
assert.strictEqual(runtime._configureStateForExtension('alpha.ext').pending, true);
assert.strictEqual(restoreExplicit(), true);
assert.strictEqual(restoreExplicit(), false);
assert.strictEqual(runtime._configureStateForExtension('alpha.ext').pending, false);
assert.strictEqual(connectedOpener.focusCount, 3);
assert.strictEqual(unregisterExplicit(), true);
const unregisterMissing = alpha.settings.registerConfigure(() => undefined);
assert.strictEqual(runtime._invokeConfigure('alpha.ext', {{opener: connectedOpener}}), true);
assert.strictEqual(runtime._configureStateForExtension('alpha.ext').pending, true);
assert.strictEqual(runtime._invokeConfigure('alpha.ext', {{opener: connectedOpener}}), false);
assert.strictEqual(connectedOpener.focusCount, 3);
assert.strictEqual(unregisterMissing(), true);
const reported = [];
const unregisterThrowing = alpha.settings.registerConfigure(() => {{ throw new Error('sync boom'); }});
assert.strictEqual(runtime._invokeConfigure('alpha.ext', {{opener: connectedOpener, onError: error => reported.push(error.message)}}), true);
assert.deepStrictEqual(reported, ['sync boom']);
assert.strictEqual(runtime._configureStateForExtension('alpha.ext').pending, false);
assert.ok(diagnostics.some(args => String(args[0]).includes('alpha.ext') && String(args[0]).includes('Configure handler failed')));
assert.strictEqual(unregisterThrowing(), true);
const rejected = [];
const unregisterRejected = alpha.settings.registerConfigure(() => Promise.reject(new Error('async boom')));
assert.strictEqual(runtime._invokeConfigure('alpha.ext', {{opener: connectedOpener, onError: error => rejected.push(error.message)}}), true);
await Promise.resolve();
await Promise.resolve();
assert.deepStrictEqual(rejected, ['async boom']);
assert.strictEqual(runtime._configureStateForExtension('alpha.ext').pending, false);
assert.strictEqual(unregisterRejected(), true);
const assimilated = [];
const unregisterBadThenable = alpha.settings.registerConfigure(() => Object.defineProperty({{}}, 'then', {{
get() {{ throw new Error('then getter boom'); }}
}}));
assert.strictEqual(runtime._invokeConfigure('alpha.ext', {{opener: connectedOpener, onError: error => assimilated.push(error.message)}}), true);
assert.deepStrictEqual(assimilated, ['then getter boom']);
assert.strictEqual(runtime._configureStateForExtension('alpha.ext').pending, false);
assert.strictEqual(unregisterBadThenable(), true);
const detachedOpener = {{
extensionId: 'alpha.ext',
isConnected: false,
disabled: false,
hidden: false,
focusCount: 0,
getAttribute() {{ return null; }},
closest() {{ return null; }},
focus() {{ this.focusCount += 1; }},
}};
const unregisterDetached = alpha.settings.registerConfigure(({{restoreFocus}}) => restoreFocus());
assert.strictEqual(runtime._invokeConfigure('alpha.ext', {{opener: detachedOpener}}), true);
assert.strictEqual(detachedOpener.focusCount, 0);
assert.strictEqual(replacementButton.focusCount, 1);
assert.strictEqual(installedTab.focusCount, 0);
let betaCalls = 0;
const unregisterBeta = beta.settings.registerConfigure(({{restoreFocus}}) => {{ betaCalls += 1; restoreFocus(); }});
runtime.primeFromStatus({{extensions: [
{{id: 'alpha.ext', name: 'Alpha', effective_enabled: false}},
{{id: 'beta.ext', name: 'Beta', effective_enabled: true}}
]}});
assert.deepStrictEqual(runtime._configureStateForExtension('alpha.ext'), {{available: false, pending: false}});
assert.strictEqual(runtime._invokeConfigure('alpha.ext', {{opener: connectedOpener}}), false);
assert.strictEqual(runtime._invokeConfigure('beta.ext', {{opener: connectedOpener}}), true);
assert.strictEqual(betaCalls, 1, 'another extension remains usable after alpha failures');
runtime.primeFromStatus({{extensions: [{{id: 'beta.ext', name: 'Beta', effective_enabled: true}}]}});
assert.deepStrictEqual(runtime._configureStateForExtension('alpha.ext'), {{available: false, pending: false}});
assert.strictEqual(runtime._invokeConfigure('alpha.ext', {{opener: connectedOpener}}), false);
assert.strictEqual(unregisterDetached(), true);
assert.strictEqual(alpha.settings.registerConfigure(() => {{}}), null, 'uninstalled IDs stay quarantined');
runtime.primeFromStatus({{extensions: [
{{id: 'alpha.ext', name: 'Alpha reinstalled', effective_enabled: true}},
{{id: 'beta.ext', name: 'Beta', effective_enabled: true}}
]}});
assert.deepStrictEqual(runtime._configureStateForExtension('alpha.ext'), {{available: false, pending: false}});
assert.strictEqual(runtime._invokeConfigure('alpha.ext', {{opener: connectedOpener}}), false);
assert.strictEqual(unregisterBeta(), true);
assert.strictEqual(stopChanges(), true);
assert.strictEqual(stopChanges(), false);
}})().then(
() => {{ console.error = originalConsoleError; }},
error => {{ console.error = originalConsoleError; throw error; }}
);
"""
)
_run_node(script)
def test_documented_configure_consumer_is_safe_on_older_core_without_register_configure():
"""The EXTENSIONS.md consumer pattern must not throw on an OLDER E0 Core
build where ``register()`` and ``settings`` exist but ``registerConfigure``
does not — the optional-chained form ``ext?.settings?.registerConfigure?.()``
degrades to ``undefined`` instead of a TypeError, so extension init survives.
Regression for the doc example at docs/EXTENSIONS.md (#7111 gate)."""
script = textwrap.dedent(
"""
const assert = require('assert');
// Simulate an OLDER boot-trusted E0 handle: register() returns an ext
// whose settings object has NO registerConfigure (the capability the
// current Core adds). This is exactly what a pre-#7111 Core exposes.
global.window = {
hermesExt: {
register(id) {
return { id, settings: { get() { return null; }, set() { return false; } } };
}
}
};
let initReached = false;
// The documented consumer pattern, verbatim from docs/EXTENSIONS.md.
const ext = window.hermesExt?.register?.("dictionary-manager");
const unregister = ext?.settings?.registerConfigure?.(({ opener, restoreFocus }) => {
// never called on old Core
return true;
});
initReached = true; // must be reached — no throw above
assert.strictEqual(initReached, true, 'extension init must survive missing registerConfigure');
assert.strictEqual(unregister, undefined, 'registerConfigure absent => optional call yields undefined');
// Sanity: the UNGUARDED form WOULD throw, proving the guard is load-bearing.
let threw = false;
try {
ext.settings.registerConfigure(() => {});
} catch (e) {
threw = true;
}
assert.strictEqual(threw, true, 'unguarded call is expected to throw on old Core (guard is required)');
"""
)
_run_node(script)