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* @license
* Copyright 2026 Google LLC
* SPDX-License-Identifier: Apache-2.0
*/
import fs from 'node:fs';
import path from 'node:path';
import { beforeEach, describe, expect, it, vi } from 'vitest';
import { SettingScope } from '../../config/settings.js';
import { getLiteRtBinDir } from './constants.js';
const mockLoadSettings = vi.hoisted(() => vi.fn());
vi.mock('../../config/settings.js', () => ({
loadSettings: mockLoadSettings,
SettingScope: {
User: 'User',
},
}));
import {
getBinaryPath,
isExpectedLiteRtServerCommand,
isBinaryInstalled,
readServerProcessInfo,
resolveGemmaConfig,
} from './platform.js';
describe('gemma platform helpers', () => {
function createMockSettings(
userGemmaSettings?: object,
mergedGemmaSettings?: object,
) {
return {
merged: {
experimental: {
gemmaModelRouter: mergedGemmaSettings,
},
},
forScope: vi.fn((scope: SettingScope) => {
if (scope !== SettingScope.User) {
throw new Error(`Unexpected scope ${scope}`);
}
return {
settings: {
experimental: {
gemmaModelRouter: userGemmaSettings,
},
},
};
}),
};
}
beforeEach(() => {
vi.clearAllMocks();
mockLoadSettings.mockReturnValue(createMockSettings());
});
it('prefers the configured binary path from settings', () => {
mockLoadSettings.mockReturnValue(
createMockSettings({ binaryPath: '/custom/lit' }),
);
expect(getBinaryPath('lit.test')).toBe('/custom/lit');
});
it('ignores workspace overrides for the configured binary path', () => {
mockLoadSettings.mockReturnValue(
createMockSettings(
{ binaryPath: '/user/lit' },
{ binaryPath: '/workspace/evil' },
),
);
expect(getBinaryPath('lit.test')).toBe('/user/lit');
});
it('falls back to the default install location when no custom path is set', () => {
expect(getBinaryPath('lit.test')).toBe(
path.join(getLiteRtBinDir(), 'lit.test'),
);
});
it('resolves the configured port and binary path from settings', () => {
mockLoadSettings.mockReturnValue(
createMockSettings(
{ binaryPath: '/custom/lit' },
{
enabled: true,
classifier: {
host: 'http://localhost:8123/v1beta',
},
},
),
);
expect(resolveGemmaConfig(9379)).toEqual({
settingsEnabled: true,
configuredPort: 8123,
configuredBinaryPath: '/custom/lit',
});
});
it('checks binary installation using the resolved binary path', () => {
mockLoadSettings.mockReturnValue(
createMockSettings({ binaryPath: '/custom/lit' }),
);
vi.spyOn(fs, 'existsSync').mockReturnValue(true);
expect(isBinaryInstalled()).toBe(true);
expect(fs.existsSync).toHaveBeenCalledWith('/custom/lit');
});
it('parses structured server process info from the pid file', () => {
vi.spyOn(fs, 'readFileSync').mockReturnValue(
JSON.stringify({
pid: 1234,
binaryPath: '/custom/lit',
port: 8123,
}),
);
expect(readServerProcessInfo()).toEqual({
pid: 1234,
binaryPath: '/custom/lit',
port: 8123,
});
});
it('parses legacy pid-only files for backward compatibility', () => {
vi.spyOn(fs, 'readFileSync').mockReturnValue('4321');
expect(readServerProcessInfo()).toEqual({
pid: 4321,
});
});
it('matches only the expected LiteRT serve command', () => {
expect(
isExpectedLiteRtServerCommand('/custom/lit serve --port=8123 --verbose', {
binaryPath: '/custom/lit',
port: 8123,
}),
).toBe(true);
expect(
isExpectedLiteRtServerCommand('/custom/lit run --port=8123', {
binaryPath: '/custom/lit',
port: 8123,
}),
).toBe(false);
expect(
isExpectedLiteRtServerCommand('/custom/lit serve --port=9000', {
binaryPath: '/custom/lit',
port: 8123,
}),
).toBe(false);
});
});
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