import { describe, it, expect, beforeEach, afterEach } from 'vitest';
import { getDisabledLanguages, isLanguageDisabled } from '../../../src/utils/language-config.js';
const originalEnv = { ...process.env };
describe('language configuration helpers', () => {
beforeEach(() => {
process.env = { ...originalEnv };
});
afterEach(() => {
process.env = { ...originalEnv };
});
it('parses disabled languages from environment variable', () => {
process.env.DEBUG_MCP_DISABLE_LANGUAGES = 'python, Rust , , mock';
const disabled = getDisabledLanguages();
expect(disabled).toEqual(new Set(['python', 'rust', 'mock']));
});
it('returns empty set when env variable missing', () => {
delete process.env.DEBUG_MCP_DISABLE_LANGUAGES;
expect(getDisabledLanguages()).toEqual(new Set());
});
it('detects disabled language with case insensitivity', () => {
process.env.DEBUG_MCP_DISABLE_LANGUAGES = 'PYTHON,RUST';
expect(isLanguageDisabled('python')).toBe(true);
expect(isLanguageDisabled('Rust')).toBe(true);
expect(isLanguageDisabled('mock')).toBe(false);
});
it('returns false for falsy language input', () => {
process.env.DEBUG_MCP_DISABLE_LANGUAGES = 'python';
expect(isLanguageDisabled('')).toBe(false);
expect(isLanguageDisabled(null as unknown as string)).toBe(false);
});
});
