@joystick.js/db-canary/tests/server/lib/load_settings.test.js

JoystickDB - A minimalist database server for the Joystick framework

import test from 'ava';
import { load_settings, get_settings, reload_settings, clear_settings_cache } from '../../../src/server/lib/load_settings.js';

const valid_settings = {
  authentication: {
    password_hash: '$2b$10$example.hash.here'
  },
  database: {
    max_connections: 100
  }
};

test.beforeEach(() => {
  // NOTE: Clean up any cached settings and environment variables before each test.
  clear_settings_cache();
  delete process.env.JOYSTICK_DB_SETTINGS;
});

test.afterEach(() => {
  // NOTE: Clean up environment variables after each test.
  delete process.env.JOYSTICK_DB_SETTINGS;
});

test('load_settings loads valid JSON from environment variable', (t) => {
  process.env.JOYSTICK_DB_SETTINGS = JSON.stringify(valid_settings);
  
  const settings = load_settings();
  
  t.deepEqual(settings, valid_settings);
  t.is(settings.authentication.password_hash, '$2b$10$example.hash.here');
});

test('load_settings throws error for missing environment variable', (t) => {
  const error = t.throws(() => {
    load_settings();
  });
  
  t.true(error.message.includes('JOYSTICK_DB_SETTINGS environment variable is not set'));
});

test('load_settings throws error for invalid JSON in environment variable', (t) => {
  process.env.JOYSTICK_DB_SETTINGS = '{ invalid json }';
  
  const error = t.throws(() => {
    load_settings();
  });
  
  t.true(error.message.includes('Invalid JSON in JOYSTICK_DB_SETTINGS environment variable'));
});

test('get_settings returns cached settings', (t) => {
  process.env.JOYSTICK_DB_SETTINGS = JSON.stringify(valid_settings);
  
  load_settings();
  const settings = get_settings();
  
  t.deepEqual(settings, valid_settings);
});

test('get_settings throws error when settings not loaded', (t) => {
  const error = t.throws(() => {
    get_settings();
  });
  
  t.true(error.message.includes('Settings not loaded'));
});

test('reload_settings reloads from environment variable', (t) => {
  const initial_settings = { test: 'initial' };
  const updated_settings = { test: 'updated' };
  
  process.env.JOYSTICK_DB_SETTINGS = JSON.stringify(initial_settings);
  load_settings();
  
  t.deepEqual(get_settings(), initial_settings);
  
  process.env.JOYSTICK_DB_SETTINGS = JSON.stringify(updated_settings);
  const reloaded = reload_settings();
  
  t.deepEqual(reloaded, updated_settings);
  t.deepEqual(get_settings(), updated_settings);
});

test('load_settings works with complex nested settings', (t) => {
  const complex_settings = {
    authentication: {
      password_hash: '$2b$10$example.hash.here',
      created_at: '2023-01-01T00:00:00.000Z',
      failed_attempts: {},
      rate_limits: {}
    },
    database: {
      max_connections: 100,
      timeout: 5000
    },
    cluster: {
      enabled: true,
      nodes: ['node1', 'node2']
    }
  };
  
  process.env.JOYSTICK_DB_SETTINGS = JSON.stringify(complex_settings);
  
  const settings = load_settings();
  
  t.deepEqual(settings, complex_settings);
});