test: add settings db tests (#44)

Author: splinesreticulating

tests/lib/config.test.ts

@@ -0,0 +1,55 @@
+import fs from 'node:fs'
+import os from 'node:os'
+import path from 'node:path'
+import { beforeEach, afterEach, describe, expect, it, vi } from 'vitest'
+
+let originalCwd: string
+let tempDir: string
+let config: typeof import('../../src/lib/config')
+
+// Utility to clear the env mock object
+async function resetEnv() {
+    const { env } = await import('$env/dynamic/private')
+    for (const key of Object.keys(env)) {
+        delete env[key]
+    }
+}
+
+describe('settings db', () => {
+    beforeEach(async () => {
+        vi.resetModules()
+        await resetEnv()
+        originalCwd = process.cwd()
+        tempDir = fs.mkdtempSync(path.join(os.tmpdir(), 'settings-test-'))
+        process.chdir(tempDir)
+        const { env } = await import('$env/dynamic/private')
+        env.OPENAI_API_KEY = 'default-key'
+        config = await import('$lib/config')
+    })
+
+    afterEach(() => {
+        process.chdir(originalCwd)
+        fs.rmSync(tempDir, { recursive: true, force: true })
+    })
+
+    it('loads default settings from env', async () => {
+        const settings = await config.getAllSettings()
+        const record = settings.find((s) => s.key === 'OPENAI_API_KEY')
+        expect(record?.value).toBe('default-key')
+        expect(config.settings.OPENAI_API_KEY).toBe('default-key')
+    })
+
+    it('updates and reads settings', async () => {
+        await config.updateSetting('TEST_KEY', 'foo')
+        let rows = await config.getAllSettings()
+        let row = rows.find((s) => s.key === 'TEST_KEY')
+        expect(row?.value).toBe('foo')
+        expect(config.settings.TEST_KEY).toBe('foo')
+
+        await config.updateSetting('TEST_KEY', 'bar')
+        rows = await config.getAllSettings()
+        row = rows.find((s) => s.key === 'TEST_KEY')
+        expect(row?.value).toBe('bar')
+        expect(config.settings.TEST_KEY).toBe('bar')
+    })
+})