first pass analytics redo

tests/stats-settings.test.ts

@@ -0,0 +1,51 @@
+import { describe, test, expect, beforeEach, afterEach } from 'bun:test';
+import { testDb } from '$lib/server/db/test';
+import { dashboardSettings } from '$lib/server/db/schema';
+import {
+	getSettings,
+	updateSettings,
+	hashSettings,
+	envSettings,
+	settingsEnvVar
+} from '$lib/server/stats/settings';
+import { SETTINGS_DEFAULTS } from '$lib/types/stats';
+
+async function clear() {
+	await testDb.delete(dashboardSettings);
+}
+
+describe('stats settings', () => {
+	beforeEach(clear);
+	afterEach(clear);
+
+	test('env var names map from keys', () => {
+		expect(settingsEnvVar('d1_target')).toBe('STATS_D1_TARGET');
+	});
+
+	test('empty table returns built-in defaults', async () => {
+		const settings = await getSettings(testDb);
+		expect(settings).toEqual({ ...SETTINGS_DEFAULTS });
+	});
+
+	test('updateSettings upserts and is reflected on re-read', async () => {
+		await updateSettings({ core_plays_per_week: 7 }, testDb);
+		const settings = await getSettings(testDb);
+		expect(settings.core_plays_per_week).toBe(7);
+		// Updating again overwrites rather than duplicating.
+		await updateSettings({ core_plays_per_week: 2 }, testDb);
+		expect((await getSettings(testDb)).core_plays_per_week).toBe(2);
+	});
+
+	test('config hash is stable and changes with settings', () => {
+		const a = hashSettings({ ...SETTINGS_DEFAULTS });
+		const b = hashSettings({ ...SETTINGS_DEFAULTS });
+		const c = hashSettings({ ...SETTINGS_DEFAULTS, d1_target: 99 });
+		expect(a).toBe(b);
+		expect(a).not.toBe(c);
+		expect(a).toHaveLength(12);
+	});
+
+	test('envSettings falls back to defaults with no env overrides', () => {
+		expect(envSettings()).toEqual({ ...SETTINGS_DEFAULTS });
+	});
+});