feat(notifications): add overlay notifications with position config (#110)

src/main/runtime/notification-routing.test.ts

@@ -0,0 +1,29 @@
+import assert from 'node:assert/strict';
+import test from 'node:test';
+import {
+  resolveOverlayReadinessNotificationType,
+  shouldShowDesktop,
+  shouldShowOverlay,
+  shouldShowOsd,
+} from './notification-routing';
+
+test('notification routing preserves system notification while overlay is not ready', () => {
+  assert.equal(resolveOverlayReadinessNotificationType('system', false), 'system');
+});
+
+test('notification routing preserves both while overlay is not ready', () => {
+  assert.equal(resolveOverlayReadinessNotificationType('both', false), 'both');
+});
+
+test('notification routing preserves overlay-only notification while overlay is not ready', () => {
+  assert.equal(resolveOverlayReadinessNotificationType('overlay', false), 'overlay');
+});
+
+test('notification routing predicates classify delivery channels', () => {
+  assert.equal(shouldShowOverlay('both'), true);
+  assert.equal(shouldShowOverlay('system'), false);
+  assert.equal(shouldShowOsd('osd-system'), true);
+  assert.equal(shouldShowOsd('both'), false);
+  assert.equal(shouldShowDesktop('osd-system'), true);
+  assert.equal(shouldShowDesktop('overlay'), false);
+});