fix(overlay): Linux X11/XWayland stacking, stale pause state, multi-copy selector (#101)

src/renderer/renderer-init-order.test.ts

@@ -0,0 +1,83 @@
+import assert from 'node:assert/strict';
+import fs from 'node:fs';
+import path from 'node:path';
+import test from 'node:test';
+
+const rendererSource = fs.readFileSync(
+  path.join(process.cwd(), 'src/renderer/renderer.ts'),
+  'utf8',
+);
+
+function indexOfRequired(pattern: string): number {
+  const index = rendererSource.indexOf(pattern);
+  assert.notEqual(index, -1, `Expected renderer.ts to contain ${pattern}`);
+  return index;
+}
+
+test('renderer applies subtitle style and position before first subtitle paint', () => {
+  const styleIndex = indexOfRequired(
+    'const initialSubtitleStyle = await window.electronAPI.getSubtitleStyle();',
+  );
+  const positionIndex = indexOfRequired(
+    "await window.electronAPI.getSubtitlePosition(),\n    'startup',",
+  );
+  const listenerIndex = indexOfRequired('window.electronAPI.onSubtitle((data: SubtitleData) => {');
+  const currentSubtitleIndex = indexOfRequired(
+    'initialSubtitle = await window.electronAPI.getCurrentSubtitle();',
+  );
+
+  assert.ok(styleIndex < listenerIndex);
+  assert.ok(positionIndex < listenerIndex);
+  assert.ok(styleIndex < currentSubtitleIndex);
+  assert.ok(positionIndex < currentSubtitleIndex);
+});
+
+test('renderer renders initial subtitle snapshot before subscribing to live subtitle updates', () => {
+  const listenerIndex = indexOfRequired('window.electronAPI.onSubtitle((data: SubtitleData) => {');
+  const currentSubtitleIndex = indexOfRequired(
+    'initialSubtitle = await window.electronAPI.getCurrentSubtitle();',
+  );
+  const initialRenderIndex = indexOfRequired('subtitleRenderer.renderSubtitle(initialSubtitle);');
+
+  assert.ok(currentSubtitleIndex < initialRenderIndex);
+  assert.ok(initialRenderIndex < listenerIndex);
+});
+
+test('renderer reports subtitle bounds immediately after initial subtitle layout', () => {
+  const initialRenderIndex = indexOfRequired('subtitleRenderer.renderSubtitle(initialSubtitle);');
+  const initialLayoutIndex = indexOfRequired(
+    'subtitleRenderer.renderSubtitle(initialSubtitle);\n  positioning.applyYPercent(positioning.getCurrentYPercent());',
+  );
+  const immediateMeasurementIndex = indexOfRequired(
+    'positioning.applyYPercent(positioning.getCurrentYPercent());\n  measurementReporter.emitNow();',
+  );
+  const listenerIndex = indexOfRequired('window.electronAPI.onSubtitle((data: SubtitleData) => {');
+
+  assert.equal(initialRenderIndex, initialLayoutIndex);
+  assert.ok(initialLayoutIndex < immediateMeasurementIndex);
+  assert.ok(immediateMeasurementIndex < listenerIndex);
+});
+
+test('renderer reports subtitle bounds immediately after live subtitle layout', () => {
+  const liveRenderIndex = indexOfRequired('subtitleRenderer.renderSubtitle(data);');
+  const liveLayoutIndex = indexOfRequired(
+    'subtitleRenderer.renderSubtitle(data);\n      positioning.applyYPercent(positioning.getCurrentYPercent());',
+  );
+  const immediateMeasurementIndex = indexOfRequired(
+    'positioning.applyYPercent(positioning.getCurrentYPercent());\n      measurementReporter.emitNow();',
+  );
+  const sidebarUpdateIndex = indexOfRequired('subtitleSidebarModal.handleSubtitleUpdated(data);');
+
+  assert.equal(liveRenderIndex, liveLayoutIndex);
+  assert.ok(liveLayoutIndex < immediateMeasurementIndex);
+  assert.ok(immediateMeasurementIndex < sidebarUpdateIndex);
+});
+
+test('renderer restores subtitle sidebar open state only on visible overlay layer', () => {
+  const sidebarRestoreIndex = indexOfRequired(
+    "ctx.platform.overlayLayer === 'visible' && (await window.electronAPI.getSubtitleSidebarOpen())",
+  );
+  const sidebarModalIndex = indexOfRequired('const subtitleSidebarModal = createSubtitleSidebarModal');
+
+  assert.ok(sidebarModalIndex < sidebarRestoreIndex);
+});