feat(config): add configuration window (#70)

src/main/runtime/autoplay-subtitle-primer.test.ts

@@ -0,0 +1,59 @@
+import assert from 'node:assert/strict';
+import test from 'node:test';
+import { selectAutoplayStartupCue } from './autoplay-subtitle-primer';
+
+test('selectAutoplayStartupCue returns the active cue at the current time', () => {
+  assert.deepEqual(
+    selectAutoplayStartupCue(
+      [
+        { startTime: 1, endTime: 3, text: 'first' },
+        { startTime: 4, endTime: 5, text: 'second' },
+      ],
+      2,
+      1,
+    ),
+    { startTime: 1, endTime: 3, text: 'first' },
+  );
+});
+
+test('selectAutoplayStartupCue returns the next imminent cue before playback starts', () => {
+  assert.deepEqual(
+    selectAutoplayStartupCue(
+      [
+        { startTime: 1.2, endTime: 3, text: 'first' },
+        { startTime: 4, endTime: 5, text: 'second' },
+      ],
+      0,
+      2,
+    ),
+    { startTime: 1.2, endTime: 3, text: 'first' },
+  );
+});
+
+test('selectAutoplayStartupCue clamps negative current time to startup', () => {
+  assert.deepEqual(
+    selectAutoplayStartupCue([{ startTime: 0, endTime: 1, text: 'startup' }], -0.5, 0),
+    { startTime: 0, endTime: 1, text: 'startup' },
+  );
+});
+
+test('selectAutoplayStartupCue does not reveal far future subtitle text', () => {
+  assert.equal(
+    selectAutoplayStartupCue([{ startTime: 12, endTime: 15, text: 'later' }], 0, 2),
+    null,
+  );
+});
+
+test('selectAutoplayStartupCue skips blank cues', () => {
+  assert.deepEqual(
+    selectAutoplayStartupCue(
+      [
+        { startTime: 0, endTime: 1, text: '   ' },
+        { startTime: 0.5, endTime: 2, text: 'visible' },
+      ],
+      0.75,
+      1,
+    ),
+    { startTime: 0.5, endTime: 2, text: 'visible' },
+  );
+});