test: ENG-03 share behavior fixtures across source and releases

test/helpers/playback.js

@@ -0,0 +1,27 @@
+import { mock } from 'node:test'
+
+export function playbackFactory({ Emitter, playMix, pauseMix, toggleMix, switchMix }) {
+  return function createArt(play = () => Promise.resolve(), playing = false) {
+    const art = Object.assign(new Emitter(), {
+      url: 'old.mp4',
+      currentTime: 37,
+      aspectRatio: '16:9',
+      playbackRate: 1.5,
+      notice: { show: '' },
+      i18n: { get: key => key },
+      option: { hotkey: true, mutex: false },
+      constructor: { instances: [] },
+      template: {
+        $video: {
+          paused: !playing,
+          play: mock.fn(play),
+          pause() { this.paused = true },
+        },
+      },
+    })
+    Object.defineProperty(art, 'playing', { get: () => !art.template.$video.paused })
+    for (const mix of [playMix, pauseMix, toggleMix, switchMix])
+      mix(art)
+    return art
+  }
+}