fix(core): [CORE-24] preserve source playback intent and explicit pauses

test/browser/source-intent.spec.js

@@ -0,0 +1,60 @@
+import { expect, test } from './fixtures.js'
+
+async function start(page, core) {
+  await page.goto(`/test/player.html?core=${core}`)
+  await page.evaluate(() => window.createPlayer('/test/pattern.mp4?intent=initial'))
+  await expect.poll(() => page.evaluate(() => window.art.isReady)).toBe(true)
+  await page.locator('#play').click()
+  await expect.poll(() => page.evaluate(() => window.art.currentTime)).toBeGreaterThan(0.3)
+}
+
+for (const core of ['published', 'candidate']) {
+  test(`${core}: rapid source switches preserve playing on the latest real video without plugins`, async ({ page }, testInfo) => {
+    await start(page, core)
+    await page.evaluate(async () => {
+      window.restarted = []
+      window.art.on('restart', url => window.restarted.push(url))
+      await Promise.all(['one', 'two', 'last'].map(name => window.art.switchUrl(`/test/pattern.mp4?intent=${name}`)))
+    })
+    await expect.poll(() => page.evaluate(() => window.art.currentTime)).toBeGreaterThan(0.3)
+    expect(await page.evaluate(() => window.art.video.paused)).toBe(false)
+    expect(await page.evaluate(() => window.art.video.currentSrc)).toContain('intent=last')
+    expect(await page.evaluate(() => window.restarted)).toEqual(core === 'candidate' ? ['/test/pattern.mp4?intent=last'] : ['one', 'two', 'last'].map(name => `/test/pattern.mp4?intent=${name}`))
+    await testInfo.attach('source-intent', { contentType: 'application/json', body: JSON.stringify(await page.evaluate(() => ({ time: window.art.currentTime, paused: window.art.video.paused, restarts: window.restarted }))) })
+    await page.evaluate(() => window.art.destroy())
+  })
+}
+
+for (const command of ['pause-before-next', 'pause-after-next', 'reentrant-pause', 'pause-listener-switch']) {
+  test(`candidate: ${command} cancels automatic resume until the next user play`, async ({ page }, testInfo) => {
+    await start(page, 'candidate')
+    await page.evaluate(async (command) => {
+      const { art } = window
+      if (command === 'reentrant-pause')
+        art.once('pause', () => art.pause())
+      const first = art.switchUrl('/test/pattern.mp4?intent=first')
+      if (command === 'pause-before-next')
+        art.pause()
+      let last
+      if (command === 'pause-listener-switch') {
+        art.once('pause', () => {
+          last = art.switchUrl('/test/pattern.mp4?intent=last')
+        })
+        art.pause()
+      }
+      else {
+        last = art.switchUrl('/test/pattern.mp4?intent=last')
+      }
+      if (command === 'pause-after-next')
+        art.pause()
+      await Promise.all([first, last])
+    }, command)
+    expect(await page.evaluate(() => window.art.video.paused)).toBe(true)
+    expect(await page.evaluate(() => window.art.video.currentSrc)).toContain('intent=last')
+    await testInfo.attach('source-paused', { contentType: 'application/json', body: JSON.stringify(await page.evaluate(() => ({ paused: window.art.video.paused, readyState: window.art.video.readyState }))) })
+    await page.locator('#play').click()
+    await expect.poll(() => page.evaluate(() => window.art.currentTime)).toBeGreaterThan(0.3)
+    expect(await page.evaluate(() => window.art.video.paused)).toBe(false)
+    await page.evaluate(() => window.art.destroy())
+  })
+}