1 files changed, 69 insertions, 0 deletions
diff --git a/dom/media/test/browser/wmfme/browser_wmfme_max_crashes.js b/dom/media/test/browser/wmfme/browser_wmfme_max_crashes.js
new file mode 100644
index 0000000000..4472814171
--- /dev/null
+++ b/dom/media/test/browser/wmfme/browser_wmfme_max_crashes.js
@@ -0,0 +1,69 @@
+"use strict";
+
+/**
+ * This test aims to ensure that the MFCDM process won't be recovered once the
+ * amount of crashes has exceeded the amount of value which we tolerate.
+ */
+add_task(async function setupTestingPref() {
+  await SpecialPowers.pushPrefEnv({
+    set: [
+      ["media.wmf.media-engine.enabled", true],
+      ["media.wmf.media-engine.channel-decoder.enabled", true],
+    ],
+  });
+});
+
+const VIDEO_PAGE = GetTestWebBasedURL("file_video.html");
+
+add_task(async function testPlaybackRecoveryFromCrash() {
+  const maxCrashes = Services.prefs.getIntPref(
+    "media.wmf.media-engine.max-crashes"
+  );
+  info(`The amount of tolerable crashes=${maxCrashes}`);
+
+  info(`Create a tab and load test page`);
+  let tab = await BrowserTestUtils.openNewForegroundTab(
+    window.gBrowser,
+    "about:blank"
+  );
+  BrowserTestUtils.loadURIString(tab.linkedBrowser, VIDEO_PAGE);
+  await BrowserTestUtils.browserLoaded(tab.linkedBrowser);
+
+  await playVideo(tab);
+
+  info("Ensure video is running via the media engine framework");
+  await assertRunningProcessAndDecoderName(tab, {
+    expectedProcess: "Utility MF Media Engine CDM",
+    expectedDecoder: "media engine video stream",
+  });
+
+  let pidBeforeCrash, pidAfterCrash;
+  for (let idx = 0; idx < maxCrashes; idx++) {
+    pidBeforeCrash = await getMFCDMProcessId();
+    await crashUtilityProcess(pidBeforeCrash);
+
+    info("The CDM process should be recreated which makes media keep playing");
+    await assertRunningProcessAndDecoderName(tab, {
+      expectedProcess: "Utility MF Media Engine CDM",
+      expectedDecoder: "media engine video stream",
+    });
+
+    pidAfterCrash = await getMFCDMProcessId();
+    isnot(
+      pidBeforeCrash,
+      pidAfterCrash,
+      `new process ${pidAfterCrash} is not previous crashed one ${pidBeforeCrash}`
+    );
+  }
+
+  info("This crash should result in not spawning MFCDM process again");
+  pidBeforeCrash = await getMFCDMProcessId();
+  await crashUtilityProcess(pidBeforeCrash);
+
+  await assertNotEqualRunningProcessAndDecoderName(tab, {
+    givenProcess: "Utility MF Media Engine CDM",
+    givenDecoder: "media engine video stream",
+  });
+
+  BrowserTestUtils.removeTab(tab);
+});