Bug 1865921 Part 2: Add a test that awaits the device.lost promise. r…

…=ErichDonGubler Differential Revision: https://phabricator.services.mozilla.com/D194311
dothq · Dec 5, 2023 · 1d7f4f9 · 1d7f4f9
1 parent baa0ba8
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diff --git a/dom/webgpu/mochitest/mochitest.toml b/dom/webgpu/mochitest/mochitest.toml
@@ -51,6 +51,11 @@ fail-if = [
   "os == 'mac'",
 ]
 
+["test_device_lost.html"]
+fail-if = [
+  "os == 'linux' && os_version == '18.04'",
+]
+
 ["test_double_encoder_finish.html"]
 fail-if = [
   "os == 'linux' && os_version == '18.04'",

diff --git a/dom/webgpu/mochitest/test_device_lost.html b/dom/webgpu/mochitest/test_device_lost.html
@@ -0,0 +1,40 @@
+<!DOCTYPE html>
+<html>
+  <head>
+    <meta charset="utf-8" />
+    <script src="/tests/SimpleTest/SimpleTest.js"></script>
+    <link rel="stylesheet" href="/tests/SimpleTest/test.css" />
+  </head>
+  <body>
+    <script>
+      ok(
+        SpecialPowers.getBoolPref("dom.webgpu.enabled"),
+        "Pref should be enabled."
+      );
+
+      const func = async function () {
+        const adapter = await navigator.gpu.requestAdapter();
+        const limits = adapter.limits;
+        const features = adapter.features;
+        const device = await adapter.requestDevice();
+        ok(device !== undefined, "device !== undefined");
+
+        const lostPromise = device.lost;
+        device.destroy();
+        const deviceLostReason = await lostPromise;
+
+        is(
+          deviceLostReason.reason,
+          "destroyed",
+          "Reason should correspond to GPUDeviceLostReason.destroyed"
+        );
+        is(deviceLostReason.message, "", "Message should be blank");
+      };
+
+      SimpleTest.waitForExplicitFinish();
+      func()
+        .catch(e => ok(false, "Unhandled exception " + e))
+        .finally(() => SimpleTest.finish());
+    </script>
+  </body>
+</html>