1 files changed, 38 insertions, 0 deletions
diff --git a/dom/webgpu/tests/cts/checkout/src/demo/subcases.spec.ts b/dom/webgpu/tests/cts/checkout/src/demo/subcases.spec.ts
new file mode 100644
index 0000000000..6b22463f07
--- /dev/null
+++ b/dom/webgpu/tests/cts/checkout/src/demo/subcases.spec.ts
@@ -0,0 +1,38 @@
+export const description = 'Tests with subcases';
+
+import { makeTestGroup } from '../common/framework/test_group.js';
+import { UnitTest } from '../unittests/unit_test.js';
+
+export const g = makeTestGroup(UnitTest);
+
+g.test('pass_warn_fail')
+  .params(u =>
+    u
+      .combine('x', [1, 2, 3]) //
+      .beginSubcases()
+      .combine('y', [1, 2, 3])
+  )
+  .fn(t => {
+    const { x, y } = t.params;
+    if (x + y > 5) {
+      t.fail();
+    } else if (x + y > 4) {
+      t.warn();
+    }
+  });
+
+g.test('DOMException,cases')
+  .params(u => u.combine('fail', [false, true]))
+  .fn(t => {
+    if (t.params.fail) {
+      throw new DOMException('Message!', 'Name!');
+    }
+  });
+
+g.test('DOMException,subcases')
+  .paramsSubcasesOnly(u => u.combine('fail', [false, true]))
+  .fn(t => {
+    if (t.params.fail) {
+      throw new DOMException('Message!', 'Name!');
+    }
+  });