1 files changed, 96 insertions, 0 deletions
diff --git a/dom/webgpu/tests/cts/checkout/src/webgpu/api/validation/shader_module/overrides.spec.ts b/dom/webgpu/tests/cts/checkout/src/webgpu/api/validation/shader_module/overrides.spec.ts
new file mode 100644
index 0000000000..ac3645a4a4
--- /dev/null
+++ b/dom/webgpu/tests/cts/checkout/src/webgpu/api/validation/shader_module/overrides.spec.ts
@@ -0,0 +1,96 @@
+export const description = `
+This tests overrides numeric identifiers should not conflict.
+`;
+
+import { makeTestGroup } from '../../../../common/framework/test_group.js';
+import { ValidationTest } from '../validation_test.js';
+
+export const g = makeTestGroup(ValidationTest);
+
+g.test('id_conflict')
+  .desc(
+    `
+Tests that overrides' explicit numeric identifier should not conflict.
+`
+  )
+  .fn(async t => {
+    t.expectValidationError(() => {
+      t.device.createShaderModule({
+        code: `
+@id(1234) override c0: u32;
+@id(4321) override c1: u32;
+
+@compute @workgroup_size(1) fn main() {
+  // make sure the overridable constants are not optimized out
+  _ = c0;
+  _ = c1;
+}
+          `,
+      });
+    }, false);
+
+    t.expectValidationError(() => {
+      t.device.createShaderModule({
+        code: `
+@id(1234) override c0: u32;
+@id(1234) override c1: u32;
+
+@compute @workgroup_size(1) fn main() {
+  // make sure the overridable constants are not optimized out
+  _ = c0;
+  _ = c1;
+}
+          `,
+      });
+    }, true);
+  });
+
+g.test('name_conflict')
+  .desc(
+    `
+Tests that overrides' variable name should not conflict, regardless of their numeric identifiers.
+`
+  )
+  .fn(async t => {
+    t.expectValidationError(() => {
+      t.device.createShaderModule({
+        code: `
+override c0: u32;
+override c0: u32;
+
+@compute @workgroup_size(1) fn main() {
+  // make sure the overridable constants are not optimized out
+  _ = c0;
+}
+          `,
+      });
+    }, true);
+
+    t.expectValidationError(() => {
+      t.device.createShaderModule({
+        code: `
+@id(1) override c0: u32;
+override c0: u32;
+
+@compute @workgroup_size(1) fn main() {
+  // make sure the overridable constants are not optimized out
+  _ = c0;
+}
+          `,
+      });
+    }, true);
+
+    t.expectValidationError(() => {
+      t.device.createShaderModule({
+        code: `
+@id(1) override c0: u32;
+@id(2) override c0: u32;
+
+@compute @workgroup_size(1) fn main() {
+  // make sure the overridable constants are not optimized out
+  _ = c0;
+}
+          `,
+      });
+    }, true);
+  });