1 files changed, 37 insertions, 0 deletions
diff --git a/dom/webgpu/tests/cts/checkout/src/webgpu/shader/validation/parse/builtin.spec.ts b/dom/webgpu/tests/cts/checkout/src/webgpu/shader/validation/parse/builtin.spec.ts
new file mode 100644
index 0000000000..3c684ee0fb
--- /dev/null
+++ b/dom/webgpu/tests/cts/checkout/src/webgpu/shader/validation/parse/builtin.spec.ts
@@ -0,0 +1,37 @@
+export const description = `Validation tests for @builtin`;
+
+import { makeTestGroup } from '../../../../common/framework/test_group.js';
+import { ShaderValidationTest } from '../shader_validation_test.js';
+
+export const g = makeTestGroup(ShaderValidationTest);
+
+const kValidBuiltin = new Set([
+  `@builtin(position)`,
+  `@builtin(position,)`,
+  `@ \n builtin(position)`,
+  `@/^ comment ^/builtin/^ comment ^/\n\n(\t/^comment^/position/^comment^/)`,
+]);
+const kInvalidBuiltin = new Set([
+  `@abuiltin(position)`,
+  `@builtin`,
+  `@builtin()`,
+  `@builtin position`,
+  `@builtin position)`,
+  `@builtin(position`,
+  `@builtin(position, frag_depth)`,
+  `@builtin(identifier)`,
+  `@builtin(2)`,
+]);
+
+g.test('parse')
+  .desc(`Test that @builtin is parsed correctly.`)
+  .params(u => u.combine('builtin', new Set([...kValidBuiltin, ...kInvalidBuiltin])))
+  .fn(t => {
+    const v = t.params.builtin.replace(/\^/g, '*');
+    const code = `
+@vertex
+fn main() -> ${v} vec4<f32> {
+  return vec4<f32>(.4, .2, .3, .1);
+}`;
+    t.expectCompileResult(kValidBuiltin.has(t.params.builtin), code);
+  });