1 files changed, 62 insertions, 0 deletions
diff --git a/dom/webgpu/tests/cts/checkout/src/webgpu/shader/validation/expression/call/builtin/unpack2x16unorm.spec.ts b/dom/webgpu/tests/cts/checkout/src/webgpu/shader/validation/expression/call/builtin/unpack2x16unorm.spec.ts
new file mode 100644
index 0000000000..7fcc96f22f
--- /dev/null
+++ b/dom/webgpu/tests/cts/checkout/src/webgpu/shader/validation/expression/call/builtin/unpack2x16unorm.spec.ts
@@ -0,0 +1,62 @@
+const kFn = 'unpack2x16unorm';
+export const description = `Validate ${kFn}`;
+
+import { makeTestGroup } from '../../../../../../common/framework/test_group.js';
+import { keysOf } from '../../../../../../common/util/data_tables.js';
+import { ShaderValidationTest } from '../../../shader_validation_test.js';
+
+const kArgCases = {
+  good_u32: '(1u)',
+  good_aint: '(1)',
+  bad_0args: '()',
+  bad_2args: '(1u,2u)',
+  bad_i32: '(1i)',
+  bad_f32: '(1f)',
+  bad_f16: '(1h)',
+  bad_bool: '(false)',
+  bad_vec2u: '(vec2u())',
+  bad_vec3u: '(vec3u())',
+  bad_vec4u: '(vec4u())',
+  bad_array: '(array(1))',
+  bad_struct: '(modf(1.1))',
+};
+const kGoodArgs = kArgCases['good_u32'];
+const kReturnType = 'vec2f';
+
+export const g = makeTestGroup(ShaderValidationTest);
+
+g.test('args')
+  .desc(`Test compilation failure of ${kFn} with various numbers of and types of arguments`)
+  .params(u => u.combine('arg', keysOf(kArgCases)))
+  .beforeAllSubcases(t => {
+    if (t.params.arg === 'bad_f16') {
+      t.selectDeviceOrSkipTestCase('shader-f16');
+    }
+  })
+  .fn(t => {
+    let code = '';
+    if (t.params.arg === 'bad_f16') {
+      code += 'enable f16;\n';
+    }
+    code += `const c = ${kFn}${kArgCases[t.params.arg]};`;
+
+    t.expectCompileResult(t.params.arg.startsWith('good'), code);
+  });
+
+g.test('return')
+  .desc(`Test ${kFn} return value type ${kReturnType}`)
+  .params(u => u.combine('type', ['vec2u', 'vec2i', 'vec2f', 'vec2h', 'vec4f', 'vec3f', 'f32']))
+  .fn(t => {
+    t.expectCompileResult(
+      t.params.type === kReturnType,
+      `const c: ${t.params.type} = ${kFn}${kGoodArgs};`
+    );
+  });
+
+g.test('must_use')
+  .desc(`Result of ${kFn} must be used`)
+  .params(u => u.combine('use', [true, false]))
+  .fn(t => {
+    const use_it = t.params.use ? '_ = ' : '';
+    t.expectCompileResult(t.params.use, `fn f() { ${use_it}${kFn}${kGoodArgs}; }`);
+  });