Add float32-blendable feature validation tests (gpuweb#4003)

* Add float32-blendable feature validation tests

* apply suggestion

* roll types

---------

Co-authored-by: Kai Ninomiya <kainino@chromium.org>

package.json

@@ -50,7 +50,7 @@
     "@types/w3c-image-capture": "^1.0.10",
     "@typescript-eslint/eslint-plugin": "^6.9.1",
     "@typescript-eslint/parser": "^6.9.1",
-    "@webgpu/types": "^0.1.48",
+    "@webgpu/types": "^0.1.49",
     "ansi-colors": "4.1.3",
     "babel-plugin-add-header-comment": "^1.0.3",
     "babel-plugin-const-enum": "^1.2.0",

src/webgpu/api/validation/render_pipeline/float32_blendable.spec.ts

@@ -0,0 +1,47 @@
+export const description = `
+Tests for capabilities added by float32-blendable flag.
+`;
+
+import { makeTestGroup } from '../../../../common/framework/test_group.js';
+import { ColorTextureFormat } from '../../../format_info.js';
+
+import { CreateRenderPipelineValidationTest } from './common.js';
+
+export const g = makeTestGroup(CreateRenderPipelineValidationTest);
+
+const kFloat32Formats: ColorTextureFormat[] = ['r32float', 'rg32float', 'rgba32float'];
+
+g.test('create_render_pipeline')
+  .desc(
+    `
+Tests that the float32-blendable feature is required to create a render
+pipeline that uses blending with any float32-format attachment.
+`
+  )
+  .params(u =>
+    u
+      .combine('isAsync', [false, true])
+      .combine('enabled', [true, false] as const)
+      .beginSubcases()
+      .combine('hasBlend', [true, false] as const)
+      .combine('format', kFloat32Formats)
+  )
+  .beforeAllSubcases(t => {
+    if (t.params.enabled) {
+      t.selectDeviceOrSkipTestCase('float32-blendable');
+    }
+  })
+  .fn(t => {
+    const { isAsync, enabled, hasBlend, format } = t.params;
+
+    const descriptor = t.getDescriptor({
+      targets: [
+        {
+          format,
+          blend: hasBlend ? { color: {}, alpha: {} } : undefined,
+        },
+      ],
+    });
+
+    t.doCreateRenderPipelineTest(isAsync, enabled || !hasBlend, descriptor);
+  });

src/webgpu/capability_info.ts

@@ -830,6 +830,7 @@ export const kFeatureNameInfo: {
   'shader-f16':                         {},
   'rg11b10ufloat-renderable':           {},
   'float32-filterable':                 {},
+  'float32-blendable':                  {},
   'clip-distances':                     {},
   'dual-source-blending':               {},
 };